Product category:
Power Supply ICs and Controllers
News Release from: Advanced Analogic Technologies | Subject: AAT3258
Edited by the Electronicstalk Editorial
Team on 06 September 2004
LDO and microprocessor reset come
together
A novel high-performance LDO linear regulator is combined with a low-current microprocessor reset in half the space of two discrete devices.
A novel high-performance LDO linear regulator is combined with a low-current microprocessor reset in half the space of two discrete devices, thus minimising board size for portable products such as cellular phones, PDAs, digital cameras, and notebook computers Today's high performance portable products often employ multiple processors, controllers, or DSPs to deliver the demanding feature sets that customers require
This article was originally published on Electronicstalk on 16 Jun 2004 at 8.00am (UK)
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LDO handles big loads in portable kit
The AAT3239 is a new 500mA low-dropout (LDO) linear regulator for battery-operated portable applications.
By combining a microprocessor reset monitor and a 300mA LDO regulator in a single 3.0 x 2.85mm package, AnalogicTech's AAT3258 significantly minimises design footprint.
With separate input pins, the regulator also maximises design flexibility by allowing designers to operate each function from independent sources, and more easily and efficiently configure their design.
The AAT3258 has been optimised for very fast startup and shutdown timing, which is ideal for regulating power for microprocessor blocks that quickly turn to full power from sleep mode.
The device also delivers very fast transient response time to react quickly to load current changes - an important attribute for applications such as GSM phones, which turn on and off quickly to transmit and receive data.
Offering a number of power-saving features, the AAT3258 includes a shutdown mode to extend battery life, and the device's dropout voltage is only 400mV at full 300mA output.
Moreover, the microprocessor reset section typically consumes just 1uA of quiescent current and has an active low reset output.
The AAT3258 also features complete overcurrent/short-circuit protection and overtemperature protection circuits for reliable operation in extreme operating conditions.
The LDO regulator output on the AAT3258 is optimised to function with low-cost, low ESR ceramic capacitors, and supports operation over a wide range of capacitor types.
The device is qualified across the standard -40 to +85C industrial temperature range and is available now in an 8-pin TSOPJW package.
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