Analog Devices LT3470

Description

The LT®3470 is a micropower step-down DC/DC converter that integrates a 300mA power switch, catch diode and boost diode into low profile 3mm × 2mm DD and ThinSOT™ packages. The LT3470 combines 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 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-acidbatteries. 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.

Features

• Low Quiescent Current: 26µA at 12VIN to 3.3VOUT
• Integrated Boost and Catch Diodes
• Input Range: 4V to 40V
• Low Output Ripple: <10mV
• <1µA in Shutdown Mode
• Output Voltage: 1.25V to 16V
• 200mA 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 (0.75mm) 3mm × 2mm Thermally
• Enhanced 8-Lead DD and 1mm ThinSOT Packages

REMARKS:-REFERTable 2.Inductor Vendorspage no 10

Typical applications

• Automotive Battery Regulation
• Wall Transformer Regulation
• Distributed Supply Regulation
• Industrial Supplies
• Power for Portable Products

More information

• Datasheet
• IC product information