® RT5028B PMIC for Industrial Application General Description Features The RT5028B is a highly-integrated low-power highperformance analog SOC with PMIC in one single chip designed for Industrial applications. Input Voltage Operating Range is 3.3V to 5.5V Step-Down Regulator : VIN Range is 3.3V to 5.5V Max Current 2.5A/2.5A/1.6A/2A Programmable Frequency from 500kHz to 2MHz 2 I C Programmable Output Level 2 I C Programmable Operation Mode (Force PWM or Auto PSM/PWM) 2 I C Programmable Output Discharge Mode (Discharge or Flatting) Linear Regulators : VIN Range is 2.5V to 5.5V Max Current 0.3A 2 I C Programmable Output Level Embedded 32Bytes MTP for Factory Tuning External MTP Pin for Write Protection Sequence can be Controlled by I2C or Each EN Pins Defined by MASK_GPIO Pin OT/UVP/VIN LV/POWRON Press Time Interrupt (IRQ). 2 I C Control Interface : Support Fast Mode up to 400kb/s The RT5028B includes four synchronous step-down DC/ DC converters and eight LDOs for system power. The RT5028B also embeds one EEPROM (MTP) for setting sequence and timing etc. Additionally, the RT5028B PMIC also includes one IRQ report. Applications Industrial Ordering Information RT5028B Package Type QW : WQFN-56L 7x7 (W-Type) Lead Plating System G : Green (Halogen Free and Pb Free) Note : Richtek products are : RoHS compliant and compatible with the current require- Suitable for use in SnPb or Pb-free soldering processes. ments of IPC/JEDEC J-STD-020. Simplified Application Circuit VIN RT5028B VOUTLx VDDP SCL SDA IRQ VINL456 RESET VINL78 PWRHOLD PWRON LXBx REBOOT VOUTBxS MTP VINBx MASK_GPIO ENBx ENLx SADDR AGND VINL123 Copyright © 2016 Richtek Technology Corporation. All rights reserved. DS5028B-00 April 2016 is a registered trademark of Richtek Technology Corporation. www.richtek.com 1 RT5028B Marking Information Pin Configurations RT5028BGQW : Product Number (TOP VIEW) AGND ENL3 ENL2 ENL1 VIN VDDP VOUTB1S ENB1 LXB1 LXB1 VINB1 VINB1 VINB2 VINB2 RT5028B GQW YMDNN YMDNN : Date Code 56 55 54 53 52 51 50 49 48 47 46 45 44 43 VOUTL1 VINL123 VOUTL2 VOUTL3 VOUTL6 VOUTL5 VINL456 VOUTL4 VOUTL7 VINL78 VOUTL8 ENL4 ENL5 ENL6 1 42 2 41 3 40 4 39 5 38 37 6 7 36 AGND 8 35 34 9 33 10 57 11 32 31 12 13 30 14 29 LXB2 LXB2 ENB2 VOUTB2S VINB3 VINB3 LXB3 LXB3 AGND VOUTB3S VINB4 LXB4 ENB3 VOUTB4S SCL SDA ENL7 ENL8 IRQ RESET AGND PWRON REBOOT MTP MASK_GPIO PWRHOLD SADDR ENB4 15 16 17 18 19 20 21 22 23 24 25 26 27 28 WQFN-56L 7x7 Functional Pin Description Pin No. Pin Name Pin Function 1 VOUTL1 Output Voltage Regulation Node for LDO1. 2 VINL123 Input Power for LDO1, LDO2 and LDO3. 3 VOUTL2 Output Voltage Regulation Node for LDO2. 4 VOUTL3 Output Voltage Regulation Node for LDO3. 5 VOUTL6 Output Voltage Regulation Node for LDO6. 6 VOUTL5 Output Voltage Regulation Node for LDO5. 7 VINL456 Input Power for LDO4, LDO5 and LDO6. 8 VOUTL4 Output Voltage Regulation Node for LDO4. 9 VOUTL7 Output Voltage Regulation Node for LDO7. 10 VINL78 Input Power for LDO7 and LDO8. 11 VOUTL8 Output Voltage Regulation Node for LDO8. 12 ENL4 Enable Control Input for LDO4. Connect a 100k pull-low resistor. 13 ENL5 Enable Control Input for LDO5. Connect a 100k pull-low resistor. 14 ENL6 Enable Control Input for LDO6. Connect a 100k pull-low resistor. 15 SCL Clock Input for I2C. Open-drain output, connect a 10k pull-up resistor. Copyright © 2016 Richtek Technology Corporation. All rights reserved. www.richtek.com 2 is a registered trademark of Richtek Technology Corporation. DS5028B-00 April 2016 RT5028B Pin No. Pin Name Pin Function 2 16 SDA Data Input for I C. Open-drain output, connect a 10k pull-up resistor. 17 ENL7 Enable Control Input for LDO7. Connect a 100k pull-low resistor. 18 ENL8 Enable Control Input for LDO8. Connect a 100k pull-low resistor. 19 IRQ Open-Drain IRQ Output Node. 20 RESET Reset Output. 21, 34, 56, 57 AGND (Exposed Pad) Analog Ground. The exposed pad must be soldered to a large PCB and connected to AGND for maximum power dissipation. 22 PWRON Manual Power On. Connect a 100k pull-up resistor. 23 REBOOT System Power Reboot. Connect a 100k pull-low resistor. 24 MTP MTP Write Protection Pin. Connect a 100k pull-low resistor, logic low is inhibited and logic high is permit to write. 25 MASK_GPIO Select I2C or use EN pin for Bucks and LDOs. Connect a 100k pull-low resistor. As MASK_GPIO is high, ignore all EN pins. As MASK_GPIO is low, EN pins and I2C both can control. EN pins priority is higher than I2C. 26 PWRHOLD Power Hold Input. Connect a 100k pull-low resistor. 27 SADDR I2C Slave Address. Connect a 100k pull-low resistor. 28 ENB4 Enable Control Input for Buck4. Connect a 100k pull-low resistor. 29 VOUTB4S Output Voltage Regulation Node for Buck4. 30 ENB3 Enable Control Input for Buck3. Connect a 100k pull-low resistor. 31 LXB4 Internal Switch Node to Output Inductor Connection for Buck4. 32 VINB4 Input Power for Buck4. 33 VOUTB3S Output Voltage Regulation Node for Buck3. 35, 36 LXB3 Internal Switch Node to Output Inductor Connection for Buck3. 37, 38 VINB3 Input Power for Buck3. 39 VOUTB2S Output Voltage Regulation Node for Buck2. 40 ENB2 Enable Control Input for Buck2. Connect a 100k pull-low resistor. 41, 42 LXB2 Internal Switch Node to Output Inductor Connection for Buck2. 43, 44 VINB2 Input Power for Buck2. 45, 46 VINB1 Input Power for Buck1. 47, 48 LXB1 Internal Switch Node to Output Inductor Connection for Buck1. 49 ENB1 Enable Control Input for Buck1. Connect a 100k pull-low resistor. 50 VOUTB1S Output Voltage Regulation Node for Buck1 51 VDDP Internal Bias Regulator Voltage. External load on this pin is not allowed. 52 VIN Input Power for Analog Base. 53 ENL1 Enable Control Input for LDO1. Connect a 100k pull-low resistor. 54 ENL2 Enable Control Input for LDO2. Connect a 100k pull-low resistor. 55 ENL3 Enable Control Input for LDO3. Connect a 100k pull-low resistor. Copyright © 2016 Richtek Technology Corporation. All rights reserved. DS5028B-00 April 2016 is a registered trademark of Richtek Technology Corporation. www.richtek.com 3 RT5028B Functional Block Diagram VOUTL1 VINL123 LDO1 300mA VOUTL2 LDO2 300mA VOUTL3 LDO3 300mA VOUTL4 VINL456 LDO4 300mA VOUTL5 LDO5 300mA VIN VDDP Analog Base VINB1 Buck1 2.4A LXB1 GND VOUTB1S VINB2 VOUTL6 LDO6 300mA VOUTL7 VINL78 LDO7 300mA VOUTL8 LDO8 300mA Central Controller 2 I C Programmable Buck2 2A LXB2 GND VOUTB2S SDA VINB3 SCL IRQ Buck3 1.6A RESET LXB3 PWRHOLD REBOOT MTP GND State Machine MASK_GPIO VOUTB3S VINB4 SADDR PWRON ENB1 to ENB4 Buck4 2A LXB4 ENL1 to ENL8 AGND Copyright © 2016 Richtek Technology Corporation. All rights reserved. www.richtek.com 4 GND VOUTB4S is a registered trademark of Richtek Technology Corporation. DS5028B-00 April 2016 RT5028B Operation The RT5028B is a highly-integrated solution for industrial system including 4-CH step-down DC/DC converters and 8-CH LDOs. The RT5028B application mechanism will be introduced in later sections. The power-on and power-off sequences can be controlled by I2C or each EN pin and detected in MASK_GPIO pin. When the MASK_GPIO pin is at Hi level, the PMIC follows the power-on sequence to turn on channels. When the MASK_GPIO pin is at Lo level, the channels of PMIC will be controlled by the EN pin. Synchronous Step-Down DC/DC Converter Four current mode synchronous step-down DC/DC converters operate with internal power MOSFETs, FB resistors and compensation network. These channels are suitable for core power in industrial system. They can be operated at 100% maximum duty cycle to extend battery operating voltage range. When the input voltage is close to the output voltage, the converter enters low dropout mode with low output ripple. The operating frequency of step-down converter is adjustable