Step-up convertor saves space

Boost convertor provides high voltage power bus in systems powered by a single-cell Lithium-ion battery without violating extremely tight space constraints.

Many portable system designers face the daunting task of creating a high voltage (5V or higher) power bus in systems powered by a single-cell Lithium-ion battery without violating extremely tight space constraints.

AnalogicTech's AAT1210 is the industry's first boost convertor to supply this high voltage/high current source and still allow designers to use extremely small external components including inductors under 1mm in height, thus achieving a total solution less than or equal to 1mm tall.

The AAT1210 is a high power, high current step-up convertor for thin, small-footprint portable applications.

Supplying up to 4.5W of power, the convertor is the first to take a single-cell Lithium-ion battery voltage and boost it to a 5V/900mA output in a total solution less than 1mm in height.

Operating from an input range of 2.7 to 5.5V, this DC/DC boost convertor features an output voltage which can be set from the input level +0.5V up to 18V.

A hysteretic current mode control circuit simplifies system design by eliminating the need for external compensation.

A high 2MHz switching frequency enables the use of extremely small and low-profile external components and allows designers to build total solutions that consume less PCB area.

To help minimise leakage current common on boost convertors, the AAT1210 features an innovative true load disconnect function that isolates the load from the power source when the device is turned off.

This feature helps the AAT1210 achieve ultra-low sleep mode current consumption without the use of an external MOSFET.

In general, the AAT1210 achieves power efficiency levels up to 90% over a wide load range.

The AAT1210 supplies a fixed output voltage that is set using an external resistor divider.

As an option, it also offers dynamic voltage scaling in which the output may be adjusted dynamically across a 2.0x range using AnalogicTech's patented single-wire S2Cwire (Simple Serial Control) interface.

To ensure reliability, the AAT1210 adds a number of safety features including cycle-by-cycle current limit, integrated soft start, short-circuit and over-temperature protection.

The AAT1210 is specified over the -40 to +85C temperature range.

It is available in a Pb-free, thermally-enhanced, 16-pin TDFN34 package.

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