MAX860
50mA, Frequency-Selectable, Switched-Capacitor Voltage Converters
Inductorless Inverter/Positive Doubler Switches Up to 250kHz
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Overview
Features and Benefits
- 8-Pin, 1.11mm High µMAX Package
- Invert or Double the Input Supply Voltage
- Three Selectable Switching Frequencies
- High Frequency Reduces Capacitor Size
- 87% Efficiency at 50mA
- 200µA Quiescent Current (MAX860)
- 1µA Shutdown Supply Current
- 600mV Voltage Drop at 50mA Load
- 12Ω Output Resistance
Product Details
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.
A frequency-control (FC) pin provides three switching-frequencies to optimize capacitor size and quiescent current and to prevent interference with sensitive circuitry. Each device has a unique set of three available frequencies. A shutdown (active-low SHDN) pin reduces current consumption to less than 1µA. The MAX860/MAX861 are suitable for use in applications where the ICL7660 and MAX660's switching frequencies are too low. The MAX860/MAX861 are available in 8-pin µMAX® and SO packages.
Applications
- Handheld Instruments (PDAs, Palmtops)
- Interface Power Supplies
- Medical Instruments
- Operational Amplifier Power Supplies
- Portable Computing
Product Categories
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
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MAX860 Reliability Data1/12/2023PDF25K
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Two AA Cells Power Dual-Supply µP11/11/2002
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
PCN-PDN Information
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