from 500kHz to 2MHz and is controlled by I2C. Besides, the I2C interface also can be used to select different operation modes, On/Off Sequence, programmable the output voltage, RAMP control and discharge function. To enable AUTO Mode, it is used to improve the efficiency at light load. If the AUTO Mode is disabled, the converter operates in force PWM mode with fixed switching frequency. Over-Temperature Protection An Over-Temperature Protection (OTP) is contained in the device. The protection is triggered to force the device shutdown for protecting itself when the junction temperature exceeds 165°C typically. Once the junction temperature drops below the hysteresis 10°C typically, the device must be re-send PWRON to start system. Output Under-Voltage Protection The output under-voltage protection is implemented in order to prevent operation at low output voltage conditions. When the step-down DC/DC converters output voltage is lower than 1/2 x (VOUT), the UVP event triggers and PMIC turns off immediately. Linear Regulator Eight generic low voltage LDOs for multiple purpose power. The LDOs are stable over the entire operating load range with the use of external ceramic capacitors. The LDOs also have I2C programmable power on/off sequence and discharge function. The output voltage is adjustable by the I2C interface in the range of 1.6V to 3.6V. Copyright © 2016 Richtek Technology Corporation. All rights reserved. DS5028B-00 April 2016 is a registered trademark of Richtek Technology Corporation. www.richtek.com 5 RT5028B Absolute Maximum Ratings (Note 1) Analog Base Input Voltage, VIN ---------------------------------------------------------------------------------------PMIC Input Voltage, VINL123/456/78, VINB1/2/3/4 ---------------------------------------------------------------PMIC Output Voltage, VOUTLx, VOUTBxS, LXBx ----------------------------------------------------------------PMIC related Other Pins -------------------------------------------------------------------------------------------------Power Dissipation, PD @ TA = 25°C WQFN-56L 7x7 ------------------------------------------------------------------------------------------------------------Package Thermal Resistance (Note 2) WQFN-56L 7x7, θJA -------------------------------------------------------------------------------------------------------WQFN-56L 7x7, θJC ------------------------------------------------------------------------------------------------------Junction Temperature -----------------------------------------------------------------------------------------------------Lead Temperature (Soldering, 10 sec.) -------------------------------------------------------------------------------Storage Temperature Range --------------------------------------------------------------------------------------------ESD Susceptibility (Note 3) HBM (Human Body Model) ----------------------------------------------------------------------------------------------MM (Machine Model) ------------------------------------------------------------------------------------------------------ Recommended Operating Conditions −0.3V to 6V −0.3V to 6V −0.3V to 6V −0.3V to 6V 3.7W 27°C/W 7°C/W 150°C 260°C −65°C to 150°C 2kV 200V (Note 4) Junction Temperature Range --------------------------------------------------------------------------------------------- −40°C to 125°C Ambient Temperature Range --------------------------------------------------------------------------------------------- −40°C to 85°C Electrical Characteristics (Note 5) Parameter Symbol Test Conditions Min Typ Max Unit 3.3 -- 5.5 V VIN = 5V, LDOs, Bucks are ON with No Load. 300 450 600 A VIN = 5V, LDOs, Bucks are OFF. SCL = SDA = 0V 5 20 40 A Temperature 1 -- 100 -- Temperature 2 -- 125 -- -- 165 -- C -- 10 -- C 70 115 160 k As f SW > 1MHz, 3.3V VIN 5.5V. If f SW 1MHz, VIN 4V. Operation Voltage of VIN PMIC Quiescent Current IIN Warning for Die Temperature OTW Over-Temperature Protection OTP OTP and Warning Hysteresis Input Pull-low 100k Resistor RLow VIN = 5V Copyright © 2016 Richtek Technology Corporation. All rights reserved. www.richtek.com 6 C is a registered trademark of Richtek Technology Corporation. DS5028B-00 April 2016 RT5028B Parameter Symbol Test Conditions Min Typ Max Unit 3.3 -- 5.5 V Buck1 I C Programmable per step 25mV 0.7 -- 1.8 Buck2 I2C Programmable per step 25mV 0.7 -- 1.8 Buck3 I C Programmable per step 50mV 0.7 -- 3.6 Buck4 I2C Programmable per step 50mV 0.7 -- 3.6 Buck1 to Buck4 Input Voltage VINB 2 Output Voltage VOUTB 2 V Consumption Current IVINB AUTO Mode IOUT = 0mA, Each Buck 10 20 40 A Output Voltage Accuracy VOUTAcc 3.1V < VIN < 5.5V, 1mA < IOUT < IMAX 3 -- 3 % Switching Frequency f SW I2C Programmable 0.43 -- 2 MHz 1MHz f SW 10 -- 10 f SW 1MHz 20 -- 20 Buck1 3.1 4.4 5.8 Buck2 3.1 4.4 5.8 Buck3 2.6 3.7 4.8 Buck4 2.8 4.1 5.3 VOUTB1S to VOUTB4S < 0.66 x (VOUT Target) 56 66 76 Buck1 2.5 -- -- Buck2 2.5 -- -- Buck3 1.6 -- -- Buck4 2.0 -- -- Switching Frequency Accuracy Peak Current Limit Under-Voltage Protection Maximum Output Current OCP UVP IMAX % A % A High-Side On-Resistance Rpon VIN = 3.7V 50 150 250 m Low-Side On-Resistance Rnon VIN = 3.7V 40 110 160 m 2.5 -- 5.5 V LDO1 to LDO8 Input Voltage for VINL123/456/78 VINL Output Voltage LDO123/78 VOUTL 3.1V VIN 5.5V, 50A IOUT IMAX 3 -- 3 % Output Voltage LDO456 VOUTL 3.1V VIN 5.5V, 50A IOUT IMAX 3 -- 3 % Output Current IOUT 300 -- -- mA Output Short Current Isht 330 450 600 mA Voltage Difference VIN VOUT 0.05 0.1 0.3 VIN > 2.5V 0.05 0.11 0.5 Supply Current ISS IOUT = 0mA 10 35 60 A Shutdown Current IOFF 0 1 2 A VIN > 3.1V Copyright © 2016 Richtek Technology Corporation. All rights reserved. DS5028B-00 April 2016 VIN = VSET, IOUT = IOUTMAX V is a registered trademark of Richtek Technology Corporation. www.richtek.com 7 RT5028B Parameter Symbol Test Conditions Min Typ Max Unit VOL -- -- 0.4 V High-Level VIH 1.5 -- -- Low-Level VIL -- -- 0.4 Control Input Pin Electrical Characteristics Voltage Output Low Input Voltage V Note 1. Stresses beyond those listed “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions may affect device reliability. Note 2. θJA is measured at TA = 25°C on a high effective thermal conductivity four-layer test board per JEDEC 51-7. θJC is measured at the exposed pad of the package. Note 3. Devices are ESD sensitive. Handling precaution is recommended. Note 4. The device is not guaranteed to function outside its operating conditions. Note 5. Limits apply to the recommended operating temperature range of −40°C to 85°C, unless otherwise noted. Minimum and maximum limits are verified through test, design, or statistical correlation. Typical values represent the most likely parametric norm at TA = 25°C, and are provided for reference purposes only. Unless otherwise stated the following conditions apply : VIN = 3.3V to 5.5V Copyright © 2016 Richtek Technology Corporation. All rights reserved. www.richtek.com 8 is a registered trademark of Richtek Technology Corporation. DS5028B-00 April 2016 RT5028B Typical Application Circuit 1µF 1µF 1µF 1µF 1µF 52 VIN RT5028B 51 VDDP 2 VINL123 7 VINL456 10 VINL78 VOUTL1 VOUTL2 VOUTL3 1 3 4 1µF 1µF 1µF 1µF VOUTL4 8 1µF VOUTL5 6 1µF 45, 46 VINB1 VOUTL6 5 10µF 2.2µH 47, 48 22µF 50 43, 44 VOUTL7 9 LXB1 VOUTB1S VOUTL8 11 VINB2 SCL 10µF SDA 2.2µH 22µF 41, 42 39 37, 38 LXB2 VOUTB2S VINB3 MTP MASK_GPIO 35, 36 22µF 33 32 SADDR LXB3 VOUTB3S PWRON VIN 1µF SADDR MASK_GPIOMTP 15 16 IRQ 19 20 RESET 26 PWRHOLD 23 REBOOT 10µF 2.2µH 1µF As SADDR connect to AGND slave address =0111111 As SADDR connect to VIN slave address =0110111 24 25 27 As MASK_GPIO connect to AGND EN pins can control. As MASK_GPIO connect to VIN Ignore