ILC6371 데이터 시트보기 (PDF) - Fairchild Semiconductor

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ILC6371

SOT-89 Step up Switching Regulator with Shutdown

Fairchild Semiconductor 

www.fairchildsemi.com

ILC6370

SOT-89 Step up Switching Regulator with Shutdown

Features

• 85% efficiency at 50mA

• Start-up voltages as low as 900mV

• ±2.5% accurate outputs

• Complete switcher design with only 3 external

components

• 50, 100 and 180kHz switching frequency versions

available

• Shutdown to 0.5µ

• External transistor option allows several hundred

milliamp switcher design

Applications

• Cellular Phones, Pagers

• Portable Cameras and Video Recorders

• Palmtops and PDAs

Description

50mA boost converter in 5-lead SOT-89 package. Only 3

external components are needed to complete the switcher

design, and frequency options of 50, 100, and 180kHz gives

the designer the ability to trade off system needs with

switcher design size.

87% max duty cycle gives conversion efficiencies of 85%.

Standard voltage options of 2.5V, 3.3V, and 5.0V at ±2.5%

accuracy feature on-chip phase compensation and soft-start

design.

ILC6371 drives an external transistor for higher current

switcher design, with all of the features and benefits of the

ILC6370.

Block Diagram

LX

VSS

EXT

CE

VLX LIMITER

BUFFER

PWM Controlled

OSC

50/100/180KHz

Slow Start

Vref

Phase comp

VDD

-

CHIP ENABLE

+

VDD is internally connected to the OUT pin.

VOUT

Pin Assignments

VSS

LX

5

4

SOT -89-5

(TOP VIEW)

1

2

3

N/C VOUT CE

ILC6370

VSS

EXT

5

4

SOT -89-5

(TOP VIEW)

1

2

3

N/C VOUT CE

ILC6371

Rev. 1.4

©2001 Fairchild Semiconductor Corporation

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