DATA SHEET AAT3351 High Efficiency 1x/1.5x Charge Pump General Description Features The AAT3351 is a low-noise, constant-frequency charge pump DC/DC converter that uses a dual-mode load switch (1x) and fractional (1.5x) charge pump to maximize efficiency for white LED applications. The AAT3351 is capable of driving 4 white LEDs at a total of 120mA from single 2.7V to 5.5V input. The current sinks may be operated individually or in parallel while driving highercurrent LEDs. A low external parts count (two 1µF flying capacitors and two small 1µF capacitors at VIN and VOUT) makes the AAT3351 ideal for small battery-powered applications. • • • • • • • • • Drives up to 4 LEDs at up to 30mA, each Automatic Switching Between 1x and 1.5x Modes 1MHz Switching Frequency Linear LED Output Current Control ▪ Single-wire, S2Cwire Interface ▪32-step ±10% LED Output Current Accuracy 3% LED Output Current Matching Low-Current Shutdown Mode Automatic Soft-Start TSOPJW-14 and TDFN33-12 Packages Skyworks' S2Cwire™ serial digital input is used to enable, disable, and set current to one of 32 levels for the LEDs. Applications The AAT3351 is equipped with built-in short-circuit protection. The soft-start circuitry prevents excessive inrush current at start-up and mode transitions. The AAT3351 family is available in Pb-free, space-saving TSOPJW and TDFN33 packages, and operates over the -40°C to +85°C ambient temperature range. • • • • • • Cellular and Smart Phones Digital Still and Video Cameras PDAs Portable Devices Portable Media Players Other White LED Backlighting Typical Application C1 1µF VBATTERY 3.6V C IN 1µF EN/SET S2Cwire Serial Control C1+ C2+ C1- C2- IN OUT C2 1µF C OUT 1µF AAT3351 D1 D2 D3 D4 D1 EN/SET D2 D3 D4 GND Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202166A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 12, 2012 1 DATA SHEET AAT3351 High Efficiency 1x/1.5x Charge Pump Pin Descriptions Pin Number TDFN33-12 TSOPJW-14 Name 1 2 D4 2 3 12 11 EN/SET C2- 4 10 C2+ 5 9 OUT 6 8 C1- 7 7 C1+ 8 6 IN 9 5 GND 10 4 D1 11 3 D2 12 1 D3 N/A EP 13, 14 N/A N/C EP Function Backlight LED 4 current sink. D4 controls the current through backlight LED 4. Connect the cathode of backlight LED 4 to D4. If not used, connect D4 to OUT. S2Cwire serial interface control pin. Negative terminal of charge pump capacitor 2. Positive terminal of charge pump capacitor 2. Connect the 1μF charge pump capacitor 2 from C2+ to C2-. Charge pump output. OUT is the output of the charge pump and supplies current to the backlight LEDs. Connect the backlight LED anodes to OUT. Bypass OUT to PGND with a 1μF or larger ceramic capacitor as close to the AAT3351 as possible. Negative terminal of charge pump capacitor 1. Positive terminal of charge pump capacitor 1. Connect the 1μF charge pump capacitor 1 from C1+ to C1-. Power input. Connect IN to the input source voltage. Bypass IN to GND with a 1μF or larger ceramic capacitor as close to the AAT3351 as possible. Ground pin. Backlight LED 1 current sink. D1 controls the current through backlight LED 1. Connect the cathode of backlight LED 1 to D1. If not used, connect D1 to OUT. Backlight LED 2 current sink. D2 controls the current through backlight LED 2. Connect the cathode of backlight LED 2 to D2. If not used, connect D2 to OUT. Backlight LED 3 current sink. D3 controls the current through backlight LED 3. Connect the cathode of backlight LED 3 to D3. If not used, connect D3 to OUT. Not connected. Exposed paddle (bottom). Connect to GND directly beneath package. Pin Configuration TSOPJW-14 (Top View) 2 D3 D4 D2 D1 GND IN C1+ 1 14 2 13 3 12 4 11 5 10 6 9 7 8 N/C N/C EN/SET C2C2+ OUT C1 TDFN33-12 (Top View) D4 EN/SET C2C2+ OUT C1- 1 12 2 11 3 10 4 9 5 8 6 7 D3 D2 D1 GND IN C1+ Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202166A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 12, 2012 DATA SHEET