Date: 18/12/2008

Half-bridge MOSFET driver with very low impedance for DC-DC converters

Advanced Analogic has announced a new high-voltage addition to the company's MOSFET driver product family. Supporting voltages up to 28V, the AAT4910, half-bridge, dual MOSFET driver offers very low impedance in its class for multiphase DC-DC converters.

The AAT4910 dual MOSFET driver takes a logic input and drives both high and low-side N-channel MOSFETs. The high side external MOSFET is turned on when the logic input is driven high and the low-side MOSFET is turned on when the logic input is driven low. Powered from a 5V rail, the device features circuitry capable of driving the high-side N-channel MOSFET with up to 28V power input. When driven low, the enable input turns off the driver and reduces operating current to < 1 µA. A fast switching frequency helps minimize the cost and size of external components.

Break-before-make shoot-through protection prohibits high-side and low-side MOSFETs on the AAT4910 from conducting current at the same time. To protect the device from a short circuit or defective MOSFET, the AAT4910 also features over-temperature protection, which turns off the device when die temperature exceeds 140º C.

Packaging: 8-lead SC70JW package
Size: 2mm x 2.1mm
Prizing: It sells for $0.48 in 1K quantities.

For more information, please visit the website: www.analogictech.com