1 Features

1• Integrated 26 mΩ and 19 mΩ MOSFETs

• Split Power Rail: 1.6 V to 17 V on PVIN

• 200-kHz to 1.6-MHz Switching Frequency

• Synchronizes to External Clock

• 0.8 V ±1% Voltage Reference Overtemperature

• Low 2-μA Shutdown Quiescent Current

• Monotonic Start-Up into Prebiased Outputs

• –40°C to 150°C Operating Junction Temperature

Range

• Adjustable Slow Start and Power Sequencing

• Power Good Output Monitor for Undervoltage and

Overvoltage

• Adjustable Input Undervoltage Lockout

• For SWIFT™ Documentation, Visit

http://www.ti.com/swift

• Create a Custom Design Using the TPS54620

With the WEBENCH Power Designer

2 Applications

• High Density Distributed Power Systems

• High Performance Point of Load Regulation

• Broadband, Networking and Optical

Communications Infrastructure

3 Description

The TPS54620 in thermally enhanced 3.50 mm ×

3.50 mm QFN package is a full featured 17-V, 6-A,

synchronous, step-down converter which is optimized

for small designs through high efficiency and

integrating the high-side and low-side MOSFETs.

Further space savings are achieved through current

mode control, which reduces component count, and

by selecting a high switching frequency, reducing the

footprint of the inductor.

The output voltage start-up ramp is controlled by the

SS/TR pin which allows operation as either a standalone

power supply or in tracking situations. Power

sequencing is also possible by correctly configuring

the enable and the open-drain power good pins.

Cycle-by-cycle current limiting on the high-side FET

protects the device in overload situations and is

enhanced by a low-side sourcing current limit which

prevents current runaway. There is also a low-side

sinking current limit that turns off the low-side

MOSFET to prevent excessive reverse current.

Thermal shutdown disables the part when die

temperature exceeds thermal shutdown temperature.