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LT3470A

更新时间： 2023-12-20 18:46:07
品牌 Logo 应用领域
亚德诺 - ADI 二极管稳压器
页数 文件大小 规格书
20页 729K
描述
具集成升压和箝位二极管的微功率降压型稳压器

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LT3470A 数据手册

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LT3470A  
Micropower Buck Regulator  
with Integrated Boost and Catch Diodes  
FEATURES  
DESCRIPTION  
The LT®3470A is a micropower step-down DC/DC con-  
verter that integrates a 440mA power switch, catch diode  
and boost diode into low profile 2mm × 3mm DFN  
package. The LT3470A 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 250mA.  
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Low Quiescent Current: 35µA at 12V to 3.3V  
Integrated Boost and Catch Diodes  
Input Range: 4V to 40V  
IN  
OUT  
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3.3V at 250mA from 4V to 40V Input  
5V at 250mA from 5.7V to 40V Input  
Low Output Ripple: <10mV  
<1µA in Shutdown Mode  
Output Voltage: 1.25V to 16V  
With its wide input range of 4V to 40V, the LT3470A 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 35µA 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 cur-  
rent limiting and hysteretic control protects the LT3470A  
and external components against shorted outputs, even  
at 40V input. The LT3470A has higher output current and  
improved start-up and dropout performance compared  
to the LT3470.  
Hysteretic Mode Control  
Low Ripple Burst Mode® Operation at Light Loads  
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Continuous Operation at Higher Loads  
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Solution Size as Small as 50mm  
Low Profile (0.75mm) 2mm × 3mm Thermally  
Enhanced 8-Lead DFN Package  
AEC-Q100 Qualified for Automotive Applications  
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APPLICATIONS  
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Automotive Battery Regulation  
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Power for Portable Products  
All registered trademarks and trademarks are the property of their respective owners  
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Distributed Supply Regulation  
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Industrial Supplies  
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Wall Transformer Regulation  
TYPICAL APPLICATION  
Efficiency and Power Loss vs Load Current  
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Document Feedback  
For more information www.analog.com  
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