RT5028

Richtek Technology Corp...

Integrated PMIC

Manufacturer: Richtek Technology Corp...

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RT5028 RICHTEK | Alldatasheet

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Technical content

Features

zzzzz Input Voltage Operating Range is 3.3V to 5.5V zzzzz Step-Down Regulator : VIN Range is 3.3V to 5.5V \\\\\ Max Current 2.4A/2A/1.6A/2A \\\\\ Programmable Frequency from 500kHz to 2MHz \\\\\ I2C Programmable Output Level \\\\\ I2C Programmable Operation Mode (Force PWM or Auto PSM/PWM) \\\\\ I 2C Programmable Output Discharge Mode (Discharge or Flatting) zzzzz Linear Regulators : VIN Range is 2.5V to 5.5V \\\\\ I2C Programmable Output Level zzzzz Embedded 32Bytes MTP for Factory Tuning \\\\\ External MTP Pin for Write Protection zzzzz Sequence can be Controlled by I2C or each EN pins Defined by MASK_GPIO pin. zzzzz OT/UVP/VIN LV/POWRON press Time Interrupt (IRQ). \\\\\ I2C Control Interface: Support Fast Mode up to 400kb/s zzzzz RoHS Compliant and Halogen Free Package Type QW : WQFN-56L 7x7 (W-Type) RT5028 Lead Plating System G : Green (Halogen Free and Pb Free)

Ordering Information

Note : Richtek products are : \ RoHS compliant and compatible with the current require- ments of IPC/JEDEC J-STD-020. \ Suitable for use in SnPb or Pb-free soldering processes.

Applications

MASK_GPIO SADDR RESET ENBx ENLx Integrated PMIC with 4-Channel Synchronous Buck Converters, 8 LDOs, and MTP Non-Volatile Memory for Industrial Applications

DS5028-02 September 2016www.richtek.com RT5028 ©Copyright 2016 Richtek Technology Corporation. All rights reserved. is a registered trademark of Ric htek Technology Corporation. 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 Ω pull-low resistor. 13 ENL5 Enable control input for LDO5. Connect a 100k Ω pull-low resistor. 14 ENL6 Enable control input for LDO6. Connect a 100k Ω pull-low resistor. 15 SCL Clock input for I 2C. Open-drain output, connect a 10kΩ pull-up resistor. Pin Configuration (TOP VIEW) WQFN-56L 7x7 Marking Information RT5028GQW : Product Number YMDNN : Date CodeRT5028 GQW YMDNN VOUTL1 VOUTL3 VOUTL2 ENL4 VOUTL8 VINL78 VOUTL7 VOUTL4 VINL456 VOUTL6 VOUTL5 VINL123 SCL SDA ENL7 ENL8 IRQ PWRHOLD AGND PWRON REBOOT MTP MASK_GPIO LXB2 VOUTB2S ENB2 VINB4 VOUTB3S AGND LXB3 LXB3 VINB3 VINB3 LXB2 ENL3 ENL2 ENL1 VIN VDDP VINB1 VOUTB1S ENB1 LXB1 LXB1 262524232221201918171615 454647484950515253545556 LXB431 ENB330 VOUTB4S29 SADDR ENB4 ENL5 13 ENL6 14 VINB2 VINB2 AGND VINB1 AGND RESET

DS5028-02 September 2016 www.richtek.com RT5028 ©Copyright 2016 Richtek Technology Corporation. All rights reserved. is a registered trademark of Ric htek Technology Corporation. Pin No. Pin Name Pin Function 16 SDA Data input for I2C. Open-drain output, connect a 10kΩ pull-up resistor. 17 ENL7 Enable control input for LDO7. Connect a 100k Ω pull-low resistor. 18 ENL8 Enable control input for LDO8. Connect a 100k Ω pull-low resistor. 19 IRQ Open-Drain IRQ output node. 20 RESET Reset output. 21, 34, 56, 57 (Exposed Pad) AGND 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 Ω pull-up resistor. 23 REBOOT System power reboot. Connect a 100k Ω pull-low resistor. 24 MTP MTP write protection pin. Connect a 100kΩ 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 100kΩ pull-low resistor. As MASK_GPIO is high, ignore all EN pins. As MASK_GPIO is low, EN pins and I 2C both can control. EN pins priority is higher than I2C. 26 PWRHOLD Power hold input. Connect a 100k Ω pull-low resistor. 27 SADDR I 2C slave address. Connect a 100kΩ pull-low resistor. 28 ENB4 Enable control input for Buck4. Connect a 100k Ω pull-low resistor. 29 VOUTB4S Output voltage regulation node for Buck4. 30 ENB3 Enable control input for Buck3. Connect a 100k Ω 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 Ω 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 Ω 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 Ω pull-low resistor. 54 ENL2 Enable control input for LDO2. Connect a 100k Ω pull-low resistor. 55 ENL3 Enable control input for LDO3. Connect a 100k Ω pull-low resistor.

