TPS40100_15 Datasheet, PDF (1/40 Pages) Texas Instruments – MIDRANGE INPUT SYNCHRONOUS BUCK CONTROLLER WITH ADVANCED SEQUENCING AND OUTPUT MARGINING

TPS40100
www.ti.com
SLUS601 – MAY 2005
MIDRANGE INPUT SYNCHRONOUS BUCK CONTROLLER
WITH ADVANCED SEQUENCING AND OUTPUT MARGINING
FEATURES
• Operation over 4.5 V to 18 V Input Range
• Adjustable Frequency (Between 100 kHz and
600 kHz) Current Feedback Control
• Output Voltage Range From 0.7 V to 5.5 V
• Simultaneous, Ratiometric and Sequential
Startup Sequencing
• Adaptive Gate Drive
• Remote Sensing (Via Separate GND/PGND)
• Internal Gate Drivers for N-channel MOSFETs
• Internal 5-V Regulator
• 24-Pin QFN Package
• Thermal Shutdown
• Programmable Overcurrent Protection
• Power Good Indicator
• 1%, 690-mV Reference
• Output Margining, 3% and 5%
• Programmable UVLO (with Programmable
Hysteresis)
• Frequency Synchronization
APPLICATIONS
• Servers
• Networking Equipment
• Cable Modems and Routers
• XDSL Modems and Routers
• Set-Top Boxes
• Telecommunications Equipment
• Power Supply Modules
DESCRIPTION
The TPS40100 is a mid voltage, wide-input (between
4.5 V and 18 V), synchronous, step-down controller.
The TPS40100 offers programmable closed loop
soft-start, programmable UVLO (with programmable
hysteresis), programmable inductor sensed current
limit and can be synchronized to other timebases.
The TPS40100 incorporates MOSFET gate drivers
for external N-channel high-side and synchronous
rectifier (SR) MOSFET. Gate drive logic incorporates
adaptive anti-cross conduction circuitry for improved
efficiency, reducing both cross conduction and diode
conduction in the rectifier MOSFET. The externally
programmable current limit provides a hiccup
overcurrent recovery characteristic.
TYPICAL APPLICATION
24 23 22 21 20 19
V_IN
1 COMP
VDD 18
2 FB
SW 17
V_IN
V_TRKIN
3 TRKOUT
4 TRKIN
5 UVLO
TPS40100
HDRV 16
BST 15
5VBP 14
6 ILIM
LDRV 13
7 8 9 10 11 12
UDG−04137
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.
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, Texas Instruments Incorporated