Power Electronics

DC-DC Converter Supports Voltage Scaling

The AAT1142 from Advanced Analogic Technologies (AnalogicTech), a voltage-scaling step-down converter for portable applications, supplies up to 800 mA output current. The device offers Dynamic Voltage Management through both a two-wire I2C interface and AnalogicTech’s single-wire Simple Serial Control (S2Cwire) digital interface.

The AAT1142 provides Dynamic Voltage Management in programmable steps from as low as 0.6 V up to 2.0 V with 50 mV resolution. The converter delivers up to 800 mA output current over a wide 2.7 V to 5.5 V input range with up to 93%. Switching frequency is 2 MHz.

Designed to optimize power efficiency across the full load range, the AAT1142 features a multi-function MODE/SYNC pin that allows the user to maintain constant frequency and low noise across the operating range or synchronize the converter 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. Over-temperature and short-circuit protection circuits safeguard the AAT1142 and system components from potential damage. The converter also features internal soft start and 100% duty cycle low-dropout operation.

The AAT1142 is available now in a Pb-free, 3-mm x 3-mm, low-profile, 12-pin TDFN package or a Pb-free, 12-pin TSOPJW package. Pricing is $1.27 each in 1000-unit quantities.


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