SC2677BITSTRT View Datasheet(PDF) - Semtech Corporation

Part Name

Description

MFG CO.

SC2677BITSTRT

Dual Synchronous Voltage Mode Controller with Current Sharing Circuitry

Semtech Corporation 

POWER MANAGEMENT

Evaluation Schematic (Cont.)

Single output, Current share Mode

SC2677B

+3.3V

C1

C4

4.7uF

M1

IPD09N03LA

C6

1uF

CS1-

CS1+

(1)

R51

5.76K

C63

VP1

220nF

R50

6.34K L1

2uH

DCR=4mohm

R1

1.0

M3

C21

C9 C10

4.7uF 4.7uF

C19 C20

1nF

Vout1

1.4V@20A

D1

D2

+12V

+5V

+12V

R9

10.0K

R11

10.0K

R12

Q1 300

Q2

C28

1uF

Enable

PWRGD

R13

4.64k

Enable/Disable

Circuit (option)

R19

U1

5.9K

R5

7.5K

C24

0.1uF C25

1uF

SC2677B

C23

1uF

C26

47nF

R14

8.06K

C33

33nF

R21

2.1K

R8

1.78K

R10

1.00K

C36

0.1uF

R22

VP2

R24

2.32K

4.87K

VP1 C35

C37 R26

220nF

C38

4.3K

1uF

Vout

R31

Vout

2.2

C39

1uF

D5

M5

IPD09N03LA

CS2-

CS2+

VP2

(1)

C62

220nF

R48

3K

L2

2uH

DCR=4mohm

C40 C43

4.7uF

D3

C59

1N4148

1uF

D4

1N4148

R35

1.0

M7

C60

1nF

C47 C46 C56 C57

R36

0R0

Note (1) : Current Scale. Master channel current w eighting factor is around 0.68 * Io, Slaver is around 0.32 * Io

© 2009 Semtech Corp.

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