Typical Size
(6,4 mm X 9,7 mm )
www.ti.com
TPS54672
SLVS397C − JULY 2001 − REVISED FEBRUARY 2005
6 A 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
D
D
D
D
Efficiency at 6-A Continuous Output Source
or Sink Current
6% to 90% VIN Output Tracking Range
PWM Frequency Range:
Fixed 350 kHz or Adjustable 280 to 700 kHz
Load Protected by Peak Current Limit and
Thermal Shutdown
Integrated Solution Reduces Board Area and
Component Count
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.
APPLICATIONS
D
DDR Memory Termination Voltage
D
Active Termination of GTL and STL
D
D
High-Speed Logic Families
DAC Controlled High Current Output Stage
Precision Point of Load Power Supply
SIMPLIFIED SCHEMATIC
Typical DDR Memory Termination Regulator Circuit
Input Voltage
3V−6V
VIN
CIN
CIN
ENA
PH
COUT
BOOT
PGND
TPS54672
REFIN
VBIAS VSENSE
AGND COMP
CBIAS
10
µs/div
Output Current
(2A/div)
LOAD TRANSIENT RESPONSE
Output Voltage
(50 mV/div AC Coupled)
0.56
µH
VTTQ
CBOOT
VDDQ
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
TI [ TEXAS INSTRUMENTS ]
