TPS40056 Datasheet, PDF (1/31 Pages) Texas Instruments – WIDE-INPUT SYNCHRONOUS, TRACKING BUCK CONTROLLER

TPS40056
8
WIDEĆINPUT SYNCHRONOUS, TRACKING
BUCK CONTROLLER
SLVS612 − APRIL 2006
FEATURES
D Operating Input Voltage 10 V to 40 V
D Output Voltage Tracks External Reference
D Programmable Fixed-Frequency Up to
100 kHz to 1 MHz Voltage Mode Controller
D Internal Gate Drive Outputs for High-Side
and Synchronous N-Channel MOSFETs
D Externally Synchronizable
D Programmable Short-Circuit Protection
D Thermal Shutdown
D 16-Pin PowerPADt Package (θ_JC = 2°C/W)
D Programmable Closed-Loop Soft-Start
APPLICATIONS
D DDR Tracking Regulators
D Power Modules
D Networking Equipment
D Industrial Servers
SIMPLIFIED APPLICATION DIAGRAM
CONTENTS
Device Ratings
2
Electrical Characteristics
3
Terminal Information
5
Application Information
7
Design Example
22
Additional References
29
DESCRIPTION
The TPS40056 is part of a family of high-voltage,
wide input, synchronous, step-down converters.
The TPS40056 offers design flexibility with a
variety of user programmable functions, including
soft-start, operating frequency, high-side current
limit, and loop compensation. The TPS40056 is
also synchronizable to an external supply. It
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 externally programmable short
circuit protection provides pulse-by-pulse current
limit, as well as hiccup mode operation utilizing an
internal fault counter for longer duration
overloads.
+
VIN
−
VTRKIN
TPS40056PWP
1 SYNC ILIM 16
2 RT
VIN 15
3 BP5 BOOST 14
4 EA_REF HDRV 13
5 SGND
SW 12
6 SS
BP10 11
7 VFB
LDRV 10
8 COMP PGND 9
PAD
+
VTT
−
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
www.ti.com
UDG−03080
Copyright  2006, Texas Instruments Incorporated
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