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RT8857A - 4/3/2/1-Phase PWM Controller

Download the RT8857A datasheet PDF. This datasheet also covers the RT8857 variant, as both devices belong to the same 4/3/2/1-phase pwm controller family and are provided as variant models within a single manufacturer datasheet.

General Description

The RT8857/A is a 4/3/2/1-phase synchronous buck controller with 2 integrated MOSFET drivers for Intel VR11.1/VR10.x and AMD K8/K8_M2 CPUs power application.

RT8857/A uses differential inductor DCR current sense to achieve phase current balance and active voltage positioning.

Key Features

  • include adjustable operating frequency, adjustable soft start, power good indication, external error-amp compensation, over voltage protection, over current protection, VRHOT sensing and IMON for various.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (RT8857_Richtek.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number RT8857A
Manufacturer Richtek
File Size 392.79 KB
Description 4/3/2/1-Phase PWM Controller
Datasheet download datasheet RT8857A Datasheet

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Other Datasheets by Richtek

Part Number Description
RT8857 4/3/2/1-Phase PWM Controller
RT8855 4/3/2/1-Phase PWM Controller
RT8856 Multi-Phase PWM Controller
RT8859M Multi-Phase PWM Controller
RT8811B Dual-Phase COT Buck PWM Controller

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
RT8857/A 4/3/2/1-Phase PWM Controller with Embedded Drivers for CPU Core Power Supply General Description The RT8857/A is a 4/3/2/1-phase synchronous buck controller with 2 integrated MOSFET drivers for Intel VR11.1/VR10.x and AMD K8/K8_M2 CPUs power application. RT8857/A uses differential inductor DCR current sense to achieve phase current balance and active voltage positioning. Other features include adjustable operating frequency, adjustable soft start, power good indication, external error-amp compensation, over voltage protection, over current protection, VRHOT sensing and IMON for various applications.