LTC1148CS datasheet(6/20 Pages) LINER

Part #	LTC1148CS

Description	High Efficiency Synchronous Step-Down Switching Regulators

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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6

LTC1148

LTC1148-3.3/LTC1148-5

114835fd

+

–

1

P-DRIVE

14

3VIN

12 PGND

N-DRIVE

R

S

Q

C

25mV TO 150mV

6

13k

ITH

1.25V

10

5

REFERENCE

SHUTDOWN

INTVCC

VOS

V

G

8

SENSE+

9

ADJUSTABLE

VERSION

VFB

100k

5pF

VTH1

T

–

+

VTH2

S

SLEEP

11

SGND

4

CT

OFF-TIME

CONTROL

VIN

SENSE–

VFB

SENSE–

7

LTC1148 • FD

FU CTIO AL DIAGRA

Pin 9 connection shown for LTC1148-3.3 and LTC1148-5; changes create LTC1148.

TEST CIRCUIT

+

1

2

3

4

5

6

7

14

13

12

11

10

9

8

P-DRIVE

NC

VIN

CT

INTVCC

ITH

SENSE–

N-DRIVE

NC

PGND

SGND

SHUTDOWN

NC (VFB)

SENSE+

1000pF

V7

TO

V8

+

V10

RSENSE

0.05Ω

75k

25k

100pF

VOUT

440µF

50µH

1µF

IRFZ34

1N5818

330µF

+

IRF9Z34

+

VIN

+

V7

1k

3300pF

10nF

390pF

LTC1148

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LTC1148CS Datasheet(PDF) 6 Page - Linear Technology

LTC1148CS Datasheet(HTML) 6 Page - Linear Technology

Similar Part No. - LTC1148CS

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