Description
The TPS54622RHLR device in thermally enhanced 3.5-mm× 3.5-mm VQFN package is a full-featured 17-V,6-A synchronous step-down converter optimized for smalldesigns 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 that prevents current runaway. There is also a low-sidesinking current limit that turns off the low-side MOSFET to prevent excessive reverse current.Hiccup protection is triggered if the overcurrent condition has persisted for longer than the presettime. Thermal hiccup protection disables the device when the die temperature exceeds the thermal shutdown temperature and enables the part again after the built-in thermal shutdown hiccup time.
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
• 0.6V ±1% Voltage Reference Overtemperature
• Hiccup Current Limit
• 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 TPS54622 With the WEBENCH® Power Designer
Applications
• High-Density Distributed Power Systems
• High-Performance Point-of-Load Regulation
• Broadband, Networking, and Optical
Communications Infrastructure
Feature
- Integrated 26-m? and 19-m? MOSFETs
- Split Power Rail: 1.6 V to 17 V onPVIN
- 200-kHz to 1.6-MHz Switching Frequency
- Synchronizes toExternal Clock
- 0.6V ±1% Voltage ReferenceOvertemperature
- Hiccup Current Limit
- Monotonic Start-Up IntoPrebiased Outputs
- –40°C to 150°C Operating Junction TemperatureRange
- Adjustable Slow Start and Power Sequencing
- Power GoodOutput Monitor for Undervoltage and Overvoltage
- Adjustable Input UndervoltageLockout
- For SWIFT? Documentation, visithttp://www.ti.com/swift
- Create a Custom Design Using the TPS54622 With theWEBENCH? Power Designer
All trademarks are the property of their respective owners.
DescriptionThe TPS54622 device in thermally enhanced 3.5-mm × 3.5-mm VQFN package is a full-featured17-V, 6-A synchronous step-down converter optimized for small designs through high efficiency andintegrating the high-side and low-side MOSFETs. Further space savings are achieved through currentmode control, which reduces component count, and by selecting a high switching frequency, reducingthe footprint of the inductor.
The output voltage start-up ramp is controlled by the SS/TR pin, which allows operationas either a stand-alone power supply or in tracking situations. Power sequencing is also possibleby 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 overloadsituations and is enhanced by a low-side sourcing current limit that prevents current runaway.There is also a low-side sinking current limit that turns off the low-side MOSFET to preventexcessive reverse current. Hiccup protection is triggered if the overcurrent condition haspersisted for longer than the preset time. Thermal hiccup protection disables the device when thedie temperature exceeds the thermal shutdown temperature and enables the part again after thebuilt-in thermal shutdown hiccup time.
(Picture: Pinout)
