LTC4360-1/LTC4360-2

1

436012f

TYPICAL APPLICATION

DESCRIPTION

Overvoltage Protection

Controller

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.

The LTC4360 controls an external N-channel MOSFET in

series with the input power supply. During overvoltage

transients, the LTC4360 turns off the MOSFET within 1μs,

isolating downstream components from the input supply.

Inductive cable transients are absorbed by the MOSFET

and load capacitance. In most applications, the LTC4360

provides protection from transients up to 80V without

requiring transient voltage suppressors or other external

components.

The LTC4360 has a delayed start-up and an adjustable dV/dt

ramp-up for inrush current limiting. A PWRGD pin provides

age condition, the LTC4360 automatically restarts with a

start-up delay. The LTC4360-1 features a soft shutdown

controlled by the ON pin, while the LTC4360-2 controls an

optional external P-channel MOSFET for negative voltage

protection.

Output Protected from Overvoltage at Input

FEATURES

APPLICATIONS

Applications

GATE

Si1470DH

IN

436012 TA01a

5V

1.5A

5V

LTC4360-1

ON

OUT

PWRGD

GND

Protection from Overvoltage

10V/DIV

5V/DIV

0.5μs/DIV

436012 TA01b

Si1470DH

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