Product category:
Power Supply ICs and Controllers
News Release from: Advanced Analogic Technologies | Subject: AAT1142
Edited by the Electronicstalk Editorial
Team on 16 August 2006
Power convertor enables economies of
scale
Step-down convertor gives designers the ability to bring power savings of voltage scaling to virtually any portable system.
Leading developer of power management semiconductors for mobile consumer electronic devices AnalogicTech has introduced the AAT1142, a voltage-scaling step-down convertor for portable applications Supplying up to 800mA output current, the device is the first voltage-scaling step-down convertor to offer dynamic voltage management through both a two-wire I2C interface and AnalogicTech's patented single-wire Simple Serial Control (S2Cwire) digital interface
This article was originally published on Electronicstalk on 16 Jun 2004 at 8.00am (UK)
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Most mid- to high-end handsets available today incorporate I2C, so they can easily take advantage of the power efficiencies of voltage scaling.
More cost-sensitive handsets, however, simply cannot afford the hardware and firmware overhead associated with implementing I2C.
Through its S2Cwire interface, the AAT1142 gives designers the ability to bring the power savings of voltage scaling to virtually any portable system.
The AAT1142 provides dynamic voltage management in programmable steps from 0.6 to 2.0V with 50mV resolution.
The convertor delivers up to 800mA output current over a wide 2.7 to 5.5V input range with up to 93% efficiency.
Designed to optimise power efficiency across the full load range, the AAT1142 features a multifunction mode/sync pin that allows the user to maintain constant frequency and low noise across the operating range or synchronise the convertor to an external clock.
Dynamic voltage management allows a host system to quickly adjust the AAT1142 output voltage on-the-fly to track microprocessor idle-active states, thereby providing high power to the processor only when needed, and saving precious battery life.
Operating at a 2MHz switching frequency, the AAT1142 reduces system footprint by supporting the use of a very small, space-saving external inductor and capacitors.
Overtemperature and short-circuit protection circuits safeguard both the device and system components from potential damage.
The convertor also features internal soft start and 100% duty cycle low-dropout operation.
The AAT1142 is available now in a Pb-free 3 x 3mm low-profile 12-pin TDFN package or a Pb-free 12-pin TSOPJW package.
The device is specified over the -40 to +85C operating temperature range.
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