TPS54620 SLVS949C –MAY 2009–REVISED MAY 2011 4.5V to 17V Input, 6A Synchronous Step Down SWIFT™ Converter

TPS54620
SLVS949C –MAY 2009–REVISED MAY 2011
4.5V to 17V Input, 6A Synchronous Step Down SWIFT™ Converter

1FEATURES
• Integrated 26mΩ / 19mΩ MOSFETs
• Split Power Rail: 1.6V to 17V on PVIN
• 200kHz to 1.6MHz Switching Frequency
• Synchronizes to External Clock
• 0.8V ±1% Voltage Reference Over Temperature
• Low 2uA Shutdown Quiescent Current
• Monotonic Start-Up into Pre-biased Outputs
• –40°C to 150°C Operating Junction
Temperature Range
• Adjustable Slow Start/Power Sequencing
• Power Good Output Monitor for Undervoltage
and Overvoltage

• Adjustable Input Undervoltage Lockout
• Supported by SwitcherPro™ Software Tool
• For SWIFT™ Documentation and
SwitcherPro™, visit http://www.ti.com/swift
APPLICATIONS
• High Density Distributed Power Systems
• High Performance Point of Load Regulation
• Broadband, Networking and Optical
Communications Infrastructure

DESCRIPTION
The TPS54620 in thermally enhanced 3.5mm x 3.5mm QFN package is a full featured 17V, 6A 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 inductor's footprint.
The output voltage startup 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
which turns off the low-side MOSFET to prevent excessive reverse current. Thermal shutdown disables the part
when die temperature exceeds thermal shutdown temperature.
WHITE SPACE

Click here to download Texas Instruments TI pdf datasheet TPS54620 SLVS949C –MAY 2009–REVISED MAY 2011 4.5V to 17V Input, 6A Synchronous Step Down SWIFT™ Converter

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