12

 2005 Semtech Corp.

www.semtech.com

POWER MANAGEMENT

SC4614

Applications Information (Cont.)

TTTTTypical Application Schematics with 25V In

ypical Application Schematics with 25V In

ypical Application Schematics with 25V In

ypical Application Schematics with 25V In

ypical Application Schematics with 25V Input

put

put

put

put

Bill of Materials (25V Input)

Bill of Materials (25V Input)

Bill of Materials (25V Input)

Bill of Materials (25V Input)

Bill of Materials (25V Input)

Item

Quantity Reference

Part

Vendor

1

1

C4

10uF/35V

Murata

2

1

C7

10uF/6.3V

Vishay

3

1

C3

1800uF/35V

Rubycon

4

1

C6

1500uF/6.3V

Rubycon, MBZ

5

3

C15,C17,C18

1uF

Vishay

6

1

C9

2.2nF

Vishay

71

C13

2.2nF

Vishay

8

1

C8

4.7nF

Vishay

9

1

C10

1nF

Vishay

10

1

D1

D1N4148

Any

11

1

D2

BZX84B16LT1

ON Semi

12

1

L1

2.2uH

Cooper Electr. Tech

13

2

Q3,Q1

IRLR7821

IR

14

1

Rcc

732

Vishay

15

1

Rlimit

3.3k

Vishay

16

1

R4

499k

Vishay

17

1

R8

301

Vishay

18

1

R11

1R0

Vishay

19

1

R12

22k

Vishay

20

1

R15

2.43k

Vishay

21

1

R13

22k

Vishay

22

1

U1

SC4614

SEMTECH

Rcc

732

0

L1

2.2uH

1

2

R12

22k

C9

2.2nF

Q1

IRLR7821

C13

2.2nF

5V /10A

0

R8

301

0

C8

4.7nF

Rli mit

3.3k

C18

1uF

0

D1

D1N4148

R13

22k

R4

499k

Vin=25V

U1

SC4614

1

2

3

4

7

8

9

10

5

6

BST

OCS

COMP

FB

VCC

DL

PN

DH

GND

DRV

R15

2.43k

Q3

IRLR7821

C17

1uF

0

1800uF

C4

10uF

C10

1nF

D2

BZX84B16LT1

C15

1uF

0

1800uF

Note: Zener diode D2 is required when Vin is 18V or higher.

C7

10uF

R11

1R0