DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface General Description Features The AAT3608 is a member of Skyworks' Total Power Management IC (TPMIC™) product family. It contains a single-cell lithium ion/polymer battery charger, two 800mA switching regulators, and five low dropout (LDO) regulators in a small Pb-free 40-pin 5mmx5mm TQFN package, making it ideal for portable space-constrained systems. The single-input linear charger powers up from an adapter or a USB port. The adapter charge current is programmable with an external resistor or pin selectable between 100mA and 500mA when connected to a USB port. The device integrates a load switch for dynamic power path and features deep sleep mode operation. The step-down regulators are monolithic synchronous converters integrating the compensation network and soft start circuitry. The 1.5MHz operating frequency enables the use of tiny 2.2μH inductors and small 4.7μF output capacitors. External resistors set the output voltage for Buck 1 and Buck 2; the output voltage of Buck 2 is dynamically adjustable with I2C. The LDO regulators feature 3% output voltage accuracy over the full operating temperature range. The fast control loop of the LDO regulators also provide excellent transient response with a typical output voltage deviation of 1.5%. The AAT3608 provides protection features to safeguard from overtemperature operation, over-current operation, and a digital thermal loop to protect the battery during battery charging. The device is rated over an ambient temperature range of -40°C to 85°C. • 2.7V to 5.5V Operating Input Voltage Range • Adapter or USB Single Input Linear Charger • Battery Charger Digital Thermal Regulation • Battery Temperature Monitoring • Battery Charger Includes Programmable Timer • Input Load Switch • Dual 800mA Monolithic Switching Converters ▪ 1.5MHz Switching Frequencies ▪ 95% Efficiency ▪ Independent Input Power and Ground ▪ Buck1 Output Programmable With External Resistors Buck 2 Feedback Voltage is Dynamically Adjustable ▪ between 0.5V and 0.7V with I2C Interface • Five Channel LDO Regulators ▪ 300mA, Output Adjustable via Two Logic Inputs ▪ 80mA, Output Adjustable via I2C Interface ▪ 50mA, 2.5V Output Voltage ▪ 50mA, 3.3V Output Voltage ▪ 80mA with 1.2V Fixed Output ▪ 3% Accuracy and 1.5% Typical Transient Accuracy • Very Low Shutdown Current • Power-On Push Button • Status Outputs ▪ Interrupt, Reset and Status Pins, Low Battery Flag • Separate Enable Pin for LDO2, LDO4, LDO5, and Buck2 (when mask is removed) • Over-Current and Over-Thermal Protection • 5mmx5mm, 40-Pin TQFN Package Applications •GPS • Handheld Devices • Mobile Media Players •MP3 • Portable Navigation Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 1 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface Typical Application Circuit 2 B AT B AT PWR_ON PWR_HOLD PWR_EN SDA AAT3608 SCL TS PBSTAS INT STAT LBO LBI RESET ISETA CT SYSOUT C2 CSYSOUT L1 Buck 1 R2 FB1 C8 R3 PGND PGND1 PGND2 Buck 2 R4 C10 R5 L2 LX2 FB2 PGND2 C12 PWR_IN C1 SYSOUT SYSOUT INBUCK INLDO INLDO LX1 PGND1 R6 PWR_ID USBSEL S2 S1 EXT_ON GND C3 VBAT PWR_IN VIN LDO1 LDO2 LDO3 LDO4 LDO1 LDO2 LDO3 LDO4 LDO5 LDO5 C13 C14 C15 C16 C17 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface Pin Descriptions Pin # Symbol 1 STAT 2 ISETA 3 TS 4 CT 5 6 7 8 9 10 11 LDO2 INLDO LDO3 LDO1 INLDO LDO4 LDO5 12 PBSTAS 13 RESET 14 INT 15 Function LBO Open drain (pull-down) output for battery charging status. Input pin for charge current programming for the adapter. Connect a 1.24kΩ resistor to get 800mA of charging current. Can be used to monitor charging current. Battery temperature sense pin with 75μA output current. Connect the battery’s NTC 10kΩ resistor from this pin to ground. A Beta range of 3300 to 4000 will place the typical charging temperature between -4°C and 48°C. Charger safety timer pin. A 0.1μF ceramic capacitor should be connected between this pin and GND. Connect directly to GND to disable the timer function. Output for LDO2 regulator. Input power for LDO regulators. Output for LDO3 regulator. Output for LDO1 regulator. Input power for LDO regulators. Output for LDO4 regulator. Output for LDO5 regulator. Open drain (pull-down) output for PWR_ON status. When PWR_ON is high, PBSTAS will be low (after the debounce time). When PWR_ON is low, PBSTAS will be high (or equal to the voltage to which that external pull-up resistor is connected). Open drain (pull-down) active-low output for reset. After Buck2 is OK, there is a delay of 200ms before RESET goes High. RESET pin is low in shutdown. Open drain (pull-down) active-low output for interrupt. When any of the I2C read bits (except the DS_RDY and PWR_DS bits) change state this pin will pull low. It will be released again after a read from the I2C is complete. Open drain (pull-down) active-low output for low-battery comparator. When the battery is low, LBO will pull down. 16 LBI Feedback input for low-battery comparator. The LBI threshold is 1.0V. 17 18 19 GND S2 S1 20 PWR_EN 21 22 23 24 25 26 27 28, 29 FB2 PGND2 LX2 INBUCK LX1 PGND1 FB1 BAT 30 SDA I2C serial data pin. 31 SCL I2C serial clock pin. 32 PWR_HOLD 33 PWR_ON 34 EXT_ON 35, 36 37 38, 39 SYSOUT PWR_ID PWR_IN 40 USBSEL EP EP Ground. S1 and S2 bits set the output voltage for LDO1. S1 and S2 bits set the output voltage for LDO1. Enable for LDO2, LDO4, and LDO5 for default condition. Buck2 can also be controlled by PWR_EN only if the SOC masks PWR_EN through I2C, refer to the "I2C Serial Interface and Programmability" section of this datasheet for additional information. Feedback input for Buck2 regulator. Power ground for Buck2 regulator. Switching node for Buck2 regulator. Input power for Buck regulators. Switching node for Buck1 regulator. Power ground for Buck1 regulator. Feedback input for Buck1 regulator. Input for lithium-ion battery. Enable for the system. PWR_HOLD must be held high by the processor to keep system turned on. To shut down the device, the microcontroller should pull PWR_HOLD to ground. Enable for the system. Connect a push-button from this pin to BAT to activate system. It is debounced for 320ms. Alternate system enable; may be used by the RTC alarm or other system input. This pin's function is similar to PWR_ON; it has a similar 320ms debounce but does not affect the PBSTAS pin. System output. Connect to the INLDO and INBUCK input supply pins. Logic input to identify the source of PWR_IN. Power Input. System input from adapter or USB. Logic input to select 500mA current limit and fast charge current (USBSEL=H) or 100mA current limit and fast charge (USBSEL=L). An internal pull-down resistor is connected to this pin. If is left floating,USBSEL is pulled to ground. For best thermal performance the exposed thermal pad must be thermally connected to a large exposed copper pad underneath the package. Additionally, the exposed thermal pad (EP), GND, and PGND must be electrically connected to ground copper. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 3 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface Pin Configuration TQFN55-40 (Top View) SCL PWR_HOLD PWR_ON EXT_ON SYSOUT SYSOUT PWR_ID PWR_IN PWR_IN USBSEL STAT ISETA TS CT LDO2 INLDO LDO3 LDO1 INLDO LDO4 40 39 38 37 36 35 34 33 32 31 1 30 2 29 3 28 4 27 5 26 EP 6 25 7 24 8 23 9 22 10 21 11 12 13 14 15 16 17 18 19 SDA BAT BAT FB1 PGND1 LX1 INBUCK LX2 PGND2 FB2 20 PWR_EN S1 S2 GND LBI LBO INT RESET PBSTAS LDO5 Absolute Maximum Ratings1 Symbol Pin Name PWR_IN, PWR_ID, BAT, SYSOUT, SDA, SCL, RESET, STAT, USBSEL, ISETA, TS, CT, LBI, LBO, INT, PWR_EN, PWR_HOLD, PWR_ON, PBSTAS, EXT_ON, S1, S2 Voltage to GND INBUCK, INLDO Voltage to GND LX1, LX2, FB1, FB2 Voltage to PGND1, PGND2 LDO1, LDO2, LDO3, LDO4, LDO5 Voltage to GND TJ TA TS TLEAD PGND1, PGND2 to GND Operating Junction Temperature Range Ambient Temperature Range Storage Temperature Range Maximum Junction Soldering Temperature (at leads, 10 sec.) Value Units -0.3 to 6.5 V -0.3 to VSYSOUT + 0.3 -0.3 to VINBUCK + 0.3 -0.3 to VINLDO + 0.3 -0.3 to +0.3 -40 to 150 -40 to 85 -65 to 150 300 V V V V °C Thermal Information2, 3, 4 Symbol θJA PD Description Thermal Resistance Maximum Power Dissipation Value Units 25 4 °C/W W 1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at conditions other than the operating conditions specified is not implied. Only one Absolute Maximum Rating should be applied at any one time. 2. Thermal Resistance will be measured with the AAT3608 device on the 4-layer FR4 evaluation board in a thermal oven. The amount of power dissipation which will cause the thermal shutdown to activate will depend on the ambient temperature and the PC board layout ability to dissipate the heat. 3. Measured on the AAT3608 demo board. 