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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.

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.

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

Click to expand full 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.
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