TPS40055-EP Datasheet, PDF (1/36 Pages) Texas Instruments – WIDE-INPUT SYNCHRONOUS BUCK CONTROLLER

TPS40055-EP
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www.ti.com
SGLS310D – JULY 2005 – REVISED FEBRUARY 2012
WIDE-INPUT SYNCHRONOUS BUCK CONTROLLER
Check for Samples: TPS40055-EP
FEATURES
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•2 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 (θ_JC = 25°C/W)
• Thermal Shutdown
• Externally Synchronizable
• Programmable High-Side Sense Short-Circuit
Protection
• Programmable Closed-Loop Soft-Start
• TPS40055 Source/Sink
SUPPORTS DEFENSE, AEROSPACE,
AND MEDICAL APPLICATIONS
• Controlled Baseline
• One Assembly/Test Site
• One Fabrication Site
• Available in Military (–55°C/125°C)
Temperature Range⁽¹⁾
• Extended Product Life Cycle
• Extended Product-Change Notification
• Product Traceability
(1) Additional temperature ranges available - contact factory
APPLICATIONS
• Power Modules
• Networking/Telecom
• Industrial/Servers
DESCRIPTION
The TPS40055 is a family of high-voltage, wide input
(8 V to 40 V), synchronous, step-down converters.
The TPS40055 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 TPS40055 are also synchronizable to an external
supply. The TPS40055 incorporates 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 TPS40055 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 a hiccup mode
operation utilizing an internal fault counter for longer
duration overloads.
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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.
PowerPAD is a trademark of Texas Instruments.
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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 © 2005–2012, Texas Instruments Incorporated