19-1240; Rev 0; 6/97
Switched-Capacitor
Voltage Inverters
_______________General Description
The ultra-small MAX870/MAX871 monolithic,
CMOS charge-pump inverters accept input
voltages ranging from +1.
4V to +5.
5V.
The MAX870 operates at 125kHz, and the MAX871 operates at 500kHz.
Their high efficiency (90%) and low operating current (0.
7mA for the MAX870) make these devices ideal for both battery-powered and board-level
voltage-conversion applications.
Oscillator control circuitry and four power
MOSFET switches are included on-chip.
A typical MAX870/ MAX871 application is generating a -5V supply from a +5V logic supply to power analog circuitry.
Both parts come in a 5-pin SOT23-5 package and ...