Datasheet Richtek RT1720 — Datenblatt

RT1720
60V Hot Swap Controller with Fault Timer
General Description
The RT1720 is an over-voltage and over-current
protection circuit. It monitors a circuit’s input voltage
and current with its adjustable over-voltage and
over-current thresholds and drives an external
N-MOSFET switch to connect the input to the output
voltage only when it is safe. Its wide input voltage
range makes it useful for high-voltage applications and
in systems that experience large transient voltages and
currents, such as automotive, telecom, and industrial The RT1720 features include, open-drain fault and applications. During over-voltage events, the RT1720 quickly
reduces the gate drive of the external MOSFET to
regulate the output voltage at the level chosen by its
external FB resistors. During over-current events, when
the load draws excessive current, the RT1720 reduces
the gate drive to regulate the output current at the level
set by its external current sense resistor. In both cases
the output voltage or current is linearly regulated,
thermally stressing the MOSFET load switch. However,
an externally-adjustable timer limits the duration of power-good outputs, and a shutdown input.
The RT1720 is available in the MSOP-10 package. Features Wide Input Operation Range : 5V to 80V
Negative Input Voltage Rating to −60V …