Synchronous-Buck PWM Switcher - Texas Instruments
Description
Typical Size (6,3 mm x 6,4 mm)
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TPS54310-Q1
SGLS280D − JANUARY 2005 − REVISED JUNE 2009
3-V TO 6-V INPUT, 3-A OUTPUT SYNCHRONOUS-BUCK PWM SWITCHER WITH INTEGRATED FETs (SWIFT)
FEATURES D Qualified for Automotive Applications D 60-mΩ MOSFET Switches for High Efficiency
at 3-A Continuous Output Source or Sink Current
D 0.
9-V to 3.
3-V Adjustable Output Voltage With
1% Accuracy
D Externally Compensated for Design Flexibility D Fast Transient Response D Wide PWM Frequency: Fixed 350 kHz,
550 kHz, or Adjustable 280 kHz to 700 kHz
D Load Protected by Peak Current Limit and
Thermal Shutdown
D Integrated Solution Reduces Board Area and
Total Cost
APPLICATIONS D Point of Load Regulation for High
Performance DSPs, FPGAs, ASICs, and Microprocessors
D Automotive Systems
− Navigation Units − Entertainment Modules − Satellite Radio
D Industrial High-Density Systems With Power
Distributed at 5 V or 3.
3 V
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.
Texas Instruments 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.
ORDERING INFORMATION{
PACKAGED DEVICES
TJ
OUTPUT VOLTAGE
PLASTIC HTSSOP
(PWP)}§
−40°C to 125°C
Adjustable down to 0.
9 V
TPS5431...
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