120mA High Efficiency Step-Down Switched Capacitor Voltage Converter With Voltage Monitoring

The LM2797 LM2798 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 LM2798 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: 35?A operating unloaded and 0.1?A in shutdown.
Features of the LM2797 LM2798 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.) below the nominal output voltage of the part.
The optimal external component requirements of the LM2797 98 solution minimize size and cost, making the part ideal for Li-Ion and other battery powered designs. Two 1?F flying capacitors and two 10?F bypass capacitors are all that is required, and no inductors are needed.
The LM2797 LM2798 also features short-circuit protection over-temperature protection, and soft-start circuitry to prevent excessive inrush currents. The LM2798 has a 400?s turn-on time. The turn-on time of the LM2797 is 100?s.
By National Semiconductor Corporation
LM2798 's PackagesLM2798 's pdf datasheet
LM2798MM-1.5 SOIC
LM2798MM-1.8 SOIC
LM2798MM-2.0 SOIC
LM2798MMX-1.5 SOIC
LM2798MMX-1.8 SOIC
LM2798MMX-2.0 SOIC

LM2798 Pinout, Pinouts
LM2798 pinout,Pin out
This is one package pinout of LM2798,If you need more pinouts please download LM2798's pdf datasheet.

LM2798 Application circuits
LM2798 circuits
This is one application circuit of LM2798,If you need more circuits,please download LM2798's pdf datasheet.

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