all EN pins. 22 VINB4 10µF 2.2µH 31 22µF 29 AGND AP ENL1 to ENL8 ENB1 to ENB4 LXB4 VOUTB4S AGND 21, 34, 56, 57 (Exposed Pad) As MTP connect to AGND Inhibit to write MTP. As MTP connect to VIN Permit to write MTP. Suggested Components for Typical Application Circuit Description P/N Manufacture Inductor for Buck-2.2H LQH43PB2R2M26L Murata CIN for Buck-10F C1206X7R1E516DT Murata COUT for Buck-22F C1206X7R22E416DT Murata CIN/COUT for LDO-1F C0603X7R1E216DT Murata Copyright © 2016 Richtek Technology Corporation. All rights reserved. DS5028B-00 April 2016 is a registered trademark of Richtek Technology Corporation. www.richtek.com 9 RT5028B Typical Operating Characteristics CH1 Buck Efficiency vs. Output Current CH2 Buck Efficiency vs. Output Current 100 100 90 90 80 VIN VIN VIN VIN VIN VIN 70 60 50 40 = = = = = = 3.3V 3.6V 3.9V 4.2V 5V 5.5V Efficiency (%) Efficiency (%) 80 30 20 VIN VIN VIN VIN VIN VIN 70 60 50 40 = = = = = = 3.3V 3.6V 3.9V 4.2V 5V 5.5V 30 20 10 10 VOUT = 1.35V, L = 2.2μH, COUT = 10μF 0 VOUT = 1.5V, L = 2.2μH, COUT = 10μF 0 10 100 1000 10000 10 100 Output Current (mA) CH3 Buck Efficiency vs. Output Current 100 90 90 VIN VIN VIN VIN VIN VIN 80 70 60 50 40 3.3V 3.6V 3.9V 4.2V 5V 5.5V Efficiency (%) Efficiency (%) 80 = = = = = = 30 20 70 60 50 = = = = = = 3.6V 3.9V 4.2V 4.5V 5V 5.5V 40 30 20 10 10 VOUT = 1.2V, L = 2.2μH, COUT = 10μF 0 VOUT = 3.3V, L = 2.2μH, COUT = 10μF 0 10 100 1000 10000 10 Output Current (mA) 100 1000 10000 Output Current (mA) CH2 Buck Output Voltage vs. Output Current CH1 Buck Output Voltage vs. Output Current 1.39 1.53 1.37 1.36 = = = = = = 3.3V 3.6V 3.9V 4.2V 5V 5.5V 1.52 Output Voltage (V) VIN VIN VIN VIN VIN VIN 1.38 Output Voltage (V) 10000 CH4 Buck Efficiency vs. Output Current 100 VIN VIN VIN VIN VIN VIN 1000 Output Current (mA) 1.35 1.34 VIN VIN VIN VIN VIN VIN 1.51 1.50 = = = = = = 3.3V 3.6V 3.9V 4.2V 5V 5.5V 1.49 1.48 1.33 L = 2.2μH, COUT = 10μF 1.32 L = 2.2μH, COUT = 10μF 1.47 0 300 600 900 1200 1500 1800 2100 2400 Output Current (mA) Copyright © 2016 Richtek Technology Corporation. All rights reserved. www.richtek.com 10 0 500 1000 1500 2000 Output Current (A) is a registered trademark of Richtek Technology Corporation. DS5028B-00 April 2016 RT5028B CH4 Buck Output Voltage vs. Output Current CH3 Buck Output Voltage vs. Output Current 3.38 1.25 VIN VIN VIN VIN VIN VIN 3.33 1.23 VIN VIN VIN VIN VIN VIN 1.22 1.21 1.20 = = = = = = Output Voltage (V) Output Voltage (V) 1.24 3.3V 3.6V 3.9V 4.2V 5V 5.5V 1.19 3.28 = = = = = = 3.6V 3.9V 4.2V 4.5V 5V 5.5V 3.23 3.18 3.13 1.18 L = 2.2μH, COUT = 10μF L = 2.2μH, COUT = 10μF 3.08 1.17 0 200 400 600 800 0 1000 1200 1400 1600 500 Output Current (mA) 1000 1500 2000 Output Current (mA) CH1 Buck Output Voltage vs. Input Voltage CH2 Buck Output Voltage vs. Input Voltage 1.40 1.55 1.39 1.53 Output Voltage (V) Output Voltage (V) 1.38 1.37 1.36 1.35 IOUT = 0mA IOUT = 500mA IOUT = 1000mA IOUT = 1500mA IOUT = 2000mA IOUT = 2400mA 1.34 1.33 1.32 1.31 1.51 1.49 IOUT = 0mA IOUT = 500mA IOUT = 1000mA IOUT = 1500mA IOUT = 2000mA 1.47 L = 2.2μH, COUT = 10μF L = 2.2μH, COUT = 10μF 1.30 1.45 3.3 3.8 4.3 4.8 5.3 3.3 5.8 3.8 Input Voltage (V) 4.3 4.8 5.3 5.8 Input Voltage (V) CH4 Buck Output Voltage vs. Input Voltage CH3 Buck Output Voltage vs. Input Voltage 3.80 1.24 1.23 3.60 Output Voltage (V) Output Voltage (V) 1.22 1.21 1.20 1.19 IOUT = 0mA IOUT = 500mA IOUT = 1000mA IOUT = 1600mA 1.18 1.17 3.40 3.20 IOUT = 0mA IOUT = 500mA IOUT = 1000mA IOUT = 1500mA IOUT = 2000mA 3.00 2.80 1.16 2.60 1.15 L = 2.2μH, COUT = 10μF L = 2.2μH, COUT = 10μF 2.40 1.14 3.3 3.8 4.3 4.8 5.3 Input Voltage (V) Copyright © 2016 Richtek Technology Corporation. All rights reserved. DS5028B-00 April 2016 5.8 3.3 3.8 4.3 4.8 5.3 5.8 Input Voltage (V) is a registered trademark of Richtek Technology Corporation. www.richtek.com 11 RT5028B LDO2 Output Voltage vs. Output Current LDO5 Output Voltage vs. Output Current 3.32 1.790 3.30 VIN VIN VIN VIN VIN VIN 1.780 1.775 1.770 = = = = = = 2.5V 3V 3.6V 4.2V 5V 5.5V Output Voltage (V) Output Voltage (V) 1.785 1.765 1.760 3.28 VIN VIN VIN VIN VIN VIN 3.26 3.24 = = = = = = 3.3V 3.6V 3.9V 4.2V 5V 5.5V 3.22 1.755 COUT = 1μF COUT = 1μF 3.20 1.750 0 50 100 150 200 250 0 300 50 2.50 1.78 Output Voltage (V) Output Voltage (V) 1.78 2.48 2.44 2.42 = = = = = = 200 250 300 LDO2 Output Voltage vs. Input Voltage LDO7 Output Voltage vs. Output Current 2.52 VIN VIN VIN VIN VIN VIN 150 Output Current (mA) Output Current (mA) 2.46 100 2.5V 3V 3.6V 4.2V 5V 5.5V IOUT = 0mA 1.77 IOUT = 100mA 1.77 IOUT = 200mA 1.76 IOUT = 300mA 1.76 COUT = 1μF COUT = 1μF 1.75 2.40 0 50 100 150 200 250 2.5 300 3 3.5 4 4.5 5 5.5 Input Voltage (V) Output Current (mA) LDO5 Output Voltage vs. Input Voltage LDO7 Output Voltage vs. Input Voltage 2.50 3.50 3.45 2.48 Output Voltage (V) Output Voltage (V) 3.40 3.35 3.30 3.25 IOUT = 0mA IOUT = 100mA IOUT = 200mA IOUT = 300mA 3.20 3.15 2.46 IOUT = 0mA IOUT = 100mA IOUT = 200mA IOUT = 300mA 2.44 2.42 3.10 3.05 COUT = 1μF 3.00 COUT = 1μF 2.40 3.3 3.8 4.3 4.8 5.3 Input Voltage (V) Copyright © 2016 Richtek Technology Corporation. All rights reserved. www.richtek.com 12 5.8 2.5 3 3.5 4 4.5 5 5.5 Input Voltage (V) is a registered trademark of Richtek Technology Corporation. DS5028B-00 April 2016 RT5028B Application Information The RT5028B is a highly-integrated solution for industrial system including PMIC and memory system. The RT5028B application mechanism and I2C compatible interface are introduced in later sections. The system's slave address is 0110111 (As SADDR = high) or 0111111(As SADDR = low). PMIC - Power management system provides 8 low dropout linear regulator and 4 high efficiency synchronous stepdown DC/DC converters. Power-On and Power-Off sequences are control by PWRON and RESET input pins. Parameter Symbol Detail time sequence control is described in Power ON/ OFF diagram. The I2C interface can program individual regulator output voltage as well as on/off control and voltage setting. I2C Interface Timing Diagram The RT5028B acts as an I2C -bus slave. The I2C-bus master configures the settings for all function blocks by sending command bytes to the RT5028B via the 2-wire I2C-bus. The I2C timing diagrams are list in the following. Test Conditions Min Typ Max Unit SDA, SCLK Input High Level Threshold 0.7 x VDDA -- -- V SDA, SCLK Input Low Level Threshold -- -- 0.3 x VDDA V -- -- 400 kHz 2 I C Interface Electrical Characteristics SCLK Clock Rate f SCL Hold Time (Repeated) START Condition. After this period, the first clock pulse is generated tHD;STA 0.6 -- -- s LOW Period of the SCL Clock tLOW 1.3 -- -- s HIGH Period of the SCL Clock tHIGH 0.6 -- -- s Set-Up Time for a Repeated START Condition tSU;STA 0.6 -- -- s Data Hold Time tHD;DAT 0 -- 0.9 s Data Set-Up Time tSU;DAT 100 -- -- ns Set-Up Time for STOP Condition tSU;STO 0.6 -- Bus Free Time Between a STOP and START Condition tBUF 1.3 -- -- s Rise Time of Both SDA and SCL Signals tR 20 -- 300 ns Fall Time of Both SDA and SCL Signals tF 20 -- 300 ns 2 -- -- mA SDA and SCL Output Low Sink IOL Current SDA or SCL voltage = 0.4V Copyright © 2016 Richtek Technology Corporation. All rights reserved. DS5028B-00 April 2016 s is a registered trademark of Richtek Technology Corporation. www.richtek.com 13 RT5028B Read Function Reading One Indexed Byte of Data from RT (With 1-Byte) Acknowledge from RT S Slave Address Acknowledge from RT 0 A Acknowledge from RT Register Address R/W A Sr Acknowledge from Master Slave Address Repeated Start 1 A Data Byte A P A P R/W 1Byte Reading n Indexed Words of Data from RT (With N-Byte) Acknowledge from RT S Slave Address Acknowledge from RT 0 A Register Address R/W A Sr Slave Address Repeated