GENERAL DESCRIPTION

The ADM660/ADM8660 is a charge-pump voltage converter that can be used to either invert the input supply voltage giving VOUT = –VIN or double it (ADM660 only) giving VOUT = 2 x VIN.

Input voltages ranging from +1.5 V to +7 V can be inverted into a negative –1.5 V to –7 V output supply. This inverting scheme is ideal for generating a negative rail in single power supply systems. Only two small external capacitors are needed for the charge pump. Output currents up to 50 mA with greater than 90% efficiency are achievable, while 100 mA achieves greater than 80% efficiency.

FEATURES
   ADM660: Inverts or Doubles Input Supply Voltage
   ADM8660: Inverts Input Supply Voltage
   100 mA Output Current
   Shutdown Function (ADM8660)
   2.2
F or 10
F Capacitors
   0.3 V Drop at 30 mA Load
   +1.5 V to +7 V Supply
   Low Power CMOS: 600 μA Quiescent Current
   Selectable Charge Pump Frequency (25 kHz/120 kHz)
   Pin Compatible Upgrade for MAX660, MAX665, ICL7660
   Available in 16-Lead TSSOP Package

APPLICATIONS
   Handheld Instruments
   Portable Computers
   Remote Data Acquisition
   Op Amp Power Supplies