SIC403A_13 Datasheet, PDF (2/25 Pages) Vishay Siliconix – 6 A microBUCK SiC403A/B Integrated Buck Regulator with Programmable LDO

SiC403A, SiC403BCD
Vishay Siliconix
FUNCTIONAL BLOCK DIAGRAM
VDD
AGND D
VDD
Reference
SS 7
Soft Start
PGOOD
26
EN/PSV
29
Control & Status
VDD
FB 1
TON 31
VOUT ²
VDD 3
FBL 5
FB Comparator
On- time
Generator
Gate Drive
Control
Bypass Comparator
VDD
A
Y
B
VLDO Switchover MUX
LDO
Zero Cross Detector
Valley Current Limit
VIN
Bootstrap
Switch
VIN
A
VIN
8 BST
DL
VDD
DL
12 NC
Hi-side
MOSFET
B LX
13 LXBST
28 LXS
Lo-side
MOSFET
C PGND
27 ILIM
14 NC
32
ENL
A = connected to pins 6, 9-11, PAD 2
B = connected to pins 23-25, PAD 3
C = connected to pins 15-22
D = connect to pins 4, 30, PAD 1
SiC403A/B Functional Block Diagram
PIN CONFIGURATION
FB 1
V_OUT 2
V_DD 3
A_GND 4
FBL 5
V_IN 6
SS 7
BST 8
32 31 30 29 28 27 26 25
PAD 1
A_GND
PAD 2
V_IN
PAD 3
LX
24 LX
23 LX
22 PGND
21 P_GND
20 PGND
19 P_GND
18 PGND
17 ^PGND
SiC403A/B Pin Configuration (Top View)
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Document Number: 62768
2
S12-1972-Rev. A, 27-Aug-12
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