Start Acknowledge from Master Data Byte Acknowledge from RT Data Byte 1st Byte A R/W Acknowledge from Master A 1 Acknowledge from Master A …… 2nd Byte Data Byte Acknowledge from Master A (n-1)th Byte Data Byte nth Byte Write Function Writing One Byte of Data to RT (With 1-Byte) Acknowledge from RT S Slave Address Acknowledge from RT 0 A Register Address Acknowledge from RT A Data Byte A P R/W 1Byte Writing n Bytes of Data to RT (With N-Byte) Acknowledge from RT S Slave Address Acknowledge from RT 0 A Register Address Acknowledge from RT A Data Byte Acknowledge from RT A Data Byte A … A P R/W 1st Byte 2nd Byte Acknowledge from RT Acknowledge from RT Data Byte (n-1)th Byte Copyright © 2016 Richtek Technology Corporation. All rights reserved. www.richtek.com 14 A Data Byte nth Byte is a registered trademark of Richtek Technology Corporation. DS5028B-00 April 2016 RT5028B PMIC Power Channels Control Methodology When VIN power Good or PWRON event occurs, the PMIC will follow the power on sequence to turn on channels. During normal operation, users can use the REBOOT pin to restart PMIC again. Another PWROFF event, OTP or UVP occurs, PMIC will execute the power off. In the RT5028B PMIC, the UVP event will be set out when the Buck1 to Buck4s' output voltage is lower than 1/2 x (VOUT). Power Off Edge trigger Edge trigger No No VIN Power Good PWRON Check Yes 1 2 (Internal I C) Yes Mask_GPIO 0 (External Enable Control) No External EN Check Power On Sequence Yes Yes Yes REBOOT Check REBOOT Check Normal Operation No No No OTP Check Yes UVP Check Yes PWROFF Check No Yes Power Off Copyright © 2016 Richtek Technology Corporation. All rights reserved. DS5028B-00 April 2016 is a registered trademark of Richtek Technology Corporation. www.richtek.com 15 RT5028B PMIC - POWER ON/OFF Setting The circuit setting for communication between RT5028B and AP is showed as below. VIN SADDR MASK_GPIOMTP SCL SDA AGND IRQ RESET PWRHOLD State Machine REBOOT MTP MASK_GPIO SADDR PWRON ENL1 to ENL8 ENB1 to ENB4 AP As SADDR connect ot AGND slave address =0111111 As SADDR connect ot VIN slave address =0110111 As MASK_GPIO connect ot AGND EN pins can control. As MASK_GPIO connect ot VIN Ignore all EN pins. As MTP connect ot AGND Inhibit to write MTP. As MTP connect ot VIN Permit to write MTP. Power Hold Function When the “PWRHOLD” signal does not come during THOLD time, the RT5028B will do shutdown sequence. If users want to disable power hold function, set “DisTHOLD” bit in I2C register 10 bit[0] to disable this function. In the timing diagram below, the “THOLD” and “RESET_DLY” can be set by MTP program. START_TIME PWRON BUCK1 …… BUCK4 LDO1 …… LDO8 RESET_DLY RESET PWRHOLD THOLD Always Low Copyright © 2016 Richtek Technology Corporation. All rights reserved. www.richtek.com 16 Turn off sequence : First-on-last-Off is a registered trademark of Richtek Technology Corporation. DS5028B-00 April 2016 RT5028B When AP sends the “PWRHOLD” signal during THOLD time, the RT5028B will keep power-on. START_TIME PWRON BUCK1 …… BUCK4 LDO1 …… LDO8 RESET_DLY THOLD RESET Low to High signal from AP. PWRHOLD Timing Based ON/OFF Sequence START_TIME Normal power on Normal power off SHDN_PRESS PWRON TSS BUCK1 TSS BUCK2 …… BUCK4 TSS TSS LDO1 ... …… LDO8 RESET_DLY RESET Copyright © 2016 Richtek Technology Corporation. All rights reserved. DS5028B-00 April 2016 is a registered trademark of Richtek Technology Corporation. www.richtek.com 17 RT5028B Level Based ON/OFF Sequence Normal power on START_TIME SHDN_PRESS Normal power off PWRON 8ms >80 % BUCK1 >80 % BUCK2 …… >80 % BUCK4 8ms >80 % LDO1 …… LDO8 RESET_DLY RESET Abnormal OFF START_TIME Normal power on IRQ Even Occur Abnormal power off PWRON IRQ SHDN_DLYTIME BUCK1 TSS BUCK2 …… BUCK4 TSS LDO1 …… LDO8 RESET_DLY RESET Copyright © 2016 Richtek Technology Corporation. All rights reserved. www.richtek.com 18 is a registered trademark of Richtek Technology Corporation. DS5028B-00 April 2016 RT5028B PMU On/Off Sequence Setting In the RT5028B, users can set the power on/off sequence and output voltage by I2C register 0x01 to 0x04 for Buck output voltage, 0x07 to 0x0E for LDO output voltage and 0x2C to 0X32 for startup sequence setting. In the table below, users must set one by one (continues number) and missing code is not allowed. If users miss sequence code, the RT5028B will wait for next channel and the IC will be hold in waiting status. Buck1 Buck2 Buck3 Buck4 LDO1 LDO2 LDO3 LDO4 LDO5 LDO6 LDO7 LDO8 Output Voltage Setting Startup Sequence Setting Buck1Output[5:0] Buck1_Seq[3:0] [000000] [0001] Buck2Output[5:0] Buck2_Seq[3:0] [101100] [0010] Buck3Output[5:0] Buck3_Seq[3:0] [000000] [0011] Buck4Output[5:0] Buck4_Seq[3:0] [101100] [0100] LDO1OUT[6:0] LDO1_Seq[3:0] [0000000] [0101] LDO2OUT[6:0] LDO2_Seq[3:0] [0101000] [0110] LDO3OUT[6:0] LDO3_Seq[3:0] [0000000] [0111] LDO4OUT[6:0] LDO4_Seq[3:0] [0101000] [1000] LDO5OUT[6:0] LDO5_Seq[3:0] [0000000] [1001] LDO6OUT[6:0] LDO6_Seq[3:0] [0101000] [1010] LDO7OUT[6:0] LDO7_Seq[3:0] [0000000] [1011] LDO8OUT[6:0] LDO8_Seq[3:0] [0101000] [1100] Startup Enable Method (Soft-Start Control) [10] Note : * Output Voltage Setting: fill relative binary code to set the output voltage. * Startup Sequence Setting : “0000” denotes no operation (disable). “0001” denotes first-startup. “1100 to 1111” denotes last-startup. If same number, it means startup at the same time. *Startup Enable Method : [01] to [11] : each startup enable interval time (1ms, 4ms, 8ms). [00] : start end voltage (the output voltage's 80%) Copyright © 2016 Richtek Technology Corporation. All rights reserved. DS5028B-00 April 2016 is a registered trademark of Richtek Technology Corporation. www.richtek.com 19 RT5028B Synchronous Step-Down DC/DC Converter REBOOT Function Four current mode synchronous step-down DC/DC converters operate with internal power MOSFETs and compensation network. These channels supply the power core chip of portable system. They can be operated at 100% maximum duty cycle to extend battery operating voltage range. When the input voltage is close to the output voltage, the converter enters low dropout mode with low output ripple. The operating frequency range of step-down converter is 0.5MHz to 2MHz. As the REBOOT pin is set from low to high, the REBOOT function will be active. The REBOOT's FSM is shown as below. It concludes 100ms de-bouncing time and delay1/ delay2 power off delay time. Four step-down converters have RAMP control function as the following diagram. Table 1. REBOOT Input Control Setting Description delayed2 delayed1 Action 00 : 100ms 01 : 500ms 10 : 1s 11 : 2s Default 10 10 delayed1 power-off then delayed2 power-on PMIC From “LOW“ to “HIGH” rising input into REBOOT pin with 100ms debouncing time DC/DC 1/2/3/4 Output Voltage4 DC/DC 1/2/3/4 Output Voltage2 Wait for delayed1 time DC/DC 1/2/3/4 Output Voltage1 Power off the PMIC DC/DC 1/2/3/4 Output Voltage3 Wait for delayed2 time Power on the PMIC IRQ Table We summarize all IRQ items in the register table. All IRQ_status registers are implemented as reset after read. If IRQ_enable bit is Low, the IRQ_status bit will not update status. IRQ_enable will mask IRQ_status to trigger IRQ_PMIC Low, so the system can decide which interrupt is necessary. Waveform - (when the other IRQ_status are low) Mask IRQ_Status IRQ_Enable_OVP OVP Reset after Read Reset after Read IRQ_Status_OVP IRQ_PMIC Waveform - (when the other IRQ_status are low) * OTW125/OTW100 means the 125°C/100°C pre-warming over temperature. It only change IRQ status bits and don't trigger IRQ pin. Copyright © 2016 Richtek Technology Corporation. All rights reserved. www.richtek.com 20 is a registered trademark of Richtek