Charge pump in an 8-DIP — field-swappable and socket-friendly
The MAX660CPA+ is a charge pump voltage converter from Analog Devices that generates either a negative output equal to the input voltage or a doubled positive output, using just two external capacitors. It accepts an input from 1.5V to 5.5V and delivers up to 100 mA. Switching frequency is selectable between 10 kHz and 80 kHz, letting you trade capacitor size against ripple.
1.5V to 5.5V input — runs from a single lithium cell or 3.3V rail
The input range covers a single Li-ion cell (3.0V–4.2V), two alkaline cells, or a regulated 3.3V or 5V rail. Minimum input is 1.5V, so it can operate from a nearly depleted battery. Maximum input is 5.5V — stay under that; 5V is fine, but a 6V supply exceeds the rating.
100 mA output — enough for op-amp rails, small displays, or level shifters
The single output delivers up to 100 mA. That is enough to power a dual-supply op-amp circuit from a single battery, bias an LCD contrast adjust, or generate a negative rail for an RS-232 transceiver. If your load needs more than 100 mA, this is not the part — look at a switching regulator instead.
