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LM3352MTC-2.5

更新时间： 2024-11-08 22:51:55
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Regulated 200 mA Buck-Boost Switched Capacitor DC/DC Converter

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LM3352MTC-2.5 数据手册

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September 1999  
LM3352  
Regulated 200 mA Buck-Boost Switched Capacitor  
DC/DC Converter  
n Custom output voltages available from 1.8V to 4.0V in  
100 mV increments  
n 2.5V to 5.5V input voltage  
n Up to 200 mA output current  
General Description  
The LM3352 is a CMOS switched capacitor DC/DC con-  
verter that produces a regulated output voltage by automati-  
cally stepping up (boost) or stepping down (buck) the input  
>
n
80% average efficiency  
voltage. It accepts an input voltage between 2.5V and 5.5V.  
The LM3352 is available in three standard output voltage  
versions: 2.5V, 3.0V and 3.3V. If other output voltage options  
between 1.8V and 4.0V are desired, please contact your Na-  
tional Semiconductor representative.  
n Uses few, low-cost external components  
n Very small solution size  
n 400 µA typical operating current  
n 2.5 µA typical shutdown current  
n 1 MHz switching frequency (typical)  
n Architecture and control methods provide high load  
current and good efficiency  
The LM3352’s proprietary buck-boost architecture enables  
up to 200 mA of load current at an average efficiency greater  
than 80%. Typical operating current is only 400 µA and the  
typical shutdown current is only 2.5 µA.  
n TSSOP-16 package  
The LM3352 is available in a 16-pin TSSOP package. This  
package has a maximum height of only 1.1 mm.  
n Over-temperature protection  
The high efficiency of the LM3352, low operating and shut-  
down currents, small package size, and the small size of the  
overall solution make this device ideal for battery powered,  
portable, and hand-held applications.  
Applications  
n 1-cell Lilon battery-operated equipment including PDAs,  
hand-held PCs, cellular phones  
n Flat panel displays  
n Hand-held instruments  
n NiCd, NiMH, or alkaline battery powered systems  
n 3.3V to 2.5V and 5.0V to 3.3V conversion  
Features  
±
n Regulated VOUT with 3% accuracy  
n Standard output voltage options: 2.5V, 3.0V and 3.3V  
Typical Operating Circuit  
DS101037-1  
© 1999 National Semiconductor Corporation  
DS101037  
www.national.com  
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