TPS40077 Datasheet, PDF (1/42 Pages) Texas Instruments – HIGH-EFFICIENCY, MIDRANGE-INPUT, SYNCHRONOUS BUCK CONTROLLER WITH VOLTAGE FEED-FORWARD

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TPS40077
SLUS714 – JANUARY 2007
HIGH-EFFICIENCY, 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™
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
• Pre-Bias Compatible
• Power-Stage Shutdown Capability
• Programmable High-Side Sense Short-Circuit
Protection
APPLICATIONS
• Power Modules
• Networking/Telecom
• PCI Express
• Industrial
• Servers
SIMPLIFIED APPLICATION DIAGRAM
CONTENTS
Device Ratings. . . . . . . . . . . . . . . . . . . . . . . . 2
Electrical Characteristics. . . . . . . . . . . . . . . . . 4
Terminal Information. . . . . . . . . . . . . . . . . . . . 11
Application Information. . . . . . . . . . . . . . . . . . 14
Example Applications. . . . . . . . . . . . . . . . . . . 23
References. . . . . . . . . . . . . . . . . . . . . . . . . . . 38
DESCRIPTION
The TPS40077 is a midvoltage, wide-input (4.5-V to
28-V), synchronous, step-down controller, offering
design flexibility for a variety of user-programmable
functions, including soft start, UVLO, operating
frequency, voltage feed-forward, and high-side,
FET-sensed, short-circuit protection.
VOUT
VDD
Powergood
TPS40077PWP
1 KFF
ILIM 16
2 RT
VDD 15
3 LVBP
4 PGD
5 SGND
6 SS
7 FB
8 COMP
BOOST 14
HDRV 13
SW 12
DBP 11
LDRV 10
PGND 9
VDD
VOUT
S0202-01
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.
All other trademarks are the property of their respective owners.
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 © 2007, Texas Instruments Incorporated