SC2688STR

更新时间： 2024-09-15 04:05:27

品牌	Logo	应用领域
商升特 - SEMTECH		转换器控制器
页数	文件大小	规格书
12页	235K
描述
Programmable Synchronous DC/DC Converter, Dual LDO Controller

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SC2688STR 数据手册

SC2688

Programmable Synchronous DC/DC

Converter, Dual LDO Controller

POWER MANAGEMENT

Features

Description

The SC2688 combines a synchronous voltage mode

controller with two low-dropout linear regulators

providing most of the circuitry necessary to implement three

DC/DC converters for powering advanced microprocessors

such as Pentium^®III.

·Synchronous design, enables no heatsink solution

95% efficiency (switching section)

Designed for embedded Pentium^®III requirements

1.5V, 2.5V short circuit protected linear controllers

Applications

Embedded Pentium^®III microprocessor supplies.

The SC2688 switching section features latched drive out-

put for enhanced noise immunity, pulse by pulse current

limiting and logic compatible shutdown. The SC2688

switching section operates at a fixed frequency of 140kHz,

providing an optimum compromise between size, efficiency

and cost in the intended application areas.

The SC2688 linear sections are low dropout regulators

with short circuit protection, supplying 1.5V for GTL bus

and 2.5V for non-GTL I/O.

Typical Application Circuit

12V

0.1uF

47uF

1500uF

BST

VCC

CS+

CS-

0.1uF

2R2

LDOEN

0.1uF

1.00k

2.32k

2R2

VCC_CORE

1.9uH

AGND

LDOV

GATE2

LDOS2

SC2688S

5mOhm

PGND

GATE1

LDOS1

0.1uF

3.3V

1500uF

1.5V

2.5V

330uF

www.semtech.com

Revision: March 25, 2004

12 3 4 5 6 7...12

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