Technology Corporation. DS5028B-00 April 2016 RT5028B EEPROM (MTP) Control Flow Thermal Considerations The RT5028B embeds 32 bytes MTP memory, and it allows users to save some I2C register bank data to MTP. When the I2C register 0x3A Bit[0]/Bit[1] is wrote to “1”, the MTP Page1/Page2 will execute erase process firstly. For continuous operation, do not exceed absolute maximum junction temperature. The maximum power dissipation depends on the thermal resistance of the IC package, PCB layout, rate of surrounding airflow, and difference between junction and ambient temperature. The maximum power dissipation can be calculated by the following formula : Because the erase process will be done in every writing time, the MTP data will be missed. So it would be best for users to read data from MTP to I2C first before executing writing process. where TJ(MAX) is the maximum junction temperature, TA is the ambient temperature, and θJA is the junction to ambient thermal resistance. Page 1 writing follow : Set I2C Register 0x3A Bit[4] =1 Reading MTP process PMU will read MTP data to relative I2C register bank. Writing MTP process P D(MAX) = (125°C − 25°C) / (27°C/W) = 3.7W for WQFN-56L 7x7 package Page 2 writing follow : Set I2C Register 0x3A Bit[5] =1 Reading MTP process PMU will read MTP data to relative I2C register bank. Set I2C Register 0x3A Bit[1] Writing MTP process Maximum Power Dissipation (W)1 The maximum power dissipation depends on the operating ambient temperature for fixed T J(MAX) and thermal resistance, θJA. The derating curve in Figure 1 allows the designer to see the effect of rising ambient temperature on the maximum power dissipation. PMU will move relative I2C register bank data to MTP PMU will erase the MTP page2 data For recommended operating condition specifications, the maximum junction temperature is 125°C. The junction to ambient thermal resistance, θJA, is layout dependent. For WQFN-56L 7x7 package, the thermal resistance, θJA, is 27°C/W on a standard JEDEC 51-7 four-layer thermal test board. The maximum power dissipation at TA = 25°C can be calculated by the following formula : Set I2C Register 0x3A Bit[0] PMU will erase the MTP page1 data PD(MAX) = (TJ(MAX) − TA) / θJA 4.0 Four-Layer PCB 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 0 PMU will move relative I2C register bank data to MTP 25 50 75 100 125 Ambient Temperature (°C) Figure 1. Derating Curve of Maximum Power Dissipation Copyright © 2016 Richtek Technology Corporation. All rights reserved. DS5028B-00 April 2016 is a registered trademark of Richtek Technology Corporation. www.richtek.com 21 RT5028B Layout Consideration For the best performance of the RT5028B, the following PCB layout guidelines must be strictly followed. The switching node area connected to LX and inductor should be minimized for lower EMI. Connect the GND and Exposed Pad to a strong ground plane for maximum thermal dissipation and noise Place the input and output capacitors as close as possible to the input and output pins respectively for good filtering. protection. Keep the main power traces as wide and short as possible. Directly connect the output capacitors to the feedback network of each channel to avoid bouncing caused by parasitic resistance and inductance from the PCB trace. VOUTB1 GND GND LX should be connected to Inductor by wide and short trace, keep sensitive compontents away from this trace. 48 47 VINB2 49 VIN 50 VINB2 VIN 51 VINB1 LXB1 52 VINB1 LXB1 53 ENB1 54 VOUTB1S ENL1 55 VIN VIN ENL2 56 VDDP AGND ENL3 Input/Output capacitors must be placed as close as possible to the Input/Output pins. 46 45 44 43 VOUTL1 1 42 LXB2 VIN VINL123 2 41 LXB2 VOUTB2 GND 40 ENB2 GND VOUTL2 3 VOUTL3 4 39 VOUTB2S VOUTL6 5 38 VINB3 VOUTL5 6 37 VINB3 VIN GND 36 LXB3 VIN VINL456 7 VOUTB3 VOUTL4 8 VOUTL7 9 35 LXB3 GND 34 AGND GND 33 VOUTB3S VIN VINL78 10 10 VOUTL8 11 32 VINB4 VIN GND 31 LXB4 ENL4 12 ENL5 13 GND VOUTB4 30 ENB3 GND 29 VOUTB4S SCL ENL7 ENL8 IRQ /RESET AGND 22 23 24 25 26 27 28 ENB4 21 SADDR 20 PWRHOLD 19 MTP 18 MASK_GPIO 17 PWRON 16 REBOOT 15 SDA ENL6 14 GND Connect the Exposed Pad to a ground plane. GND Figure 2. PCB Layout Guide Copyright © 2016 Richtek Technology Corporation. All rights reserved. www.richtek.com 22 is a registered trademark of Richtek Technology Corporation. DS5028B-00 April 2016 RT5028B Table 2. I2C Register Table Detail Description Address 00 Bit Device ID Name Description Read/Write Reset Value [7:4] VENDOR_ID Vendor Identification : Richtek : 1000b R 1000 [3:0] CHIP_REV Chip Revision R 0001 Address 01 Bit BUCKcontrol1 Name Description R/W Reset Value [7:2] Buck1Output[5:0] Buck1 output voltage regulation 000000 : 0.7V, 25mV per step 000001 : 0.725V … 101100 : 1.8V … 111111 : 1.8V R/W Option [1:0] Buck1VRC VRC setting 00 : 25mV/10s, 01 : 50mV/10s, 10 : 100mV/10s, 11 : 200mV/10s R/W Option Address 02 Bit BUCKcontrol2 Name Description [7:2] Buck2Output[5:0] Buck2 output voltage regulation 000000 : 0.7V, 25mV per step 000001 : 0.725V … 101100 : 1.8V … 111111 : 1.8V [1:0] Buck2VRC VRC setting 00 : 25mV/10s, 01 : 50mV/10s, 10 : 100mV/10s, 11 : 200mV/10s Address 03 Bit R/W Reset Value R/W Option R/W Option BUCKcontrol3 Name Description R/W Reset Value [7:2] Buck3Output[5:0] Buck3 output voltage regulation 000000 : 0.7V, 50mV per step 000001 : 0.75V … 111010 : 3.6V … 111111 : 3.6V R/W Option [1:0] Buck3VRC VRC setting 00 : 50mV/10s, 01 : 100mV/10s, 10 : 200mV/10s, 11 : 400mV/10s R/W Option Copyright © 2016 Richtek Technology Corporation. All rights reserved. DS5028B-00 April 2016 is a registered trademark of Richtek Technology Corporation. www.richtek.com 23 RT5028B Address 04 Bit BUCKcontrol4 Name Description R/W Reset Value R/W Option R/W Option Description R/W Reset Value Buck1VRC_EN Buck1 VRC 0 : disable - voltage ramps up to target voltage with one time 1 : enable - voltage ramps up to target voltage with slope control R/W Option Buck2VRC_EN Buck2 VRC 0 - disable - voltage ramps up to target voltage with one time 1 - enable - voltage ramps up to target voltage with slope control R/W Option Buck3VRC_EN Buck3 VRC 0 : disable - voltage ramps up to target voltage with one time 1 : enable - voltage ramps up to target voltage with slope control R/W Option Buck4VRC_EN Buck4 VRC 0 : disable - voltage ramps up to target voltage with one time 1 : enable - voltage ramps up to target voltage with slope control R/W Option R/W 0000 R/W Reset Value [7:2] Buck4Output[5:0] Buck4 output voltage regulation 000000 : 0.7V, 50mV per step 000001 : 0.75V … 111010 : 3.6V … 111111 : 3.6V [1:0] Buck4VRC VRC setting 00 : 50mV/10s, 01 : 100mV/10s, 10 : 200mV/10s, 11 : 400mV/10s Address 05 Bit 7 6 5 4 [3:0] VRC Control Name Reserved Address 06 Bit BUCK Mode Name Description 7 Buck1mode Buck1 mode 0 : Force PWM 1 : Auto Mode (PSM/PWM) R/W 1 6 Buck2mode Buck2 mode 0 : Force PWM 1 : Auto Mode (PSM/PWM) R/W 1 5 Buck3mode Buck3 mode 0 : Force PWM 1 : Auto Mode (PSM/PWM) R/W 1 Copyright © 2016 Richtek Technology Corporation. All rights reserved. www.richtek.com 24 is a registered trademark of Richtek Technology Corporation. DS5028B-00 April 2016 RT5028B 4 Buck4mode Buck4 mode 0 : Force PWM 1 : Auto Mode (PSM/PWM) R/W 1 3 Buck1oms Buck1 output off mode state 0 : floating 1 : Ground-discharged R/W 1 2 Buck2oms Buck2 output off mode state 0 : floating 1 : Ground-discharged R/W 1 1 Buck3oms Buck3 output off mode state 0 : floating 1 : Ground-discharged R/W 1 0 Buck4oms Buck4 output off mode state 0 : floating 1 : Ground-discharged R/W 1 R/W Reset Value R/W 0 R/W Option R/W Reset Value R/W 0 R/W Option R/W Reset Value R/W 0 R/W Option Address 07 Bit 7 [6:0] Name 7 [6:0] LDO1OUT[6:0] Name 7 [6:0] LDO1 output voltage regulation 0000000 : 1.6V, 25mV per step 0000001 : 1.625V ... 