Datasheet > SC1101_05

SC1101_05

更新时间： 2024-09-30 04:05:35

品牌	Logo	应用领域
商升特 - SEMTECH		控制器
页数	文件大小	规格书
7页	182K
描述
Asynchronous Voltage Mode PWM Controller

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SC1101_05 数据手册

SC1101

Asynchronous Voltage

Mode PWM Controller

POWER MANAGEMENT

Features

Description

The SC1101 is a versatile, low-cost, voltage-mode PWM Low cost / small size

controller designed for low output voltage DC/DC power

supply applications. A simple, fixed-voltage buck

regulator can be implemented using the SC1101 with a

minimum of external components. Internal level shift and

drive circuitry eliminates the need for an expensive

p-channel, high-side switch. The small device footprint

allows for compact circuit design.

Switch mode efficiency up to 95%

1% reference voltage accuracy

Over current protection

500mA output drive

SO-8 package

SC1101 features include a temperature compensated

voltage reference, triangle wave oscillator, current limit

comparator, frequency shift over-current protection, and

an internally compensated error amplifier. Pulse by pulse

current limiting is implemented by sensing the

Applications

Pentium® P55 Core Supply

Low Cost Microprocessor Supplies

Peripheral Card Supplies

differential voltage across an external resistor, or an Industrial Power Supplies

appropriately sized PC board trace.

High Density DC/DC Conversion

The SC1101 operates at a fixed frequency of 200kHz,

providing an optimum compromise between efficiency,

external component size, and cost.

Typical Application Circuit

Vout = 2V @ 10A

4uH

0.05

IRLR3103

+5V

76.8 *see note

C11

1.0

330/2.5V

C10

330/2.5V

1.0

MBRD1035L

127

150/6.3V

GND

+12V

SC1101

0.01

2.2

VCC

GND

CS(-)

CS(+)

PGND

0.001

0.1

BST

0.1

* NOTE:

R6 = R7 x (Vout/1.25 - 1) rounded to nearest 1%value

www.semtech.com

Revision: May 25, 2005

12 3 4 5 6 7

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