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.