The TPS54335-2A synchronous converter with an input-voltage range of 4.5 V to 28
V. This device has an integrated low-side switching FET that eliminates the need for an
external diode which reduces component count.
Efficiency is maximized through the integrated 128-mΩ and 84-mΩ
MOSFETs, low IQ and pulse skipping at light loads. Using the enable pin, the
shutdown supply current is reduced to 2 μA. This step-down (buck) converter provides accurate
regulation for a variety of loads with a well-regulated voltage reference that is 1.5% over
Cycle-by-cycle current limiting on the high-side MOSFET protects the TPS54335-2A in overload situations and is enhanced by a low-side
sourcing current limit which prevents current runaway. A low-side sinking current-limit turns off
the low-side MOSFET to prevent excessive reverse current. Hiccup protection is triggered if the
overcurrent condition continues for longer than the preset time. Thermal shutdown disables the
device when the die temperature exceeds the threshold and enables the device again after the
built-in thermal hiccup time.
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