DS5028-02 September 2016www.richtek.com RT5028 ©Copyright 2016 Richtek Technology Corporation. All rights reserved. is a registered trademark of Ric htek Technology Corporation. Functional Block Diagram Central Controller I2C Programmable State Machine LDO1 300mA LDO2 300mA LDO3 300mA LDO4 300mA LDO5 300mA LDO6 300mA LDO7 300mA LDO8 300mA Buck2 Buck1 2.4A VINL123 VINL456 VOUTL2 VOUTL3 VOUTL4 VOUTL5 VOUTL6 VOUTL7 VOUTL8 SDA SCL IRQ PWRHOLD REBOOT VINB1 LXB1 VOUTB2S LXB2 VINB2 VOUTB1S MASK_GPIO SADDR PWRON ENB1 to ENB4 ENL1 to ENL8 MTP VOUTL1 VINL78 RESET Buck3 1.6A VINB3 LXB3 VOUTB3S Buck4 VINB4 LXB4 VOUTB4S Analog Base VIN VDDP AGND GND GND GND GND

DS5028-02 September 2016 www.richtek.com RT5028 ©Copyright 2016 Richtek Technology Corporation. All rights reserved. is a registered trademark of Ric htek Technology Corporation. Operation The RT5028 is a highly-integrated solution for industrial system including 4-CH step-down DC-DC converters and 8-CH LDOs. The RT5028 application mechanism will be introduced in later sections. The power-on and power-off sequences can be controlled by I 2C 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 I 2C. 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. 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 I 2C programmable power on/off sequence and discharge function. The output voltage is adjustable by the I 2C interface in the range of 1.6V to 3.6V. 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 (V OUT), the UVP event triggers and PMIC turns off immediately.

DS5028-02 September 2016www.richtek.com RT5028 ©Copyright 2016 Richtek Technology Corporation. All rights reserved. is a registered trademark of Ric htek Technology Corporation. Absolute Maximum Ratings (Note 1) z Power Dissipation, PD @ TA = 25°C z Package Thermal Resistance (Note 2) z ESD Susceptibility (Note 3) Recommended Operating Conditions (Note 4)

Electrical Characteristics

(VIN = 3.3V to 5.5V, TA = −40°C to 85°C, unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Operation Voltage of VIN As fSW > 1MHz, 3.3V ≤ VIN ≤ 5.5V. If fSW ≤ 1MHz, VIN ≥ 4V. 3.3 -- 5.5 V PMIC VIN = 5V, LDOs, Bucks are ON with No Load. 300 450 600 μA Quiescent Current I IN VIN = 5V, LDOs, Bucks are OFF. SCL = SDA = 0V 5 20 40 μA Temperature 1 -- 100 -- Warning for Die Temperature OTW Temperature 2 -- 125 -- Over-Temperature Protection OTP -- 165 -- °C OTP and Warning Hysteresis -- 10 -- °C Input Pull-low 100k Resistor R Low V IN = 5V, Temperature = −40°C to 125°C 70 115 160 k Ω

