TPS54672 Datasheet, PDF (1/20 Pages) Texas Instruments – 6-A OUTPUT ACTIVE BUS TERMINATION SYNCHRONOUS PWM SWITCHER WITH INTEGRATED FETs(SWIFT)

www.ti.com
Typical Size
(6,4 mm X 9,7 mm )
TPS54672
SLVS397C − JULY 2001 − REVISED FEBRUARY 2005
6ĆA OUTPUT ACTIVE BUS TERMINATION SYNCHRONOUS PWM
SWITCHER WITH INTEGRATED FETs (SWIFT)
FEATURES
D Tracks Externally Applied Reference Voltage
D 30-mΩ, 12-A Peak MOSFET Switches for High
Efficiency at 6-A Continuous Output Source
or Sink Current
D 6% to 90% VIN Output Tracking Range
D PWM Frequency Range:
Fixed 350 kHz or Adjustable 280 to 700 kHz
D Load Protected by Peak Current Limit and
Thermal Shutdown
D Integrated Solution Reduces Board Area and
Component Count
APPLICATIONS
D DDR Memory Termination Voltage
D Active Termination of GTL and STL
High-Speed Logic Families
D DAC Controlled High Current Output Stage
D Precision Point of Load Power Supply
SIMPLIFIED SCHEMATIC
DESCRIPTION
As a member of the SWIFT family of dc/dc regulators, the
TPS54672 active bus termination synchronous 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 and flexibility in choosing the
output filter L and C components; an under-voltage-
lockout circuit to prevent start-up until the input voltage
reaches 3 V; a slow-start control to limit in-rush currents;
and a status output to indicate valid operating conditions.
The TPS54672 is available in a thermally enhanced 28-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 development cycles.
Typical DDR Memory Termination Regulator Circuit
Input Voltage
3V−6V
CIN
CIN
VDDQ
VIN
PH
ENA
BOOT
PGND
TPS54672
0.56 µH
CBOOT
VTTQ
COUT
CBIAS
REFIN
VBIAS ^VSENSE
AGND COMP
LOAD TRANSIENT RESPONSE
Output Voltage
(50 mV/div AC Coupled)
Output Current
(2A/div)
10 µs/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.
PowerPAD and SWIFT are trademarks of Texas Instruments.
PRODUCT PREVIEW information concerns products in the formative or design
phase of development. Characteristic data and other specifications are design
goals. Texas Instruments reserves the right to change or discontinue these
products without notice.
Copyright  2001−2005, Texas Instruments Incorporated