MAX1044 Datasheet

• 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

• -5V Supply from +5V Logic Supply
• Data Acquisition
• EIA/TIA-232E and EIA/TIA-562 Power Supplies
• Handheld Instruments (PDAs, Palmtops)
• Op-Amp Power Supplies
• Panel Meters
• Personal Communications Equipment
• Portable Telephones

The MAX1044 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.

The MAX1044 combine low quiescent current and high efficiency. Oscillator control circuitry and four power MOSFET switches are included on-chip. Applications include generating a -5V supply from a +5V logic supply to power analog circuitry. For applications requiring more power, the MAX660 delivers up to 100mA with a voltage drop of less than 0.65V.