The TPS54341 device is a 42-V, 3.5-A step-down regulator with an integrated high-side
MOSFET. The device survives load-dump pulses up to 45 V 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 152 µA. Shutdown supply current is reduced to 2 µA when the enable
pin is pulled low.
Undervoltage lockout is internally set at 4.3 V but can increase using an external
resistor divider at the enable pin. The output voltage startup 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 the 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.
The TPS54341 device is available in a 10-pin 4-mm × 4-mm WSON package.
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