TPS54620RGYR Power Path Management IC Switching Voltage Regulators 4.5-17Vin 6A Synch St Down SWIFT Cnvtr

1 Features

• 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 SWIFTTM Documentation, Visit

  http://www.ti.com/swift

• Create a Custom Design Using the TPS54620 With the WEBENCH Power Designer

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 stand- alone 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.