RT8841 datasheet, PDF - EEWORLD Datasheet

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RT8841: Description4/3/2/1-Phase PWM Controller for High-Density Power Supply; CategoryPower/power management VcoreCont; File Size437KB，32 Pages; ManufacturerRichtek Technology Corporation; Websitehttps://www.richtek.com/

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RT8841 Overview

4/3/2/1-Phase PWM Controller for High-Density Power Supply

RT8841 Parametric

Parameter Name	Attribute value
Status	Active
VID Table Support	K8;K8_M2;VR10.x;VR11.0
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	2
Features	Adjustable Frequency;Adjustable Soft-Start;DCR Current Sense;Droop Control;Enable Input;OCP;OVP;Power Good;SCP;Voltage Mode Control
Package Type	WQFN6x6-40
Datasheet	https://datasheet5.oss-cn-shanghai.aliyuncs.com/datasheets/richtek/DS8841-02.pdf

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RT8841

4/3/2/1-Phase PWM Controller for High-Density Power Supply

General Description

The RT8841 is a 4/3/2/1-phase synchronous buck

controller with 2 integrated MOSFET drivers for VR11 CPU

power application. RT8841 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 applications. RT8841 comes to a small footprint

with WQFN-40L 6x6 package

Features

12V Power Supply Voltage

4/3/2/1-Phase Power Conversion

2 Embedded MOSFET Drivers

Internal Regulated 5V Output

VID Tables for Intel VRD11/VRD10.x and AMD K8,

K8_M2 CPUs

Continuous Differential Inductor DCR Current Sense

Adjustable Soft Start

Adjustable Frequency

Power Good Indication

Adjustable Over Current Protection

Over Voltage Protection

Small 40-Lead WQFN Package

RoHS Compliant and 100% Lead(Pb)-Free

Applications

Desktop CPU Core Power

Low Voltage, High Current DC/ DC Converter

Ordering Information

RT8841

Package Type

QW : WQFN-40L 6x6 (W-Type)

Lead Plating System

P : Pb Free

G : Green (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)

VID0

VID1

VID2

VID3

VID4

VID5

VID6

VID7

EN/VTT

PWRGD

40 39 38 37 36 35 34 33 32 31

VIDSEL

FBRTN

SS/EN

ADJ

COMP

OFS

IMAX

GND

11 12 13 14 15 16 17 18 19 20

GND

BOOT1

UGATE1

PHASE1

LGATE1

VCC12

LGATE2

PHASE2

UGATE2

BOOT2

PWM3

DS8841-01 April 2011

ISP4

ISN4

ISN3

ISP3

ISP2

ISN2

ISN1

ISP1

VCC5

PWM4

WQFN-40L 6x6

www.richtek.com

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