LT1676 View Datasheet(PDF) - Linear Technology

Part Name

Description

MFG CO.

LT1676

Wide Input Range, High Efficiency, Step-Down Switching Regulator

Linear Technology 

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LT1676

TYPICAL APPLICATION

Minimum Inductor Size Application

VIN

12V TO

48V

+ C1

12µF

63V

5

1

VIN

2

SHDN VCC

C5

100pF

3

VSW

LT1676

6 SYNC

7

FB

8

VC

GND

4

L1 +

D1 220µH

C2

100µF

10V

C3

2200pF

X7R

R3

22k

5%

C4

100pF

R1

36.5k

1%

R2

12.1k

1%

VOUT

5V

0mA to 150mA

1676 TA02

C1: PANASONIC HFQ

D1: MOTOROLA 100V, 1A, SMD SCHOTTKY

C2: AVX D CASE TPSD107M010R0080

MBRS1100 (T3)

C4, C5: X7R OR COG/NPO

L1: COILCRAFT DO1608C-224

FOR 3.3V VOUT VERSION:

IOUT: 0mA TO 200mA

L1: 150µH, DO1608C-154

R1: 24.3K, R2: 14.7k

RELATED PARTS

PART NUMBER

LT1076

LT1149

LT1176

LT1339

LT1375/LT1376

LT1620

LT1776

LT1777

DESCRIPTION

2A, 100kHz Step-Down Switching Regulator

High Efficiency Synchronous Step-Down Switching Regulator

1.2A, 100kHz Step-Down Switching Regulator

High Power Synchronous DC/DC Controller

1.5A, 500kHz Step-Down Switching Regulators

Rail-to-Rail Current Sense Amplifier

Wide Input Range, High Efficiency, Step-Down

Switching Regulator

Low Noise Buck Regulator

COMMENTS

Operation Up to 45V Input (64V for HV Version)

Operation Up to 48V Input, 95% Efficiency, 100% Duty Cycle

Operation Up to 38V Input, Adjustable and Fixed 5V Versions

Operation Up to 60V, High Power Anti-Shoot-Through Drivers

Operation Up to 25V Input, Synchronizable (LT1375)

Transforms Switching Regulators Into High Efficiency

Battery Chargers

LT1676 with 200kHz Switching Frequency (High Current

Applications Generally Restricted to ≤ 40V)

Operation up to 48V, Controlled Voltage and Current Slew Rates

16 Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408)432-1900 q FAX:(408)434-0507 q www.linear-tech.com

1676f LT/TP 0499 4K • PRINTED IN USA

© LINEAR TECHNOLOGY CORPORATION 1998

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