AAT4290/91
I/O Expander Load Switches with Serial Control General Description
The AAT4290 and AAT4291 SmartSwitch produc...
AAT4290/91
I/O Expander Load Switches with Serial Control 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. Each switch features a 500ns turn-on time. The switch states are controlled by AnalogicTech’s Simple Serial Control™ (S2Cwire™) interface which permits ease of control and efficiency of size. The quiescent supply current is very low, typically 5µA. In shutdown mode, the supply current is reduced to less than 1µA. The AAT4290 and AAT4291 are offered in a Pbfree, 8-pin SC70JW package specified over the -40°C to +85°C temperature range.
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Features
SmartSwitch™
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
Typical Application
INPUT
IN
OUT1 OUT2
OUT1 OUT2 OUT3 OUT4 OUT5
AAT4290
EN/...