19-0478; Rev 0; 3/96
Dual-Output Charge Pump with Shutdown
_______________General Description
The MAX864
CMOS, charge-pump, DC-DC
voltage converter produces a positive and a negative output 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.
75V to +6.
0V.
The internal oscillator can be pin-programmed from 7kHz to 185kHz, allowing the quiescent current, capacitor size, and switching frequency to be optimized.
The 55Ω output impedance permits useful output currents up to 20mA.
The MAX864 also has a 1µA logic-controlled shutdown.
The MAX864 comes in a 16-pin QSOP pac...