TPS54372_16 Datasheet, PDF (1/21 Pages) Texas Instruments – 3-A OUTPUT TRACKING/TERMINATION SYNCHRONOUS PWM SWITCHER WITH INTEGRATED FETs

Typical Size
6,4 mm X 6,6 mm
TPS54372
www.ti.com
SLVS430D – JUNE 2002 – REVISED FEBRUARY 2005
3-A OUTPUT TRACKING/TERMINATION SYNCHRONOUS PWM SWITCHER WITH
INTEGRATED FETs (SWIFT™)
FEATURES
• Tracks Externally Applied Reference Voltage
• 60-mΩ MOSFET Switches for High Efficiency
at 3-A Continuous Output Source or Sink
Current
• 6% to 90% V_I Output Tracking Range
• Wide PWM Frequency: Fixed 350 kHz or
Adjustable 280 kHz to 700 kHz
• Load Protected by Peak Current Limit and
Thermal Shutdown
• Integrated Solution Reduces Board Area and
Total Cost
APPLICATIONS
• DDR Memory Termination Voltage
• Active Termination of GTL and SSTL
High-Speed Logic Families
• DAC Controlled, High-Current Output Stage
• Precision Point-of-Load Power Supply
DESCRIPTION
As a member of the SWIFT™ family of dc/dc regu-
lators, the TPS54372 low-input voltage, high-output
current, synchronous-buck PWM converter integrates
all required active components. Included on the
substrate with the listed features are a true, high
performance, voltage error amplifier that enables
maximum performance under transient conditions
and flexibility in choosing the output filter L and C
components; an undervoltage-lockout circuit to pre-
vent start-up until the input voltage reaches 3 V; an
internally and externally set slow-start circuit to limit
in-rush currents; and a status output to indicate valid
operating conditions.
The TPS54372 is available in a thermally enhanced
20-pin TSSOP (PWP) PowerPAD™ package, which
eliminates bulky heatsinks. TI provides evaluation
modules and the SWIFT™ designer software tool to
aid in quickly achieving high-performance power
supply designs to meet aggressive equipment devel-
opment cycles.
SIMPLIFIED SCHEMATIC
VDDQ
Input
SIMPLIFIED SCHEMATIC
VIN
PH
TPS54372
BOOT
PGND
REFIN
VBIAS
COMP
AGND ^VSENSE
VTTQ
Compensation
Network
TRANSIENT RESPONSE
V_I = 5 V,
V_O = 1.25 V
0 A to
2.25 A
t − Time − 25 ms/div
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.
SWIFT, PowerPAD are trademarks of Texas Instruments.
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 © 2002–2005, Texas Instruments Incorporated