ADM660AR

CMOS开关电容电压转换器 CMOS Switched-Capacitor Voltage Converters

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 μF or 10 μF 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