TPS40077_15 Datasheet, PDF (1/45 Pages) Texas Instruments – HIGH-EFFICIENCY, MIDRANGE-INPUT, SYNCHRONOUS BUCK CONTROLLER WITH VOLTAGE FEED-FORWARD

TPS40077
www.ti.com ..................................................................................................................................................... SLUS714D – JANUARY 2007 – REVISED APRIL 2009
HIGH-EFFICIENCY, MIDRANGE-INPUT, SYNCHRONOUS
BUCK CONTROLLER WITH VOLTAGE FEED-FORWARD
FEATURES
1
•23 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. . . . . . . . . . . . . . . . . . . . . . . . . . . 36
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.
VDD
Powergood
V_OUT
TPS40077PWP
1 KFF
ILIM 16
2 _RT
VDD ¹⁵
3 LVPB BOOST 14
4 PGD HDRV 13
5 SGND
SW 12
6 SS
DBP 11
7 FB
LDRV 10
8 COMP PGND 9
VDD
V_OUT
UDG-09041
1
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.
2
All other trademarks are the property of their respective owners.
3
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 © 2007–2009, Texas Instruments Incorporated