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TPS40050Q1TIN/a500avaiWIDE-INPUT SYNCHRONOUS BUCK CONTROLLER


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TPS40050Q1
WIDE-INPUT SYNCHRONOUS BUCK CONTROLLER
FEATURES Qualified for Automotive Applications Operating Input Voltage 8 V to 40 V Input Voltage Feed-Forward Compensation < 1 % Internal 0.7-V Reference Programmable Fixed-Frequency Up to 1 MHz
Voltage Mode Controller
Internal Gate Drive Outputs for High-Side and
Synchronous N-Channel MOSFETs
16-Pin PowerPAD� Package (θJC = 2°C/W) Thermal Shutdown Externally Synchronizable Programmable High-Side Current Limit Programmable Closed-Loop Soft-Start TPS40050 Source Only TPS40051 Source/Sink TPS40053 Source/Sink With VOUT Prebias
APPLICATIONS
Power Modules Networking/Telecom Industrial Servers
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.
ORDERING INFORMATION†
†For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI web site at
http://www.ti.com.
‡Package drawings, thermal data, and symbolization are available at http://www.ti.com/packaging.
§This PWP package is taped and reeled as indicated by the R suffix on the device type (i.e., TPS40050QPWPRQ1). See the application section
of the data sheet for PowerPAD drawing and layout information.
¶See Application Information section, pg. 8
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