RT8867A datasheet, PDF - EEWORLD Datasheet

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RT8867A: DescriptionAdvanced 4/3-Phase PWM Controller for CPU Core Power; CategoryPower/power management VcoreCont; File Size417KB，21 Pages; ManufacturerRichtek Technology Corporation; Websitehttps://www.richtek.com/

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RT8867A Overview

Advanced 4/3-Phase PWM Controller for CPU Core Power

RT8867A Parametric

Parameter Name	Attribute value
Status	Active
VID Table Support	VR11.0;VR11.1
Number of Phases	4
Vcc (typ)(V)	12
Vin (min)(V)	10.8
Vin (max)(V)	13.2
Accuracy (Vout>=1V)(+/- %)	0.5
Freq (typ)(kHz)	300
Built-in DAC Generator	Yes
Number of MOSFET Drivers	3
Features	Adjustable Frequency;Adjustable Soft-Start;Built-in Bootstrap Switch;DCR Current Sense;Droop Control;Enable Input;OCP;OVP;Power Good;SCP;UVP;Voltage Mode Control
Package Type	WQFN6x6-48
Datasheet	https://datasheet5.oss-cn-shanghai.aliyuncs.com/datasheets/richtek/DS8867A-03.pdf

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RT8867A

Advanced 4/3-Phase PWM Controller for CPU Core Power

General Description

The RT8867A is an advanced 4/3-phase synchronous buck

controller with 3 integrated MOSFET drivers. It integrates

an 8-bit DAC that supports Intel VR11.x CPUs power

application.

The IC adopts state-of-the-art dynamic phase control

capability by PS1/2/3 pins and achieves high efficiency

over a wide load range. It uses lossless R

DS(ON)

current

sensing to achieve phase current balance. Other features

include adjustable operating frequency, adjustable soft-

start, short circuit protection, adjustable over current

protection, over voltage protection, under voltage

protection, power good indication, VR_HOT indication and

VR_SHDN indication.

The RT8867A is available in a small footprint with WQFN-

48L 6x6 package.

Features

12V Power Supply Voltage

4/3-Phase Power Conversion

Integrated 3 MOSFET Drivers with Internal

Bootstrap Diode

Dynamic Phase Control Capability

8-bit DAC Supports Intel VR11.x CPUs

Lossless R

DS(ON)

Current Sensing for Current Balance

Adjustable Frequency : 50kHz to 1MHz

Adjustable Over Current Protection

Adjustable Soft-Start

VR_RDY, VR_HOT and VR_SHDN Indications

Small 48-Lead WQFN Package

RoHS Compliant and Halogen Free

Applications

Desktop CPU Core Power

Middle/High End Graphic Cards

Low Voltage, High Current DC/ DC Converters

Ordering Information

RT8867A

Package Type

QW : WQFN-48L 6x6 (W-Type)

Lead Plating System

Z : ECO (Ecological Element with

Halogen Free and Pb free)

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.

Pin Configurations

(TOP VIEW)

VR_RDY

VRSEL

FBRTN

VID0

VID1

VID2

VID3

VID4

VID5

VID6

VID7

BOOT1

48 47 46 45 44 43 42 41 40 39 38 37

Marking Information

RT8867AZQW : Product Number

RT8867A

ZQW

YMDNN

YMDNN : Date Code

PS2

DAC

EAP

COMP

CSP

CSN

IMAX

PS3/VR_SHDN

PS1

13 14 15 16 17 18 19 20 21 22 23 24

GND

UGATE1

PHASE1

LGATE1

VCC12A

BOOT2

UGATE2

PHASE2

LGATE2

VCC12B

LGATE3

PHASE3

UGATE3

is a registered trademark of Richtek Technology Corporation.

DS8867A-01 August 2012

ISEN4

ISEN3

ISEN2

ISEN1

VCC5

VOUT

VR_HOT

PWM4

BOOT3

WQFN-48L 6x6

www.richtek.com

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