TPS40052
8
SLUS563B − AUGUST 2003 − REVISED APRIL 2004
WIDE INPUT SYNCHRONOUS,
BUCK CONTROLLER
FEATURES
D
Operating Input Voltage 10 V to 40 V
D
Programmable Fixed-Frequency Up to
D
D
D
D
D
D
100 kHz to 1 MHz Voltage Mode Controller
Internal Gate Drive Outputs for High-Side
and Synchronous N-Channel MOSFETs
16-Pin PowerPADt Package (θ
JC
= 2°C/W)
Thermal Shutdown
Externally Synchronizable
Programmable Short-Circuit Protection
Programmable Closed-Loop Soft-Start
DESCRIPTION
The TPS40052 is part of a family of high-voltage,
wide input, synchronous, step-down converters.
The TPS40052 offers design flexibility with a
variety of user programmable functions, including
soft-start, operating frequency, high-side current
limit, and loop compensation.
The TPS40052 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.
APPLICATIONS
D
DDR Tracking Regulators
D
Power Modules
D
Networking Equipment
D
Industrial Servers
SIMPLIFIED APPLICATION DIAGRAM
+
TPS40052PWP
SYNC
ILIM
RT
BP5
VIN
BOOST
VIN
−
1
2
3
16
15
14
13
12
+
11
10
9
−
VTT
DDR
VDDQ
4
5
6
7
8
EA_REF HDRV
SGND
SS
VFB
SW
BP10
LDRV
COMP
PGND
PAD
UDG−03080
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.
Copyright
1999 − 2003, Texas Instruments Incorporated
www.ti.com
1
TI [ TEXAS INSTRUMENTS ]
