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LM3352MTC-3.3 Datenblatt(PDF) 1 Page - National Semiconductor (TI) |
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LM3352MTC-3.3 Datenblatt(HTML) 1 Page - National Semiconductor (TI) |
1 / 11 page LM3352 Regulated 200 mA Buck-Boost Switched Capacitor DC/DC Converter 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 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. 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. The LM3352 is available in a 16-pin TSSOP package. This package has a maximum height of only 1.1 mm. 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. Features n Regulated VOUT with ±3% accuracy n Standard output voltage options: 2.5V, 3.0V and 3.3V 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 n >80% average efficiency 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 n TSSOP-16 package n Over-temperature protection 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 Typical Operating Circuit DS101037-1 September 1999 © 1999 National Semiconductor Corporation DS101037 www.national.com |
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