RT8841 datasheet(1/32 Pages) RICHTEK

Part #	RT8841

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

PDF	32 Pages

Scroll/Zoom	100%

Manufacturer	RICHTEK [Richtek Technology Corporation]

Direct Link	http://www.richtek.com

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1 / 32 page

RT8841

1

DS8841-01 April 2011

www.richtek.com

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

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

WQFN-40L 6x6

(TOP VIEW)

BOOT1

UGATE1

PHASE1

LGATE1

VCC12

LGATE2

PHASE2

UGATE2

BOOT2

PWM3

FBRTN

SS/EN

ADJ

FB

OFS

RT

IMAX

GND

30

29

28

27

26

25

24

23

22

21

31

32

33

34

35

36

37

38

39

40

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

GND

COMP

VIDSEL

41

Package Type

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

RT8841

Lead Plating System

P : Pb Free

G : Green (Halogen Free and Pb Free)

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RT8841 Datasheet(PDF) 1 Page - Richtek Technology Corporation

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