Document Number: 63835

S12-2109-Rev. C, 03-Sep-12

www.vishay.com

3

Vishay Siliconix

SiC401A, SiC401BCD

This document is subject to change without notice.

Format:

LINE 1: P/N

LINE 2: Siliconix logo + Lot code + ESD symbol

LINE 3: Factory code + Year code + Work week code

PIN DESCRIPTION

Pin Number

Symbol

Description

1FB

Feedback input for switching regulator used to program the output voltage - connect to an external

When using an external power supply as the bias for the IC, the LDO output should be disabled.

4, 30, PAD 1

Analog ground

5FBL

Feedback input for the internal LDO - used to program the LDO output. Connect to an external

6, 9 to 11, PAD 2

Input supply voltage

7

SS

The soft start ramp will be programmed by an internal current source charging a capacitor on this pin.

8BST

Bootstrap pin - connect a capacitor of at least 100 nF from BST to LX to develop the floating supply

for the high-side gate drive.

12, 14

NC

No connection

13

LXBST

LX Boost - connect to the BST capacitor.

23 to 25, PAD3

LX

Switching (phase) node

15 to 22

Power ground

26

Open-drain power good indicator - high impedance indicates power is good. An external pull-up

resistor is required.

27

28

LXS

29

EN/PSV

mode.

31

32

ENL

ORDERING INFORMATION

Part Number

Package

Marking (Line 1: P/N)

SiC401ACD-T1-GE3

PowerPAK MLP55-32L

SiC401A

SiC401BCD-T1-GE3

PowerPAK MLP55-32L

SiC401B

SiC401DB

Reference board