US3011CW Datasheet

IC型號(hào)：
US3011CW
PDF描述：
5 BIT PROGRAMMABLE SYNCHRONOUS BUCK CONTROLLER IC
文件大小：
75.34KB
PDF頁(yè)數(shù)：
11頁(yè)
芯片廠家：
UNISEM

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US3011

5 BIT PROGRAMMABLE SYNCHRONOUS BUCK

CONTROLLER IC

PRELIMINARY DATASHEET

FEATURES

Dual Layout Compatible with HIP6004A

Designed to meet Intel specification of VRM8.4

for Pentium III鈩?/div>

On board DAC programs the output voltage

from 1.3V to 3.5V. The US3011 remains on for

VID code of (11111).

Loss less Short Circuit Protection

Synchronous operation allows maximum

efficiency

Patented architecture allows fixed frequency

operation as well as 100% duty cycle during

dynamic load

Over Voltage Protection Output

Soft Start

High current totem pole driver for direct

driving of the external Power MOSFET

Power Good function

DESCRIPTION

The US3011controller IC is specifically designed to meet

Intel specification for latest Pentium III鈩?microproces-

sor applications as well as the next generation P6 fam-

ily processors. These products feature a patented topol-

ogy that in combination with a few external components

as shown in the typical application circuit ,will provide in

excess of 20A of output current for an on- board DC/DC

converter while automatically providing the right output

voltage via the 5 bit internal DAC.These devices also

features,

loss less current sensing by using the Rds-

on of the high side Power MOSFET as the sensing

resistor,

a Power Good window comparator that switches

its open collector output low when the output is outside

of a

鹵10%

window and an OVP output. Other features of

the device are ; Undervoltage lockout for both 5V and

12V supplies , an external programmable soft start func-

tion as well as programming the oscillator frequency by

using an external capacitor.

APPLICATIONS

Pentium III & Pentium II鈩?processor DC to DC con-

verter application

Low cost Pentium with AGP

TYPICAL APPLICATION

C10

C11

V12

11 NC/Gnd

CS+

HDrv

NC/

Boot

CS-

LDrv

Gnd

NC/Sen

Vfb 10

V5/Comp 9

Ct/Rt

OVP

PGd

12V

C12

C13

US3011

3 SS

VID4

VID3

VID2

VID1

VID0

Power Good

C14

3011app1-1.1

OVP

Notes: Pentium II and Pentium III are

trade marks of Intel Corp.

PACKAGE ORDER INFORMATION

Ta (擄C)

0 TO 70

Device

US3011CW

Package

20 pin Plastic SOIC WB

VID Voltage Range

1.3V to 3.5V

Rev. 1.3

12/8/00

4-1

型號(hào)

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描述

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US3011CW Datasheet

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