SC417/SC427

2

RTON

154K

Ω

SC417/SC427

FB

1

FBL

2

V5V

3

AGND

4

VOUT

5

VIN

6

VLDO

7

BST

8

17

18

19

20

21

PGND 22

LX 23

LX

24

AGND

PAD 1

LX PAD 3

RILIM

7.5K

Ω

RLDO2

10K

Ω

RLDO1

56.2K

Ω

CIN

22μF

RGND

0

100nF

CBST

0.1μF

VIN

+12V

Note:

V5V is tied to VLDO

PGND

PGND

PGND

PGND

PGND

A separate 5V supply for the

SC417/SC427 is not required

if VLDO is used to power the

device.

+

10nF

CFF

100pF

RFB1

11K

Ω

L1

0.88μH

RFB2

10K

Ω

VOUT

1.05V @ 10A, 250kHz

COUT1

220μF

15m

Ω

ENABLE/

PSAVE

ENABLE

LDO

All other small signal components (resistors and capacitors) are standard SMT devices.

Component

Value

Manufacturer

Part Number

Web

CIN

22μF/25V

Murata

GRM32ER61E226KE15L

www.murata.com

www.panasonic.com

COUT1, COUT2

220μF/15m

Ω/6.3V

Panasonic

EEFUE0J221R

www.vishay.com

L1

0.88μH/20A

Vishay

IHLP4040DZERR88M11

Key Components

+

COUT2

15m

Ω

220μF

PGOOD

1μF

Typical Application Circuit