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
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