4. Derate the maximum power dissipation by 40mW/°C above 25°C ambient temperature. 4 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface Electrical Characteristics1 VPWR_IN = 5V, VPWR_ID = 5V, VBAT = 3.6V, -40°C ≤ TA ≤ +85°C, unless noted otherwise. Typical values are TA = 25°C. Symbol Description Power Supply VIN VINBUCK, VINLDO Input Operating Voltage PWR_IN UVLO Threshold IOPS Sleep Mode Battery Operating Current IOPDS Deep-Sleep Mode Battery Operating Current ISHDN Battery Shutdown Current Charger Voltage Regulation VBAT_REG Output Charge Voltage Regulation VMIN Preconditioning Voltage Threshold VRCH Battery Recharge Voltage Threshold Charger Current Regulation ICH_CC Constant-Current Mode ADP Charge Current USB Charge Current USB Charge Current KISET Charge Current Set Factor: ICH_CC/IISET ICH_PRE Preconditioning Charge Current ICH_TERM Charge Termination Threshold Current Charging Device RDS(ON),CHG On-Resistance of Charging Transistor Logic Control / Protection VPWR_HOLD, Input High Threshold VPWR_ON, Input Low Threshold VUSBSEL VINT, VSTAT Output Low Voltage VOVP Over-Voltage Protection Threshold IOCP Over Current Protection Threshold TC Constant Current Mode Time Out TK Trickle Charge Time Out TV Constant Voltage Mode Time Out ITS Current Source from TS Pin TS1 TS Hot Temperature Fault TS2 TS Cold Temperature Fault Conditions Min BAT-SYSOUT Current Limit 5.5 4.5 V V 200 µA 0°C ≤ TA ≤ +70°C 10 4.158 2.6 RISETA = 1.24kΩ (for 0.8A) (Can be set to up to 1.2A) USBSEL = H, PWR_ID = L USBSEL = L, PWR_ID = L Constant Current Mode RISETA = 1.24kΩ SYSOUT to BAT Switch 4.2 2.8 4.00 4.242 3.0 500 100 800 12 5 mA mA mA/ mA % ICH_CC % ICH_CC 0.9 69 318 2.30 USBSEL = High, PWR_ID = L USBSEL = Low, PWR_ID = L 400 Ω V Pin Sinks 4mA Falling Threshold Hysteresis Rising Threshold Hysteresis V V V mA 1.4 CCT = 100nF µA µA 800 0.6 On-Resistance of PWR_IN-SYSOUT Load Switch PWR_IN-SYSOUT Current Limit PWR_IN-SYSOUT Current Limit Units 100 BAT-SYSOUT RDS(ON), Max 2.7 Rising (100mV hysteresis) VPWR_IN = 0V, Only LDO1, LDO3, and Buck1 are on VPWR_IN = 0V, Only Buck1 is on VPWR_IN = 0V and system is shut down TLOOP_IN Thermal Loop Entering Threshold TLOOP_OUT Thermal Loop Exiting Threshold TREG Thermal Loop Regulation Load Switches / SYSOUT LDO RDS(ON), On-Resistance of BAT-SYSOUT Load Switch PWR_IN-SYSOUT Typ 4.3 105 3 TC/8 3 75 331 25 2.39 25 115 85 100 0.3 V 0.4 V V % ICH_CC Hours Hours Hours µA mV mV V mV °C °C °C 79 346 2.48 100 150 mΩ 0.2 0.3 Ω 2 450 100 2 500 A mA mA A 1. Specification over the -40°C to +85°C operating temperature range is assured by design, characterization and correlation with statistical process controls. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 5 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface Electrical Characteristics (continued)1 VPWR_IN = 5V, VPWR_ID = 5V, VBAT = 3.6V, -40°C ≤ TA ≤ +85°C, unless noted otherwise. Typical values are TA = 25°C. Symbol Description Step-Down Buck Regulator (Buck1) VINBUCK Input Voltage Range VOUT Output Voltage Programmable Range VREG Output Voltage Accuracy ILIM P-Channel Current Limit RDS(ON)H High-Side Switch On-Resistance RDS(ON)L Low-Side Switch On-Resistance ΔVOUT / Line Regulation (VOUT ΔVIN) FOSC Oscillator Frequency Step-Down Buck Regulator (Buck2) VINBUCK Input Voltage Range Feedback Voltage Programmable VFB Range VREG Output Voltage Accuracy ILIM P-Channel Current Limit RDS(ON)H High-Side Switch On-Resistance RDS(ON)L Low-Side Switch On-Resistance ΔVOUT / Line Regulation (VOUT ΔVIN) FOSC Oscillator Frequency Low-Dropout Regulator (LDO1) VINLDO Input Voltage Range VLDO IQ LDO Output Voltage LDO Quiescent Current Line Regulation Dropout Voltage ILDO LDO Maximum Load Current ILDO(LIM) LDO Current Limit Low-Dropout Regulator (LDO2) VINLDO Input Voltage Range VLDO IQ LDO Output Voltage LDO Quiescent Current Line Regulation LDO Maximum Load Current ILDO(LIM) LDO Current Limit Low-Dropout Regulator (LDO3) VINLDO Input Voltage Range Output Voltage Range Conditions Using External Feedback Resistors, No Load IOUT = 10mA IQ ILDO ILDO(LIM) LDO Output Voltage LDO Quiescent Current Line Regulation LDO Maximum Load Current LDO Current Limit 2.7 0.6 0.582 Typ 0.600 2600 450 400 Max Units 5.5 VINBUCK 0.618 V V V mA mΩ mΩ 0.2 %/V 1.5 MHz 2.7 5.5 V Using I2C, with Default FB = 0.6V 0.5 0.7 V IOUT = 10mA -3 +3 2600 450 400 % mA mΩ mΩ 0.2 %/V 1.5 MHz ILDO = 1mA to 300mA, S1 = 0, S2 = 0 ILDO = 1mA to 300mA, S1 = 0, S2 = 1 ILDO = 1mA to 300mA, S1 = 1, S2 = 0 VINLDO = 5V, added quiescent current when LDO is enabled ILDO = 10mA ILDO = 300mA 2.7 2.91 3.20 2.71 3.00 3.30 2.80 5.5 3.09 3.40 2.89 V V V V 50 90 µA 0.09 100 170 500 800 2.7 ILDO = 1mA to 80mA 1.164 VINLDO = 5V, added quiescent current when LDO is enabled ILDO = 10mA ILDO VLDO Min 5.5 V 1.2 1.236 V 35 80 µA 0.09 %/V mA mA 200 800 Using I2C. Default=1.2V 2.7 0.8 5.5 1.4 V V ILDO = 1mA to 80mA -3 +3 % 80 µA VINLDO = 5V, added quiescent current when LDO is enabled ILDO = 10mA 35 0.09 200 800 1. Specification over the -40°C to +85°C operating temperature range is assured by design, characterization and correlation with statistical process controls. 6 %/V mV mA mA Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 %/V mA mA DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface Electrical Characteristics (continued)1 VPWR_IN = 5V, VPWR_ID = 5V, VBAT = 3.6V, -40°C ≤ TA ≤ +85°C, unless noted otherwise. Typical values are TA = 25°C. Symbol Description Low-Dropout Regulator (LDO4) VINLDO Input Voltage Range VLDO LDO Output Voltage IQ LDO Quiescent Current Line Regulation LDO Maximum Load Current ILDO(LIM) LDO Current Limit Low-Dropout Regulator (LDO5) VINLDO Input Voltage Range VLDO LDO Output Voltage Conditions ILDO = 1mA to 50mA VINLDO = 5V, added quiescent current when LDO is enabled ILDO = 10mA ILDO IQ LDO Quiescent Current Line Regulation LDO Maximum Load Current ILDO(LIM) LDO Current Limit Reset and Low-Battery Comparator Reset Time Low-Battery Threshold Voltage Thermal TSD Over-Temperature Shutdown Threshold THYS Over-Temperature Shutdown Hysteresis SCL, SDA (I2C Interface) FSCL Clock Frequency TLOW Clock Low Period THIGH Clock High Period THD_STA Hold Time for START Condition TSU_STA Set-up Time for Repeated START Condition TSU_DAT Data Setup Time THD_DAT Data Hold Low Time TSU_STO Setup Time for STOP Condition Bus Free Time Between STOP and START TBUF Condition VIL Input Threshold Low VIH Input Threshold High II Input Leakage Current VOL Output Logic Low (SDA) Typ Max Units 2.7 2.425 2.5 5.5 2.575 V V 50 80 µA 0.09 %/V mA mA 200 800 ILDO = 1mA to 50mA VINLDO = 5V, added quiescent current when LDO is enabled ILDO = 10mA ILDO Buck2 Power OK Threshold Min 2.7 3.2 3.3 5.5 3.4 V V 50 80 µA 0.09 %/V mA mA 200 800 Rising threshold Hysteresis From Power OK of BUCK2 output to RESET pin rising edge Falling Edge Hysteresis 91 0.96 Rising 3 % % 200 ms 1.0 50 1.04 140 15 0 1.3 0.6 0.6 0.6 100 °C °C 400 0.6 kHz µs µs µs µs ns µs µs 1.3 µs 0.9 2.7V ≤ VIN ≤ 5.5V 2.7V ≤ VIN ≤ 5.5V V mV 0.3 1.4 -1.0 IPULLUP = 3mA 1.0 0.3 V V µA V 1. Specification over the -40°C to +85°C operating temperature range is assured by design, characterization and correlation with statistical process controls. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 7 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface Typical Characteristics−Charger Power-In to SYSOUT Switch Current Limit Power-In to SYSOUT Switch Current Limit (100mA) 180 2.5 1.5 1.0 0.5 0.0 0.5A 2.0A 0 I(PWRIN-SYSOUT) (mA) I(PWRIN-SYSOUT) (A) 160 2.0 140 120 100 80 60 40 20 0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0 3.3 3.6 3.9 4.2 0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0 3.3 3.6 3.9 4.2 V(PWRIN-SYSOUT) (V) V(PWRIN-SYSOUT) (V) IBAT vs. Temperature IBAT vs. Temperature (500mA) 100.2 501 100.0 500 99.8 499 99.6 IBAT (mA) IBAT (mA) (100mA) 99.4 99.2 99.0 497 496 495 98.8 494 98.6 98.4 -60 498 -40 -20 0 20 40 60 80 493 -60 100 -40 -20 Temperature (°C) I(BAT-SYSOUT) (mA) 2.5 2.0 1.5 1.0 0.5 0.5 1.0 1.5 2.0 2.5 V(BAT-SYSOUT) (V) 40 60 80 100 3.0 3.5 4.0 Constant Charging Current vs. RSET Constant Charging Current (mA) 3.0 0 20 Temperature (°C) Ideal Diode Load Switch between VBAT and VSYSOUT 0.0 0 10000 1000 100 10 1 0.1 1 10 100 1000 RSET (kΩ) Constant Current Trickle Charge 8 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface Typical Characteristics−Charger Adapter Mode Supply Current vs. RSET Resistor 5.0 Constant Current Preconditioning 4.5 4.0 IQ (mA) 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 0.1 1 10 RSET (kΩ) 100 1000 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 9 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface Typical Characteristics−Buck1 Efficiency vs. Load Load