描述 Description

The FPF2193, FPF2194, and FPF2195 form a series of load sw itches that provides full protection to systems and loads that may encounter large current conditions. These devices contain a 55 mΩ current-limited P-channel MOSFET that can operate over an input voltage range of 1.8 to 5.5 V. Internally, current is prevented from flow ing w hen the MOSFET is off and the output voltage is higher than the input voltage. Sw itch control is by a logic input (ON) capable of interfacing directly w ith low -voltage control signals. Each part contains thermal shutdow n protection that shuts off the sw itch to prevent damage to the part w hen a continuous over-current condition causes excessive heating.

特性 Features

■ <1.8 to 5.5 V Input Voltage Range

■ Controlled Turn-On

■ 0.1 to 1.5 A Adjustable Current Limit

■ Under-Voltage Lockout

■ Thermal Shutdow n

■ <2 μA Shutdow n Current

■ Auto Restart

■ Fast Current Limit Response Time

■ 5 μs to Moderate Over Currents

■ 30 ns to Hard Shorts

■ Fault Blanking

■ Reverse Current Blocking

Applications

■ PDAs

■ Cell Phones

■ Handheld GPS Devices

■ Portable Enterprise / Industrial Devices

■ Digital Cameras

■ Peripheral Ports and Accessories

■ Portable Medical Equipment

■ Hot Sw ap Supplies