Maxim Integrated MAX680ESA

Description
The MAX680/MAX681 are monolithic, CMOS, dual charge-pump voltage converters that provide ±10V outputs from a 5V input voltage. They feature both a positive step-up charge pump to develop 10V from 5V input and an inverting charge pump to generate the -10V output. Both parts have an on-chip 0.8kHz oscillator. The MAX681 has the capacitors internal to the package, while the MAX680 requires four external capacitors to produce both positive and negative voltages from a single supply. The output source impedances are typically 1500Ω, providing useful output currents up to 10mA. The low quiescent current and high efficiency make this device suitable for a variety of applications that need both positive and negative voltages generated from a single supply.

Features
Only four external capacitors required (MAX680)
No capacitors required (MAX681)
500µA supply current
Monolithic CMOS design
95% voltage-conversion efficiency
85% power-conversion efficiency
2V to 6V voltage range

Applications
±6V from 3V Lithium Cell
Hand-Held Instruments
Data-Acquisition Systems
Panel Meters
±10V from 5V Logic Supply
Battery-Operated Equipment
Operational Amplifier Power Supplies