Datasheet > US3018CW

US3018CW

更新时间： 2024-09-16 22:17:07

品牌	Logo	应用领域
UNISEM		控制器
页数	文件大小	规格书
17页	111K
描述
5 BIT PROGRAMMABLE SYNCHRONOUS BUCK PLUS LDO CONTROLLER AND 200mA LDO ON BOARD

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中文翻译

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数据手册

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US3018CW 数据手册

US3018

5 BIT PROGRAMMABLE SYNCHRONOUS BUCK PLUS

LDO CONTROLLER AND 200mA LDO ON BOARD

PRELIMINARY DATASHEET

FEATURES

DESCRIPTION

Provides Single Chip Solution for Vcore, GTL+ The US3018 controller IC is specifically designed to meet

& Clock Supply

Intel specification for Pentium IIä microprocessor ap-

200 mA On board LDO regulator

plications as well as the next generation of P6 family

Designed to meet the latest Intel specification processors. The US3018 provides a single chip con-

for Pentium IIä troller IC for the Vcore , LDO controller for GTL+

On board DAC programs the output voltage and an internal 200mA regulator for clock supply

from 1.3V to 3.5V which are required for the Pentium II applications.

Linear regulator controller on board for 1.5V These devices feature a patented topology that in com-

GTL+ supply bination with a few external components as shown in

Loss less Short Circuit Protection with HICCUP the typical application circuit ,will provide in excess of

Synchronous operation allows maximum effi- 18A of output current for an on- board DC/DC converter

ciency

while automatically providing the right output voltage via

Patented architecture allows fixed frequency the 5 bit internal DAC. The US3018 also features, loss

operation as well as 100% duty cycle during less current sensing for both switchers by using the

dynamic load

Soft Start

Rds-on of the high side Power MOSFET as the sens-

ing resistor, internal current limiting for the clock

High current totem pole driver for direct driv- supply, a Power Good window comparator that switches

ing of the external Power MOSFET

Power Good function Monitors all Outputs

its open collector output low when any one of the out-

puts is outside of a pre programmed window. Other fea-

OVP Circuitry Protects the Switcher Output and tures of the device are ; Undervoltage lockout for both

generates a Fault signal

Thermal Shutdown

Logic Level Enable Input

5V and 12V supplies, an external programmable soft

start function , programming the oscillator frequency via

an external resistor, OVP circuitry for both switcher out-

puts and an internal thermal shutdown.

APPLICATIONS

Total Power Soloution for Pentium II processor

application

TYPICAL APPLICATION

US3018

SWITCHER1

CONTROL

Vout1

3.3V

LINEAR

CONTROL

LINEAR

Vout2

REGULATOR

Vout3

3018app3-1.1

Notes: Pentium II is trade mark of Intel Corp.

PACKAGE ORDER INFORMATION

Ta (°C)

Device

US3018CW

Package

24 pin Plastic SOIC WB

0 TO 70

Rev. 1.4

12/8/00

4-1

12 3 4 5 6 7...17

中文翻译

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