TPS2553-Q1 power-distribution switch is intended for applications where precision current limiting
is required or heavy capacitive loads and short circuits are encountered. It provides up to 1.5 A
of continuous load current. This device offers a programmable current-limit threshold between 75 mA
and 1.7 A (typical) via an external resistor. Current-limit accuracy as tight as ±6% can be
achieved at the higher current-limit settings. The power-switch rise and fall times are controlled
to minimize current surges during turn on and off.
The TPS2553-Q1 device limits the output current to a safe level by using a
constant-current mode when the output load exceeds the current-limit threshold. An internal
reverse-voltage comparator disables the power switch when the output voltage is driven higher than
the input to protect devices on the input side of the switch. The FAULT
output asserts low during overcurrent and reverse-voltage conditions.
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