TPS54521RHLR

The TPS54521RHLR is a synchronous Step-down Converter optimized for small designs through high efficiency and integrated 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. Hiccup protection will be triggered if the overcurrent condition has persisted for longer than the preset time. Thermal shutdown disables the part when die temperature exceeds thermal shutdown temperature.

• Synchronizes to external clock
• Hiccup overcurrent protection
• Monotonic start-up into prebiased outputs
• Pin-to-pin compatible with the TPS54620
• Adjustable slow start/power sequencing
• Power good output for undervoltage and overvoltage monitoring
• Adjustable input undervoltage lockout
• Supported by SwitcherPro™ software tool
• Integrated 57/50mΩ MOSFETs
• 0.8V Voltage reference
• 2µA Low shutdown quiescent current
• Green product and no Sb/Br