The LT3470IDDB is a micropower step-down DC/DC converter that integrates a 300mA power switch, catch diode and boost diode into low profile 3mm x 2mm DD and ThinSOT™ packages. The LT3470IDDB 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 LT3470IDDB 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 LT3470IDDB and external components against shorted outputs, even at 40V input.
Vin Min StartupSwitch CurrentLT34705.5V300mALT3470A4V400mAFeature
- 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 x 2mm Thermally Enhanced 8-Lead DD and 1mm ThinSOT Packages
Applications
- Automotive Battery Regulation
- Power for Portable Products
- Distributed Supply Regulation
- Industrial Supplies
- Wall Transformer Regulation
(Picture: Pinout)
