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LM2798MM-1.8 データシート

LM2798MM-1.8 120mA High Efficiency Step-Down Switched Capacitor Voltage Converter with Voltage Monitoring National-Semiconductor
National ->Texas Instruments National-Semiconductor
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General Description
The LM2797/98 switched capacitor step-down DC/DC converters efficiently produce a 120mA regulated low-voltage rail from a 2.6V to 5.5V input. Fixed output voltage options of 1.5V, 1.8V, and 2.0V are available. The LM2797/98 uses multiple fractional gain configurations to maximize conversion efficiency over the entire input voltage and output current ranges. Also contributing to high overall efficiency is the extremely low supply current of the LM2797/98: 35µA operating unloaded and 0.1µA in shutdown.

■ Output voltage options: 2.0V ± 5%, 1.8V ± 5%, and 1.5V ± 6%
■ 120mA output current capability
■ Multi-Gain and Gain Hopping for Highest Possible Efficiency - up to 90% Efficient
■ 2.6V to 5.5V input range
■ Input and Output Voltage Monitoring (BATOK and POK)
■ Low operating supply current: 35µA
■ Shutdown supply current: 0.1µA
■ Thermal and short circuit protection
■ LM2798 turn-on time: 400µs LM2797 turn-on time: 100µs
■ Available in an 10-Pin MSOP Package

■ Cellular Phones
■ Pagers
■ H/PC and P/PC Devices
■ Portable Electronic Equipment
■ Handheld Instrumentation

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