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LM2798

National Semiconductor
Part Number LM2798
Manufacturer National Semiconductor
Description 120mA High Efficiency Step-Down Switched Capacitor Voltage Converter
Published Mar 22, 2005
Detailed Description LM2797/LM2798 120mA High Efficiency Step-Down Switched Capacitor Voltage Converter with Voltage Monitoring April 2003 ...
Datasheet PDF File LM2798 PDF File

LM2798
LM2798

Overview
LM2797/LM2798 120mA High Efficiency Step-Down Switched Capacitor Voltage Converter with Voltage Monitoring April 2003 LM2797/LM2798 120mA High Efficiency Step-Down Switched Capacitor Voltage Converter with Voltage Monitoring 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.
Features of the LM2797/98 include input voltage and output voltage monitoring.
Pin BATOK provides battery monitoring by indicating when the input voltage is above 2.
85V (typ.
).
Pin POK verifies that the output voltage is not more than 5% (typ.
) be...


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