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| TPS40070 Datasheet, PDF (1/20 Pages) Texas Instruments – HIGH-EFFICIANCY MIDRANGE INPUT SYNCHRONOUS BUCK CONTROLLER WITH VOLTAGE FEED-FORWARD | |||
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www.ti.com
TPS40070
TPS40071
SLUS582D â DECEMBER 2003 â REVISED NOVEMBER 2004
HIGH-EFFICIANCY MIDRANGE INPUT SYNCHRONOUS
BUCK CONTROLLER WITH VOLTAGE FEED-FORWARD
FEATURES
⢠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
⢠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 recti-
fier (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.
VOUT
VDD
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
VDD
VOUT
VDGâ03170
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.
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 © 2003â2004, Texas Instruments Incorporated
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