FAN5660

www.fairchildsemi.com FAN5660 Monolithic Inductorless CMOS DC/DC Converter Features Inverts, Doubles or Splits Input Supply Voltage 90% Typ Conversion Efficiency at 100mA load current 0.5V Typ Loss at 100mA Load Low 160µA Operating Current 5.0Ω Typ Output Resistance for C1 = C2 = 100µF Selectable Oscillator Frequency: 5kHz/50kHz 8-pin SOIC package. General Description The FAN5660 is a monolithic charge-pump which can invert, double or split a +1.5V to +5.5V input voltage. Using only two identical low-cost capacitors, the charge pump replaces switching regulators, thus eliminating inductors and their associated cost, size, and EMI. The device has a greater than 90% efficiency over most of its load current range and a typical operating current of only 160µA. The FAN5660 is ideal for both battery-powered and boardlevel voltage conversion applications. In order to enable the user optimize capacitor size and quiescent current, the FAN5660 is offered with a frequency control (FC) pin which selects either 5kHz or 50kHz operation. The Oscillator frequency can also be driven with an external clock. The FAN5660 is available in 8-pin small-outline packages. Applications Laptop Computers Medical Instruments Interface Power Supplies Hand-Held Instruments Operational-Amplifier Power Supplies Simplified Block Diagram CAP+ CAP– VSS V+ VSH CONTROL LV SYNC OSCILLATOR FC REV. 1.0.2 3/28/02 FAN5660 Pin Configuration FC 1 CAP+ 2 FAN5660 VSS 3 CAP4 SOIC 6 5 LV ...