AAT3351 High Efficiency 1x/1.5x Charge Pump Absolute Maximum Ratings TA = 25°C unless otherwise noted. Symbol VIN VOUT VEN/SET VEN/SET(MAX) IOUT TJ Description Input Voltage Charge Pump Output EN/SET to GND Voltage Maximum VEN/SET to VIN Voltage (VEN/SET - VIN) Maximum DC Output Current Operating Junction Temperature Range Value Units -0.3 to 6 -0.3 to 6 -0.3 to 6 +0.3 150 -40 to 150 V V V V mA °C Value Units Thermal Information1 Symbol Description PD Maximum Power Dissipation1 θJA Maximum Thermal Resistance TDFN33-122 TSOPJW-143 TDFN33-12 TSOPJW-14 2000 625 50 160 mW °C/W 1. Mounted on 1.6mm thick FR4 circuit board. 2. Derate 25mW/°C above 25°C ambient temperature. 3. Derate 6.25mW/°C above 25°C ambient temperature. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202166A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 12, 2012 3 DATA SHEET AAT3351 High Efficiency 1x/1.5x Charge Pump Electrical Characteristics VIN = 3.6V; CIN = COUT = 1µF; C1 = C2 = 1µF; TA = -40°C to 85°C unless otherwise noted. Typical values are TA = 25°C. Symbol Description Input Power Supply VIN Input Voltage Range IIN Input Operating Current IIN(SHDN) VIN_(TH) LED Current ID_(MAX) ID_(DATA31) ΔI(D_X)/ID_AVG) VD_(TH) Shutdown Current Charge Pump Mode Hysteresis Sink Outputs D1-D4 Current Accuracy D1-D4 Current Accuracy D1-D4 Current Matching1 Hysteresis for Mode Change IOUT(MAX) Charge Pump Maximum Output Current fOSC Clock Frequency VD_(TH) Charge Pump Mode Transition Threshold tSS Charge Pump Startup Time EN/SET S2Cwire Control VENH EN/SET Input High Threshold Voltage VENL EN/SET Input Low Threshold Voltage IEN(LKG) EN Input Leakage Current tEN/SET(HI_MIN) EN/SET Minimum High Time tEN/SET(HI_MAX) EN/SET Maximum High Time tEN/SET(LOW) EN/SET Input Low Time t EN/SET(OFF) EN/SET Input OFF Timeout tEN/SET(LAT) EN/SET Input Latch Timeout3 Conditions Min -40°C ≤ TA ≤ 85°C 1x Mode, ID1 = ID2 = ID3 = ID4 = OFF EN/SET = IN 1.5x Mode, ID1 = ID2 = ID3 = ID4 = OFF EN/SET = GND 1x to 1.5x Transition at Any IDX 2.7 EN/SET = S2C DATA 1 EN/SET = S2C DATA 31 EN/SET = S2C DATA 1, ID1 = ID2 = ID3 = ID4 = 30mA ID1 = ID2 = ID3 = ID4 = 30mA, 1.5x to 1x Mode VIN = 3.0V, VF = 4.0V 27 Typ Max Units 5.5 V 2 4 6 7.2 µA V 33 mA mA ±3 0.15 % 0.25 150 1 0.15 150 EN/SET = IN; VIN - VF = 1V 1.4 EN/SET = IN = 5V 0.4 1 -1 50 0.3 75 75 500 500 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202166A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 12, 2012 V mA MHz V µs 1. LED current match is defined as 100 (IDX - IAVG)/IAVG. 2. 1x mode output impedance is defined as (VIN - VOUT)/IOUT. 3. If the part has been shut down, the latch time will be 500µs longer for soft start of charge pump. 4 1 0.15 30 0.5 mA V V µA ns µs µs µs µs DATA SHEET AAT3351 High Efficiency 1x/1.5x Charge Pump Typical Characteristics VIN = 3.6V, CIN = COUT = C1 = C2 = 1μF; TA = 25°C, unless otherwise noted. No Load Operating Current vs. Input Voltage (1x Mode) No Load Operating Current vs. Input Voltage (1.5x Mode) 2.5 8 2.45 7 2.4 6 IIN (mA) IIN (mA) 2.35 2.3 2.25 2.2 85°C 25°C 0°C -40°C 2.15 2.1 2.05 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5 4 3 85°C 25°C 0°C -40°C 2 1 0 5.5 2.7 3.1 3.5 Input Voltage (V) 4.7 0.60 100 Efficiency (%) 0.40 0.30 0.20 0.10 VF = 3.3V VF = 3.0V VF = 2.7V -15 10 35 60 85 85 70 55 40 2.7 3.1 Temperature (°C) 3.5 3.9 4.3 4.7 5.1 5.5 Input Voltage (V) 1.5x Output Voltage vs. Load Current 1.5x Mode Operating Characteristics (VIN = 3.3V; 30mA/ch Backlight, 1.5x Mode, COUT = 1µF) 5.5 VOUT (AC coupled) 0 (50mV/div) C1+ (2V/div) 5 4.5 4 VIN = 3.3V VIN = 3.6V VIN = 4.2V 3.5 3 5.5 (DATA = 1, 30mA/ch) 0.50 0.00 -40 5.1 Efficiency vs. Input Voltage (30mA/ch) Current Matching (%) 4.3 Input Voltage (V) Backlight Current Matching vs. Temperature Output Voltage (V) 3.9 0 50 100 Load Current (mA) 150 200 C2+ 0 (2V/div) 0 VIN (AC coupled) 0 (20mV/div) Time (1µs/div) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202166A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 12, 2012 5 DATA SHEET AAT3351 High Efficiency 1x/1.5x Charge Pump Typical Characteristics VIN = 3.6V, CIN = COUT = C1 = C2 = 1μF; TA = 25°C, unless otherwise noted. EN/SET Input Latch Timeout vs. Input Voltage EN/SET Input Off Timeout vs. Input Voltage 490 180 440 390 140 TEN/SET(OFF) (µs) TEN/SET(LAT) (µs) 160 120 100 80 -40°C 25°C 85°C 60 40 2.7 3.1 3.5 3.9 4.3 4.7 5.1 290 240 190 40 2.7 1.10 1.00 1.00 VENL (V) VENH (V) 1.10 0.90 0.80 -40°C 25°C 85°C 0.70 0.60 3.9 4.3 4.7 5.1 Input Voltage(V) 4.7 5.1 5.5 0.80 -40°C 25°C 85°C 0.70 0.60 5.5 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 Input Voltage (V) Turn-On to 1.5x Mode Backlight (VIN = 3.6V; 30mA/ch) (VIN = 3.3V; 30mA/ch) EN (2V/div) 0 EN (4V/div) VOUT (2V/div) 0 VOUT (4V/div) VBL 0 (2V/div) VBL (4V/div) 0 IIN (200mA/div) 0 IIN (400mA/div) 0 6 4.3 0.90 Turn-On to 1x Mode Backlight Time (100µs/div) 3.9 EN Input Low Threshold Voltage vs. Input Voltage 1.20 3.5 3.5 Input Voltage (V) 1.20 3.1 3.1 EN Input High Threshold Voltage vs. Input Voltage 2.7 -40°C 25°C 85°C 140 90 5.5 Input Voltage (V) 340 0 0 Time (40µs/div) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202166A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 12, 2012 DATA SHEET AAT3351 High Efficiency 1x/1.5x Charge Pump Typical Characteristics VIN = 3.6V, CIN = COUT = C1 = C2 = 1μF; TA = 25°C, unless otherwise noted. Turn-Off from 1.5x Mode Backlight (VIN = 3.3V; 30mA/ch) EN (2V/div) VOUT (4V/div) 0 0 VBL (4V/div) 0 IIN (200mA/div) 0 Time (20ms/div) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202166A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 12, 2012 7 DATA SHEET AAT3351 High Efficiency 1x/1.5x Charge Pump Functional Block Diagram IN C1+ C1C2+ Dual-mode Charge Pump 1x/1.5x OUT C24 EN/SET 32-step S2Cwire Backlight Control D1 D2 Control Logic D3 D4 GND Functional Description Application Information The AAT3351 is a high efficiency charge pump white LEDs driver for portable applications which can drive 4 channels at up to 30mA each. Current Level Settings The current sink magnitude is controlled by the EN/SET serial data S2Cwire interface. The interface records rising edges of the EN/SET pin and decodes them into 32 individual current level settings. LED Drivers The AAT3351 is a fractional charge pump and can multiply the input voltage by 1 or 1.5 times. The charge pump switches at a fixed frequency of 1MHz. The internalmode-selection-circuit automatically switches the mode between 1x and 1.5x mode based on the input voltage, LED forward voltage, and load current. This mode switching maximizes the efficiency throughout the entire load range. When the input voltage is high enough, the AAT3351 operates in 1x mode to provide maximum efficiency. If the input voltage drops too low to supply programmed LED current when the battery discharges and the voltage decays, 1.5x mode is automatically enabled. When the battery is connected to a charger and the input voltage increases sufficiently, the device will switch back to 1x mode. LED current level is set via Skyworks' Simple Serial Control (S2Cwire) interface in a linear scale. The LED current decreases linearly with each increasing code in steps of approximately 1mA as shown in Table 1 and Figure 1. S2Cwire Data LED Current (mA) S2Cwire Data LED Current (mA) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 30 29 28 27.1 26.1 25.2 24.2 23.2 22.3 21.3 20.3 19.4 18.4 17.4 16.5 15.5 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 14.5 13.5 12.6 11.6 10.6 9.7 8.7 7.7 6.8 5.8 4.8 3.9 2.9 1.9 1 0.5 Table 1: S2Cwire Data vs. LED Current. 