New Industry Products

Linear Tech Adds 4 x 4mm Dual Full-Bridge Piezo Driver

February 19, 2008 by Jeff Shepard

Linear Technology Corp. announced the LT3572, a highly integrated dual full-bridge Piezo driver, capable of driving two Piezo motors at up to 40V. Each Piezo driver and the boost converter can be independently turned on or off.

This design topology makes the LT3572 suitable for dual axis image stabilization as well as auto focus and zoom motor control for digital still and video cameras. Its 2.7 to 10V input voltage accommodates both single-cell and dual-cell Li-Ion powered digital cameras.

The LT3572’s integrated 900mA boost converter can deliver up to 50mA of output current at 30V from a Li-Ion input. Its switching frequency can be programmed between 500kHz and 2.25MHz, keeping externals very small. Offered in a 4 x 4mm QFN package, it is said to provide a very compact solution footprint. A PGOOD pin indicates when the output of the boost converter is in regulation, allowing the Piezo drivers to start switching. Other features include soft-start and external synchronization.

The LT3572EUF is available from stock in a 20-lead QFN package. 1,000-piece pricing starts at $2.75 each.