TPS40051PWPG4 Datasheet, PDF (1/37 Pages) Texas Instruments – IDE-INPUT SYNCHRONOUS BUCK CONTROLLER

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TPS40050
TPS40051
8
TPS40053
SLUS540F − DECEMBER 2002 − REVISED JUNE 2004
WIDEĆINPUT SYNCHRONOUS
BUCK CONTROLLER
FEATURES
D Operating Input Voltage 8 V to 40 V
D Input Voltage Feed-Forward Compensation
D < 1 % Internal 0.7-V Reference
D Programmable Fixed-Frequency Up to 1 MHz
Voltage Mode Controller
D Internal Gate Drive Outputs for High-Side and
Synchronous N-Channel MOSFETs
D 16-Pin PowerPADt Package (θ_JC = 2°C/W)
D Thermal Shutdown
D Externally Synchronizable
D Programmable High-Side Current Limit
D Programmable Closed-Loop Soft-Start
D TPS40050 Source Only
D TPS40051 Source/Sink
D TPS40053 Source/Sink With V_OUT Prebias
APPLICATIONS
D Power Modules
D Networking/Telecom
D Industrial
D Servers
SIMPLIFIED APPLICATION
DESCRIPTION
The TPS4005x is a family of high-voltage, wide input
(8 V to 40 V), synchronous, step-down converters.
The TPS4005x family offers design flexibility with a
variety of user programmable functions, including
soft-start, UVLO, operating frequency, voltage feed-
forward, high-side current limit, and loop compensation.
The TPS4005x are also synchronizable to an external
supply. They incorporate MOSFET gate drivers for
external N-channel high-side and synchronous rectifier
(SR) MOSFETs. Gate drive logic incorporates
anti-cross conduction circuitry to prevent simultaneous
high-side and synchronous rectifier conduction.
The TPS4005x uses voltage feed-forward control
techniques to provide good line regulation over the wide
(4:1) input voltage range, and fast response to input line
transients with near constant gain with input variation
which eases loop compensation.
The externally programmable current limit provides
pulse-by-pulse current limit, as well as hiccup mode
operation utilizing an internal fault counter for longer
duration overloads.
TPS40050PWP
1 KFF
ILIM 16
2 RT
VIN 15
VIN
3 BP5 BOOST 14
4 SYNC HDRV 13
5 SGND
SW 12
6 SS/SD BP10 11
7 VFB
LDRV 10
8 COMP PGND 9
+
VOUT
−
UDG−02130
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.
PowerPADt is trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date. Products
conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
Copyright  2002, 2004, Texas Instruments Incorporated