DS5028-02 September 2016 www.richtek.com RT5028 ©Copyright 2016 Richtek Technology Corporation. All rights reserved. is a registered trademark of Ric htek Technology Corporation. Parameter Symbol Test Conditions Min Typ Max Unit Buck1 to Buck4 Input Voltage V INB 3.3 -- 5.5 V Output Voltage V OUTB Buck1 I2C Programmable per step 25mV 0.7 -- 1.8 V Buck2 I2C Programmable per step 25mV 0.7 -- 1.8 Buck3 I2C Programmable per step 50mV 0.7 -- 3.6 Buck4 I2C Programmable per step 50mV 0.7 -- 3.6 Consumption Current IVINB AUTO Mode I OUT = 0mA, Each Buck 10 20 40 μA Efficiency Peak Eff VOUT = 1.2V, VIN = 3.6V ILOAD = CCM -- 88 -- ILOAD = 1mA -- 80 -- Output Voltage Accuracy VOUTAcc 3.1V < VIN < 5.5V, 1mA < IOUT < IMAX As VOUTB1S to VOUTB4S ≥ 1V. −3 -- 3 %mV As VOUTB1S to VOUTB4S < 1V. 30 -- 30 Output Voltage Ripple VRip IOUT = 1mA, COUT = 10μF, 2MHz -- 25 -- mV IOUT = 1A, COUT = 10μF, 2MHz -- 8 -- Output Voltage Temperature Coefficient -- ±100 -- ppm/ °C Switching Frequency fSW I 2C Programmable 0.43 -- 2 MHz Switching Frequency Accuracy 1MHz < fSW −10 -- 10 fSW ≤ 1MHz −20 -- 20 Suggest Inductor L Buck -- 2.2 -- μH Peak Current Limit OCP Buck1 3.1 4.4 5.8 A Buck2 2.8 4 5.2 Buck3 2.6 3.7 4.8 Buck4 2.8 4.1 5.3 Under-Voltage Protection UVP VOUTB1S to VOUTB4S < 0.66 x (V OUT Target) 56 66 76 % Maximum Output Current IMAX Buck1 2.4 -- -- A Buck2 2 -- -- Buck3 1.6 -- -- Buck4 2.0 -- -- Output Transient Response Vpeak 0.8A to 1.6A at 20μs, VOUT = 1.2V Buck1 and Buck2 −4 -- 4 % High-Side On-Resistance Rpon V IN = 3.7V 50 150 250 m Ω Low-Side On-Resistance Rnon V IN = 3.7V 40 110 160 m Ω

DS5028-02 September 2016www.richtek.com RT5028 ©Copyright 2016 Richtek Technology Corporation. All rights reserved. is a registered trademark of Ric htek Technology Corporation. Parameter Symbol Test Conditions Min Typ Max Unit LDO1 to LDO8 Input Voltage for VINL123/456/78 VINL 2.5 -- 5.5 V Output Voltage LDO123/78 V OUTL 3.1V ≤ VIN ≤ 5.5V, 50μA ≤ IOUT ≤ IMAX −3% 1.6 to 3.6 3% V Output Voltage LDO456 V OUTL 3.1V ≤ VIN ≤ 5. 5V, 50μA ≤ IOUT ≤ IMAX −3% 3 to 3.6 3% V Output Current I OUT 300 -- -- mA Output Short Current Isht 330 450 600 mA Voltage Difference VIN − VOUT VIN > 3.1V VIN = VSET, IOUT = IOUTMAX 0.05 0.1 0.3 V VIN > 2.5V 0.05 0.11 0.5 Output Voltage Temperature Coefficient -- ±100 -- ppm/ °C Supply Current I SS I OUT = 0mA 10 35 60 μA Shutdown Current I OFF 0 1 2 μA Line Regulation Input 3V to 5V, load = 100mA 0 1 5 mV Load Regulation V IN = 5V, Load 100mA to 300mA 0 0.1 1 % Transient Response ΔVOUT 50 μA ↔ IOUTMAX / 2 (⊿t = 1μs) -- 50 -- mV Ripple Rejection f = 10kHz, I OUT = IOUTMAX / 2 -- 60 -- dB Rising Time V OUT ≥ 0.7 x VTarg et, IOUT = 0mA 150 220 300 μs Falling Time V OUT ≤ 0.3 x VTarg et, IOUT = 0mA 300 600 1000 μs I2C Interface Electrical Characteristics Voltage Output Low V OL -- -- 0.4 V Input Voltage High-Level V IH 1.5 -- -- V Low-Level V IL -- -- 0.4 SCL Clock SCL -- -- 400 kHz 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. θ JA is measured at T A = 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.

