LTC4362-1/LTC4362-2
1.2A Overvoltage/Overcurrent Protector
FEATURES DESCRIPTION 2.5V to 5.5V Operation
nn Overvoltage Protection Up to 28V
nn Internal 40mΩ N-Channel MOSFET and 31mΩ R
SENSE
nn Avalanche Rated MOSFET Requires No Input
Capacitor or TVS for Most Applications
nn 2.1V), a start-up delay cycle begins. Any
overvoltage condition causes the delay cycle to continue
until a safe voltage is present. When the delay cycle completes, an internal high-side switch driver slowly ramps up
the MOSFET gate, powering up the output at a controlled
rate and limiting the inrush current to the output capacitor.
Rev. B For more information www.analog.com LTC4362-1/LTC4362-2
OPERATION
If the voltage at the IN pin exceeds 5.8V (VIN(OV), the
internal N-channel MOSFET is turned off quickly to protect
the load. The incoming power supply must remain below
5.7V (VOUT(OV) – ΔVOV) for the duration of the start-up
delay to restart the OUT ramp-up.
An internal sense resistor is used to implement an
overcurrent protection with a 1.5A current trip threshold and a 10µs glitch filter. After an overcurrent, the
LTC4362-1 latches off while the LTC4362-2 restarts following a 130ms delay. The LTC4362 has a CMOS compatible ON input. When …