The TPS54821RHLT is a synchronous Step-down Converter with hiccup current limit. It 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.
● Synchronizes to external clock
● Monotonic start-up into pre-biased outputs
● Adjustable slow start/power sequencing
● Power good output monitor for undervoltage and overvoltage
● Adjustable input undervoltage lockout
● Integrated 26/19mR MOSFETs
● 0.6V ±1% Voltage reference over temperature
● 2µA Low shutdown quiescent current
● Green product and no Sb/Br
