TPS40071PWPRG4 Datasheet, PDF (1/30 Pages) Texas Instruments – HIGH-EFFICIENCY MIDRANGE INPUT SYNCHRONOUS BUCK CONTROLLER WITH VOLTAGE FEED-FORWARD

TPS40070
TPS40071
www.ti.com .................................................................................................................................................. SLUS582J – DECEMBER 2003 – REVISED APRIL 2009
HIGH-EFFICIENCY MIDRANGE INPUT SYNCHRONOUS
BUCK CONTROLLER WITH VOLTAGE FEED-FORWARD
FEATURES
1
•2 Operation Over 4.5-V to 28-V Input Range
• Programmable Fixed-Frequency up to 1-MHz
Voltage-Mode Controller
• Predictive Gate Drive™ With Anti-Cross
Conduction Circuitry
• <1% Internal 700-mV Reference
• Internal Gate Drive Outputs for High-Side and
Synchronous N-Channel MOSFETs
• 16-Pin PowerPAD™ Package
• Thermal Shutdown Protection
• TPS40070: Source Only
• TPS40071: Source/Sink
• Programmable High-Side Sense Short Circuit
Protection
APPLICATIONS
• Power Modules
• Networking/Telecom
• PCI Express
• Industrial
• Servers
SIMPLIFIED APPLICATION DIAGRAM
DESCRIPTION
The TPS4007x is a mid voltage, wide input (4.5 V to
28 V), synchronous, step-down converter.
The TPS4007x offers design flexibility with a variety
of user programmable functions, including; soft-start,
UVLO, operating frequency, voltage feed-forward and
high-side FET sensed short circuit protection.
The TPS4007x incorporates MOSFET gate drivers for
external N-channel high-side and synchronous
rectifier (SR) MOSFETs. Gate drive logic incorporates
predictive anti-cross conduction circuitry to prevent
simultaneous high-side and synchronous rectifier
conduction, while minimizing to eliminating current
flow in the body diode of the SR FET. The TPS40071
allows the supply output to sink current at all times.
The TPS40070 implements a source-only power
supply.
V_OUT
V_DD
Powergood
TPS40070PWP
1 KFF
ILIM 16
2 _RT
VDD 15
3 LVBP BOOST 14
4 PGD HDRV 13
5 SGND
SW 12
6 SS
DBP 11
7 FB
LDRV 10
8 COMP PGND 9
V_DD
V_OUT
VDG−03170
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Predictive Gate Drive, PowerPAD are trademarks of Texas Instruments.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2003–2009, Texas Instruments Incorporated