A Frequency Control (FC) input pin is used to select either 25 kHz or 120 kHz charge-pump operation. This is used to optimize capacitor size and quiescent current. With 25 kHz selected, a 10 µF external capacitor is suitable, while with 120 kHz the capacitor may be reduced to 2.2 µF. The oscillator frequency on the ADM660AN can also be controlled with an external capacitor connected to the OSC input or by driving this input with an external clock. In applications where a higher supply voltage is desired it is possible to use the ADM660AN to double the input voltage. With input voltages from 2.5 V to 7 V, output voltages from 5 V to 14 V are achievable with up to 100 mA output current.
The ADM8660 features a low power shutdown (SD) pin instead of the external oscillator (OSC) pin. This can be used to disable the device and reduce the quiescent current to 300 nA.
Feature
- 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