0101000 : 3.6V (MAX) … 1111111 : 3.6V (MAX) LDOcontrol2 Description Reserved LDO2OUT[6:0] Address 09 Bit Description Reserved Address 08 Bit LDOcontrol1 Name LDO2 output voltage regulation 0000000 : 1.6V, 25mV per step 0000001 : 1.625V ... 0101000 : 3.6V (MAX) … 1111111 : 3.6V (MAX) LDOcontrol3 Description Reserved LDO3OUT[6:0] LDO3 output voltage regulation 0000000 : 1.6V, 25mV per step 0000001 : 1.625V ... 0101000 : 3.6V (MAX) … 1111111 : 3.6V (MAX) Copyright © 2016 Richtek Technology Corporation. All rights reserved. DS5028B-00 April 2016 is a registered trademark of Richtek Technology Corporation. www.richtek.com 25 RT5028B Address 0A Bit 7 [6:0] Name 7 [6:0] LDO4OUT[6:0] Name 7 [6:0] LDO5OUT[6:0] Name LDO6OUT[6:0] 7 [6:0] Name Description LDO5 output voltage regulation 0000000 : 3V, 25mV per step 0000001 : 3.025V ... 0011000 : 3.6V (MAX) … 1111111 : 3.6V (MAX) Description LDO6 output voltage regulation 0000000 : 3.0V, 25mV per step 0000001 : 3.025V ... 0011000 : 3.6V (MAX) … 1111111 : 3.6V (MAX) R/W 0 R/W Option R/W Reset Value R/W 0 R/W Option R/W Reset Value R/W 0 R/W Option R/W Reset Value R/W 0 R/W Option LDOcontrol7 Description LDO7output voltage regulation 0000000 : 1.6V, 25mV per step 0000001 : 1.625V ... 0101000 : 3.6V (MAX) … 1111111 : 3.6V (MAX) Copyright © 2016 Richtek Technology Corporation. All rights reserved. www.richtek.com 26 Reset Value LDOcontrol6 Reserved LDO7UT[6:0] R/W LDOcontrol5 Reserved Address 0D Bit LDO4 output voltage regulation 0000000 : 3 V, 25mV per step 0000001 : 3.025V ... 0011000 : 3.6V (MAX) … 1111111 : 3.6V (MAX) Reserved Address 0C Bit Description Reserved Address 0B Bit LDOcontrol4 is a registered trademark of Richtek Technology Corporation. DS5028B-00 April 2016 RT5028B Address 0E Bit 7 [6:0] Name LDO8T[6:0] Name 7 LDO8oms 6 LDO7oms 5 LDO6oms 4 LDO5oms 3 LDO4oms 2 LDO3oms 1 LDO2oms 0 LDO1ms Address 10 Bit Description Reserved Address 0F Bit LDOcontrol8 LDO8utput voltage regulation 0000000 : 1.6V, 25mV per step 0000001 : 1.625V ... 0101000 : 3.6V (MAX) … 1111111 : 3.6V (MAX) R/W Reset Value R/W 0 R/W Option R/W Reset Value R/W 1 R/W 1 R/W 1 R/W 1 R/W 1 R/W 1 R/W 1 R/W 1 LDOs off mode state Description LDO8 output off mode state 0 : floating 1 : Ground-discharged LDO7 output off mode state 0 : floating 1 : Ground-discharged LDO6 output off mode state 0 : floating 1 : Ground-discharged LDO5 output off mode state 0 : floating 1 : Ground-discharged LDO4 output off mode state 0 : floating 1 : Ground-discharged LDO3 output off mode state 0 : floating 1 : Ground-discharged LDO2 output off mode state 0 : floating 1 : Ground-discharged LDO1output off mode state 0 : floating 1 : Ground-discharged REBOOT/PWRHOLD delay time control Name Description R/W Reset Value [7:6] Delayed2[1:0] Delayed2 setting (00 : 100ms/01 : 500ms/10 : 1s/11 : 2s) R/W Option [5:4] Delayed1[1:0] Delayed1 setting (00 : 100ms/01 : 500ms/10 : 1s/11 : 2s) R/W Option [3:2] THOLD[1:0] THOLD setting (00 : 100ms/01 : 500ms/10 : 1s/11 : 2s) R/W Option R/W 0 R/W Option 1 Reserved 0 DisTHOLD Ignore THOLD Time. 0 : Keep PWRHOLD function. 1 : Ignore PWRHOLD function. Copyright © 2016 Richtek Technology Corporation. All rights reserved. DS5028B-00 April 2016 is a registered trademark of Richtek Technology Corporation. www.richtek.com 27 RT5028B Address 11 Bit ON Event Setting Name Description [7:5] On_Event Powered on because of 000 : PWRON key-pressed 001 : VIN plugged in 010 : from REBOOT pin event 111 : No event happen [4:0] Reserved Address 12 Bit [7:5] Name VOFF setting R/W Reset Value R 111 R/W 0 R/W Reset Value R/W Option R/W 0 VIN UVLO/Buck On/Off Description VIN UVLO 2.8V to 3.5V per 0.1V to power off PMIC 000 : 2.8V 001 : 2.9V 010 : 3V 011 : 3.1V (Default) 100 : 3.2V 101 : 3.3V 110 : 3.4V 111 : 3.5V 4 Reserved 3 Buck4 Buck4 control (0 : Disable Buck4/1 : Enable Buck4) R/W Option 2 Buck3 Buck3 control (0 : Disable Buck3/1 : Enable Buck3) R/W Option 1 Buck2 Buck2 control (0 : Disable Buck2/1 : Enable Buck2) R/W Option 0 Buck1 Buck1 control (0 : Disable Buck1/1 : Enable Buck1) R/W Option Address 13 LDOs On/Off Bit Name Description R/W Reset Value 7 LDO8 LDO8 control (0 : Disable LDO8 / 1 : Enable LDO8) R/W Option 6 LDO7 LDO7 control (0 : Disable LDO7 / 1 : Enable LDO7) R/W Option 5 LDO6 LDO6 control (0 : Disable LDO6 / 1 : Enable LDO6) R/W Option 4 LDO5 LDO5 control (0 : Disable LDO5 / 1 : Enable LDO5) R/W Option 3 LDO4 LDO4 control (0 : Disable LDO4 / 1 : Enable LDO4) R/W Option 2 LDO3 LDO3 control (0 : Disable LDO3 / 1 : Enable LDO3) R/W Option 1 LDO2 LDO2 control (0 : Disable LDO2 / 1 : Enable LDO2) R/W Option 0 LDO1 LDO1 control (0 : Disable LDO1 / 1 : Enable LDO1) R/W Option Copyright © 2016 Richtek Technology Corporation. All rights reserved. www.richtek.com 28 is a registered trademark of Richtek Technology Corporation. DS5028B-00 April 2016 RT5028B Address 14 Bit Name [7:6] START_TIME [5:4] L_PRESS_TIME [3:2] SHDN_PRESS [1:0] RESET_DLY Address 15 Bit PWRON(Power On Key) time Parameters Setting / RESET delay Description Startup time setting 00 : 100s (pressing time - low level) 01 : 100ms 10 : 1s 11 : 2s Long-press time setting (after Power-On, 00 : 1s (falling edge to rising edge) 01 : 1.5s 10 : 2s 11 : 2.5s Sending short/long-press IRQ to CPU ex :1.5s => low time < 1.5s (short IRQ) => low time > 1.5s but < 6s(shutdown time) (long IRQ) => low time > 6s(shutdown time) (shutdown) Key-press forced shutdown time setting 00 : 4s (pressing time : low level) 01 : 6s 10 : 8s 11 : 10s RESET signal delay after the last power startup is done 00 : 10ms 01 : 50ms 10 : 100ms 11 : 200ms R/W Reset Value R/W Option R/W Option R/W Option R/W Option Read/Write Reset Value SHDN Control Name Description SHDN_CTRL Power Off setting by CPU, after set, 100ms delayed power off 0 : Normal operation 1 : Disable the PMIC output R/W Option SHDN_TIMING Disable Buck/LDO only for normal power off (SHDN_CTRL = 1) 0 : disable at the same time 1 : contrary to the startup timing (first_on-last_off) R/W Option [5:4] SHDN_DLYTIME Delayed shutdown time after send the (PWRON)key-press-forced-shutdown IRQ (when IRQ is disable, there is no delay) 00 : 100ms 01 : 500ms 10 : 1s 11 : 2s R/W Option [3:0] Reserved R/W 0000 7 6 Copyright © 2016 Richtek Technology Corporation. All rights reserved. DS5028B-00 April 2016 is a registered trademark of Richtek Technology Corporation. www.richtek.com 29 RT5028B Address 16 Bit Powered off conditions enable setting Name Description Read/Write Reset Value 7 BCK1LV_ENSHDN Buck1 output voltage low SHDN 0 : disable this event. 1 : enable this event R/W 0 6 BCK2LV_ENSHDN Buck2 output voltage low SHDN 0 : disable this event. 1 : enable this event R/W 0 5 BCK3LV_ENSHDN Buck3 output voltage low SHDN 0 : disable this event. 1 : enable this event R/W 0 4 BCK4LV_ENSHDN Buck4 output voltage low SHDN 0 : disable this event. 1 : enable this event R/W 0 3 PWRON_ENSHDN PWRON key-pressed forced SHDN 0 : disable this event. 1 : enable this event R/W 1 2 OT_ENSHDN Over temperature SHDN 0 : disable this event. 1 : enable this event R/W 1 1 VINLV_ENSHDN VIN voltage low (VOFF) (Set by reg) SHDN 0 : disable this event. 1 : enable this event R/W 0 0 Reserved R/W 0 Read/Write Reset Value R 1111 R 0000 R/W 0 Address 17 Bit OFF Event (Only reset by POR) Name Description [7:4] OFF_Event Powered off because of (Only shows last power-off event) 0000 : VIN voltage low (VOFF) (Set by reg) 0001 : Buck1 output voltage low 0010 : Buck2 output voltage low 0011 : Buck3 output voltage low 0100 : PWRON key-pressed forced shutdown 0101 : Power Off register setting 0110 : Over temperature event 0111 : Reboot restart. 