Regulation (VB1 = 2.5V; L1 = 2.2µH) (VB1 = 2.5V; L1 = 2.2µH) 100 Output Voltage Error (%) 2.5 90 Efficiency (%) 80 70 60 50 40 VBAT = 3.3V VBAT = 3.6V VBAT = 3.9V VBAT = 4.2V 30 20 10 0 0.1 1 10 100 2.0 1.5 1.0 0.5 0.0 -0.5 -1.5 -2.0 -2.5 0.1 1000 Output Current (mA) 0.45 0.40 0.35 4.0 4.1 3.6 0 2.55 2.50 2.45 0.2 0.0 4.2 VBAT Voltage (V) Time (100µs/div) Output Ripple System Line Transient Response 0 2.52 2.50 2.48 1.0 0.8 0.6 6 Sysout Voltage (top) (V) VBAT Voltage (middle) (V) 3.6 5 4 3 2 2.7 2.5 2.3 2.1 Time (200µs/div) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 Output Voltage (bottom) (V) 10 (VIN = 3.5V to 5V; VBAT = 3.6V; VOUTB1 = 2.5V; IOUTB1 = 800mA; falling) LX Voltage (top) (V) Inductor Current (bottom) (A) Output Voltage (middle) (V) (VBAT = 3.6V; VB1 = 2.5V; IOUTB1 = 800mA) Time (500ns/div) 1000 Output Ripple Output Voltage (middle) (V) Input Current (mA) 85°C 25°C -40°C 3.9 100 LX Voltage (top) (V) Inductor Current (bottom) (A) 0.50 3.8 10 (VBAT = 3.6V; VB1 = 2.5V; IOUTB1 = 1mA) (VEN = VBAT; Closed Loop) 3.7 1 Output Current (mA) No Load Total Input Current vs. VBAT Voltage 0.30 3.6 VBAT = 3.3V VBAT = 3.6V VBAT = 3.9V VBAT = 4.2V -1.0 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface Typical Characteristics−Buck1 (continued) System Line Transient Response System Load Transient Response (VIN = 3.5V to 5V; VBAT = 3.6V; VOUTB1 = 2.5V; IOUTB1 = 800mA; rising) (IOUTB1 = 80mA to 800mA; VBAT = 3.6V; COUTB1 = 4.7µF; CFF1 = 0pF) 1.5 5 2 2.7 2.5 Output Voltage (bottom) (V) 3 Output Voltage (bottom) (V) 4 0.0 2.7 2.5 2.3 2.1 2.1 Time (100µs/div) Line Regulation Output Voltage Error vs. Temperature (VOUT1 = 2.5V; L1 = 2.2µH) (VBAT = 3.6V; VOUT1 = 2.5V) 0.3 1.5 Output Voltage Error (%) Output Voltage Error (%) 0.5 80mA 2.3 Time (200µs/div) 0.2 0.1 0.0 -0.1 IOUT = 50mA IOUT = 100mA IOUT = 400mA IOUT = 800mA -0.2 -0.3 3.3 3.5 3.7 3.9 4.1 4.3 0.5 0.0 -0.5 -1.0 -25 0 25 50 75 100 Temperature (°C) Switching Frequency vs. Temperature Switching Frequency vs. VBAT Voltage (VIN = 3.6V; VOUT1 = 2.5V; IOUT1 = 800mA) (VOUT1 = 2.5V; IOUT1 = 800mA) 0.20 Frequency Variation (%) 1.52 1.51 1.50 1.49 1.48 -40 IOUT1 = 10mA IOUT1 = 100mA IOUT1 = 400mA IOUT1 = 800mA 1.0 -1.5 -50 4.5 VBAT Voltage (V) Switching Frequency (MHz) 1.0 800mA Output Current (top) (A) Sysout Voltage (top) (V) VBAT Voltage (middle) (V) 6 -20 0 20 40 Temperature (°C) 60 80 100 0.15 0.10 0.05 0.00 -0.05 -0.10 -0.15 -0.20 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 VBAT Voltage (V) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 11 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface Typical Characteristics−Buck1 (continued) Soft Start 4 3 2 1 0 1.0 0.5 0.0 Output Current (bottom) (A) EnableVoltage (top) (V) Output Voltage (middle) (V) (VBAT = 3.6V; VOUT1 = 2.5V; IOUT1 = 800mA; CFF = 100pF) Time (100µs/div) 12 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface Typical Characteristics−Buck2 Efficiency vs. Load DC Regulation vs. Load (VB2 = 1.2V; L2 = 2.2µH) 100 2.5 90 2.0 80 1.5 Output Error (%) Efficiency (%) (VB2 = 1.2V; L2 = 2.2µH) 70 60 50 40 VBAT = 3.3V VBAT = 3.6V VBAT = 3.9V VBAT = 4.2V 30 20 10 0 0.1 1 10 100 1.0 0.5 0.0 -0.5 -1.0 -1.5 -2.0 -2.5 0.1 1000 Output Current (mA) Output Ripple 100 1000 Output Ripple 1.20 0.4 0.2 0.0 Time (50µs/div) Output Voltage (middle) (V) 1.22 3.6 0 1.22 1.20 1.18 1.0 0.8 0.6 Time (500ns/div) System Line Transient Response LX Voltage (top) (V) Inductor Current (bottom) (A) 0 LX Voltage (top) (V) Inductor Current (bottom) (A) Output Voltage (middle) (V) 10 (VBAT = 3.6V; VOUTB2 = 1.2V; IOUTB2 = 800mA) 3.6 System Line Transient Response (VIN = 3.5V to 5V; VBAT = 3.6V; VOUTB2 = 1.2V; IOUTB2 = 800mA; falling) (VIN = 3.5V to 5V; VBAT = 3.6V; VOUTB2 = 1.2V; IOUTB2 = 800mA; rising) 6 4 3 2 1.3 1.2 1.1 1.0 Time (200µs/div) 5 4 3 2 1.3 1.2 Output Voltage (bottom) (V) Sysout Voltage (top) (V) VBAT Voltage (middle) (V) 6 5 Output Voltage (bottom) (V) Sysout Voltage (top) (V) VBAT Voltage (middle) (V) 1 Output Current (mA) (VBAT = 3.6V; VOUTB2 = 1.2V; IOUTB2 = 1mA) 1.18 VBAT = 3.3V VBAT = 3.6V VBAT = 3.9V VBAT = 4.2V 1.1 1.0 Time (200µs/div) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 13 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface Typical Characteristics−Buck2 (continued) System Load Transient Response Line Regulation (IOUTB2 = 80mA to 800mA; VBAT = 3.6V; COUTB2 = 4.7µF; CFF1 = 0pF) (VOUT2 = 2.5V; L2 = 2.2µH) 0.3 1.0 Output Voltage (bottom) (V) 0.0 1.3 1.2 Output Current (top) (A) 0.5 80mA 1.1 1.0 Output Voltage Error (%) 1.5 800mA IOUT2 = 10mA IOUT2 = 50mA IOUT2 = 100mA IOUT2 = 400mA IOUT2 = 800mA 0.2 0.1 0.0 -0.1 -0.2 -0.3 3.2 0.5 0.0 -0.5 IOUT2 = 10mA IOUT2 = 100mA IOUT2 = 400mA IOUT2 = 800mA -1.0 50 Temperature (°C) 14 75 EnableVoltage (top) (V) Output Voltage (middle) (V) Output Voltage Error (%) 1.0 25 4.0 4.2 4.4 4 3 2 1 0 1.0 0.5 0.0 100 Time (100µs/div) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 Output Current (bottom) (A) 1.5 0 3.8 (VBAT = 3.6V; VOUT1 = 1.2V; IOUT2 = 800mA; CFF = 100pF) (VBAT = 3.6V; VOUT2 = 1.2V) -25 3.6 Soft Start Output Voltage Error vs. Temperature -1.5 -50 3.4 VBAT Voltage (V) Time (100µs/div) DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface Typical Characteristics−LDO1 System Line Transient Response System Line Transient Response (VIN = 3.5V to 5V; VBAT = 3.6V; VLDO1 = 3V; ILDO1 = 300mA; rising) (VIN = 3.5V to 5V; VBAT = 3.6V; VLDO1 = 3V; ILDO1 = 300mA; falling) 3 3.2 3.1 3.0 2.9 2.8 Time (200µs/div) 5 4 3 3.1 3.0 2.9 2.8 Time (200µs/div) Output Voltage Error vs. Temperature Line Regulation (VLDO1 = 3.0V) 0.3 1.5 Output Voltage Error (%) LDO1 Output Voltage Error (%) (VBAT = 3.6V; VLDO1 = 3.0V) 1.0 0.5 0.0 IOUT = 0.1mA IOUT = 10mA IOUT = 100mA IOUT = 150mA IOUT = 300mA -0.5 -1.0 -1.5 -50 -25 0 25 50 75 Temperature (°C) 0.1 0.0 -0.1 -0.2 LDO1 Output Voltage Error (%) LDO1 Output Voltage (bottom) (V) 0.1 0.0 2.90 Time (200µs/div) 4.2 4.4 Load Regulation LDO1 Output Current (top) (A) 0.2 4.0 (VBAT = 3.6V; VLDO1 = 3.0V) 0.4 2.95 3.8 Load Transient Response 3.00 3.6 VBAT Voltage (V) (ILDO1 = 30mA to 300mA; VBAT = 3.6V; VLDO1 = 3V; CLDO1 = 4.7µF) 3.05 IOUT = 0.1mA IOUT = 1mA IOUT = 10mA IOUT = 100mA IOUT = 150mA IOUT = 300mA 0.2 -0.3 3.4 100 0.3 LDO1 Output Voltage (bottom) (V) 4 Sysout Voltage (top) (V) VBAT Voltage (middle) (V) 6 5 LDO1 Output Voltage (bottom) (V) Sysout Voltage (top) (V) VBAT Voltage (middle) (V) 6 1.5 1.0 0.5 0.0 -0.5 -1.0 -1.5 0.1 1 10 100 1000 Output Current (mA) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 15 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface Typical Characteristics−LDO1 (continued) 4 3 2 1 0 200 100 0 LDO1 Output Current (bottom) (mA) Enable Voltage (top) (V) LDO1 Output Voltage (middle) (V) Soft Start (VBAT = 3.6V; VLDO1 = 3.0V; ILDO1 = 150mA) Time (100µs/div) 16 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface Typical Characteristics−LDO2 System Line Transient Response System Line Transient Response (VIN = 3.5V to 5V; VBAT = 3.6V; VLDO2 = 1.2V; ILDO2 = 80mA; rising) (VIN = 3.5V to 5V; VBAT = 3.6V; VLDO2 = 1.2V; ILDO2 = 80mA; falling) 6 3 2 1 1.3 0 1.2 1.1 Sysout Voltage (top) (V) VBAT Voltage (middle) (V) 4 1.0 Time (200µs/div) 4 3 1.3 1.2 1.1 1.0 Time (200µs/div) Load Transient Response Output Voltage Error vs. Temperature (ILDO2 = 8mA to 80mA; VBAT = 3.6V; VLDO2 = 1.2V; CLDO2 = 4.7µF) LDO2 Output Voltage Error (%) (VBAT = 3.6V; VLDO2 = 1.2V) 150 100 50 0 1.22 1.20 1.18 LDO2 Output Current (top) (mA) LDO2 Output Voltage (bottom) (V) 5 1.16 Time (200µs/div) 1.5 1.0 0.5 0.0 -0.5 -1.5 -50 LDO2 Output Voltage Error (%) LDO2 Output Accuracy (%) 0.1 0.0 -0.1 IOUT = 0.1mA IOUT = 1mA IOUT = 10mA IOUT = 100mA 3.8 4.0 VBAT Voltage (V) 25 50 75 100 Load Regulation 0.2 3.6 0 (VBAT = 3.6V; VLDO2 = 1.2V) 0.3 3.4 -25 Temperature (°C) (VLDO2 = 1.2V) -0.3 3.2 IOUT = 0.1mA IOUT = 1mA IOUT = 10mA IOUT = 100mA -1.0 Line Regulation -0.2 LDO2 Output Voltage (bottom) (V) 5 LDO2 Output Voltage (bottom) (V) Sysout Voltage (top) (V) VBAT Voltage (middle) (V) 6 4.2 4.4 1.5 1.0 0.5 0.0 -0.5 -1.0 -1.5 0.1 1 10 100 Output Current (mA) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 17 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface Typical Characteristics−LDO2 (continued) 4 3 2 1 0 100 50 0 LDO2 Output Current (bottom) (mA) Enable Voltage (top) (V) LDO2 Output Voltage (middle) (V) Soft Start (VBAT = 3.6V; VLDO2 = 1.2V; ILDO2 = 80mA) Time (100µs/div) 18 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface Typical Characteristics−LDO3 System Line Transient Response System Line Transient Response (VIN = 3.5V to 5V; VBAT = 3.6V; VLDO3 = 1.2V; ILDO3 = 80mA; rising) (VIN = 3.5V to 5V; VBAT = 3.6V; VLDO3 = 1.2V; ILDO3 = 80mA; falling) 6 3 1.4 