DS5028-02 September 2016 www.richtek.com RT5028 ©Copyright 2016 Richtek Technology Corporation. All rights reserved. is a registered trademark of Ric htek Technology Corporation. Typical Application Circuit RT5028 ENL1 to ENL8 ENB1 to ENB4 VINL456 VINL1232 AGND 21, 34, 56, 57 (Exposed Pad) VINL7810 VOUTL3 VOUTL4 VOUTL5 VOUTL6 VOUTL8 VOUTL7 1µF 1µF VOUTL2 VOUTL1 1µF 1µF 1µF 1µF 1µF 1µF 1µF 1µF 1µF VDDP511µF VIN52 1µF VINB2 LXB2 VOUTB2S 22µF 2.2µH 10µF 43, 44 41, 42 VINB1 LXB1 VOUTB1S 22µF 2.2µH 10µF 45, 46 47, 48 VINB4 LXB4 VOUTB4S 22µF 2.2µH 10µF VINB3 LXB3 VOUTB3S 22µF 2.2µH 10µF 37, 38 35, 36

33 PWRON 22

MASK_GPIO AP As SADDR connect to AGND slave address =0111111 As SADDR connect to VIN slave address =0110111 As MASK_GPIO connect to AGND EN pins can control. As MASK_GPIO connect to VIN Ignore all EN pins. As MTP connect to AGND Inhibit to write MTP. As MTP connect to VIN Permit to write MTP. SADDR MASK_GPIOMTP AGND VIN

DS5028-02 September 2016www.richtek.com RT5028 ©Copyright 2016 Richtek Technology Corporation. All rights reserved. is a registered trademark of Ric htek Technology Corporation. Typical Operating Characteristics CH1 Buck Efficiency vs. Output Current 100 10 100 1000 10000 Output Current (mA) Efficiency (%) VOUT = 1.35V, L = 2.2μH, COUT = 10μF VIN = 3.3V VIN = 3.6V VIN = 3.9V VIN = 4.2V VIN = 5V VIN = 5.5V CH2 Buck Efficiency vs. Output Current 100 10 100 1000 10000 Output Current (mA) Efficiency (%) VOUT = 1.5V, L = 2.2μH, COUT = 10μF VIN = 3.3V VIN = 3.6V VIN = 3.9V VIN = 4.2V VIN = 5V VIN = 5.5V CH3 Buck Efficiency vs. Output Current 100 10 100 1000 10000 Output Current (mA) Efficiency (%) VOUT = 1.2V, L = 2.2μH, COUT = 10μF VIN = 3.3V VIN = 3.6V VIN = 3.9V VIN = 4.2V VIN = 5V VIN = 5.5V CH4 Buck Efficiency vs. Output Current 100 10 100 1000 10000 Output Current (mA) Efficiency (%) VOUT = 3.3V, L = 2.2μH, COUT = 10μF VIN = 3.6V VIN = 3.9V VIN = 4.2V VIN = 4.5V VIN = 5V VIN = 5.5V CH2 Buck Output Voltage vs. Output Current 1.47 1.48 1.49 1.50 1.51 1.52 1.53 0 500 1000 1500 2000 Output Current (A) Output Voltage (V) L = 2.2μH, COUT = 10μF VIN = 3.3V VIN = 3.6V VIN = 3.9V VIN = 4.2V VIN = 5V VIN = 5.5V CH1 Buck Output Voltage vs. Output Current 1.32 1.33 1.34 1.35 1.36 1.37 1.38 1.39 0 300 600 900 1200 1500 1800 2100 2400 Output Current (mA) Output Voltage (V) L = 2.2μH, COUT = 10μF VIN = 3.3V VIN = 3.6V VIN = 3.9V VIN = 4.2V VIN = 5V VIN = 5.5V