8 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202166A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 12, 2012 DATA SHEET AAT3351 High Efficiency 1x/1.5x Charge Pump 35 LED Current (mA) 30 25 20 15 10 5 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 S2Cwire Data Figure 1: S2Cwire Data vs. LED Current. EN/SET Serial Interface edge of EN/SET enables the charge pump, which reaches full capacity after the soft-start time tSS. and initially sets the output LED current to full scale. Once EN/SET has been held in the logic high state for time tLAT, the programmed current is seen at the current sink outputs. The LED current magnitude is controlled by the EN/SET pin using the S2Cwire interface. The interface records rising edges of the EN/SET pin and decodes them into 32 individual current level settings. Code 1 is full scale, and Code 32 is the lowest setting equal to 500µA. The interface resets back to state 1 after the 32nd clock. The EN/ SET counter can be clocked at speeds up to 1MHz, so intermediate states are not visible, but is designed to accommodate a wide range of data rates. The first rising When EN/SET is held low for an amount of time greater than tOFF, the AAT3351 enters into shutdown mode and draws less than 1µA from IN. The internal data register is reset to 0 during shutdown. The EN/SET timing diagram is shown on Figure 2. THI TLO TOFF TLAT EN/SET 1 Data Reg 2 n-1 n <= 32 0 n 0 Figure 2: EN/SET Timing Diagram. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202166A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 12, 2012 9 DATA SHEET AAT3351 High Efficiency 1x/1.5x Charge Pump LED Selection and total energy usage...not just % efficiency. The AAT3351 is designed to drive white LEDs with forward voltages from 2V to 4.8V. Since D1 through D4 output current sinks are matched with negligible voltage dependence; the LED constant current and brightness will be matched regardless of their forward voltage (VF) levels. The AAT3351 efficiency may be quantified under specific conditions and is dependent upon the input voltage and voltage on D1 through D4 for a given constant current setting. Test Current/Channel Disable Each current sink channel is equipped with a test current function. While it is enabled, the AAT3351 automatically detects the presence of LEDs all the time. Unused channels that are tied to OUT or LED loads that are failed will be automatically disabled. Device Switching Noise Performance The AAT3351 operates at a fixed frequency of 1MHz to control noise and limit harmonics that can interfere with the RF operation of cellular telephone handsets or other communication devices. Noise injected back to the input pin of the charge pump is 20mV peak-to-peak, typically ten times less than inductor-based DC/DC boost converter white LED backlight solutions. The AAT3351 softstart feature prevents noise transient effects associated with inrush currents during startup of the charge pump circuit. Depending on the combination of VIN and voltages sensed at the current sinks D1-D4, the device will operate in 1X mode. When any one of the voltages sensed at the current sinks D1-D4 drops below the charge pump mode transient threshold, the device will operate in 1.5X charge pump mode. Each of these modes will yield different efficiency values. Refer to the following two sections for efficiency calculation of each mode. 1x Mode Efficiency The AAT3351's 1x mode is operational at all times and functions alone to enhance device power conversion efficiency when VIN is higher than the voltage across the load. When in 1x mode, voltage conversion efficiency is defined as output power divided by input power. An expression for the ideal efficiency (η) in 1x charge pump mode can be expressed as: η= -or- VF η (%) = 100 · V IN Power Efficiency and Device Evaluation The charge pump efficiency discussion in the following sections accounts only for efficiency of the charge pump section itself. Due to the unique circuit architecture and design of the AAT3351, it is very difficult to measure efficiency in