1.3 1.2 1.1 Sysout Voltage (top) (V) VBAT Voltage (middle) (V) 4 1.0 Time (200µs/div) 5 4 3 1.3 1.2 1.1 1.0 Time (200µs/div) Load Transient Response Line Regulation (ILDO3 = 8mA to 80mA; VBAT = 3.6V; CLDO3 = 4.7µF) (VLDO3 = 1.2V) 0 1.22 1.20 1.18 LDO3 Output Accuracy (%) 50 LDO3 Output Current (top) (mA) LDO3 Output Voltage (bottom) (V) 150 100 1.16 Time (200µs/div) 0.3 0.2 0.1 0.0 -0.1 -0.3 3.2 LDO3 Output Voltage Error (%) LDO3 Output Voltage Error (%) 0.0 IOUT = 0.1mA IOUT = 1mA IOUT = 10mA IOUT = 100mA 25 50 Temperature (°C) 75 4.0 4.2 4.4 Load Regulation 0.5 0 3.8 (VBAT = 3.6V; VLDO3 = 1.2V) 1.0 -25 3.6 1.5 -1.5 -50 3.4 VBAT Voltage (V) (VBAT = 3.6V; VLDO3 = 1.2V) -1.0 IOUT = 0.1mA IOUT = 1mA IOUT = 10mA IOUT = 100mA -0.2 Output Voltage Error vs. Temperature -0.5 LDO3 Output Voltage (bottom) (V) 5 LDO3 Output Voltage (bottom) (V) Sysout Voltage (top) (V) VBAT Voltage (middle) (V) 6 100 1.5 1.0 0.5 0.0 -0.5 -1.0 -1.5 0.1 1 10 100 Output Current (mA) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 19 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface Typical Characteristics−LDO3 (continued) 4 3 2 1 0 100 50 0 LDO3 Output Current (bottom) (mA) Enable Voltage (top) (V) LDO3 Output Voltage (middle) (V) Soft Start (VBAT = 3.6V; VLDO3 = 1.2V; ILDO3 = 80mA) Time (100µs/div) 20 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface Typical Characteristics−LDO4 System Line Transient Response System Line Transient Response (VIN = 3.5V to 5V; VBAT = 3.6V; VLDO4 = 2.5V; ILDO4 = 50mA; rising) (VIN = 3.5V to 5V; VBAT = 3.6V; VLDO4 = 2.5V; ILDO4 = 50mA; falling) 3 2.7 2.6 2.5 2.4 2.3 Time (200µs/div) 5 4 3 2.7 2.6 2.5 2.4 2.3 Time (200µs/div) Load Transient Response Line Regulation (ILDO4 = 5mA to 50mA; VBAT = 3.6V; VLDO4 = 2.5V; CLDO4 = 4.7µF) (VLDO4 = 2.5V) 0 2.52 2.50 2.48 Output Voltage Error (%) 50 0.3 LDO4 Output Current (top) (A) LDO4 Output Voltage (bottom) (V) 150 100 2.46 0.2 0.1 0.0 -0.1 Time (200µs/div) LDO4 Output Voltage Error (%) LDO4 Output Voltage Error (%) 0.5 0.0 IOUT = 0.1mA IOUT = 1mA IOUT = 10mA IOUT = 100mA 25 50 Temperature (°C) 75 4.0 4.2 4.4 Load Regulation 1.0 -1.0 3.8 (VBAT = 3.6V; VLDO4 = 2.5V) 1.5 0 3.6 (VBAT = 3.6V; VLDO4 = 2.5V) -25 3.4 VBAT Voltage (V) Output Voltage Error vs. Temperature -1.5 -50 IOUT = 0.1mA IOUT = 1mA IOUT = 10mA IOUT = 100mA -0.2 -0.3 3.2 -0.5 LDO4 Output Voltage (bottom) (V) 4 Sysout Voltage (top) (V) VBAT Voltage (middle) (V) 6 5 LDO4 Output Voltage (bottom) (V) Sysout Voltage (top) (V) VBAT Voltage (middle) (V) 6 100 1.5 1.0 0.5 0.0 -0.5 -1.0 -1.5 0.1 1 10 100 Output Current (mA) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 21 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface Typical Characteristics−LDO4 (continued) 4 3 2 1 0 100 50 0 LDO4 Output Current (bottom) (mA) Enable Voltage (top) (V) LDO4 Output Voltage (middle) (V) Soft Start (VBAT = 3.6V; VLDO4 = 2.5V; ILDO4 = 50mA) Time (100µs/div) 22 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface Typical Characteristics−LDO5 System Line Transient Response System Line Transient Response (VIN = 3.5V to 5V; VBAT = 3.6V; VLDO5 = 3.3V; ILDO5 = 50mA; rising) (VIN = 3.5V to 5V; VBAT = 3.6V; VLDO5 = 3.3V; ILDO5 = 50mA; falling) 6 3 3.5 3.4 3.3 3.2 Sysout Voltage (top) (V) VBAT Voltage (middle) (V) 4 3.1 Time (200µs/div) 5 4 3 0 3.34 3.32 3.30 3.28 LDO5 Output Accuracy (%) LDO5 Output Voltage (bottom) (V) 50 3.26 Time (200µs/div) 0.3 0.2 0.1 0.0 -0.1 IOUT = 0.1mA IOUT = 1mA IOUT = 10mA IOUT = 100mA -0.2 -0.3 3.6 3.8 4.0 LDO5 Output Voltage Error (%) (VBAT = 3.6V; VLDO5 = 3.3V) 1.5 1.0 0.5 0.0 IOUT = 0.1mA IOUT = 1mA IOUT = 10mA IOUT = 100mA -1.0 50 Temperature (°C) 75 4.4 Load Regulation (VBAT = 3.6V; VLDO4 = 3.3V) -0.5 4.2 VBAT Voltage (V) Output Voltage Error vs. Temperature LDO5 Output Voltage Error (%) 3.1 (VLDO5 = 3.3V) LDO5 Output Current (top) (A) 100 25 3.2 Line Regulation 150 0 3.3 Time (200µs/div) Load Transient Response -25 3.4 (ILDO5 = 5mA to 50mA; VBAT = 3.9V; CLDO5 = 4.7µF) -1.5 -50 3.5 LDO5 Output Voltage (bottom) (V) 5 LDO5 Output Voltage (bottom) (V) Sysout Voltage (top) (V) VBAT Voltage (middle) (V) 6 100 1.5 1.0 0.5 0.0 -0.5 -1.0 -1.5 0.1 1 10 100 Output Current (mA) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 23 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface Typical Characteristics−LDO5 (continued) 4 3 2 1 0 0.10 0.05 0.00 LDO5 Output Current (bottom) (A) Enable Voltage (top) (V) LDO5 Output Voltage (middle) (V) Soft Start (VBAT = 3.6V; VLDO5 = 3.3V; ILDO5 = 50mA) Time (100µs/div) 24 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface Functional Block Diagram 1 Cell Li-Ion + To INBUCK, INLDO SYSOUT PWR_IN PWR_ID USBSEL 38,39 INBUCK 28,29 24 Load Switch Charge Switch Buck1 LBO Li-Ion Linear Charger Control 3 4 EXT_ON PWR_HOLD INT SDA SCL LBO LBI PGND1 Reset Thermal Shutdown 1 RESET 12 23 LX2 22 PGND2 20 34 2µ 2µ 32 SYSOUT L2 320ms Debounce 320ms Debounce Buck1 OK 6,9 Enable Control and I2C Logic LDO1 8 0.6V (default ) FB2 is I 2C adj. from 0.5V to 0.7V FB2 PWR_EN INLDO LDO1 300mA max 5 LDO2 BUCK2 800mA max 21 33 BUCK1 800mA max 0.6V to 5.5V INBUCK Buck2 3.3V/3.0V/2.8 V (S1 & S2 bits) LDO2 1.2 V (fixed) LDO3 1.2V (default ) 80mA max 14 LDO3 30 31 15 16 7 2 80mA max Output is I C adj. from 1.0 V to 1.4V 10 BAT + PWR_ON 26 L1 13 BUCK1 PBSTAS LX1 FB1 2 CT 25 27 40 TS STAT BAT 37 ISETA BAT 35,36 LDO4 1.0V LDO5 17 GND 19 S1 Functional Description The AAT3608 is a complete power management solution. It seamlessly integrates a battery charger with two stepdown converters and five low-dropout regulators to provide power from either an external power source or a single-cell Lithium Ion/Polymer battery. Internal load switches allow the converters to operate from the best available power source. If only the battery is available, then the voltage converters are powered directly from the battery through a 100 mΩ load switch (BAT to SYSOUT). During this condition, the charger is put into sleep mode and draws less than 1µA quiescent current. If the system is connected to a wall adapter, then the voltage converters are powered directly from the adapter through a 200mΩ load-switch (PWR_IN to SYSOUT) and the battery is disconnected from the voltage converter inputs. This allows the sys- S2 LDO4 2.5V (default ) LDO5 3.3V (default ) 50mA max 3.3V/2.85V/2.5V/1.8V (I 2C) 11 50mA max 3.3V/3.0V/1.5V/1.2V (I 2C) 18 tem to operate regardless of the state of the battery. It can even operate with no battery. System Output (SYSOUT) Intelligent control of the integrated load switches is managed by the switch control circuitry. If the voltage across PWR_IN and GND pin is above the UVLO typical threshold voltage of 4.5, then the switch control will automatically short the load switch connecting PWR_IN to SYSOUT. Additionally, the charging switch will be enabled and switch connecting BAT and SYSOUT will be turned off. The location of the two switches and the battery charging switch allows the step-down converter and LDO to always have the best available source of power. Furthermore, AAT3806 control logic allows the voltage converters to operate with no battery, or with a battery voltage below the trickle charge threshold. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 25 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface Battery Charging Battery charging commences only after the AAT3608 battery charger checks several conditions in order to maintain a safe charging environment. When an adapter input is connected to PWR_IN and is greater than 4.5V, the ENCHG bit is set (default) and the PWR_HOLD signal is high, the charger is enabled. The charger can be disabled by clearing the ENCHG bit through the I2C interface. Figure 1 illustrates the entire battery charging profile or operation, which consists of three phases: 1. Preconditioning (Trickle) Charge 2. Constant Current Charge 3. Constant Voltage Charge During battery charging, the battery charger initially checks the condition of the battery and determines which charging mode to apply. If the battery voltage is below VMIN, then the battery charger initiates trickle charge mode and charges the battery at 12% of the programmed constant-current magnitude. For example, if the programmed current (ISETA) is 500mA, then the trickle charge current will be 60mA. Trickle charge is a safety precaution for a deeply discharged cell. It is intended to reduce stress on the battery, but also reduces the power dissipation in the internal series pass MOSFET when the inputoutput voltage differential is at its highest. Trickle charge continues until the battery voltage reaches 2.8V. At this point the battery charger begins constant-current charging. The current level for this mode is programmed using a