DS5028-02 September 2016 www.richtek.com RT5028 ©Copyright 2016 Richtek Technology Corporation. All rights reserved. is a registered trademark of Ric htek Technology Corporation. CH4 Buck Output Voltage vs. Input Voltage 2.40 2.60 2.80 3.00 3.20 3.40 3.60 3.80 Input Voltage (V) Output Voltage (V) L = 2.2μH, COUT = 10μF IOUT = 0mA IOUT = 500mA IOUT = 1000mA IOUT = 1500mA IOUT = 2000mA CH3 Buck Output Voltage vs. Input Voltage 1.14 1.15 1.16 1.17 1.18 1.19 1.20 1.21 1.22 1.23 1.24 Input Voltage (V) Output Voltage (V) L = 2.2μH, COUT = 10μF IOUT = 0mA IOUT = 500mA IOUT = 1000mA IOUT = 1600mA CH1 Buck Output Voltage vs. Input Voltage 1.30 1.31 1.32 1.33 1.34 1.35 1.36 1.37 1.38 1.39 1.40 Input Voltage (V) Output Voltage (V) L = 2.2μH, COUT = 10μF IOUT = 0mA IOUT = 500mA IOUT = 1000mA IOUT = 1500mA IOUT = 2000mA IOUT = 2400mA CH2 Buck Output Voltage vs. Input Voltage 1.45 1.47 1.49 1.51 1.53 1.55 Input Voltage (V) Output Voltage (V) L = 2.2μH, COUT = 10μF IOUT = 0mA IOUT = 500mA IOUT = 1000mA IOUT = 1500mA IOUT = 2000mA CH4 Buck Output Voltage vs. Output Current 3.08 3.13 3.18 3.23 3.28 3.33 3.38 0 500 1000 1500 2000 Output Current (mA) Output Voltage (V) L = 2.2μH, COUT = 10μF VIN = 3.6V VIN = 3.9V VIN = 4.2V VIN = 4.5V VIN = 5V VIN = 5.5V CH3 Buck Output Voltage vs. Output Current 1.17 1.18 1.19 1.20 1.21 1.22 1.23 1.24 1.25 0 200 400 600 800 1000 1200 1400 1600 Output Current (mA) Output Voltage (V) L = 2.2μH, COUT = 10μF VIN = 3.3V VIN = 3.6V VIN = 3.9V VIN = 4.2V VIN = 5V VIN = 5.5V

DS5028-02 September 2016www.richtek.com RT5028 ©Copyright 2016 Richtek Technology Corporation. All rights reserved. is a registered trademark of Ric htek Technology Corporation. LDO7 Output Voltage vs. Input Voltage 2.40 2.42 2.44 2.46 2.48 2.50 2.5 3 3.5 4 4.5 5 5.5 Input Voltage (V) Output Voltage (V) IOUT = 0mA IOUT = 100mA IOUT = 200mA IOUT = 300mA COUT = 1μF LDO5 Output Voltage vs. Input Voltage 3.00 3.05 3.10 3.15 3.20 3.25 3.30 3.35 3.40 3.45 3.50 Input Voltage (V) Output Voltage (V) IOUT = 0mA IOUT = 100mA IOUT = 200mA IOUT = 300mA COUT = 1μF LDO7 Output Voltage vs. Output Current 2.40 2.42 2.44 2.46 2.48 2.50 2.52 0 50 100 150 200 250 300 Output Current (mA) Output Voltage (V) COUT = 1μF VIN = 2.5V VIN = 3V VIN = 3.6V VIN = 4.2V VIN = 5V VIN = 5.5V LDO2 Output Voltage vs. Input Voltage 1.75 1.76 1.76 1.77 1.77 1.78 1.78 2.5 3 3.5 4 4.5 5 5.5 Input Voltage (V) Output Voltage (V) IOUT = 0mA IOUT = 100mA IOUT = 200mA IOUT = 300mA COUT = 1μF LDO2 Output Voltage vs. Output Current 1.750 1.755 1.760 1.765 1.770 1.775 1.780 1.785 1.790 0 50 100 150 200 250 300 Output Current (mA) Output Voltage (V) COUT = 1μF VIN = 2.5V VIN = 3V VIN = 3.6V VIN = 4.2V VIN = 5V VIN = 5.5V LDO5 Output Voltage vs. Output Current 3.20 3.22 3.24 3.26 3.28 3.30 3.32 0 50 100 150 200 250 300 Output Current (mA) Output Voltage (V) COUT = 1μF VIN = 3.3V VIN = 3.6V VIN = 3.9V VIN = 4.2V VIN = 5V VIN = 5.5V