terms of a percent value comparing input power over output power. Since the AAT3351 outputs are pure constant current sinks and typically drive individual loads, it is difficult to measure the output voltage for a given output to derive an overall output power measurement. For any given application, white LED forward voltage levels can differ, yet the output drive current will be maintained as a constant. This makes quantifying output power a difficult task when taken in the context of comparing to other white LED driver circuit topologies. A better way to quantify total device efficiency is to observe the total input power to the device for a given LED current drive level. The best white LED driver for a given application should be based on trade-offs of size, external components count, reliability, operating range, 10 POUT VF · IOUT V = ≈ F PIN VIN · IOUT VIN 1.5x Charge Pump Mode Efficiency The AAT3351 contains a fractional charge pump which will boost the input supply voltage when VIN is less than the voltage required to supply the output. The efficiency (η) can be simply defined as a linear voltage regulator with an effective output voltage that is equal to one and one half times the input voltage. Efficiency (η) for an ideal 1.5x charge pump can be calculated by the following equation: η= POUT VF · IOUT = PIN VIN · IOUT = VF · IOUT VF ≈ VIN · 1.5 · IOUT 1.5 · VIN -or- VF η (%) = 100 · 1.5 ·V IN Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202166A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 12, 2012 DATA SHEET AAT3351 High Efficiency 1x/1.5x Charge Pump Capacitor Selection Ceramic Capacitor Materials Careful selection of the four external capacitors CIN, C1, C2, and COUT is important because they will affect turn-on time, output ripple, and transient load performance. Optimum performance will be obtained when low equivalent series resistance (ESR) ceramic capacitors are used. In general, low ESR may be defined as less than 100mΩ. A value of 1μF for all four capacitors is a good starting point when choosing capacitors. If the LED current sinks are only programmed for low current levels, then the capacitor size may be decreased. Ceramic capacitors less than 0.1μF are typically made from NPO or C0G materials. NPO and C0G materials have tight tolerance and are stable over temperature. Capacitors with large values are typically composed of X7R, X5R, Z5U, or Y5V dielectric materials. Large ceramic capacitors, greater than 2.2μF, are often available in low-cost Y5V and Z5U dielectrics, but capacitors greater than 1μF are usually not required for AAT3351 applications. Capacitor area is another contributor to ESR. Capacitors that are physically larger will have lower ESR when compared to equivalent material but smaller capacitors. These larger devices can improve circuit transient response when compared to an equal value capacitor in a smaller size. Capacitor Characteristics Ceramic composition capacitors are highly recommended over all other types of capacitors for use with the AAT3351. Ceramic capacitors offer many advantages over their tantalum and aluminum electrolytic counterparts. A ceramic capacitor has very low ESR, is lowest cost, has a smaller PCB footprint, and is non-polarized. Low ESR ceramic capacitors help to maximize charge pump transient response. Since ceramic capacitors are non-polarized, they are not prone to incorrect connection damage. Evaluation Board Layout When designing a PCB for the AAT3351, the key requirements are: 1. Place two flying capacitors C1 and C2 as close to the chip as possible; otherwise 1.5x mode performance will be compromised. 