SIC414 Datasheet, PDF (1/24 Pages) Vishay Siliconix – microBUCK SiC414 6 A, 28 V Integrated Buck Regulator with 5 V LDO

SiC414, SiC424
Vishay Siliconix
6 A, microBUCK^® SiC414, SiC424
Integrated Buck Regulator with 5 V LDO
DESCRIPTION
The Vishay Siliconix SiC414 and SiC424 are an advanced
stand-alone synchronous buck regulator featuring integrated
power MOSFETs, bootstrap switch, and an internal 5 V_LDO
in a space-saving PowerPAK MLP44-28L package.
The SiC414 and SiC424 are 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 and
used to drive external n-channel MOSFETs or other loads.
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 SiC414 and SiC424 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
0.75 V to 5.5 V
200 kHz to 1 MHz
6A
95 %
PowerPAK MLP44-28L
FEATURES
• High efficiency > 95 %
• 6 A continuous output current capability
• Integrated bootstrap switch
• Integrated 5 V/200 mA LDO with bypass logic
• Temperature compensated current limit
• Pseudo fixed-frequency adaptive on-time
control
• All ceramic solution enabled
• Programmable input UVLO threshold
• Independent enable pin for switcher and LDO
• Selectable ultrasonic power-save mode (SiC414)
• Selectable power-save mode (SiC424)
• Internal soft-start and soft-shutdown
• 1 % internal reference voltage
• Power good output and over voltage protection
• 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 OPTION
LDO_EN
VOUT
EN/PSV (Tri-State)
3.3 V
PGOOD
28 27 26 25 24 23 22
1 FB
LX 21
2 V5V
3 ^AGND
PAD1
AGND
LX 20
PGND 19
VIN
4 ^VOUT
PAD3
LX
PGND 18
5 ^VIN
6 VLDO
PAD2
VIN
PGND 17
PGND 16
7 BST
LX 15
8 9 10 11 12 13 14
VOUT
Document Number: 63388
For technical questions, contact: [e-mail]
www.vishay.com
S13-0248-Rev. B, 04-Feb-13
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