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SC1109EVB

更新时间： 2024-11-07 22:25:55

品牌	Logo	应用领域
商升特 - SEMTECH		控制器
页数	文件大小	规格书
17页	222K
描述
SYNCHRONOUS PWM CONTROLLER WITH DUAL LOW DROPOUT REGULATOR CONTROLLERS

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数据手册

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SC1109EVB 数据手册

SYNCHRONOUS PWM CONTROLLER WITH

DUAL LOW DROPOUT REGULATOR

CONTROLLERS

SC1109

PRELIMINARY - October 16, 2000

DESCRIPTION

FEATURES

The SC1109 was designed for the latest high

speed motherboards. It combines a synchronous

voltage mode controller (switching section) with

two low-dropout linear regulator controllers. The

voltage mode controller provides the power

supply for the system AGTL bus. The 1.8V and

2.5V linear controllers power the Chipset and

clock circuitry.

1.8V, 2.5V linear controllers

LDOs track input voltage within 200mV until

regulation

Integrated drivers

Power Good Signal

Soft Start

Lossless Current Sense

APPLICATIONS

The SC1109 switching section features lossless

current sensing and latched driver outputs for

enhanced noise immunity. It operates at a fixed

frequency of 200kHz, the output voltage is

internally fixed at 1.2V

Pentium^®III Motherboards

Triple power supplies

ORDERING INFORMATION

The SC1109 linear sections are low dropout

regulators designed to track the 3.3V power

supply when it turns on or off.

Linear

Voltage

Temp.

Range (T_J)

Part Number⁽¹⁾

Package

SC1109CSTR

SC1109EVB

Note:

SO-16 1.8V/2.5V 0° to 125°C

Evaluation Board

(1) Only available in tape and reel packaging. A reel

contains 1000 devices.

TYPICAL APPLICATION CIRCUIT

12V IN

5V STBY

5V IN

0.1uF

2x1500uF

0.1uF

SC1109CS

VCC

STBY

0.1uF

BCAP+

BST

R1 2.2

R2 2.2

0.1uF

L1 4uH

1.2V 6A

BCAP-

SS/EN

PWRGD

PHASE

VTT

3x1500uF

0.1uF

POWER GOOD

VOSENSE GND

0.1uF

GATE2

LDOS2

GATE1

LDOS1

3.3V IN

C10

330uF

2.5V

1.8V

C11

330uF

C12

330uF

Pentium is a registered trademark of Intel Corporation

TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com

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SC110DPR	MSPI	获取价格	Voltage Rating 30 to 120 VAC/DC
SC110DR	MSPI	获取价格	Voltage Rating 30 to 120 VAC/DC
SC110EJR	MSPI	获取价格	Voltage Rating 30 to 120 VAC/DC
SC110FJR	MSPI	获取价格	Voltage Rating 30 to 120 VAC/DC
SC110FKR	MSPI	获取价格	Voltage Rating 30 to 120 VAC/DC
SC110FPR	MSPI	获取价格	Voltage Rating 30 to 120 VAC/DC
SC110HJR	MSPI	获取价格	Voltage Rating 30 to 120 VAC/DC
SC110HR	MSPI	获取价格	Voltage Rating 30 to 120 VAC/DC
SC110JR	MSPI	获取价格	Voltage Rating 30 to 120 VAC/DC