The TPS54561DPRT is a 5A Step-down DC-DC Converter with soft-start and Eco-mode™. The device survives load dump pulses up to 65V per ISO 7637. Current-mode control provides simple external compensation and flexible component selection. A low-ripple pulse-skip mode reduces the no-load supply current to 152µA. Shutdown supply current is reduced to 2µA when the enable pin is pulled low. Under-voltage lockout is internally set at 4.3V but can increase using an external resistor-divider at the enable pin. The output voltage start up ramp is controlled by the soft start pin that can also be configured for sequencing/tracking. An open drain power good signal indicates the output is within 93 to 106% of its nominal voltage. A wide adjustable switching-frequency range allows for optimization of either efficiency or external component size. Cycle-by-cycle current limit, frequency foldback and thermal shutdown protects internal and external components during an overload condition.
● High efficiency at light loads with a pulse-skipping Eco-mode™
● 87mR High-side MOSFET
● 152µA Operating quiescent current and 2µA shutdown current
● 100kHz to 2.5MHz Adjustable switching frequency
● Synchronizes to external clock
● Low dropout at light loads with integrated BOOT recharge FET
● Adjustable UVLO voltage and hysteresis
● UV and OV power-good output
● Adjustable soft start and sequencing
● 0.8V 1% Internal voltage reference
● Green product and no Sb/Br
●This device has limited built-in ESD protection, leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.
