Typical Size
(6,3 mm x 6,4 mm)
www.ti.com
TPS54310
SLVS412A – DECEMBER 2001 – REVISED JUNE 2002
3-V TO 6-V INPUT, 3-A OUTPUT SYNCHRONOUS-BUCK PWM
SWITCHER WITH INTEGRATED FETs (SWIFT)
FEATURES
D
60-mΩ MOSFET Switches for High Efficiency
D
D
D
D
D
D
at 3-A Continuous Output Source or Sink
Current
0.9-V to 3.3-V Adjustable Output Voltage With
1% Accuracy
Externally Compensated for Design Flexibility
Fast Transient Response
Wide PWM Frequency: Fixed 350 kHz, 550
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
DESCRIPTION
As members of the SWIFT family of dc/dc regulators,
the TPS54310 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 provides high performance
under transient conditions; an undervoltage-lockout
circuit to prevent start-up until the input voltage reaches
3 V; an internally and externally set slow-start circuit to
limit in-rush currents; and a power good output useful
for processor/logic reset, fault signaling, and supply
sequencing.
The TPS54310 device 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
development cycles.
APPLICATIONS
D
Low-Voltage, High-Density Systems With
D
D
D
Power Distributed at 5 V or 3.3 V
Point of Load Regulation for High
Performance DSPs, FPGAs, ASICs, and
Microprocessors
Broadband, Networking and Optical
Communications Infrastructure
Portable Computing/Notebook PCs
Simplified Schematic
Input
VIN
PH
BOOT
PGND
Output
EFFICIENCY
vs
LOAD CURRENT
96
94
92
Efficiency – %
90
88
86
84
TPS54310
COMP
VBIAS
VSENSE
AGND
Compensation
Network
82
80
0
TA = 25°C
VI = 5 V
VO = 3.3 V
0.5
1
1.5
2
2.5
3
Load Current – A
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.
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
2002, Texas Instruments Incorporated
TI [ TEXAS INSTRUMENTS ]
