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FEATURES

60-mΩ MOSFET Switches for High Efficiency

at 3-A Continuous Output Source or Sink

Current

Disabled Current Sinking During Start-Up

Adjustable Output Voltage Down to 0.9 V

With 1.0% Accuracy

Wide PWM Frequency:

Fixed 350 kHz, 550 kHz or

Adjustable 280 kHz to 700 kHz

Synchronizable to 700 kHz

Load Protected by Peak Current Limit and

Thermal Shutdown

Integrated Solution Reduces Board Area and

Component Count

APPLICATIONS

Low-Voltage, High-Density Distributed Power

Systems

Point of Load Regulation for

High-Performance DSPs, FPGAs, ASICs, and

Microprocessors

Broadband, Networking, and Optical

Communications Infrastructure

Power PC Series Processors

DESCRIPTION

As a member of the SWIFT? family of dc/dc regulators,

the TPS54373 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 and flexibility in choosing the output filter

L and C components; an undervoltage-lockout circuit to

prevent start-up until the input voltage reaches 3 V; an

internally or 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.

For reliable power up in output precharge applications,

the TPS54373 is designed to only source current during

start-up.

The TPS54373 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.