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