20

LTC1148

LTC1148-3.3/LTC1148-5

© LINEAR TECHNOLOGY CORPORATION 1993

114835fc LT/GP 1098 2K REV C • PRINTED IN USA

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

1

2

3

4

5

6

7

14

13

12

11

10

9

8

P-DRIVE

NC

N-DRIVE

NC

PGND

SGND

SHUTDOWN

NC

LTC1148HV-5

1

µF

1000pF

0.01

Ω

SHUTDOWN

*L

33

µH

N-CH

IRFZ44

D1

1N5818

VN2222LL

+

2700

µF

35V

×2

10V TO 18V

2200

µF

16V

×3

5V/8A

3300pF

510

Ω

820pF

LTC1148 • F18

MUR110

N-CH

IRFZ44

470nF

220

Ω

220

Ω

20k

1N4148

22k

100

Ω

100

Ω

*COILTRONICS CTX33-10-KM

**DALE LVR-3-0.01

2N3906

2N2222

Figure 18. All N-Channel 5V/8A High Efficiency Regulator

(Burst Mode Operation Suppressed)

Figure 19. All N-Channel 5V/8A Efficiency

LOAD CURRENT (A)

0.1

60

70

80

100

110

LTC1148 • F19

90

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For additional high efficiency application

circuits, see Application Notes 54, 58 and 66