General Description

The AAT4290 and AAT4291 SmartSwitch products are members of AnalogicTech’s Application Specific Power MOSFET™ (ASPM™) product family. The AAT4290 and AAT4291 are five and three P-channel MOSFETs, respectively, configured for use as a microprocessor I/O expander. Having independent drain outputs and a common source input, they operate with an input voltage ranging from 1.8V to 5.5V, making them ideal for 2.5V, 3.3V, or 5V systems, as well as systems powered by lithium-ion/polymer batteries.

Features

• 1.8V to 5.5V Input Voltage Range

• 5 or 3 Independent Load Switches

• S2Cwire Interface

• 1.1Ω RDS(ON) Per Switch

• Low Quiescent Current

— 5µA

— 0.1µA in Shutdown

• -40°C to +85°C Temperature Range

• 8-Pin SC70JW Package

Applications

• Cell Phones

• I/O Expansion

• Multiple Low Power Switching

• Personal Communication Devices

• Portable Electronic Devices