SC1103CSTRT Semtech, SC1103CSTRT Datasheet

SC1103CSTRT

Manufacturer Part Number

SC1103CSTRT

Description

IC, VOLTAGE MODE PWM CTRL, 12V, 8-SOIC

Manufacturer

Semtech

Datasheet

1.SC1103CSTRT.pdf (7 pages)

Specifications of SC1103CSTRT

Input Voltage

12V

Output Voltage

2.5V

Output Current

500mA

Frequency

200kHz

Supply Voltage Range

5V To 12V

Digital Ic Case Style

SOIC

No. Of Pins

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Allchip Electronic(HK) Limited

Part Number:

SC1103CSTRT

Manufacturer:

SEMTECH

Quantity:

14 379

Current page: 1 of 7
Download datasheet (199Kb)

The SC1103 is a versatile, low-cost, voltage-mode PWM

controller designed for 12V input DC/DC power supply

applications. A simple, fixed-voltage buck regulator can

be implemented using the SC1103 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.

SC1103 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

differential voltage across an external resistor, or an

appropriately sized PC board trace.

The SC1103 operates at a fixed frequency of 200kHz,

providing an optimum compromise between efficiency,

external component size, and cost.

POWER MANAGEMENT

Revision: July 28, 2005

Description

Typical Application Circuit

12V to 3.3V @ 10A with “flying capacitor” boost voltage.

+12V

+20V

GND

0.1

* NOTE:

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

1.0

0.001

47/16V

VCC

CS(-)

CS(+)

PGND

47/16V

SC1103

IRLR3103

GND

BST

0.01

0.1

MBRD1035L

6uH

Asynchronous Voltage Mode PWM

Features

Applications

2.2

Low cost / small size

Switch mode efficiency up to 95%

1% reference voltage accuracy

Over current protection

500mA output drive

5V to 12V Input power source

Lead free package available. Fully WEEE and RoHS

compliant

Pentium® P55 Core Supply

Low Cost Microprocessor Supplies

Peripheral Card Supplies

Industrial Power Supplies

High Density DC/DC Conversion

0.05

220/4V

Controller for 12V Input

220/4V

C10

220/4V

C11

1.0

Vout = 2.5V @ 10A

SC1103

www.semtech.com

127*see note

127

GND

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