CAT660: Charge Pump Voltage Converter
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.
Features- 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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Applications- 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
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Package Drawings (1)
Data Sheets (1)
Order Information
| Product | Status | Compliance | Package | MSL* | Container | Budgetary Price/Unit |
|---|
| CAT660EVA-GT3 | Active | Pb-free
Halide free | SOIC-8 | 751BD | 1 | Tape and Reel | 3000 | $0.8 |
Specifications
| Product | Vin Typ (V) | Vout Typ (V) | Iout Typ (mA) | ICC Max (µA) | fOSC Typ (kHz) | Shutdown Pin |
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| CAT660EVA-GT3 | 3.0 to 5.5 | -Vin or 2Vin | 100 | 3000 | 80 | No |
