20

LT1170/LT1171/LT1172

©LINEAR TECHNOLOGY CORPORATION 1991

117012fe LT/TP 1299 2K REV E • PRINTED IN USA

Linear Technology Corporation

PART NUMBER

DESCRIPTION

COMMENTS

LT1070/LT1071/LT1072

5A/2.5A/1.25A High Efficiency Switching Regulators

LT1074/LT1076

5.5A/2A Step-Down Switching Regulators

100kHz, Also for Positive-to-Negative Conversion

LT1082

1A, High Voltage, High Efficiency Switching Regulator

LT1268/LT1268B

7.5A, 150kHz Switching Regulators

LT1269/LT1271

4A High Efficiency Switching Regulators

LT1270/LT1270A

8A and 10A High Efficiency Switching Regulators

LT1370

500kHz High Efficiency 6A Switching Regulator

High Power Boost, Flyback, SEPIC

LT1371

500kHz High Efficiency 3A Switching Regulator

Good for Boost, Flyback, Inverting, SEPIC

LT1372/LT1377

500kHz and 1MHz High Efficiency 1.5A Switching Regulators

Directly Regulates

LT1373

250kHz Low Supply Current High Efficiency 1.5A Switching Regulator

Low 1mA Quiescent Current

LT1374

4A, 500kHz Step-Down Switching Regulator

LT1375/LT1376

1.5A, 500kHz Step-Down Switching Regulators

Up to 1.25A Out from an SO-8

LT1425

Isolated Flyback Switching Regulator

6W Output,

±5% Regulation,

No Optocoupler Needed

LT1507

500kHz Monolithic Buck Mode Switching Regulator

1.5A Switch, Good for 5V to 3.3V

LT1533

Ultralow Noise 1A Switching Regulator

Push-Pull, <100

RELATED PARTS

Positive Current Boosted Buck Converter

1170/1/2 TA18

C1

0.33

µF

470

Ω

2W

R7

1k

28V

R3

680

Ω

LT1170

FB

1: N

D2

R2

1.24k

C3

0.47

µF

D1

5V, 10A

N

≈ 0.25

R4

1.24k

GND

C5*

100

µF

R6

470

Ω

C6

0.002

µF

–

+

C4

0.01

µF

7

6

4

8

200pF

2

3

R5

5k

R1

5k

C2

5000

µF

* REQUIRED IF INPUT LEADS

≥ 2"

LM308

+

+

TYPICAL APPLICATIO