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 are suitable replacements for inductor-based regulators, which require more expensive external components and additional board space. The devices' equivalent output resistance (typically 3.5Ω) allows them to deliver as much as 125mA with only a 440mV drop. A shutdown feature reduces quiescent current to less than 1µA. The MAX1680/MAX1681 are available in 8-pin SO packages. For devices that deliver up to 50mA in smaller µMAX® packages, refer to the MAX860/MAX861 data sheet. Applications * Interface Power Supplies * Local Negative Supplies * MOSFET Bias * Op-Amp Power Supplies * Selectable Switching Frequencies: * 125kHz/250kHz (MAX1680) * 500kHz/1MHz (MAX1681) * Allow Use of Small Capacitors (1µF for the MAX1681) * 125mA Output Current * 3.5Ω Output Impedance * 1µA Logic-Controlled Shutdown * Configurable as Voltage Inverters or Doublers * +2.0V to +5.5V Input Voltage Range * Available in 8-Pin SO Packages * 90% Efficiency https://elecena.pl/product/22317498/125ma-frequency-selectable-switched-capacitor-voltage-converters 2022-12-27 https://elecena.pl/product/22317498/125ma-frequency-selectable-switched-capacitor-voltage-converters 2025-01-22