microBUCK® PRODUCT FAMILY

SIC401A/B, SIC402A/B, and SIC403A/B

30

40

50

60

70

80

90

100

1

-10

-20

3

5

7

9

11

13

15

I

out (A)

V

in= 12 V, Vout = 3.3 V, 300 kHz

SiC403A/B

6 A

SiC402A/B

10 A

SiC401A/B

15 A

0

10

20

Output Voltage

500 mV/div.

10 ms/div.

Power Good Signal

5 V/div.

10 ms/div.

Input Voltage

5 V/div.

10 ms/div.

LX Switching Node

10 V/div.

10 ms/div.

Output Voltage

500 mV/div.

5 ms/div.

Power Good Signal

5 V/div. 5 ms/div.

Output Current

5 A/div.

5 ms/div.

LX Switching Node

10 V/div. 5 ms/div.

Gate Drive

Control

On-Time

Generator

+

-

Zero Cross

Detector

FB Comparator

Soft Start

Reference

VDD

26

29

AGND

4, 30,

PAD 1

PGOOD

Control and Status

EN/PSV

1

31

2

3

FB

TON

VOUT

Valley1-Limit

Bypass Comparator

A

B

Y

LDO

32 ENL

VIN

VDD

MUX

VDD

DL

27

8

BST

LX

ILIM

PGND

VIN

VIN

VDD

15 to 22

13, 23 to 25,

28, PAD 3

6, 9-11, PAD 2

VDD

5

FBL

7

SS

FUNCTIONAL BLOCK DIAGRAM

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO

SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000

VMN-PL0427-1210

4/12

PRODUCT OVERVIEW

POWER ICS

ON

AND TEC

1 9 6 2 - 2 0 1 2

VI SH AY I N TE R TE C H N O L OGY, I NC .