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MAX680

Part Number	MAX680
Manufacturer	Maxim
Description	+5V to 10V Voltage Converters
Published	May 2, 2005
Detailed Description	Click here for production status of specific part numbers. MAX680/MAX681 +5V to ±10V Voltage Converters General Descri...
Datasheet	MAX680 PDF File

Overview

Click here for production status of specific part numbers.
MAX680/MAX681 +5V to ±10V Voltage Converters General Description The MAX680/MAX681 are monolithic, CMOS, dual chargepump 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 The MAX680/MAX681 can be used wherever a single positive supply is available and where positive and negative voltages are required.
Common applications include generating ±6V from a 3V battery and generating ±10V from the standard +5V logic supply (for use with analog circuitry).
Typical applications include: ●● ±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 Pin Configurations TOP VIEW C1- 1 C2+ 2 C2- 3 V- 4 MAX680 DIP/SO 8 V+ 7 C1+ 6 VCC 5 GND V+ 1 C1- 2 C1- 3 C2+ 4 C2- 5 C2- 6 V- 7 MAX681 14 VCC 13 VCC 12 VCC 11 VCC 10 V+ 9 GND 8 GND DIP Features ●● 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 Curr...

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