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LM3354MMX-3.7 Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LM3354MMX-3.7 Datasheet(HTML) 1 Page - National Semiconductor (TI) |
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1 / 11 page  LM3354-3.7 Regulated 90mA Buck-Boost Switched Capacitor DC/DC Converter General Description The LM3354 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 LM3354 is also available with standard output voltages of 1.8V, 3.3V, 3.7V, 4.1V (ideal for white LED applications), and 5.0V. If other output voltage options between 1.8V and 5.0V are desired, please contact your National Semiconduc- tor representative. The LM3354’s proprietary buck-boost architecture enables up to 90mA 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 LM3354 is available in a 10-pin MSOP package. This package has a maximum height of only 1.1 mm. The high efficiency of the LM3354, 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 or the LM3355 for up to 50mA of output current. Features n Regulated V OUT with ±3% accuracy n Standard output voltages of 1.8V, 3.3V, 4.1V, and 5.0V also available n Custom output voltages available from 1.8V to 5.0V in 100 mV increments with volume order n 2.5V to 5.5V input voltage range n Up to 90mA 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 typical switching frequency 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 Li-Ion, NiCd, NiMH, or alkaline battery powered systems Typical Operating Circuit 20057301 November 2002 © 2002 National Semiconductor Corporation DS200573 www.national.com |
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