19-0472; Rev 1; 7/97
Compact, Dual-Output Charge Pump
_______________General Description
The MAX865 is a
CMOS charge-pump DC-DC converter in an ultra-small µMAX package.
It produces positive and negative outputs from a single positive input, and requires only four
capacitors.
The charge pump first doubles the input
voltage, then inverts the doubled
voltage.
The input
voltage ranges from +1.
5V to +6.
0V.
The internal oscillator is guaranteed to be between 20kHz and 38kHz, keeping noise above the audio range while consuming minimal supply current.
A 75Ω output impedance permits useful output currents up to 20mA.
The MAX865 comes in a 1.
11mm-high, 8-pin µMAX package that occupies half the board...