MAX680

PRODUCTION

+5V to ±10V Voltage Converters

Generates Positive and Negative Doubled Outputs Simultaneously

Data Sheet (Rev. 2) Product Selection Table
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Overview

  • 95% Voltage-Conversion Efficiency
  • 85% Power-Conversion Efficiency
  • +2V to +6V Voltage Range
  • Only Four External Capacitors Required (MAX680)
  • No Capacitors Required (MAX681)
  • 500µA Supply Current
  • Monolithic CMOS Design

The MAX680/MAX681 are monolithic, CMOS, dual charge-pump voltage converters that provide ±10V outputs from a +5V input voltage. The MAX680/MAX681 provide 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, 8kHz oscillator. The MAX681 has the capacitors internal to the package, and the MAX680 requires four external capacitors to produce both positive and negative voltages from a single supply.

The output source impedances are typically 150Ω, 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.

The MAX864/MAX865 are also recommended for new designs. The MAX864 operates at up to 200kHz and uses smaller capacitors. The MAX865 comes in the smaller µMAX® package.

Applications

  • ±10V from +5V Logic Supply
  • ±6V from 3V Lithium Cell
  • Battery-Powered Applications
  • Data Acquisition
  • Handheld Instruments (PDAs, Palmtops)
  • Operational Amplifier Power Supplies
  • Panel Meters
MAX680
+5V to ±10V Voltage Converters
MAX680, MAX681: Typical Operating Circuits
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Documentation

Data Sheet 2

Reliability Data 1

Design Note 1

Technical Articles 2

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Charge Pumps 1
MAX864
PRODUCTION Dual-Output Charge Pump with Shutdown
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