General Description
The MAX1044 and ICL7660 are monolithic, CMOS switched-capacitor voltage converters that invert, double, divide, or multiply a positive input voltage. They are pin compatible with the industry-standard ICL7660 and LTC1044. Operation is guaranteed from 1.5V to 10V with no external diode over the full temperature range. They deliver 10mA with a 0.5V output drop. The MAX1044 has a BOOST pin that raises the oscillator frequency above the audio band and reduces external capacitor size requirements.

Features
● Miniature μMAX Package
● 1.5V to 10.0V Operating Supply Voltage Range
● 98% Typical Power-Conversion Efficiency
● Invert, Double, Divide, or Multiply Input Voltages
● BOOST Pin Increases Switching Frequencies
   (MAX1044)
● No-Load Supply Current: 200μA Max at 5V
● No External Diode Required for Higher-Voltage
   Operation

Applications
● -5V Supply from +5V Logic Supply
● Personal Communications Equipment
● Portable Telephones
● Op-Amp Power Supplies
● EIA/TIA-232E and EIA/TIA-562 Power Supplies
● Data-Acquisition Systems
● Hand-Held Instruments
● Panel Meters