US3027CW ETC-unknow, US3027CW Datasheet

US3027CW

Manufacturer Part Number

US3027CW

Description

Manufacturer

ETC-unknow

Datasheet

1.US3027CW.pdf (8 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

US3027CW

Manufacturer:

UNISEM

Quantity:

200

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

US3027CW

Quantity:

595

Company:

Meier Automation Equipment Co., Limited

Part Number:

US3027CW

Manufacturer:

UNISEM

Quantity:

20 000

Current page: 1 of 8
Download datasheet (66Kb)

FEATURES

TYPICAL APPLICATION

PACKAGE ORDER INFORMATION

FEATURES

TYPICAL APPLICATION

PACKAGE ORDER INFORMATION

Rev. 1.3

12/8/00

APPLICATIONS

Total Power Soloution for Next Generation Intel

Processor application

AMD K7 Low Cost Solution

Designed to meet VRM 9.0 specification for

next generation micrprocessors

On board 5 bit DAC programs the output

voltage from 1.075V to 1.850V in 25mV steps

Linear regulator controller on board for 1.8V

Provides Single Chip Solution for Vcore,

GTL+ ,AGP Bus, and 1.8V

Automatic Voltage Selection for AGP slot

Vddq supply

Linear regulator controller on board for 1.5V

GTL+ supply

Loss less Short Circuit Protection for all

outputs

Synchronous operation allows maximum

efficiency

Patented architecture allows fixed frequency

operation as well as 100% duty cycle during

dynamic load

Minimum part count

Soft Start

High current totem pole driver for direct

driving of the external Power MOSFET

Power Good function Monitors all Outputs

OVP Circuitry Protects the Switcher Output

and generates a Fault output

Vout2

Vout3

3.3V

Ta ( C)

0 TO 70

5 BIT PROGRAMMABLE SYNCHRONOUS BUCK

CONTROL

US3027

LINEAR

US3027CW

Device

PLUS TRIPPLE LDO CONTROLLER

SWITCHER

CONTROL

LINEAR

DESCRIPTION

The US3027 controller IC is specifically designed to meet

VRM 9.0 specification for next generation microproces-

sor applications requiring multiple on board regulators .

The US3027 provides a single chip controller IC for

the Vcore , 3LDO controllers, one with the auto-

matic select pin that connects to the TYPE DETECT

pin of the AGP slot for the AGP Vddq supply, one

for GTL+ and the other for the 1.8V chip set regula-

tor as required for the next generation PC applica-

tions. The US3027 is designed to use either Bipolar

transistors for Vout3(1.5V) and Vout4(1.8V) or if Vaux

pin is connected to 12V, then MOSFETs can also be

used as external pass elements. No external resis-

tor divider is necessary for any of the regulators.

The switching regulator feature a patented topology that

in combination with a few external components as shown

in the typical application circuit ,will provide well in ex-

cess 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 .The US3027 also fea-

tures, loss less current sensing for both switcher by

using the Rds-on of the high side Power MOSFET

as the sensing resistor, an output under voltage

shutdown that detects short circuit condition for the

linear outputs and latches the system off, and a

Power Good window comparator that switches its open

collector output low when any one of the outputs is out-

side of a pre programmed window.

28 pin Plastic SOIC WB

3027app3-1.0

Package

PRELIMINARY DATASHEET

Vout1

Vout4

US3027

4-1

Related parts for US3027CW

US3027CW Summary of contents

Page 1

... Power Good window comparator that switches its open collector output low when any one of the outputs is out- side of a pre programmed window. LINEAR CONTROL SWITCHER CONTROL US3027 LINEAR LINEAR CONTROL CONTROL 3027app3-1.0 Device Package US3027CW 28 pin Plastic SOIC WB US3027 PRELIMINARY DATASHEET Vout1 Vout4 4-1 ...

Page 2

US3027 ABSOLUTE MAXIMUM RATINGS ABSOLUTE MAXIMUM RATINGS V5 supply Voltage ........................................... 7V V12 Supply Voltage ............................................ 20V Storage Temperature Range ................................. -65 TO 150 C Operating Junction Temperature Range .......... 0 TO 125 C PACKAGE INFORMATION PACKAGE INFORMATION 28 PIN ...

Page 3

Error Comparator Section Input bias current Input Offset Voltage Delay to Output Current Limit Section C.S Threshold Set Current C.S Comp Offset Voltage Hiccup Duty Cycle Output Drivers Section Rise Time Fall Time Dead band Time Between High side and ...

Page 4

US3027 Note 1: Vs refers to the set point voltage given in Table ...

Page 5

Pin Description PIN# PIN SYMBOL This pin is internally connected to the undervoltage and overvoltage comparators sensing 22 Vsen1 the Vcore status. It must be connected directly to the Vcore supply. This pin provides the feedback for the AGP linear ...

Page 6

US3027 BLOCK DIAGRAM BLOCK DIAGRAM V12 Enable V5 UVLO SD Vsen1 PGood Vsen3 Vsen4 Fix Vaux Drive4 R 1.26V 3R Drive3 Select R 3R Drive2 Vsen2 Figure 1 - Simplified block diagram of the US3027. 4-6 1.17Vset Over Vset Enable ...

Page 7

TYPICAL APPLICATION TYPICAL APPLICATION 12V L1 5V C15 C1 Type Detect R1 Vcc3 C18 C22 Q10 Vout2 1.5V / 3.3V C25 Q12 Vout4 1.8V C37 Figure 2 - Typical application of US3027 for the AMD Slot A socket Rev. 1.3 ...

Page 8

US3027 US3007 Application Parts List Dual Layout with HIP6019 Ref Desig Description Q1,6 Transistor Q2,3,4 MOSFET Q5,11 Transistor Q7,8,9 MOSFET Q10 MOSFET Q12 MOSFET D1 Diode L1 Inductor L2,3 Inductor C1 Capacitor, Ceramic C9 Capacitor, Electrolytic C15 Capacitor, Electrolytic C16 ...

Related keywords

US3027CW datasheet
US3027CW data sheet
US3027CW pdf datasheet
US3027CW component
US3027CW part
US3027CW distributor
US3027CW RoHS
US3027CW datasheet download