General Description

The RT8862 is an advanced 4/3/2/1-phase synchronous buck controller with 2 integrated MOSFET drivers for Intel VR11/VR10 and AMD K8/K8_M2 CPUs power application. RT8862 adopts state-of-the-art dynamic phase control capability. That achieves high efficiency over wide load range. It 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 and enable/shutdown for various application. RT8862 comes to a small footprint with

WQFN-48L 7x7 package.

Features

Support Dynamic Phase Control

12V Power Supply Voltage

4/3/2/1-Phase Power Conversion

2 Embedded MOSFET Drivers

Internal Regulated 5V Output

VID table for INTEL VR11.1/VR10.x and AMD K8/K8_M2 CPUs

Continuous Differential Inductor DCR Current Sense

Adjustable Soft Start

Adjustable Frequency (300kHz typ.)

Power Good Indication

Adjustable Over Current Protection

Over Voltage Protection

VRHOT Sensing with External Thermistor

IMON Output Current Indication

Power State Indicator (PSI)

Small 48-Lead WQFN Package

RoHS Compliant and Halogen Free

Applications

Desktop CPU Core Power

Low Voltage, High Current DC/ DC Converter