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PMIC - Voltage Regulators - DC DC Switching Regulators


The MAX1044 and ICL7660( ICL7660CSA ) 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. ICL7660CSA 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 ICL7660CSA 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

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