2. Place input and output decoupling caps as close to the chip as possible to reduce switching noise and output ripple. Equivalent Series Resistance ESR is an important characteristic to consider when selecting a capacitor. ESR is a resistance internal to a capacitor that is caused by the leads, internal connections, size or area, material composition, and ambient temperature. Capacitor ESR is typically measured in milliohms for ceramic capacitors and can range to more than several ohms for tantalum or aluminum electrolytic capacitors. Manufacturer Murata AVX TDK Taiyo Yuden Part Number Value (μF) Voltage (V) Temperature Coefficient Case GRM219R71C104KA01 GRM188R61A105KA61 GRM219R61A475KE19 0603ZD105K C1608X5R1E105K C1608X5R1A475K LMK107BJ475KA 0.1 1 4.7 1 1 4.7 4.7 10 10 10 10 25 10 10 X7R X5R X5R X5R X5R X5R X5R 0805 0603 0805 0603 0603 0603 0603 Table 2: Surface Mount Capacitors. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202166A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 12, 2012 11 DATA SHEET AAT3351 High Efficiency 1x/1.5x Charge Pump Evaluation Board Schematic R12 0 J1 EN/SET C1- DC+ 1 DC- 2 C1 1µF 1 2 C1+ 3 4 5 3 C8 10µF 6 U1 COUT 1µF D3 D2 D1 GND VIN C2- 12 11 10 9 R9 0 8 7 R10 0 D1 R11 0 D2 EXP PAD 0 JP1 AAT3351IWP-T1 D4 EN/SET C1+ C1OUT C2+ C2+ CIN 1µF C2C2 1µF JP5 C6 4.7µF S2C R5 R4 R3 1K 1K 1K S1 UP S2 DOWN S3 CYCLE R2 20K 1 2 S1 S2 S3 3 4 U2 PIC12F675 VDD GP5 GP4 GP3 VSS GP0 GP1 GP2 C4 0.1µF 8 7 6 VR1 POT10K 5 R7 330 LED2 Red R6 330 GND LED1 Green Figure 3: AAT3351IWP Evaluation Board Schematic. 12 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202166A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 12, 2012 D3 D4 DATA SHEET AAT3351 High Efficiency 1x/1.5x Charge Pump 0 C1 1µF J1 DC+ DC- COUT 1µF 2 12 8 7 9 11 13 U1 AAT3351ITO-T1 D4 EN/SET C1C1+ OUT C2N/C D3 D2 D1 GND IN C2+ N/C R12 1 3 4 5 6 10 14 0 R9 0 R10 D1 0 R11 D2 D3 D4 V _MCU CIN 1µF C2 1µF EN AAT 3351 White LED Driver R2 20k R5 R4 1k 1k UP S1 DOWN S2 CYCLE S3 R3 1k 1 2 3 4 U2 VDD GP5 GP4 GP3 PIC12F675 VSS GP0 GP1 GP2 C4 R7 0.1µF 330 8 7 6 5 LED2 Red S2Cwire Microcontroller R6 330 LED1 Green Figure 4: AAT3351ITO Evaluation Board Schematic. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202166A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 12, 2012 13 DATA SHEET AAT3351 High Efficiency 1x/1.5x Charge Pump Evaluation Board Layout Figure 5: AAT3351IWP Evaluation Board Top Side Layout. 14 Figure 6: AAT3351IWP Evaluation Board Bottom Side Layout. Figure 7: AAT3351ITO Evaluation Board Top Side Layout. Figure 8: AAT3351ITO Evaluation Board Bottom Side Layout. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202166A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 12, 2012 DATA SHEET AAT3351 High Efficiency 1x/1.5x Charge Pump AAT3351 Evaluation Board Bill of Materials Component Part Number U1 AAT3351IWP-T1/AAT3351ITO-T1 U2 CIN, COUT, C1, C2 C4 C6 C8 D1-D4 LED1 LED2 R2 R3-R5 R6-R7 R8 R9-R12 S1, S2, S3 VR1 PIC12F675 GRM188R61A105KA61 GRM219R71C104KA01 GRM219R61A475KE19 DNP LW M673 21UGC/TR8 Green LED; 0805 21SRC/TR8 Red LED; 0805 Chip Resistor Chip Resistor Chip Resistor Chip Resistor Chip Resistor PTS645TL50 EVN-5ESX50B14 Description High Efficiency 1X/1.5X Charge Pump for White LED; TDFN33-12/TSOPJW-14 Package 8-Bit CMOS, FLASH-Based μC; 8-Pin MCU 1μF, 10V, X5R, 10%, 0603 0.1μF, 10V, X7R, 10%, 0805 4.7μF, 10V, X5R, 10%, 0805 Do Not Place Mini TOPLED White LED LED0 CMD15 LED7 CMD15 20K, 1/16W, 1%, 0603 1K, 1/16W, 1%, 0603 330, 1/16W, 1%, 0603 1M, 1/16W, 1%, 0603 0, 1/16W, 1%, 0603 Switch Tact, SPST, 5mm 10K POT; 3mm Squared SMD Manufacturer Skyworks Microchip Murata Murata Murata Osram Chicago Miniature Lamp Chicago Miniature Lamp Vishay Vishay Vishay Vishay Vishay ITT Industries Panasonic-ECG Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202166A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 12, 2012 15 DATA SHEET AAT3351 High Efficiency 1x/1.5x Charge Pump Ordering Information Package Marking1 Part Number(Tape & Reel)2 TSOPJW-14 TDFN33-12 8UXYY 5YXYY AAT3351ITO-T1 AAT3351IWP-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 Information3 TSOPJW-14 2.85 ± 0.20 2.40 ± 0.10 0.20 +- 0.10 0.05 0.40 BSC Top View 0.04 REF 0.05 +- 0.05 0.04 Side View 0.15 ± 0.05 + 0.05 1.05 - 0.00 + 0.000 1.00 - 0.075 3.05 +- 0.05 0.10 4° ± 4° 0.45 ± 0.15 2.75 ± 0.25 End View All dimensions in millimeters. 