MAX870

PRODUCTION

Switched-Capacitor Voltage Inverters

Compact, Inductorless, Low-Profile Inverter Fits 0.025 Sq. Inch , Biases GaAsFET PA

Data Sheet (Rev. 1) Product Selection Table
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Overview

  • 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.

Applications

  • Battery-Operated Equipment
  • Cell Phones
  • Handy-Terminals, PDAs
  • Local -5V Supply from 5V Logic Supply
  • Medical Instruments
  • Small LCD Panels
MAX870
Switched-Capacitor Voltage Inverters
MAX870, MAX871: Typical Operating Circuit
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Documentation

Data Sheet 1

Reliability Data 1

Technical Articles 1

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Charge Pumps 1
MAX860
PRODUCTION 50mA, Frequency-Selectable, Switched-Capacitor Voltage Converters
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