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LM2665

SNVS009H – NOVEMBER 1999 – REVISED MARCH 2016

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Figure 14. Generate a Regulated 5-V from 3-V Input Voltage

9.2.1.3 Application Curve

Figure 15. Efficiency vs Load Current

9.2.2 Splitting V+ In Half

Another interesting application shown in Splitting Vin in Half is using the LM2665 as a precision voltage divider.

This circuit can be derived from the voltage doubler by switching the input and output connections. In the voltage

divider, the input voltage applies across the OUT pin and the GND pin (which are the power rails for the internal

oscillator), therefore no start-up diode is needed. Also, since the off-voltage across each switch equals VIN/2, the

input voltage can be raised to 11 V.

Figure 16. Application Circuit for Splitting Voltage

10 Power Supply Recommendations

The LM2665 is designed to operate from as an inverter over an input voltage supply range between 2.5 V and

5.5 V when the LV pin is grounded. This input supply must be well regulated and capable to supply the required

input current. If the input supply is located far from the device, additional bulk capacitance may be required in

addition to the ceramic bypass capacitors.