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Charge Pumps | CAT660

Charge Pump Voltage Converter

Obsolete

Datasheet

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Overview

The CAT660 is a charge-pump voltage converter. It will invert a 1.5V to 5.5V input to a -1.5V to -5.5V output. Only two external capacitors are needed. With a guaranteed 100mA output current capability, the CAT660 can replace a switching regulator and its inductor. Lower EMI is achieved due to the absence of an inductor.

In addition, the CAT660 can double a voltage supplied from a battery or power supply. Inputs from 2.5V to 5.5V will yield a doubled, 5V to 11V output voltage.

A Frequency Control pin (BOOST/FC) is provided to select either a high (80kHz) or low (10kHz) internal oscillator frequency, thus allowing quiescent current vs. capacitor size trade-offs to be made. The 80kHz frequency is selected when the FC pin is connected to V+. The operating frequency can also be adjusted with an external capacitor at the OSC pin or by driving OSC with an external clock.

8-pin SOIC package is available in the industrial temperature range.

The CAT660 replaces the MAX660 and the LTC®660. In addition, the CAT660 is pin compatible with the 7660/1044, offering an easy upgrade for applications with 100mA loads.

  • Negative voltage generator
  • Voltage doubler
  • Voltage splitter
  • Low EMI power source
  • GaAs FET biasing
  • Lithium battery power supply
  • Instrumentation
  • LCD contrast bias
  • Cellular phones, pagers

  • Replaces MAX660 and LTC®660
  • Converts V+ to V- or V+ to 2V+
  • Low output resistance, 4Ω typical
  • High power efficiency
  • Selectable charge pump frequency
    - 10kHz or 80kHz
    - Optimize capacitor size
  • Low quiescent current
  • Pin-compatible, high-current alternative to 7660/1044
  • Industrial temperature range
  • Available in 8-pin SOIC package
    - Lead-free, halogen-free package option

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CAT660EVA-GT3

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Obsolete

CAD Model

Pb

A

H

P

SOIC-8

751BD

1

260

REEL

3000

N

3.0 to 5.5

-Vin or 2Vin

100

3000

80

No

Price N/A

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