CAT661
High Frequency 100 mA CMOS Charge Pump, Inverter/Doubler
Description The CAT661 is a charge−pump voltage converter.
It can invert a
positive input voltage to a negative output.
Only two external capacitors are needed.
With a guaranteed 100 mA output current capability, the CAT661 can replace a switching
regulator and its inductor.
Lower EMI is achieved due to the absence of an inductor.
In addition, the CAT661 can double a voltage supplied from a battery or power supply.
Inputs from 2.
5 V to 5.
5 V will yield a doubled, 5 V to 11 V output.
A Frequency Control pin (BOOST/FC) is provided to select either a high (typically 135 kHz) or low (25 kHz) internal oscillator frequency, thus allo...