Hot-selling and scarce ADM660AR CMOS Switched-Capacitor Voltage Converters SOP8 spot stock

Product Descriptions

The ADM660/ADM8660 is a charge-pump voltage converterthat can be used to either invert the input supply voltage givingV_OUT = –V_IN or double it (ADM660 only) giving V_OUT = 2 × V_IN .

Input voltages ranging from +1.5 V to +7 V can be inverted intoa negative –1.5 V to –7 V output supply. This inverting schemeis ideal for generating a negative rail in single power supplysystems. Only two small external capacitors are needed for thecharge pump. Output currents up to 50 mA  with greater than90% efficiency are achievable, while 100 mA achieves greaterthan 80% efficiency.

A Frequency Control (FC) input pin is used to select either25 kHz or 120 kHz charge-pump operation. This is used tooptimize capacitor size and quiescent current. With 25 kHzselected, a 10 µF external capacitor is suitable, while with 120 kHz the capacitor may be reduced to 2.2 µF .  The oscillatorfrequency on the ADM660 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 supplyvoltage is desired it is  possible to use the ADM660 to doublethe input voltage. With input voltages from 2.5 V to 7 V, outputvoltages from 5 V to 14 V are achievable with up to 100 mAoutput current.

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The ADM8660 features a low power shutdown (SD) pin instead of the external oscillator (OSC) pin. This can be used todisable the device and reduce the quiescent current to 300 nA .

Product 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 A Quiescent Current

Selectable Charge Pump Frequency (25 kHz/120 kHz)

Pin Compatible Upgrade for MAX660, MAX665, ICL7660

Available in 16-Lead TSSOP Package

Product Applications

Handheld Instruments

Portable Computers

Remote Data Acquisition

Op Amp Power Supplies

Product Photos

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