Application Information

The RT5028 is a highly-integrated solution for industrial system including PMIC and memory system. The RT5028 application mechanism and I 2C 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 step- down DC-DC converters. Power-On and Power-Off sequences are control by PWRON and RESET input pins. S Slave Address 0 A Register Address A Data Byte A P R/W Acknowledge from RT Acknowledge from RT Acknowledge from Master Sr Slave Address 1 A Acknowledge from RT Repeated Start R/W 1Byte Reading n Indexed Words of Data from RT (With N-Byte) S Slave Address 0 A Register Address A Data Byte A Data Byte A P Acknowledge from RT Acknowledge from RT Acknowledge from Master Acknowledge from Master Sr Slave Address 1 A Acknowledge from RT Repeated Start Data Byte A Data Byte A Acknowledge from Master Acknowledge from Master R/WR/W 1st Byte 2nd Byte (n-1)th Byte nth Byte 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. I 2C Interface Timing Diagram The RT5028 acts as an I2C -bus slave. The I2C-bus master configures the settings for all function blocks by sending command bytes to the RT5028 via the 2-wire I 2C-bus. The I2C timing diagrams are list in the following. Write Function Writing One Byte of Data to RT (With 1-Byte) S Slave Address 0 A Register Address A Data Byte A P R/W Acknowledge from RT Acknowledge from RT Acknowledge from RT 1Byte Writing n Bytes of Data to RT (With N-Byte) S Slave Address 0 A Register Address A Data Byte A Data Byte A P Acknowledge from RT Acknowledge from RT Acknowledge from RT Acknowledge from RT A Acknowledge from RT R/W (n-1)th Byte nth Byte Data Byte 1st Byte A Acknowledge from RT Data Byte 2nd Byte

DS5028-02 September 2016www.richtek.com RT5028 ©Copyright 2016 Richtek Technology Corporation. All rights reserved. is a registered trademark of Ric htek Technology Corporation. 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 RT5028 PMIC, the UVP event will be set out when the Buck1 to Buck4s' output voltage is lower than 1/2 x (V OUT). Power Off PWRON Check Power On Sequence Normal Operation OTP Check UVP Check PWROFF Check REBOOT Check Power Off No Yes No Yes YesYes Yes NoNo No VIN Power Good Yes No Edge trigger Edge trigger Mask_GPIO1 (Internal I2C) External EN Check Yes No REBOOT Check Yes (External Enable Control)

DS5028-02 September 2016 www.richtek.com RT5028 ©Copyright 2016 Richtek Technology Corporation. All rights reserved. is a registered trademark of Ric htek Technology Corporation. PMIC - POWER ON/OFF Setting The circuit setting for communication between RT5028 and AP is showed as below. Power Hold Function When the “PWRHOLD” signal does not come during THOLD time, the RT5028 will do shutdown sequence. If users want to disable power hold function, set “DisTHOLD” bit in I 2C register 10 bit[0] to disable this function. In the timing diagram below, the “THOLD” and “RESET_DLY” can be set by MTP program. BUCK1 LDO1 LDO8 PWRON BUCK4 PWRHOLD THOLD Always Low START_TIME Turn off sequence : First-on-last-Off RESET RESET_DLY State Machine ENL1 to ENL8 ENB1 to ENB4 PWRON IRQ SCL SDA REBOOT PWRHOLD SADDR MTP MASK_GPIO APRESET SADDR MASK_GPIOMTP AGND VIN 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.

DS5028-02 September 2016www.richtek.com RT5028 ©Copyright 2016 Richtek Technology Corporation. All rights reserved. is a registered trademark of Ric htek Technology Corporation. When AP sends the “PWRHOLD” signal during THOLD time, the RT5028 will keep power-on. BUCK1 LDO1 LDO8 BUCK4 PWRHOLD PWRON THOLD Low to High signal from AP. START_TIME RESET RESET_DLY Timing Based ON/OFF Sequence BUCK1 BUCK2 LDO1 LDO8 PWRON BUCK4 START_TIME Normal power on ... Normal power off SHDN_PRESS TSS TSS TSS TSS RESET RESET_DLY

DS5028-02 September 2016 www.richtek.com RT5028 ©Copyright 2016 Richtek Technology Corporation. All rights reserved. is a registered trademark of Ric htek Technology Corporation. Level Based ON/OFF Sequence BUCK1 BUCK2 LDO1 LDO8 PWRON BUCK4 START_TIME Normal power on >80 % Normal power off 8ms >80 % >80 % >80 % SHDN_PRESS 8ms RESET_DLY RESET Abnormal OFF BUCK1 BUCK2 LDO1 LDO8 IRQ PWRON BUCK4 START_TIME SHDN_DLYTIME TSS TSS Normal power on Abnormal power offIRQ Even Occur RESET_DLY RESET