1. XYY = assembly and date code. 2. Sample stock is generally held on part numbers listed in BOLD. 3.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. 16 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202166A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 12, 2012 DATA SHEET AAT3351 High Efficiency 1x/1.5x Charge Pump TDFN33-12 Index Area 0.43 ± 0.05 0.1 REF C0.3 0.45 ± 0.05 2.40 ± 0.05 3.00 ± 0.05 Detail "A" 3.00 ± 0.05 1.70 ± 0.05 Top View Bottom View 0.23 ± 0.05 Pin 1 Indicator (optional) 0.05 ± 0.05 0.23 ± 0.05 0.75 ± 0.05 Detail "A" Side View All dimensions in millimeters. 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. Skyworks makes no commitment to update the materials or information and shall have no responsibility whatsoever for conflicts, incompatibilities, or other difficulties arising from any future changes. No license, whether express, implied, by estoppel or otherwise, is granted to any intellectual property rights by this document. Skyworks assumes no liability for any materials, products or information provided hereunder, including the sale, distribution, reproduction or use of Skyworks products, information or materials, except as may be provided in Skyworks Terms and Conditions of Sale. THE MATERIALS, PRODUCTS AND INFORMATION ARE PROVIDED “AS IS” WITHOUT WARRANTY OF ANY KIND, WHETHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, INCLUDING FITNESS FOR A PARTICULAR PURPOSE OR USE, MERCHANTABILITY, PERFORMANCE, QUALITY OR NON-INFRINGEMENT OF ANY INTELLECTUAL PROPERTY RIGHT; ALL SUCH WARRANTIES ARE HEREBY EXPRESSLY DISCLAIMED. SKYWORKS DOES NOT WARRANT THE ACCURACY OR COMPLETENESS OF THE INFORMATION, TEXT, GRAPHICS OR OTHER ITEMS CONTAINED WITHIN THESE MATERIALS. SKYWORKS SHALL NOT BE LIABLE FOR ANY DAMAGES, INCLUDING BUT NOT LIMITED TO ANY SPECIAL, INDIRECT, INCIDENTAL, STATUTORY, OR CONSEQUENTIAL DAMAGES, INCLUDING WITHOUT LIMITATION, LOST REVENUES OR LOST PROFITS THAT MAY RESULT FROM THE USE OF THE MATERIALS OR INFORMATION, WHETHER OR NOT THE RECIPIENT OF MATERIALS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. Skyworks products are not intended for use in medical, lifesaving or life-sustaining applications, or other equipment in which the failure of the Skyworks products could lead to personal injury, death, physical or environmental damage. Skyworks customers using or selling Skyworks products for use in such applications do so at their own risk and agree to fully indemnify Skyworks for any damages resulting from such improper use or sale. Customers are responsible for their products and applications using Skyworks products, which may deviate from published specifications as a result of design defects, errors, or operation of products outside of published parameters or design specifications. Customers should include design and operating safeguards to minimize these and other risks. Skyworks assumes no liability for applications assistance, customer product design, or damage to any equipment resulting from the use of Skyworks products outside of stated published specifications or parameters. Skyworks, the Skyworks symbol, and “Breakthrough Simplicity” are trademarks or registered trademarks of Skyworks Solutions, Inc., in the United States and other countries. Third-party brands and names are for identification purposes only, and are the property of their respective owners. Additional information, including relevant terms and conditions, posted at www.skyworksinc.com, are incorporated by reference. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202166A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 12, 2012 17