LT3470ETS8#TRPBF Power Path Management IC Switching Voltage Regulators 300mA, 40V Micropower Step-Down Reg in ThinSOT

FeaTures

n Low Quiescent Current: 26μA at 12VIN to 3.3VOUT n Integrated Boost and Catch Diodes
n Input Range: 4V to 40V
n Low Output Ripple: <10mV

n <1μA in Shutdown Mode
n Output Voltage: 1.25V to 16V n 200mA Output Current
n Hysteretic Mode Control

– Low Ripple Burst Mode® Operation at Light Loads

– Continuous Operation at Higher Loads
n Solution Size as Small as 50mm2
n Low Profile (0.75mm) 3mm × 2mm Thermally

Enhanced 8-Lead DD and 1mm ThinSOT Packages

ApplicaTions

n Automotive Battery Regulation n Power for Portable Products n Distributed Supply Regulation n Industrial Supplies

n Wall Transformer Regulation

Describe

The LT®3470 is a micropower step-down DC/DC con- verter that integrates a 300mA power switch, catch diode and boost diode into low profile 3mm × 2mm DD and ThinSOTTM packages. The LT3470 combines Burst Mode and continuous operation to allow the use of tiny induc- tor and capacitors while providing a low ripple output to loads of up to 200mA.

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 lead-acid 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 components against shorted outputs, even at 40V input.