1000 : Buck4 output voltage low 1001 : PWR_HOLD fail. 1010 : No event happen. …. 1111 : No event happen [3:0] Reserved Address 18 to 27 16 bytes registers Data Cache (Only reset by POR) Copyright © 2016 Richtek Technology Corporation. All rights reserved. www.richtek.com 30 is a registered trademark of Richtek Technology Corporation. DS5028B-00 April 2016 RT5028B IRQ_PMIC (Power Channels) Address 28 Bit IRQ Enable1 Name Description Read/Write Reset Value 7 OT_IRQ Internal over-temperature was triggered, IRQ enable R/W 1 6 Bck1LV_IRQ Buck1 output voltage equal 66% x VTarget , IRQ enable R/W 1 5 Bck2LV_IRQ Buck2 output voltage equal 66% x VTarget, IRQ enable R/W 1 4 Bck3LV_IRQ Buck3 output voltage equal 66% x VTarget, IRQ enable R/W 1 3 Bck4LV_IRQ Buck4 output voltage equal 66% x VTarget, IRQ enable R/W 1 2 PWRONSP_IRQ PWRON short press, IRQ enable (32s deglitch time) R/W 0 1 PWRONLP_IRQ PWRON long press, IRQ enable (32s deglitch time) R/W 0 0 SYSLV_IRQ VIN voltage is lower than VOFF, IRQ enable R/W 0 Read/Write Reset Value Address 29 Bit IRQ Status1 Name Description 7 OT Internal over-temperature R 0 6 Bck1LV Buck1 output voltage equal 66% x VTarget R 0 5 Bck2LV Buck2 output voltage equal 66% x VTarget R 0 4 Bck3LV Buck3 output voltage equal 66% x VTarget R 0 3 Bck4LV Buck4 output voltage equal 66% x VTarget R 0 2 PWRONSP PWRON short press (32s deglitch time) R 0 1 PWRONLP PWRON long press (32s deglitch time) R 0 0 VINLV VIN voltage is lower than VOFF R 0 Read/Write Reset Value Address 2A Bit IRQ Enable2 Name Description 7 KPSHDN_IRQ Key-press forced shutdown, IRQ enable R/W 1 6 PWRONR_IRQ PWRON press rising edge, IRQ enable R/W 0 5 PWRONF_IRQ PWRON press falling edge, IRQ enable R/W 0 R 0000 Read/Write Reset Value [4:0] Reserved Address 2B Bit IRQ Status2 Name Description 7 KPSHDN Key-press forced shutdown R 0 6 PWRONR PWRON press rising edge R 0 5 PWRONF PWRON press falling edge R 0 [4:2] Reserved R 000 1 OTW125 Internal 125C pre-warning over-temperature. R 0 0 OTW100 Internal 100C pre-warning over-temperature. R 0 Copyright © 2016 Richtek Technology Corporation. All rights reserved. DS5028B-00 April 2016 is a registered trademark of Richtek Technology Corporation. www.richtek.com 31 RT5028B Address 2C PMU On/Off Sequence1 Name Description (Setting on/off sequence priority) (0000 : off, 0001 : first on, 1100 : last on) (The sequence is planed by first on last off) [7:4] Buck2_Seq[3:0] [3:0] Buck1_Seq[3:0] Bit Address 2D Read/Write Reset Value Setting Buck2 on/off sequence priority R/W Option Setting Buck1 on/off sequence priority R/W Option Read/Write Reset Value PMU On/Off Sequence2 Name Description (Setting on/off sequence priority) (0000 : off, 0001 : first on, 1100 : last on) (The sequence is planed by first on last off) [7:4] Buck4_Seq[3:0] Setting Buck4 on/off sequence priority R/W Option [3:0] Buck3_Seq[3:0] Setting Buck3 on/off sequence priority R/W Option Read/Write Reset Value Bit Address 2E PMU On/Off Sequence3 Name Description (Setting on/off sequence priority) (0000 : off, 0001 : first on, 1100 : last on) (The sequence is planed by first on last off) [7:4] LDO2_Seq[3:0] Setting LDO2 on/off sequence priority R/W Option [3:0] LDO1_Seq[3:0] Setting LDO1 on/off sequence priority R/W Option Read/Write Reset Value Bit Address 2F PMU On/Off Sequence4 Name Description (Setting on/off sequence priority) (0000 : off, 0001 : first on, 1100 : last on) (The sequence is planed by first on last off) [7:4] LDO4_Seq[3:0] Setting LDO4 on/off sequence priority R/W Option [3:0] LDO3_Seq[3:0] Setting LDO3 on/off sequence priority R/W Option Read/Write Reset Value Bit Address 30 PMU On/Off Sequence5 Name Description (Setting on/off sequence priority) (0000 : off, 0001 : first on, 1100 : last on) (The sequence is planed by first on last off) [7:4] LDO6_Seq[3:0] Setting LDO6 on/off sequence priority R/W Option [3:0] LDO5_Seq[3:0] Setting LDO5 on/off sequence priority R/W Option Read/Write Reset Value Bit Address 31 PMU On/Off Sequence5 Name Description (Setting on/off sequence priority) (0000 : off, 0001 : first on, 1100 : last on) (The sequence is planed by first on last off) [7:4] LDO8_Seq[3:0] Setting LDO8 on/off sequence priority R/W Option [3:0] LDO7_Seq[3:0] Setting LDO7 on/off sequence priority R/W Option Read/Write Reset Value R Option Bit Address 32 Bit [7:6] Name Soft-Start Control Description Reserved Copyright © 2016 Richtek Technology Corporation. All rights reserved. www.richtek.com 32 is a registered trademark of Richtek Technology Corporation. DS5028B-00 April 2016 RT5028B [5:2] [1:0] Soft-Start End Control @ MASK_GPIO = 0 (External Enable pin define) 0000 : First turn on channel decide the RESET_DLY time. 0001 : Buck1 decide the RESET_DLY time. …. 0100 : Buck1 decide the RESET_DLY time. 0101 : LDO1 decide the RESET_DLY time. …. 1100 : LDO8 decide the RESET_DLY time. …. 1111 : LDO8 decide the RESET_DLY time. R/W Option Soft-Start Voltage level / time soft-start control. Voltage Level 00 : When output voltage arrives to 80% VTarget, next channel will turn on. Soft-start time interval (TSS) : 01 : 1ms 10 : 4ms 11 : 8ms R/W Option Read/Write Reset Value Address 33 Bit [7:6] [5:0] Name Description VCO_VRC VCO input voltage slop. 00: 25mV/10s, 01: 25mV/20s 10: 25mV/40s, 11: 25mV/80s Note : The VCO’s voltage input range is 0.375V to 1.8V and the output frequency is 500kHz to 2.18MHz. R/W Option VCO_DVS VCO input voltage DVS control 000000 : 0.375V (500kHz) ……… 111001 : 1.8V (2MHz) ……… 111111 : 1.8V (2MHz) R/W Option Read/Write Reset Value R/W 0000000 R/W Option Read/Write Reset Value R/W 00 Address 34 Bit [7:1] 0 Name [7:6] Buck Syn-Clock Spread Spectrum Control Description Reserved SSOSC Address 3A Bit Buck Syn-Clock Control Name Buck Clock Spread Spectrum Control 0 : Disable spread spectrum function. 1 : Turn on spread spectrum function. EEPROM (MTP) Control Description Reserved 5 MTP Page 2 Read Read MTP Page 2 R 0 4 MTP Page 1 Read Read MTP Page 1 R 0 R/W 00 [3:2] Reserved 1 MTP Page 2 write Write MTP Page 2, and MTP also needs to be logic high. W 0 0 MTP Page 1 write Write MTP Page 1, and MTP also needs to be logic high. W 0 Copyright © 2016 Richtek Technology Corporation. All rights reserved. DS5028B-00 April 2016 is a registered trademark of Richtek Technology Corporation. www.richtek.com 33 RT5028B Table 3. I2C to MTP Mapping Table MTP Page-1 MTP I2C Register Address Address Bit7 Bit6 Bit5 Bit4 Function 0x01 1 1 0 1 0 0 0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Reset Condition A A A A A A A A BUCKcontrol2 Buck2Output[5:0] 1 0 0 0 0 0 0 0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Reset Condition A A A A A A A A BUCKcontrol3 Buck3Output[5:0] 0 0 1 0 1 0 0 0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Reset Condition A A A A A A A A BUCKcontrol4 Meaning 0x04 Buck4Output[5:0] 0x05 1 1 0 0 1 1 0 0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Reset Condition A A A A A A A A VRC Control Meaning Buck1V RC_EN Buck2V RC_EN Buck3V RC_EN Buck4V RC_EN Reserved Reserved Reserved Reserved Default 1 1 1 1 0 0 0 0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Reset Condition A A A A A A A A Function 0x04 0x07 LDOcontrol1 Meaning Reserved LDO1OUT[6:0] Default 0 0 1 1 0 1 1 1 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Reset Condition A A A A A A A A Copyright © 2016 Richtek Technology Corporation. All rights reserved. www.richtek.com 34 Buck4VRC Default Function 0x0D Buck3VRC Default Function 0x03 Buck2VRC Default Meaning 0x03 Buck1VRC 0 Function 0x02 Bit0 Default Meaning 0x02 Bit1 Buck1Output[5:0] Function 0x01 Bit2 BUCKcontrol1 Meaning 0x00 Bit3 is a registered trademark of Richtek Technology Corporation. DS5028B-00 