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Slew-rate controlled load switches support 12V operation

Posted: 01 May 2007 ?? ?Print Version ?Bookmark and Share

Keywords:AAT4285? slew rate controlled load switch? P-channel MOSFET?

AnalogicTech's slew rate controlled load switches

AnalogicTech has announced the AAT4285, said to be the industry's first integrated slew-rate controlled load switch capable of supporting 12V operation. By integrating level shift and slew rate control functionality into a single device, the AAT4285 allows designers to reduce power consumption and minimize parts count in various new 12V applications.

The AAT4285 is a p-channel MOSFET switch designed for high-side load switching applications. The device operates across a 3-13.2V input range. Functionally compatible with the company's AAT4250 and AAT4280 products, the AAT4285 offers a fast load switch turn-on time of 100?s. A fast shutdown load discharge capability allows the device to quickly turn off a load circuit when the switch is disabled.

The device also offers a very low Rds(on) of 240 milliohms typical at 12V to maximize load switch power handling capability. At 5V, Rds(on) is 320m typical. Quiescent current is 25?A typical.

The AAT4285 is the first 12V device manufactured in AnalogicTech's ModularBCD process technology. Unlike aging linear-IC legacy fabs or generic digital CMOS foundries, the ModularBCD process represents the first of a new generation of analog, power and mixed-signal IC technologies especially created for high-tech wafer fabrication and optimized for manufacture in ex-DRAM fabs.

The new process makes single-chip, mixed-signal and system ICs both more technically and economically feasible by monolithically integrating fully-isolated CMOS at 3-, 5- and 12V with high-speed complementary bipolar transistors and robust 30V DMOS power devices without resorting to highly complex and expensive techniques such as epitaxy or high-temperature diffusion.

As a result, devices manufactured in ModularBCD offer higher efficiency, smaller size and higher levels of integration than devices fabricated in traditional processes. The devices can also better manage power and extend battery life in different mobile consumer electronics products such as cellphones, PMPs, tablet and laptop computers and digital cameras.

Specified across the -40C to 85C temperature range, the AAT4285 is available in a Pb-free, 8-pin SC70JW package.

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