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LM3355MM-4.1 Folha de dados(PDF) 1 Page - National Semiconductor (TI) |
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LM3355MM-4.1 Folha de dados(HTML) 1 Page - National Semiconductor (TI) |
1 / 9 page LM3355 Regulated 50mA Buck-Boost Switched Capacitor DC/DC Converter General Description The LM3355 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 voltage. It accepts an input voltage between 2.5V and 5.5V. The LM3355 is available with a standard output voltage of 4.1V (ideal for white LED applications). If other output volt- age options between 1.8V and 4.1V are desired for other applications, please contact your National Semiconductor representative. The LM3355’s proprietary buck-boost architecture enables up to 50 mA of load current at an average efficiency greater than 75%. Typical operating current is only 375 µA and the typical shutdown current is only 2.3 µA. The LM3355 is available in a 10-pin MSOP package. This package has a maximum height of only 1.1 mm. The high efficiency of the LM3355, 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. See the LM3352 for up to 200mA of output current. Features n Regulated V OUT with ±3% accuracy n Standard output voltage of 4.1V n Custom output voltages available from 1.8V to 4.1V in 100 mV increments n 2.5V to 5.5V input voltage n Up to 50 mA output current n > 75% average efficiency n Uses few, low-cost external components n Very small solution size n 375 µA typical operating current n 2.3 µA typical shutdown current n 1 MHz switching frequency (typical) n Architecture and control methods provide high load current and good efficiency n MSOP-10 package n Over-temperature protection Applications n White LED display backlights 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 Typical Operating Circuit DS200219-1 December 2001 © 2001 National Semiconductor Corporation DS200219 www.national.com |
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Descrição semelhante - LM3355MM-4.1 |
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