The TPS54540DDA is a 5A Step-down DC-DC Converter with an integrated high side MOSFET and Eco-mode™. The device survives load dump pulses up to 45V 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 146µA. 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 internally controlled to provide a controlled start up and eliminate overshoot. A wide switching frequency range allows either efficiency or external component size to be optimized. Output current is limited cycle-by-cycle. 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™
● 92mR High-side MOSFET
● 146µA 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
● 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.
