LT3470 Datasheet | Linear Technology

.. Micropower Buck Regulator with Integrated Boost and Catch Diodes Features - - - - - - - - DESCRIPTIO - - U APPLICATIO S - - - - - Low Quiescent Current: 26µA at 12VIN to 3.3VOUT Integrated Boost and Catch Diodes Input Range: 4V to 40V Low Output Ripple: <10m V < 1µA in Shutdown Mode Output Voltage: 1.25V to 16V 200m A Output Current Hysteretic Mode Control - Low Ripple Burst Mode® Operation at Light Loads - Continuous Operation at Higher Loads Solution Size as Small as 50mm2 Low Profile (1mm) Thin SOT Package The LT®3470 is a micropower step-down DC/DC converter that integrates a 300m A power switch, catch diode and boost diode into a low profile (1mm) Thin SOTTM package. The LT3470 bines Burst Mode and continuous operation to allow the use of tiny inductor and capacitors while providing a low ripple output to loads of up to 200m A. With its wide input range of 4V to 40V, the LT3470 can regulate a wide variety of power sources, from 2-cell Li-Ion batteries to unregulated wall transformers and leadacid batteries. Quiescent current in regulation is just 26µA in a typical application while a zero current shutdown mode disconnects the load from the input source, simplifying power management in battery-powered systems. Fast current limiting and hysteretic control protects the LT3470 and external ponents against shorted outputs, even at 40V input. , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Burst Mode is a registered trademark of Linear Technology Corporation. Thin SOT is a trademark of Linear Technology Corporation. Automotive Battery Regulation Power for Portable Products Distributed Supply Regulation Industrial Supplies Wall Transformer Regulation TYPICAL APPLICATIO VIN 7V TO 40V VIN OFF ON SHDN BOOST SW BIAS Efficiency and Power Loss vs Load Current 90 VIN = 12V 1000 0.22µF LT3470 33µH VOUT 5V 200m A 604k 1% 22µF 200k 1% 80 70...