SIC403A_13 Datasheet, PDF (1/25 Pages) Vishay Siliconix – 6 A microBUCK SiC403A/B Integrated Buck Regulator with Programmable LDO

SiC403A, SiC403BCD
Vishay Siliconix
6 A microBUCK^® SiC403A/B
Integrated Buck Regulator with Programmable LDO
DESCRIPTION
The Vishay Siliconix SiC403A/B an advanced stand-alone
synchronous buck regulator featuring integrated power
MOSFETs, bootstrap switch, and a programmable LDO in a
space-saving PowerPAK MLP55-32L pin packages.
The SiC403A/B is capable of operating with all ceramic
solutions and switching frequencies up to 1 MHz. The
programmable frequency, synchronous operation and
selectable power-save allow operation at high efficiency
across the full range of load current. The internal LDO may
be used to supply 5 V for the gate drive circuits or it may be
bypassed with an external 5 V for optimum efficiency.
Additional features include cycle-by-cycle current limit,
voltage soft-start, under-voltage protection, programmable
over-current protection, soft shutdown and selectable
power-save. The Vishay Siliconix SiC403A/B also provides
an enable input and a power good output.
PRODUCT SUMMARY
Input Voltage Range
Output Voltage Range
Operating Frequency
Continuous Output Current
Peak Efficiency
Package
3 V to 28 V
0.6 V to 5.5 V
200 kHz to 1 MHz
6A
93 %
PowerPAK MLP55-32L
FEATURES
• High efficiency > 93 %
• 6 A continuous output current capability
• Integrated bootstrap switch
• Programmable 200 mA LDO with bypass logic
• Temperature compensated current limit
• All ceramic solution enabled
• Pseudo fixed-frequency adaptive on-time control
• Programmable input UVLO threshold
• Independent enable pin for switcher and LDO
• Selectable ultra-sonic power-save mode (SiC403A)
• Selectable power-save mode (SiC403B)
• Programmable soft-start
• 1 % internal reference voltage
• Power good output
• Over-voltage and under-voltage protections
• Material categorization: For definitions of compliance
please see www.vishay.com/doc?99912
APPLICATIONS
• Notebook, desktop and server computers
• Digital HDTV and digital consumer applications
• Networking and telecommunication equipment
• Printers, DSL, and STB applications
• Embedded applications
• Point of load power supplies
TYPICAL APPLICATION CIRCUIT AND PACKAGE OPTIONS
VOUT
EN/PSV (Tri-State)
LDO_EN
PGOOD
32 31 30 29 28 27 26 25
FB ₁
LX
24
VOUT
2
PAD 1
LX
23
VDD
3
AGND
PGND
22
AGND
4
PAD 3
21 ^PGND
VIN
FBL
5
VIN ₆
PAD 2
LX
20 ^PGND
19 ^PGND
SS ₇
VIN
18 ^PGND
BST ₈
17 ^PGND
VOUT
Typical Application Circuit for SiC403A/B (PowerPAK MLP5x5-32L)
Document Number: 62768
For technical questions, contact: [e-mail]
www.vishay.com
S12-1972-Rev. A, 27-Aug-12
1
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