April 2016 RT5028B MTP Address I2C Register Address Bit7 Bit6 Bit5 Function 0x05 Default 0 0 0 0 0 1 1 1 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Reset Condition A A A A A A A A 0x08 LDOcontrol3 Meaning Reserved Default 0 0 1 1 0 1 1 1 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Reset Condition A A A A A A A A 0x09 LDO3OUT[6:0] LDOcontrol4 Meaning Reserved Default 0 0 0 1 1 0 0 0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Reset Condition A A A A A A A A 0x0A LDO4OUT[6:0] LDOcontrol5 Meaning Reserved Default 0 0 0 0 1 0 1 1 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Reset Condition A A A A A A A A 0x0B LDO5OUT[6:0] LDOcontrol6 Meaning Reserved Default 0 0 0 0 1 0 1 1 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Reset Condition A A A A A A A A 0x0C LDO6OUT[6:0] Function 0x0A LDOcontrol7 Meaning Reserved Default 0 0 1 0 0 0 1 1 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Reset Condition A A A A A A A A 0x0D LDO7OUT[6:0] Function 0x0B Bit0 LDO2OUT[6:0] Function 0x09 Bit1 Reserved Function 0x08 Bit2 Meaning Function 0x07 Bit3 LDOcontrol2 Function 0x06 Bit4 LDOcontrol8 Meaning Reserved Default 0 1 0 0 0 0 1 1 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Reset Condition A A A A A A A A 0x0E LDO8OUT[6:0] Copyright © 2016 Richtek Technology Corporation. All rights reserved. DS5028B-00 April 2016 is a registered trademark of Richtek Technology Corporation. www.richtek.com 35 RT5028B MTP Address I2C Register Address Bit7 Bit6 Function 0x0F 0x12 No mapping VOFF setting Bit3 Bit2 Bit1 Bit0 Reserved Reserved Reserved Reserved Reserved Default 0 1 1 0 0 0 0 0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Reset Condition A A A A B B B B Function x Meaning Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Default 0 0 0 0 0 0 0 0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Reset Condition A A A A A A A A Copyright © 2016 Richtek Technology Corporation. All rights reserved. www.richtek.com 36 Bit4 VIN UVLO (update default value after power on) Meaning 0x0C Bit5 is a registered trademark of Richtek Technology Corporation. DS5028B-00 April 2016 RT5028B MTP Page-2 MTP 2 I C Register Address Address Bit7 Bit6 Function Meaning 0x00 0x10 0x15 0 1 0 1 1 0 0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Reset Condition A A A A A A A A START_TIME L_PRESS_TIME RESET_DLY 1 1 0 0 0 0 1 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Reset Condition A A A A A A A A SHDN Control Meaning SHDN_ CTRL SHDN_ TIMING Default 0 1 1 0 0 0 0 0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Reset Condition B A A A A A A A SHDN_DLYTIME Reserved Reserved Reserved Reserved PMU On/Off Sequence1 Buck2_Seq[3:0] Buck1_Seq[3:0] Default 0 0 1 0 0 0 0 1 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Reset Condition A A A A A A A A PMU On/Off Sequence2 Buck4_Seq[3:0] Buck3_Seq[3:0] Default 0 1 0 0 0 0 1 1 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Reset Condition A A A A A A A A PMU On/Off Sequence3 Meaning 0x2E SHDN_PRESS 1 Function 0x05 Reserved DisTHOLD Default Meaning 0x2D THOLD PWRON time Parameters Setting / RESET delay Function 0x04 Bit0 1 Meaning 0x2C Bit1 Default Function 0x03 Bit2 Delayed1[1:0] Function 0x02 Bit3 Delayed2[1:0] Meaning 0x14 Bit4 REBOOT/PWRHOLD delay time control Function 0x01 Bit5 LDO2_Seq[3:0] LDO1_Seq[3:0] Default 0 1 1 0 0 1 0 1 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Reset Condition A A A A A A A A Copyright © 2016 Richtek Technology Corporation. All rights reserved. DS5028B-00 April 2016 is a registered trademark of Richtek Technology Corporation. www.richtek.com 37 RT5028B MTP I2C Register Address Address Bit7 Bit6 Bit5 Function 0x2F LDO4_Seq[3:0] 0 0 1 1 1 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Reset Condition A A A A A A A A PMU On/Off Sequence5 LDO6_Seq[3:0] 1 0 0 1 1 0 0 1 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Reset Condition A A A A A A A A PMU On/Off Sequence6 LDO8_Seq[3:0] 1 0 0 1 1 0 0 1 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Reset Condition A A A A A A A A Soft-Start Control Reversed Reversed Soft-Start End Select @MASK_GPIO=1 0 0 0 0 0 0 0 0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Reset Condition A A A A A A A A Meaning 0x33 Buck Syn-Clock Control VCO_VRC 0 0 0 0 0 0 0 0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Reset Condition A A A A A A A A Meaning 0x0C 0x34 No mapping Buck Syn-Clock Spread Spectrum Control Reversed Reversed Reversed Reversed Reversed Reversed Reversed SSOSC Default 0 0 0 0 0 0 0 0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Reset Condition A A A A A A A A Function x Meaning Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Default 0 0 0 0 0 0 0 0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Reset Condition A A A A A A A A Copyright © 2016 Richtek Technology Corporation. All rights reserved. www.richtek.com 38 VCO_DVS Default Function 0x0B Soft-Start Control Default Function 0x0A LDO7_Seq[3:0] Default Meaning 0x32 LDO5_Seq[3:0] Default Function 0x09 LDO3_Seq[3:0] 0 Meaning 0x31 Bit0 0 Function 0x08 Bit1 1 Meaning 0x30 Bit2 Default Function 0x07 Bit3 PMU On/Off Sequence4 Meaning 0x06 Bit4 is a registered trademark of Richtek Technology Corporation. DS5028B-00 April 2016 RT5028B MTP 2 I C Register Address Address 0x0D 0x0E 0x0F No mapping Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 Function x Meaning Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Default 0 0 0 0 0 0 0 0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Reset Condition A A A A A A A A No mapping Function x Meaning Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Default 0 0 0 0 0 0 0 0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Reset Condition A A A A A A A A No mapping Function x Meaning Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Default 0 0 0 0 0 0 0 0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Reset Condition A A A A A A A A Reset Condition A Reset by MTP (Register 0x12 VOFF Setting). B Reset when VIN < 1.7V. Copyright © 2016 Richtek Technology Corporation. All rights reserved. DS5028B-00 April 2016 is a registered trademark of Richtek Technology Corporation. www.richtek.com 39 RT5028B Outline Dimension 1 1 2 2 DETAIL A Pin #1 ID and Tie Bar Mark Options Note : The configuration of the Pin #1 identifier is optional, but must be located within the zone indicated. Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max A 0.700 0.800 0.028 0.031 A1 0.000 0.050 0.000 0.002 A3 0.175 0.250 0.007 0.010 b 0.150 0.250 0.006 0.010 D 6.900 7.100 0.272 0.280 D2 5.150 5.250 0.203 0.207 E 6.900 7.100 0.272 0.280 E2 5.150 5.250 0.203 0.207 e L 0.400 0.350 0.016 0.450 0.014 0.018 W-Type 56L QFN 7x7 Package Copyright © 2016 Richtek Technology Corporation. All rights reserved. www.richtek.com 40 is a registered trademark of Richtek Technology Corporation. DS5028B-00 April 2016 RT5028B Richtek Technology Corporation 14F, No. 8, Tai Yuen 1st Street, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5526789 Richtek products are sold by description only. Richtek reserves the right to change the circuitry and/or specifications without notice at any time. Customers should obtain the latest relevant information and data sheets before placing orders and should verify that such information is current and complete. Richtek cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Richtek product. Information furnished by Richtek is believed to be accurate and reliable. However, no responsibility is assumed by Richtek or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Richtek or its subsidiaries. DS5028B-00 April 2016 www.richtek.com 41