12

 2007 Semtech Corp.

www.semtech.com

POWER MANAGEMENT

SC2621A

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

C1

10uF/35V

Murata

2

1

C9

10uF/6.3V

Vishay

3

1

C4

1500uF/35V

Rubycon

4

1

C10

1500uF/6.3V

Rubycon, MBZ

5

3

C5,C11,C13

1uF

Vishay

6

1

C6,C12

2.2nF

Vishay

7

1

C8

560uF

Sanyo

8

1

C14

4.7nF

Vishay

9

1

C15

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

Q2

SPD14N06

Infineon

15

1

R1

732

Vishay

16

1

R3

3.3k

Vishay

17

1

R4

499k

Vishay

18

1

R6

301

Vishay

19

1

R9

1R0

Vishay

20

1

R10,R15

22k

Vishay

21

1

R11

11.3k

Vishay

22

1

R12

2k

Vishay

23

1

R13

2.43k

Vishay

24

1

U1

SC2621A

SEMTECH

0

C15

1nF

R1

732

C14

4.7nF

R10

22k

+

C8

560uF

R12

2k

0

R4

499k

D1

D1N4148

C9

10uF

Vin=25V

Q1

IRLR7821

C5

1uF

Q2

SPD14N06

R11

11.3k

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

D2

BZX84B16LT1

R9

1R0

3.3V/1A

Q3

IRLR7821

0

C6

2.2nF

5V

C13

1uF

1800uF

1800uF

L1

2.2uH

1

2

R15

22k

U1

SC2621A

1

2

3

4

10

11

12

14

5

13

6

7

9

8

BST

OCS

COMP

FB

DRV

DL

GND

DH

LDOG

PN

LDFB

NC

NC

VCC

5V /10A

0

0

C12

2.2nF

C11

1uF

0

R13

2.43k

R6

301

C1

10uF

R3

3.3k

0