SC4612 데이터 시트보기 (PDF) - Semtech Corporation

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SC4612

Wide Input Range High Performance Synchronous Buck Switching Controller

Semtech Corporation 

SC4612

POWER MANAGEMENT

Application Information (Cont.)

Application Circuit 3: Vin = 12V; Vout = 2.5V @ 12A, Fsw = 800kHz

R1

825k

U1

SC4 612 ML P

1 ILIM

C2

120p

2 OSC

PHASE 12

DH 11

C3

0.1 3

C4

3.3n

R3

10k

4

SS/EN

EAO

BST 10

DRV 9

C5

300p

R4opt

20

C6

1/16V

5 FB

6 VDD

R6

11.0k

DL 8

GND 7

D1

SD107WS

R8

0

C8 R9

2.2/10V 0

Q1

H AT 216 8H

Q2

H AT 216 5H

C9

22/16V _cer

R5

2.74k

C7

R7

2.2n 178

Fsw=800kHz

C14A

47/16V _A L

C14B

47/16V _AL

+

Vin=12V

_

C10

0.1

L1

1.4uH@14A

+

C12A C12B

220/4V _PosCap 220/4V

C13A

N/A

Vout=2.5@12A

C13B

10/6.3V _c e r

_

Efficiency:

SC4612: 12Vin, 2.5Vout @ 12A

100%

98%

96%

94%

92%

90%

88%

86%

84%

82%

80%

0 1 2 3 4 5 6 7 8 9 10 11 12

Current, (A)

 2007 Semtech Corp.

19

www.semtech.com

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