Datasheet > SC1112_06

SC1112_06

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
商升特 - SEMTECH		稳压器控制器
页数	文件大小	规格书
23页	354K
描述
Triple Low Dropout Regulator Controllers

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SC1112_06 数据手册

SC1112

Triple Low Dropout

Regulator Controllers

POWER MANAGEMENT

Features

Description

The SC1112 was designed for the latest high speed

motherboards. It includes three low dropout regulator con-

trollers. The controllers provide the power for the system

AGTL bus Termination Voltage, Chipset, and clock circuitry.

Triple linear controllers

Selectable and adjustable output voltages

LDOs track input voltage within 200mV (Function of

the MOSFETs used) until regulation

Integrated charge pump

An adjustable controller with a 1.2V reference is available,

while two selectable outputs are provided for the VTT

(1.25 V or 1.5V, SC1112) or (1.2V or 1.5V, SC1112A)

and the AGP (1.5V or 3.3V). The SC1112 low dropout

regulators are designed to track the 3.3V power supply

as the VTTIN supply is cycled On and Off. A latched short

circuit protection is also available for the VTT output.

Programmable power good delay signal

Latched over current protection (VTT)

Pb-free package available, fully WEEE and RoHS

compliant

Applications

Pentium^®III Motherboards

Triple power supplies

Other features include an integrated charge pump that

provides adequate gate drives for the external MOSFETs,

and a capacitive programable delay for the power good

signal.

Typical Application Circuit

+3.3V

VTT

+5V STBY

10u

SC1112/A

POWER GOOD

0.1u

5VSTBY

ADJGATE

ADJSEN

CAP-

GND

AGPGATE

AGPSEN

VTTGATE

VTTSEN

AGPSEL

VTTSEL

VTTIN

330u

C14

330u

AGP

VTT

ADJ

0.1u

C11

C2 C18

330u

C16

C17

0.1u

330u

CAP+

C10

DELAY

PWRGD

22n

C19

330u

C13

0.1u

C12

330u

0.1u

VTT SELECT Signal

AGP SELECT Signal

www.semtech.com

Revision: August 30, 2006

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