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LT3470IDDB#TRPBF

更新时间： 2024-11-30 13:09:39
品牌 Logo 应用领域
凌特 - Linear 调节器二极管
页数 文件大小 规格书
20页 240K
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LT3470IDDB#TRPBF 数据手册

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LT3470  
Micropower Buck Regulator  
with Integrated Boost and  
Catch Diodes  
FeaTures  
DescripTion  
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  
ThinSOT™ 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.  
n
Low Quiescent Current: 26µA at 12V to 3.3V  
IN  
OUT  
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  
With its wide input range of 4V to 40V, the LT3470 can  
regulateawidevarietyofpowersources,from2-cellLi-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  
currentlimitingandhystereticcontrolprotectstheLT3470  
and external components against shorted outputs, even  
at 40V input.  
– Low Ripple Burst Mode® Operation at Light Loads  
– Continuous Operation at Higher Loads  
2
n
n
Solution Size as Small as 50mm  
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  
L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks  
and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the  
property of their respective owners.  
n
Distributed Supply Regulation  
n
Industrial Supplies  
n
Wall Transformer Regulation  
Typical applicaTion  
Efficiency and Power Loss vs Load Current  
90  
80  
70  
60  
50  
40  
30  
20  
10  
1000  
100  
10  
V
IN  
V
= 12V  
IN  
7V TO 40V  
0.22µF  
33µH  
V
BOOST  
IN  
LT3470  
SHDN  
V
OUT  
5V  
OFF ON  
2.2µF  
SW  
200mA  
BIAS  
604k  
1%  
22pF  
FB  
22µF  
GND  
200k  
1%  
1
3470 TA01a  
0.1  
0.1  
1
10  
100  
LOAD CURRENT (mA)  
3470 TA02  
3470fd  
1
1234567...20

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LT3470IDDB#TRPBF 替代型号

型号 品牌 替代类型 描述 数据表
LT3470IDDB#TRMPBF Linear

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