DS5028-02 September 2016www.richtek.com RT5028 ©Copyright 2016 Richtek Technology Corporation. All rights reserved. is a registered trademark of Ric htek Technology Corporation. PMU On/Off Sequence Setting In the RT5028, 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 RT5028 will wait for next channel and the IC will be hold in waiting status. Output Voltage Setting Startup Sequence Setting Startup Enable Method (Soft-Start Control) Buck1Output[5:0] Buck1_Seq[3:0] Buck1 [000000] [0001] Buck2Output[5:0] Buck2_Seq[3:0] Buck2 [101100] [0010] Buck3Output[5:0] Buck3_Seq[3:0] Buck3 [000000] [0011] Buck4Output[5:0] Buck4_Seq[3:0] Buck4 [101100] [0100] LDO1OUT[6:0] LDO1_Seq[3:0] LDO1 [0000000] [0101] LDO2OUT[6:0] LDO2_Seq[3:0] LDO2 [0101000] [0110] LDO3OUT[6:0] LDO3_Seq[3:0] LDO3 [0000000] [0111] LDO4OUT[6:0] LDO4_Seq[3:0] LDO4 [0101000] [1000] LDO5OUT[6:0] LDO5_Seq[3:0] LDO5 [0000000] [1001] LDO6OUT[6:0] LDO6_Seq[3:0] LDO6 [0101000] [1010] LDO7OUT[6:0] LDO7_Seq[3:0] LDO7 [0000000] [1011] LDO8OUT[6:0] LDO8_Seq[3:0] LDO8 [0101000] [1100] [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. is a registered trademark of Ric htek Technology Corporation. converter is 0.5MHz to 2MHz. delay2 power off delay time. Table 1. REBOOT Input Control Setting Low, so the system can decide which interrupt is necessary.

©Copyright 2016 Richtek Technology Corporation. All rights reserved. is a registered trademark of Ric htek Technology Corporation. MTP Page1/Page2 will execute erase process firstly. on the maximum power dissipation. Figure 1. Derating Curve of Maximum Power Dissipation

©Copyright 2016 Richtek Technology Corporation. All rights reserved. is a registered trademark of Ric htek Technology Corporation. PCB layout guidelines must be strictly followed. should be minimized for lower EMI. parasitic resistance and inductance from the PCB trace. Figure 2. PCB Layout Guide

32 VINB4

trace, keep sensitive compontents away from this trace.

DS5028-02 September 2016 www.richtek.com RT5028 ©Copyright 2016 Richtek Technology Corporation. All rights reserved. is a registered trademark of Ric htek Technology Corporation. Address 04 BUCKcontrol4 Bit Name Description 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 R/W Option [1:0] Buck4VRC VRC setting 00 : 50mV/10μs, 01 : 100mV/10μs, 10 : 200mV/10μs, 11 : 400mV/10μs R/W Option Address 05 VRC Control Bit Name Description R/W Reset Value

7 Buck1VRC_EN

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

6 Buck2VRC_EN

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

5 Buck3VRC_EN

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

4 Buck4VRC_EN

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 [3:0] Reserved R/W 0000 Address 06 BUCK Mode Bit Name Description R/W Reset Value

7 Buck1mode

0 : Force PWM 1 : Auto Mode (PSM/PWM) R/W 1

6 Buck2mode

0 : Force PWM 1 : Auto Mode (PSM/PWM) R/W 1

5 Buck3mode

0 : Force PWM 1 : Auto Mode (PSM/PWM) R/W 1

4 Buck4mode

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 Address 07 LDOcontrol1 Bit Name Description R/W Reset Value

7 Reserved R/W 0

[6:0] LDO1OUT[6:0] LDO1 output voltage regulation 0000000 : 1.6V, 25mV per step 0000001 : 1.625V ... 0101000 : 3.6V (MAX) 1111111 : 3.6V (MAX) R/W Option Address 08 LDOcontrol2 Bit Name Description R/W Reset Value [6:0] LDO2OUT[6:0] LDO2 output voltage regulation 0000000 : 1.6V, 25mV per step 0000001 : 1.625V ... 0101000 : 3.6V (MAX) 1111111 : 3.6V (MAX) R/W Option Address 09 LDOcontrol3 Bit Name Description R/W Reset Value [6:0] LDO3OUT[6:0] LDO3 output voltage regulation 0000000 : 1.6V, 25mV per step 0000001 : 1.625V ... 0101000 : 3.6V (MAX) 1111111 : 3.6V (MAX) R/W Option

