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MAX860 - Switched-Capacitor Voltage Converters

General Description

The MAX860/MAX861 charge-pump voltage converters invert input voltages ranging from +1.5V to +5.5V, or double input voltages ranging from +2.5V to +5.5V.

Because of their high switching frequencies, these devices use only two small, low-cost capacitors.

Key Features

  • o 8-Pin, 1.11mm High µMAX Package o Invert or Double the Input Supply Voltage o Three Selectable Switching Frequencies o High Frequency Reduces Capacitor Size o 87% Efficiency at 50mA o 200µA Quiescent Current (MAX860) o 1µA Shutdown Supply Current o 600mV Voltage Drop at 50mA Load o 12Ω Output Resistance MAX860/MAX861 ______________Ordering Information PART MAX860ISA MAX860IUA MAX860C/D MAX860ESA MAX860MJA MAX861ISA MAX861IUA MAX861C/D MAX861ESA MAX861MJA TEMP. RANGE -25°C to +85°C -25°C to +.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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19-0239; Rev 1; 11/96 50mA, Frequency-Selectable, Switched-Capacitor Voltage Converters _______________General Description The MAX860/MAX861 charge-pump voltage converters invert input voltages ranging from +1.5V to +5.5V, or double input voltages ranging from +2.5V to +5.5V. Because of their high switching frequencies, these devices use only two small, low-cost capacitors. Their 50mA output makes switching regulators unnecessary, eliminating inductors and their associated cost, size, and EMI. Greater than 90% efficiency over most of the load-current range, combined with a typical operating current of only 200µA (MAX860), provides ideal performance for both battery-powered and board-level voltage-conversion applications.