MAX870-MAX871: Switched-Capacitor Voltage Inverters Data Sheet (Rev. 1)5/31/2004406K
Features and Benefits
- 5-Pin SOT23-5 Package
- 99% Voltage Conversion Efficiency
- Invert Input Supply Voltage
- 0.7mA Quiescent Current (MAX870)
- +1.4V to +5.5V Input Voltage
- Require Only Two Capacitors
- 25mA Output Current
- Shutdown Control
The ultra-small MAX870/MAX871 monolithic, CMOS charge-pump inverters accept input voltages ranging from +1.4V to +5.5V. The MAX870 operates at 125kHz, and the MAX871 operates at 500kHz. Their high efficiency (90%) and low operating current (0.7mA for the MAX870) make these devices ideal for both battery-powered and board-level voltage-conversion applications.
Oscillator control circuitry and four power MOSFET switches are included on-chip. A typical MAX870/ MAX871 application is generating a -5V supply from a +5V logic supply to power analog circuitry. Both parts come in a 5-pin SOT23-5 package and can deliver 25mA with a voltage drop of 500mV.
For a similar device with logic-controlled shutdown, refer to the MAX1720/MAX1721. For applications requiring more power, the MAX860 delivers up to 50mA with a voltage drop of 600mV, in a space-saving µMAX package.
- Battery-Operated Equipment
- Cell Phones
- Handy-Terminals, PDAs
- Local -5V Supply from 5V Logic Supply
- Medical Instruments
- Small LCD Panels
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
MAX871 Reliability Data1/12/2023116K
Guide to Integrated Charge Pump DC-DC Conversion11/29/2001
Managing Noise in Cell-Phone Handsets1/24/2001
MAX871 Companion Parts
Recommended Related Parts
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.
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