| Specifications | LT3470 - Micropower Buck Regulator with Integrated Boost and Catch Diodes Data Sheet Linear Technology Corporation |
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| Specifications | LT3470 - Micropower Buck Regulator with Integrated Boost and Catch Diodes Data Sheet Linear Technology Corporation |
| Business section |
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| Specifications | LT3470 - Micropower Buck Regulator with Integrated Boost and Catch Diodes Data Sheet Linear Technology Corporation |
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| Content | 1 LT3470 3470fc ■Automotive Battery Regulation ■Power for Portable Products ■Distributed Supply Regulation ■Industrial Supplies ■Wall Transformer Regulation Micropower Buck Regulator with Integrated Boost and Catch Diodes ■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 Efficiency and Power Loss vs Load Current FEATURESDESCRIPTIOU APPLICATIO SU TYPICAL APPLICATIOU 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 x 2mm DD and ThinSOTTM 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- 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, simpli- fying power management in battery-powered systems. Fast current limiting and hysteretic control protects the LT3470 and external components against shorted out- puts, even at 40V input. LOAD CURRENT (mA) 30 EFFICIENCY (%) POWER LOSS (mW) 40 60 80 90 0.110100 3470 TA02 20 1 70 50 10 1 1000 100 10 0.1 VIN = 12V VINBOOST LT3470 SWSHDN 0.22µF 22pF 22µF2.2µF VIN7V TO 40V VOUT5V 200mA 604k 1% 200k 1% 33µH BIAS FB GND OFF ON , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Burst Mode is a registered trademark of Linear Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. |
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| Following Datasheets | 3476fa-1 (12 pages) 3477fb (20 pages) 3494fb_1 (12 pages) 35-1_2 (2 pages) 35_2 (1 pages) 3500fb (28 pages) 3508fb (24 pages) 350_appnote (1 pages) 350_appnote2 (1 pages) 352001 (1 pages) |
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