Product description
Switched-Capacitor Voltage Converter
The MAX1044 is a monolithic, CMOS switched-capacitor voltage converter that inverts, doubles, divides, or multiplies a positive input voltage. It is pin compatible with the industry-standard LTC1044. Operation is guaranteed from 1.5V to 10V with no external diode over the full temperature range. It delivers 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 combines 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.
Features
* 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
* No-Load Supply Current: 200uA 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
The MAX1044 is a monolithic, CMOS switched-capacitor voltage converter that inverts, doubles, divides, or multiplies a positive input voltage. It is pin compatible with the industry-standard LTC1044. Operation is guaranteed from 1.5V to 10V with no external diode over the full temperature range. It delivers 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 combines 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.
Features
* 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
* No-Load Supply Current: 200uA 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
