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. The MAX1044/ICL7660 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.
The MAX1044 and ICL7660 are monolithic, CMOS switched-capacitor voltage converters designed to invert, double, divide, or multiply a positive input voltage. These devices are pin compatible with the industry-standard ICL7660 and LTC1044. They operate with a supply voltage range of 1.5V to 10V and deliver 10mA with a 0.5V output drop without requiring an external diode.
| Supply Voltage Range | 1.5V to 10V |
|---|---|
| Output Current | 10mA |
| Output Drop | 0.5V |
| No-Load Supply Current | 200µA Max at 5V |
| Power-Conversion Efficiency | 98% Typical |
| Operating Temperature Range | 0°C to +70°C |
No, they operate without an external diode over the full temperature range.
Yes, they are pin compatible with the industry-standard ICL7660 and LTC1044.
The BOOST pin raises the oscillator frequency above the audio band and reduces external capacitor size requirements.