Datasheet Analog Devices LTC4362-2 — Datenblatt

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 …

LTC4362-1/LTC4362-2
1.2A Overvoltage/
Overcurrent Protector
FEATURES DESCRIPTION n The LTCВ®4362 monolithic overvoltage/overcurrent protector safeguards 2.5V to 5.5V systems from power supply
overvoltage. It is designed for portable devices with multiple
power supply options including wall adaptors, car battery
adaptors and USB ports. 2.5V to 5.5V Operation
Overvoltage Protection Up to 28V
Internal 40mО© N-Channel MOSFET and 31mО© RSENSE
Avalanche Rated MOSFET Requires No Input
Capacitor or TVS for Most Applications 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.
436212fa 6 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 …