The TPS54340QDDAQ1 is a 42V 3.5A Step-down 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, regulated output supply current to 146µA. Using the enable pin, shutdown supply current is reduced to 1µA, when the enable pin is low. Under-voltage lockout is internally set at 4.3V but can be increased 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 adjustable frequency range allows for optimization of either efficiency or external component size. 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
IC can be damaged by ESD. We recommend that all ICs be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
