LT3572 Datasheet | Linear Technology

LT3572 Dual Full-Bridge Piezo Driver with 900m A Boost Converter .. Features - - - - DESCRIPTION The LT®3572 is a highly integrated dual Piezo motor driver capable of driving two Piezo motors at up to 40V from a 5V supply. Each Piezo driver can be independently turned on or off along with the boost converter. The boost regulator has a soft-start capability that limits the inrush current at start-up. The boost regulator switching frequency is set by an external resistor or the frequency can be synchronized by an external clock. A PGOOD pin indicates when the output of the boost converter is in regulation and the Piezo drivers are allowed to start switching. The LT3572 is available in a (4mm × 4mm) 20-pin QFN package. , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. - - - - 2.7V to 10V Input Voltage Range 900m A Boost Converter Dual Full-Bridge Piezo Drivers Programmable Switching Frequency from 500k Hz to 2.25MHz Synchronizable Up to 2.5MHz Soft-Start Separate Enable for Each Piezo Driver and Boost Converter Available in a 4mm × 4mm 20-Pin QFN Package APPLICATIONS - Piezo Motor Drive TYPICAL APPLICATION Dual Piezo Driver VIN 3V TO 5V 10μH VOUT 30V 50m A SW VOUT FB OUTA LT3572 OUTA 3572 TA01a Response Driving Piezo Motor at 70k Hz 100k 4.7μF VIN SHDN SHDNA SHDNB PWMA PWMB SYNC PGOOD RT 15p F 576k 10μF 24.3k VOUTA 20V/DIV VOUTA 20V/DIV OUTB GND OUTB 42.2k SS 10n F PWMA 2V/DIV 2μs/DIV 3572...