resistor from the ISETA pin to ground, or can be selected through the USBSEL pin with Charge Complete Voltage Preconditioning Trickle Charge Phase Constant Current (CC) Charge Phase ICH_CC Regulated Current settings of 100mA or 500mA; refer to the logic settings in Table 2. Constant-current charging continues until the voltage reaches the charge voltage regulation point. VBAT_REG is factory programmed to 4.2V (nominal). Charging in constant-voltage mode will continue until the charge current has reduced to the charge termination current threshold. After the charge cycle is complete, the battery charger turns off the series pass device and automatically goes into a power saving sleep mode. During this time, the series pass device will block current in both directions to prevent the battery from discharging through the battery charger. The battery charger will remain in sleep mode even if the charger source is disconnected. It will come out of sleep mode when either the battery terminal voltage drops below the VRCH threshold, or the charging source is removed and reconnected. In all cases, the battery charger will monitor all parameters and resume charging in the most appropriate mode. Battery Temperature Fault Monitoring The TS pin is available to monitor the battery temperature. Connect a 10k NTC resistor from the TS pin to ground. The TS pin outputs a 75µA constant current into the resistor and monitors the voltage to ensure that the battery temperature does not fall outside the operating limits depending on the temperature coefficient of the resistor used. When the voltage goes above 2.39V or goes below 0.331V, the charging will be suspended. A Beta range of 3300 to 4000 will place the typical charging temperature between -4°C and 48°C. Constant Voltage Charge Phase Battery Discharge (CC) Constant Voltage Charge Phase Battery Recharge Voltage Threshold Constant Current Mode Voltage Threshold (VMIN) Trickle Charge and Termination Threshold ICH_PRE Figure 1: Current vs. Voltage Profile During Charging Phases. 26 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface Battery Charging Flowchart Enable No Power on Reset Yes No Power Input Voltage VIN > VUVLO Enable Yes Shut Down Yes Fault Conditions Monitoring OV, OT, TS < VTS1 TS > VTS2 Expired Charge Timer Control No Yes Preconditioning Trickle Charge VBAT < VMIN Yes No Recharge Test VBAT < VRCH Yes Constant Current VBAT < VBAT_EOC Thermal Loop Thermal Loop Current Current Reductionin inADP Reduction C.C. ModeMode Charging Yes No No No Yes Device Thermal Loop Monitor TJ > 115 C Constant Voltage IBAT > ITERM No Charge Completed Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 27 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface Buck Regulators The AAT3608 step-down converters are peak current mode PWM converters operating at 1.5MHz frequency. The input voltage range is 2.7V to 5.5V. The converters provide internal compensation. Power devices are sized for 800mA output current while maintaining over 85% efficiency at full load. Peak efficiency is above 90%. Light load efficiency is maintained at greater than 80% down to 85% of full load current. Soft start limits the current surge seen at the input and eliminates output voltage overshoot. The input pin, INBUCK (Pin 24) must be connected to the SYSOUT output pin. The Buck1 output voltage is adjustable from 0.6V to 5.5V and is programmed through an external resistor divider. Buck2 output default value is set by external resistor feedback and then the feedback voltage can be dynamically adjusted via I2C in 12.5mV increments from 0.5V to 0.7V. For overload conditions, the peak input current is limited. Also, thermal protection completely disables switching if internal dissipation becomes excessive, thus protecting the device from damage. The junction overtemperature threshold is 140°C with 15°C of hysteresis. Under-voltage lockout (UVLO) guarantees sufficient VIN bias and proper operation of all internal circuits prior to activation. The current through the P-channel MOSFET (high side) is sensed for current loop control, as well as short circuit and overload protection. A fixed slope compensation signal is added to the sensed current to maintain stability for duty cycles greater than 50%. The peak current mode loop appears as a voltage-programmed current source in parallel with the output capacitor. The output of the voltage error amplifier programs the current mode loop for the necessary peak switch current to force a constant output voltage for all load and line conditions. Internal loop compensation terminates the transconductance voltage error amplifier output. The reference voltage is internally set to program the converter output voltage greater than or equal to 0.6V. For conditions where the input voltage drops to the output voltage level, the converter duty cycle increases to 100%. As the converter approaches the 100% duty cycle, the minimum off-time initially forces the high side on-time to exceed the 1.5MHz clock cycle and reduces the effective switching frequency. Once the input drops 28 below the level where the converter can regulate the output, the high side P-channel MOSFET is enabled continuously for 100% duty cycle. At 100% duty cycle the output voltage tracks the input voltage minus the I*R drop of the high side P-channel MOSFET. For overload conditions, the peak input current is limited. The bucks use a cycle-by-cycle current limit to protect itself and the load from an external fault condition. Thermal protection completely disables switching when internal dissipation becomes excessive. The junction over-temperature threshold is 140°C with 15°C of hysteresis. Once an over-temperature or over-current fault conditions is removed, the output voltage automatically recovers. Low-Dropout Regulators The advanced circuit design of the linear regulators has been specifically optimized for very fast start-up and shutdown timing. These proprietary LDOs are tailored for superior transient response characteristics. These traits are particularly important for applications which require fast power supply timing. The high-speed turn-on capability is enabled through the implementation of a fast start control circuit, which accelerates the power up behavior of fundamental control and feedback circuits within the LDO regulator. For fast turn-off time response is achieved by an active output pull down circuit, which is enabled when the LDO regulator is placed in the shutdown mode. This active fast shutdown circuit has no adverse effect on normal device operation. There are two LDO input pins, INLDO (pins 6 and 9), which must be connected to the SYSOUT output pin.The LDO1 output voltage is selectable using pins S1 and S2 as shown in Table 1. LDO2 is fixed at 1.2V, LDO4 is fixed at 2.5V and LDO5 is fixed at 3.3V. LDO3 output default value is 1.2V and then can be dynamically adjusted via I2C in 25mV increments from 1.0V to 1.4V. S1 S2 LDO1 0 0 1 1 0 1 0 1 3.0V 3.3V 2.8V Reserved Table 1: LDO1 Output Voltages. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface Controlling the System Outputs Deep Sleep Mode The AAT3608 has a specific startup and shutdown conditions depending on its mode of operation. “Deep Sleep Mode” is both an SOC and PMU-defined mode where all regulators have been turned off except for SYSOUT and Buck1. Data is backed up by the SOC and Buck1 stays alive to maintain the memory. LDO4 and LDO5 would be turned off separately by I2C, but the DS_RDY and PWR_DS I2C bits are used to get into and out of Deep Sleep Mode. See the flowchart diagrams for more detail. Shutdown Mode “Shutdown Mode” is defined as the mode where the entire PMU (Power Management Unit) is shut down. This is a state that normally happens after all power has been disconnected from PWR_IN and BAT. Typically, after power has been applied and the part has been turned on, it will normally never need to be turned off. For GPS applications, the amount of time required for the SOC to start up from shutdown is prohibitively long, so the only time that it will go into Shutdown Mode (from any other mode) is when PWR_IN is disconnected and the BAT is below the Low-Battery comparator threshold. Normal Mode “Normal Mode” is defined as the mode where all regulators are active. Once the part is in Normal Mode, it will typically go into Sleep or Deep-Sleep Mode when trying to save current. SOC Sleep Mode “Sleep Mode” is an SOC-defined mode which simply means that all regulators are shut down except SYSOUT, Buck1, LDO1, and LDO3. To get into this mode from Normal, the SOC will pull the PWR_EN pin low to turn off LDO2, LDO4, and LDO5. Buck2 can also be controlled by PWR_EN only if the SOC masks PWR_EN through I2C. From a PMU point of view, it is no different from Normal Mode except for the regulators that have been switched off by pulling PWR_EN low. PWR_ID Pin The PWR_ID pin is an input logic pin which determines the current limits and fast charge currents that will be used by PMU. PWR_ID settings are listed in Table 2. Timing Sequences The AAT3608 has a specific startup sequence when the device is activated. See the timing diagrams in Figures 2 through 7. RESET The RESET pin is an open drain active low output signal for system reset. Connect a pull-up resistor from the RESET pin to SYSOUT pin with a recommended resistance value of 100kΩ. After Buck2 and LDO2 reach their target nominal output voltage, a delay of 200ms exists before RESET goes high; refer to the timing diagram in Figure 2. PWR_ID Pin USBSEL Pin PWR_IN – SYSOUT Switch Current Limit Battery Fast Charge Current L L H L H X 100mA (typical) 500mA (typical) Up to 1.2A (typical) 100mA (typical) 500mA (typical) Set by the resistor at the ISETA pin. Table 2: PWR_ID Settings. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 29 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface Power off sequence Power on sequence Normal Mode SYSOUT Wake up sequence Sleep Mode Normal Mode SYSOUT LDO3 BUCK2 LDO1 BUCK1 PWR_ EN disabled PWR_EN pin LDO2 PWR_ EN asserted Triggered by PWR_EN LDO4 LDO5 RESET pin 1ms 200ms Figure 2: Normal Sleep Mode Sequence. The user pushes and releases the button to go into Sleep Mode . The user pushes and releases the pushbutton again to go back to Normal Mode . PWR_ON 2u The PMU regulators only react to the PWR_EN PWR_EN pin. PBSTAS 320ms Debounce PWR_HOLD AAT3608 PMU GPIO X_PWR_EN PWR_HOLD BUCK2 LDO2 LDO4 & LDO5 SOC Figure 3: Normal Sleep Mode Block Diagram. 30 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface Power off sequence Power on sequence Normal Mode Wake up sequence Deep-sleep Mode Normal Mode SYSOUT LDO3 BUCK2 LDO1 LDO2 BUCK1 LDO4 LDO5 LDO5 (VDDA3V3_USB), LDO4 (VDDA2V5_USB, VDDIO_TSC, VDDA_TSC, VREF_ADC) X_RESET_B T1 T2 T2 Notes 1: T1 at least 650µS for internal LVR setup time; T2 is about 2ms to wait until PLL is stable; other time interval is dependent on power stability. Notes 2: After wake-up sequence from Deep-sleep Mode, the power on sequence to Normal Mode is similar to when powering on initially. Figure 4: Normal Deep-Sleep Mode Sequence. Deep-Sleep Ready When Deep-Sleep is triggered (by the pushbutton) DS_RDY = 1 -SOC will back up all data PWR_DS = 0 -SOC will turn off LDO4 and LDO5 using I2C -SOC will set DS_RDY bit using I2C Buck1 on Buck2 on LDO1 on SOC sets PWR_DS bit through I2C. PMU sees that PWR_DS has been set so then PMU disables regulators Buck2, LDO1, LDO2, LDO3, LDO4,and LDO5 simultaneously. Each Buck output is at High-Z, but all LDOs will be pulled to GND. LDO2 on Deep-Sleep Mode LDO3 on LDO4 off Normal Mode DS_RDY = 1 LDO5 off PWR_DS = 1 SYSOUT on DS_RDY = 0 Buck1 on Charger on PWR_DS = 0 Buck2 off LB comp on LDO1 off Buck1 on LDO2 off Buck2 on LDO3 off LDO1 on LDO4 off LDO2 on LDO3 on LDO4 on LDO5 on SYSOUT on Charger on LB comp on LDO5 off 2 SOC reads I C DS_RDY bit from PMU. SOC first sets DS_RDY bit to 0 and then retrieves memory. SOC will pull up the PWR_EN pin to turn on LDO2, LDO4, and LDO5 simultaneously. SYSOUT on DS_RDY = 1 PWR_DS = 0 Charger on LB comp on Buck1 on Buck2 on LDO1 on LDO2 off LDO3 on LDO4 off LDO5 off SYSOUT on When LDO3 AND Buck2 reach 90% regulation, the PMU will turn on LDO1. User presses pushbutton connected to PWR_ON (or EXT_ON) pin for > 320ms (PWR_ON = H). PMU looks at PWR_DS bit. Because PWR_DS=1,PMU will begin Startup sequence starting with LDO3 and Buck2. Charger on LB comp on PMU will force PWR_DS to 0. Figure 5: Normal Mode Deep-Sleep Mode Normal Mode Flowchart. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 31 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface Normal Mode Buck1 on If a trigger event occurs, SOC pulls down PWR_EN which turns off Buck2, LDO2, LDO4, and LDO5 simultaneously. Buck2 on Sleep Mode Buck1 on Buck2 off LDO1 on LDO1 on LDO2 on LDO2 off LDO3 on LDO3 on LDO4 on LDO5 on SYSOUT on If a trigger event occurs, PWR_EN is asserted to turn on Buck2, LDO2, LDO4, and LDO5 simultaneously. LDO4 off LDO5 off SYSOUT on Charger on Charger on LB comp on LB comp on Figure 6: Normal Mode Sleep Mode Flowchart. Shutdown DS_RDY = 0 PWR_DS = 0 Startup DS_RDY = 0 PWR_DS = 0 PWR_HOLD is maintained high Buck1 off Buck2 off Buck1 on LDO1 off Buck2 on LDO2 off LDO3 off LDO4 off LDO5 off SYSOUT off Charger off User presses pushbutton connected to PWR_ON pin for >320ms. (PWR_ON = H) When LDO3 PMU begins AND Buck2 Startup sequence reach 90% starting with LDO3 regulation, PMU and Buck2 will turn on LDO1 and Buck1 LB comp off LDO1 on LDO2 off LDO3 on LDO4 off LDO5 off SYSOUT on Charger on LB comp on If ADP and USB are removed and the BAT pin is < Low-Battery threshold, the PMU will automatically go back into Shutdown mode. All Regulators will be turned off simultaneously. All bucks will be in Hi-Z mode. Normal Mode DS_RDY = 0 PWR_DS = 0 Buck1 on Buck2 on LDO1 on SOC will pull up PWR_EN pin to turn on LDO2, LDO4, and LDO5 simultaneously. RESET is pulled high LDO2 on LDO3 on LDO4 on All LDOs will pull down their outputs. LDO5 on SYSOUT on Charger on LB comp on Figure 7: System Shutdown Normal Mode (Initial Start-Up) Flowchart. 32 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface I2C Serial Interface and Programmability Serial Interface Many of the features of the AAT3608 can be controlled via the I2C serial interface. The I2C serial interface is a widely used interface where it requires a master to initiate all the communications with the slave devices. The I2C protocol consists of 2 active wires, SDA (serial data line) and SCL (serial clock line). Both wires are open drain and require an external pull up resistor to VCC (SYSOUT may be used as VCC). The SDA pin serves I/O function, and the SCL pin controls and references the I2C bus. I2C protocol is a bidirectional bus which allows both read and write actions to take place. The timing diagram in Figure 8 depicts the transmission protocol. START and STOP Conditions START and STOP conditions are always generated by the master. Prior to initiating a START condition, both the SDA and SCL pin are idle mode (idle mode is when there is no activity on the bus and SDA and SCL are pulled to VCC via external resistor). As depicted in Figure 9, a START condition is defined to be when the master pulls the SDA line low and after a short period pulls the SCL line low. A START condition acts as a signal to all ICs that something is about to be transmitted on the BUS. A STOP condition, also shown in Figure 9, is when the master releases the bus and SCL changes from low to high followed by SDA low to high transition. The master does not issue an ACKNOWLEDGE and releases the SCL and SDA pins. MSB LSB R/W Figure 8: Bit Order. Acknowledge Bit The acknowledge bit is the ninth bit of data. It is used to send back a confirmation to the master that the data has been received properly. For acknowledge to take place, the MASTER must first release the SDA line, then the SLAVE will pull the data line low as shown in Figure 9. The address is embedded in the first seven bits of the byte. The eighth bit is reserved for the direction of the information flow for the next byte of information. For the AAT3608, this bit must be set to “0” when writing and “1” when reading. The full 8-bit address including the R/W bit is 0x9C (hex) or 10011100 in binary for writing and 0x9D(hex) or 10011101 in binary for reading. I2C Write Code After sending the chip address, the master should send an 8-bit data stream (“2ND Word”). The “2ND Word” can consist of any one of the four sets of data listed in Table 3. The “3RD Word” should be entered into the I2C only if (Bit7,Bit6,Bit5) = (0,0,0) in the “2ND Word”. In this case, the bits (G2,G1,G0) are used to set the bit assignments as shown in Tables 4 and 5. Transferring Data Every byte on the bus must be 8 bits long. A byte is always sent with the most significant bit first (see Figure 8). Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 33 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface I2C Address START R/W A6 A5 A4 A3 A2 A1 0 ACK 9 0 2nd Word 0 0 0 0 0 1 x x G2 G1 G0 ACK G2:0=3'b000 D14 D13 D12 D11 D10 0 1 0 D24 D23 D22 D21 D20 0 1 1 D34 D33 D32 D31 D30 ACK 3rd Word 18 G2:0=3'b010 27 0 1 E15 E14 E13 E12 E11 E10 1 0 E25 E24 E23 E22 E21 E20 STOP 1 1 E35 E34 E33 E32 E31 E30 STOP 0 1 F15 F14 F13 F12 F11 F10 STOP STOP STOP SCL SDA A6 A5 A0 START command from the master. START W A 0 01 or 10 or 11 Dx4 Dx0 Write command Acknowledge from the master. from the slave. A Acknowledge from the slave. STOP STOP command from the master. D1<4:0> D2<4:0> D3<4:0> Data Data Data Data SCL E1<5:0> SDA E2<5:0> E3<5:0> F1<5:0> A<6: 0> I2C Controller Figure 9: I2C Protocol. Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 0 0 0 0 0 0 1 1 0 1 0 1 0 ENLDO5 LDO51 BUCK24 and LDO34 0 ENLDO4 LDO50 BUCK23 and LDO33 G2 DS_RDY LDO41 BUCK22 and LDO32 G1 PWR_DS LDO40 BUCK21 and LDO31 G0 Reserved ENCHG BUCK20 and LDO30 Table 3: I2C “2nd Word” Bit Assignments. 34 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 0 1 1 0 ENLDO3 PWR_IN IN Mask ENLDO2 PWR_IN OUT Mask ENLDO1 Reserved ENBUCK1 LBO Mask ENBUCK2 TIME OUT Mask PWR_EN Mask CHG DONE Mask Table 4: I2C “3rd Word” Bit Assignments for (G2,G1,G0) = (0,0,0) Bit7 Bit6 0 1 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 Test Modes Table 5: I2C “3rd Word” Bit Assignments for (G2,G1,G0) = (0,1,0). BUCK24 LDO34 BUCK23 LDO33 BUCK22 LDO32 BUCK21 LDO31 BUCK20 LDO30 LDO3 Output Voltage BUCK2 FB Voltage 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 X 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 X 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 X 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 1 X 1.000V 1.025V 1.050V 1.075V 1.100V 1.125V 1.150V 1.175V 1.200V (Default) 1.225V 1.250V 1.275V 1.300V 1.325V 1.350V 1.375V 1.400V 0.5000V 0.5125V 0.5250V 0.5375V 0.5500V 0.5625V 0.5750V 0.5875V 0.6000V (Default) 0.6125V 0.6250V 0.6375V 0.6500V 0.6625V 0.6750V 0.6875V 0.7000V Table 6: Buck2 and LDO3 Output Voltage. LDO41 LDO40 LDO4 Output Voltage LDO51 LDO50 LDO5 Output Voltage 0 0 1 1 0 1 0 1 1.8V 2.5V (Default) 2.85V 3.3V 0 0 1 1 0 1 0 1 1.2V 1.5V 3.0V 3.3V (Default) Table 7: LDO4 Output Voltage. Table 8: LDO5 Output Voltage. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 35 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface ENCHG Description DS_RDY Description 0 1 Turn off Battery Charger Turn on Battery Charger (Default) 0 1 (Default) Deep Sleep Recognition Flag ENBUCK1 Description PWR_DS Description 0 1 Turn off Buck1 Turn on Buck1 (Default) 0 1 (Default) Force PMU to go into Deep Sleep Mode ENBUCK2 Description PWR_EN Mask Description 0 1 Turn OFF Buck2 Turn ON Buck2 (Default) 0 1 No Masking Mask the PWR_EN pin ability to control BUCK2 (Default) ENLDO1 Description PWR_IN IN Mask Description 0 Turn OFF LDO1 0 1 Turn ON LDO1 (Default) 1 No Masking Prevent an interrupt from being generated if the PWR_IN IN bit has been asserted (Default) ENLDO2 Description PWR_IN OUT Mask Description 0 Turn OFF LDO2 Turn ON LDO2 only if PWR_EN pin is High (Default) 0 No Masking Prevent an interrupt from being generated if the PWR_IN OUT bit has been asserted (Default) ENLDO3 Description LBO Mask Description 0 Turn OFF LDO3 0 1 Turn ON LDO3 (Default) 1 No Masking Prevent an interrupt from being generated if the LBO comparator has been asserted (Default) ENLDO4 Description TIMEOUT Mask Description 0 Turn OFF LDO4 0 1 Turn ON LDO4 (Default) 1 No Masking Prevents an interrupt from being generated if the TIMEOUT bit has been asserted (Default) ENLDO5 Description CHG_DONE Mask Description 0 Turn OFF LDO5 0 1 Turn ON LDO5 (Default) 1 No Masking Prevent an interrupt from being generated if the charger has reached End-of-Charge (Default) 1 1 Table 9: Enable Settings. Interrupt (Read from I2C) The INT (interrupt) pin is an open drain output which pulls low when there is an assertion in any one of the status bits (except the DS_RDY and PWR_DS bits). When a Read from the I2C is initiated AND completed by the SOC, the INT pin is released and the voltage will go high through the external pull-up resistor. A single byte is used when reading I2C data from the AAT3608. The R/W address should be set to 1 so that complete address of the chip would be 0x9D or 10011101 in binary. Bit7 Bit6 Bit5 Bit4 PWR_IN IN PWR_IN OUT Reserved LBO Bit3 Bit2 Bit1 Bit0 TIME OUT CHG_DONE DS_RDY PWR_DS Table 10: I C Read Table. 2 36 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface PWR_IN IN Bit Description Interrupt Signal Produced? 0 1 Default If VPWR_IN > UVLO threshold, this bit will be set Only if PWR_IN IN Mask bit is not set PWR_IN OUT Bit Description Interrupt Signal Produced? 0 1 Default If VPWR_IN < UVLO threshold, this bit will be set Only if PWR_IN OUT Mask bit is not set TIMEOUT Bit Description Interrupt Signal Produced? 0 1 Default If the charger watchdog timer has reached Timeout, this bit will be set. Only if TIMEOUT Mask bit is not set LBO Bit Description Interrupt Signal Produced? 0 1 Default If Low-Battery comparator is tripped then this bit will be set. Only if LBO Mask bit is not set CHG DONE Bit Description Interrupt Signal Produced? 0 1 Default If the Charger has reached End-Of-Charge (EOC), this bit will be set Only if CHG_DONE Mask bit is not set DS_RDY Bit Description Interrupt Signal Produced? 0 1 Default Same as the DS_RDY bit described in the "I2C Write" section of this datasheet PWR_DS Bit Description 0 1 Default Same as the PWR_DS bit described in the "I2C Write" section of this datasheet No INT signal Interrupt Signal Produced? No INT signal Table 11: Status Bit Descriptions. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 37 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface Application Information Input Capacitor (Bucks) The two bucks are high performance 800mA 1.5MHz monolithic step-down converters. They have been designed with the goal of minimizing external component size and optimizing efficiency over the complete load range. Apart from the small bypass input capacitor, only a small L-C filter is required at the output. All input capacitors should be located as physically close to the power pin (INBUCK) and power ground pins (PGND1 and 2). Ceramic capacitors are recommended for their higher current operation and small profile. Also, ceramic capacitors are inherently capable to withstand input current surges from low impedance sources such as batteries in portable devices over tantalum capacitors. Typically, 10V or 16V rated capacitors are required. Both bucks can be programmed with external feedback resistors to any voltage, ranging from 0.6V to the input voltage in default feedback voltage condition. At dropout, the step down converters duty cycle increases to 100% and the output voltage tracks the input voltage minus the RDSON drop of the P-channel high-side MOSFET. Output Voltage Resistor Selection Resistors R2 through R5 in Figure 10 program the output to regulate at a voltage higher than 0.6V in default mode. The feedback voltage of Buck2 can have a wider range and can be adjusted down to 0.5V through I2C. To limit the bias current required for the external feedback resistor string while maintaining good noise immunity, a suggested value for R3 and R5 is 59kΩ to provide a bias current of 10uA with a feedback voltage of 0.6V. Although a larger value will further reduce quiescent current, it will also increase the impedance of the feedback node, making it more sensitive to external noise and interference. Table 12 summarizes the resistor values for various output voltages with R3 and R5 set to either 59kΩ for good noise immunity or 100kΩ for reduced no load input current. VOUT (V) R3 and R5 = 59kΩ R2 and R4 (kΩ) R3 and R5 = 100kΩ R2 and R4 (kΩ) 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5 1.8 1.85 2 2.5 3.3 19.6 29.4 39.2 49.9 59 68.1 78.7 88.7 118 124 137 187 267 33.2 49.9 66.5 82.5 100 118 133 150 200 210 232 316 453 Table 12: Feedback Resistors (Feedback Voltage = 0.6V). 38 The following are the typical recommended capacitance values: Two One One One One 10μF 10μF 10μF 10μF 10μF capacitors for INBUCK capacitor for INLDO capacitor for SYSOUT capacitor for PWR_IN capacitor for BAT Output Capacitor (Bucks) For proper load voltage regulation and operational stability, a capacitor is required on the output of each buck. The output capacitor connection to the ground pin should be made as directly as practically possible for maximum device performance. Since the bucks have been designed to function with very low ESR capacitors, a 4.7μF ceramic capacitor is recommended for best performance. Inductor Selection The two bucks use peak current mode control with slope compensation to maintain stability for duty cycles greater than 50%. The output inductor value must be selected so the inductor current down slope meets the internal slope compensation requirements. The internal slope compensation is 1A/μs. The inductor should be set equal to the output voltage numeric value in micro henries (μH). This guarantees that there is sufficient internal slope compensation. Inductor manufacturer’s specifications list both the inductor DC current rating, which is a thermal limitation, and the peak current rating, which is determined by the saturation characteristics. The inductor should not show any appreciable saturation under normal load conditions. Some inductors may meet the peak and average current ratings yet result in excessive losses due to a high DCR. Always consider the losses associated with the DCR and its effect on the total converter efficiency when selecting an inductor. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface Input Capacitor (LDOs) Layout Guidance Typically, a 10μF or larger capacitor, C4 (see Figure 10), is recommended as close as possible to the device INLDO pin. The input capacitor value of 10μF will offer superior input line transient response and will assist in maximizing the highest possible power supply ripple rejection. Figure 10 is the schematic for the evaluation board. The evaluation board has extra components for easy evaluation; the bill of materials for the system is shown in Table 12. When laying out the PC board, the following layout guidelines should be followed to ensure proper operation of the AAT3608: There is no specific capacitor ESR requirement; therefore ceramic, tantalum, or aluminum electrolytic capacitors may be selected for capacitor C4. However, ceramic capacitors are recommended due to their inherent capability over tantalum capacitors to withstand input current surges from low impedance sources such as batteries in portable devices. 1. The exposed pad (EP) must be reliably soldered to exposed copper pad on the board and electrically connected to GND/PGND pins. 2. The power traces, including GND traces, the LX traces and the VIN trace should be kept short, direct and wide to allow large current flow. Use several via pads when routing between layers. 3. The input capacitors should be connected as close as possible from SYSOUT and INBUCK to PGND1 and PGND2 to get good power filtering. 4. Keep the switching node LX away from the sensitive buck feedback nodes, FB1 and FB2. 5. The feedback trace for the bucks should be separate from any power trace and connected as closely as possible to the load point. Sensing along a high current load trace will degrade DC load regulation. 6. The output capacitors and inductors should be connected as close as possible and there should not be any signal lines under the inductor. 7. The resistance of the trace from the load return to PGND1 and PGND2 should be kept to a minimum. This will help to minimize any error in DC regulation due to differences in the potential of the internal signal ground and the power ground. Output Capacitor (LDOs) For proper load voltage regulation and operational stability, a 4.7µF ceramic capacitor is required between the output of the LDOs and GND. If desired, the output capacitor may be increased without limit. The output capacitor connection to the LDO regulator ground pin should be made as direct as practically possible for maximum device performance. Although the device is intended to operate with low ESR capacitors, it is stable over a very wide range of capacitor ESR, thus it will also work with higher ESR tantalum or aluminum electrolytic capacitors. However, for best performance, ceramic capacitors are recommended. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 39 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface J1 VIN C3 10µF VIN 1 2 TB-2 PWR_ID USBSEL S2 S1 PGND VBAT 1 2 EXT_ON TB-2 J5 PGND 18 19 EXT_ON 34 PWR_ON 33 PWR_HOLD 32 PWR_EN 20 30 31 TS GND GND GND J25 J24 J28 J29 GND PGND Star Ground is the Exposed Pad: Connect all Ground Planes at the Exposed Pad 29 U1 AAT3608 28 SDA SCL 3 TS 27 PBSTAS LX2 INT STAT FB2 LBO 15 LBI LBO 16 LBI 2 ISETA 4 TC C12 0.1µF 17 PGND1 26 RESET 3 PGND R3 100K L1 2.2µH LDO3 7 LDO4 10 R4 100K J8 LDO2 LDO3 LDO1 J9 LDO5 R15 2M S1 PWR_EN PWR_ID USBSEL S2 S1 12 11 10 9 8 7 J15 LBI LBI R16 1M C9 100pF TB4 TB-2 PGND2 LDO5 C17 4.7µF C16 4.7µF PGND1 PGND2 J13 VBAT R14 100K J16 LBO LBO PGND TS 1M 1M 1M 1M 1M PGND R20 1M J20 PBSTAS PBSTAS R21 100K R12 10K xRESET SYSOUT J19 PWR_HOLD 3 PGND D1 R19 1.5K LED2 VBAT J17 3-PIN_JUMPER SYSOUT J21 1 2 R7 R8 R9 R10 R11 SYSOUT PGND BUCK1 TS PGND SYSOUT SYSOUT J14 R13 10K R17 10K J18 STAT VIO R18 10K INT INT SCL STAT C19 100pF C18 100pF SDA P1 1 3 5 7 9 RESET Figure 10: AAT3608 Evaluation Board Schematic. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 2 4 6 8 10 Header 5X2 PGND 40 1 2 LDO4 J12 C15 4.7µF GND C10 J23 4.7µF PGND LDO3 J11 Buck 2 R5 100K LDO2 J10 LDO4 C13 4.7µF J6 BUCK2 LDO1 11 PGND1 PGND L2 2.2µH TB-2 VBAT SYSOUT SW DIP-6 LX2 GND C8 J22 4.7µF TB3 PWR_ON 3-PIN_JUMPER 1 2 3 4 5 6 PGND R2 316K P35,36 1 2 3 2 J27 C14 4.7µF PWR_ON J7 LX1 Buck 1 BUCK1 FB = 0.6V SW1 1 P24 8 5 22 SYSOUT C7 10µF 21 LDO2 LDO5 PGND2 P24 23 LDO1 GND P6,9 C6 10µF PGND PGND2 PGND1 PGND 13 RESET 14 1 C5 10µF J26 FB1 INT STAT VBAT 24 9 6 25 12 C4 10µF J3 J4 SYSOUT 36 35 LX1 PBSTAS R6 1.24K SYSOUT PGND 38 PWR_IN PWR_IN BAT BAT PWR_ID SYSOUT USBSEL SYSOUT S2 S1 INBUCK INLDO EXT_ON INLDO PWR_ON PWR_HOLD PWR_EN 37 40 SDA SCL 39 1 TB2 C2 10µF C1 0.1µF PGND VBAT 2 TB1 J2 VBAT VIN PGND PGND DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface Figure 11: AAT3608 Evaluation Board Silk Screen Layer. Figure 12: AAT3608 Evaluation Board Top Layer. Figure 13: AAT3608 Evaluation Board Mid Layer 1 (GND Plane). Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 41 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface Figure 14: AAT3608 Evaluation Board Figure 15: AAT3608 Evaluation Board Mid Layer 2 (SYSOUT). Bottom Layer. Description Quantity Footprint U1 J1, J2, J3, J4, J5, J6, J8, J9, J10, J11, J12, 13, J14,J15, J16, J18, J20, J21, J22, J23, J24, J25, J26, J27, J28, J29 Battery Charger PMU 1 TQFN55-40L Test Point 26 TP 4 TBLOK2 1 SW-2 1 3 1 2 1 6 1 2 6 3 4 1 1 1 5 1 7 HDR2X5 HDR1X3 DIP-12/SW CDRH4D16 1206LED - duplicate 0805 0805 0603 0603 0603 0603 0603 0603 0603 0603 0603 0603 TB1, TB2, TB3, TB4 SW1 P1 J7, J17, J19 S1 L1, L2 D1 C2, C3, C4, C5,C6,C7 C8 C1, C12 C10, C13, C14, C15, C16, C17 C9, C18, C19 R12, R13, R17, R18 R15 R19 R2 R3, R4, R5, R14, R21 R6 R7, R8, R9, R10, R11, R16, R20 Terminal Block Connector 2 Positions DigiKey 277-1273-ND Switch Tact, SPST, 5mm - C&K Components PTS645TL50 LFS Header, 5-Pin, Dual row 1X3 Header DIP Switch, 6 Position, SPST Inductor Typical red, green, yellow, amber GaAs LED Ceramic Capacitor Ceramic Capacitor Ceramic Capacitor Ceramic Capacitor Ceramic Capacitor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Value 2.2µH 10µF 4.7µF 0.1µF 4.7µF 100pF 10K 2M 1.5K 316K 100K 1.24K 1M Table 12: AAT3608 Evaluation Board Bill of Materials (BOM). 42 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface Ordering Information Package Marking1 Part Number (Tape and Reel)2, 3 TQFN55-40 C8XYY AAT3608IIC-1-T1 Skyworks Green™ products are compliant with all applicable legislation and are halogen-free. For additional information, refer to Skyworks Definition of Green™, document number SQ04-0074. Package Information TQFN55-404 Pin 1 Dot by Marking Pin 1 Identification Chamfer 0.300 x 45° 0.200 ± 0.050 0.400 BSC 3.600 ± 0.050 5.000 ± 0.050 0.380 ± 0.050 0.450 ± 0.050 5.000 ± 0.050 3.600 ± 0.050 Top View Bottom View 0.750 ± 0.050 0.203 REF + 0.100 0.000 - 0.000 Side View All dimensions in millimeters. 1. XYY = assembly and date code. 2. Sample stock is generally held on part numbers listed in BOLD. 3. Available exclusively outside of the United States and its territories. 4.The leadless package family, which includes QFN, TQFN, DFN, TDFN and STDFN, has exposed copper (unplated) at the end of the lead terminals due to the manufacturing process. A solder fillet at the exposed copper edge cannot be guaranteed and is not required to ensure a proper bottom solder connection. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012 43 DATA SHEET AAT3608 Compact Seven-Channel Regulator with Li+/Polymer Linear Battery Charger and I2C Interface Copyright © 2012 Skyworks Solutions, Inc. All Rights Reserved. Information in this document is provided in connection with Skyworks Solutions, Inc. (“Skyworks”) products or services. These materials, including the information contained herein, are provided by Skyworks as a service to its customers and may be used for informational purposes only by the customer. Skyworks assumes no responsibility for errors or omissions in these materials or the information contained herein. Skyworks may change its documentation, products, services, specifications or product descriptions at any time, without notice. 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Additional information, including relevant terms and conditions, posted at www.skyworksinc.com, are incorporated by reference. 44 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012