DS5028-02 September 2016 www.richtek.com RT5028 ©Copyright 2016 Richtek Technology Corporation. All rights reserved. is a registered trademark of Ric htek Technology Corporation. Address 0A LDOcontrol4 Bit Name Description R/W Reset Value [6:0] LDO4OUT[6:0] LDO4 output voltage regulation 0000000 : 3 V, 25mV per step 0000001 : 3.025V ... 0011000 : 3.6V (MAX) 1111111 : 3.6V (MAX) R/W Option Address 0B LDOcontrol5 Bit Name Description R/W Reset Value [6:0] LDO5OUT[6:0] LDO5 output voltage regulation 0000000 : 3V, 25mV per step 0000001 : 3.025V ... 0011000 : 3.6V (MAX) 1111111 : 3.6V (MAX) R/W Option Address 0C LDOcontrol6 Bit Name Description R/W Reset Value [6:0] LDO6OUT[6:0] LDO6 output voltage regulation 0000000 : 3.0V, 25mV per step 0000001 : 3.025V ... 0011000 : 3.6V (MAX) 1111111 : 3.6V (MAX) R/W Option Address 0D LDOcontrol7 Bit Name Description R/W Reset Value [6:0] LDO7UT[6:0] LDO7output voltage regulation 0000000 : 1.6V, 25mV per step 0000001 : 1.625V ... 0101000 : 3.6V (MAX) 1111111 : 3.6V (MAX) R/W Option

DS5028-02 September 2016www.richtek.com RT5028 ©Copyright 2016 Richtek Technology Corporation. All rights reserved. is a registered trademark of Ric htek Technology Corporation. Address 0E LDOcontrol8 Bit Name Description R/W Reset Value [6:0] LDO8T[6:0] LDO8utput voltage regulation 0000000 : 1.6V, 25mV per step 0000001 : 1.625V ... 0101000 : 3.6V (MAX) 1111111 : 3.6V (MAX) R/W Option Address 0F LDOs off mode state Bit Name Description R/W Reset Value

7 LDO8oms

LDO8 output off mode state 0 : floating 1 : Ground-discharged R/W 1

6 LDO7oms

LDO7 output off mode state 0 : floating 1 : Ground-discharged R/W 1

5 LDO6oms

LDO6 output off mode state 0 : floating 1 : Ground-discharged R/W 1

4 LDO5oms

LDO5 output off mode state 0 : floating 1 : Ground-discharged R/W 1

3 LDO4oms

LDO4 output off mode state 0 : floating 1 : Ground-discharged R/W 1

2 LDO3oms

LDO3 output off mode state 0 : floating 1 : Ground-discharged R/W 1

1 LDO2oms

LDO2 output off mode state 0 : floating 1 : Ground-discharged R/W 1

0 LDO1ms

0 : floating 1 : Ground-discharged R/W 1 Address 10 REBOOT/PWRHOLD delay time control Bit 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

1 Reserved R/W 0

0 DisTHOLD

Ignore THOLD Time. 0 : Keep PWRHOLD function. 1 : Ignore PWRHOLD function. R/W Option

DS5028-02 September 2016 www.richtek.com RT5028 ©Copyright 2016 Richtek Technology Corporation. All rights reserved. is a registered trademark of Ric htek Technology Corporation. Address 11 ON Event Setting Bit Name Description R/W Reset Value [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 R 111 [4:0] Reserved R/W 0 Address 12 VIN UVLO/Buck On/Off Bit Name Description R/W Reset Value [7:5] VOFF setting 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 R/W Option

4 Reserved R/W 0

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

DS5028-02 September 2016www.richtek.com RT5028 ©Copyright 2016 Richtek Technology Corporation. All rights reserved. is a registered trademark of Ric htek Technology Corporation. Address 14 PWRON(Power On Key) time Parameters Setting / RESET delay Bit Name Description R/W Reset Value [7:6] START_TIME Startup time setting 00 : 100us (pressing time - low level) 01 : 100ms 10 : 1s 11 : 2s R/W Option [5:4] L_PRESS_TIME 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) R/W Option [3:2] SHDN_PRESS Key-press forced shutdown time setting 00 : 4s (pressing time : low level) 01 : 6s 10 : 8s 11 : 10s R/W Option [1:0] RESET_DLY RESET signal delay after the last power startup is done 00 : 10ms 01 : 50ms 10 : 100ms 11 : 200ms R/W Option Address 15 SHDN Control Bit Name Description Read/Write Reset Value

7 SHDN_CTRL

Power Off setting by CPU, after set, 100ms delayed power off 0 : Normal operation 1 : Disable the PMIC output R/W Option

6 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