MAX1680 - Maxim

MAX1680 Switched-Capacitor Voltage Converters

The MAX1680/MAX1681 inductorless switched-capacitor voltage converters either invert an input voltage of +2.0V to +5.5V or double it while supplying up to 125mA output current. They have a selectable-frequency option that allows the use of small capacitors: 4.7µF (MAX1680), 1µF (MAX1681). With their high output current capability, these charge-pump devices a.

Features

o Selectable Switching Frequencies: 125kHz/250kHz (MAX1680) 500kHz/1MHz (MAX1681) o Allow Use of Small Capacitors (1µF for the MAX1681) o 125mA Output Current o 3.5Ω Output Impedance o 1µA Logic-Controlled Shutdown o Configurable as Voltage Inverters or Doublers o +2.0V to +5.5V Input Voltage Range o Available in 8-Pin SO Packages o 90% Efficiency MAX1680/MAX1681 ________________________Applications Local Negative Supplies Interface Power Supplies Op-Amp Power Supplies MOSFET Bias ______________Ordering Information PART MAX1680C/D MAX1680ESA MAX1681C/D MAX1681ESA TEMP. RANGE 0°C to +70°C -4.