High Current, High Frequency 8 Outputs Voltage Regulator and 1 Power Switch Power
Management IC for High Performance Tablet and Ultra Notebook Applications
The APW8857 is a Power Management IC (PMIC) de-
signed to provide 8 Voltage regulators and 1 Power Switch
for AMD’s Raven Ridge APU with ability to communicate
via an I2C interface. The IC operates from a wide input
voltage of 6V to 20V. There are 5 Switching Buck regula-
tors 3 low power LDOs and 1 Power Switch that are all
controlled and sequenced via the serial interface.
The Buck PWM regulators consists of 3 switching con-
troller driving external power stage such as APW8707/
APW8703/APW8706 which is capable of supplying up to
13A, 8A and 6A supply, 2 single phase switching regula-
tors supplying up to 3A and 1A supply. The IC is equipped
with all the standard protection features such as over
current, over voltage and internal under voltage lock out
protection. The serial interface is an I2C communication
interface which allows supply sequencing as well as
controlled supply ramp up and ramp down of all supplies
except for the always on 1.5V LDO supplying to RTC load.
The IC is offered in TQFN5x5-40 package.
• High Performance Tablet PCs
• Ultra Notebook PCs
• Netbook PCs
• High Performance Digital Signage
• Medical Devices
• Smart phones
• Provide 3 Buck PWM Controllers with High
Accuracy over Temperature
-VR1 provides 3.3V, 8A peak output current.
-VR2 provides 5V, 8A peak output current.
-VR3 provides 0.8V, 4A peak output current.
• Provide 2 Buck PWM Converters with High
Accuracy over Temperature
-VR4 provides 1.8V, 3A peak output current.
-VR6 provides 0.8V, 1A peak output current
• Provide 3 LDO and 1 Power Switch Outputs with
High Accuracy over Temperature
-VR5 combines a 1.2/1.5/1.8V, 0.25A LDO output with
a power switch.
-VR7 provides a 3.3V LDO output.
-VR8 provides a low quiescent LDO output for RTC.
-One Power Switch with 2.5A output current.
-One 5V LDO output.
• Built in Current limit, Over Voltage protection and
Over temperature protection
• I2C communication Interface for SoC Access
• Support Bit Rate 0.4MBit/s, 1MBit/s and 3.4MBit/s
• Power Sequence Control by GPIO_G3, EN_S0 and
• Built-in Thermal Diode and I2C Reading Function
for Temperature Sensing.
• POK Signal for VR power state.
Implement One Time Programmable (OTP) Function
5x5 TQFN-40 Package
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and
advise customers to obtain the latest version of relevant information to verify before placing orders.
Copyright © ANPEC Electronics Corp.
Rev. A.4 - Jul., 2019