MAX660CPA

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Converter
• Characteristics: Low-power, Monolithic CMOS Voltage Converter
• Package: 8-pin PDIP (Plastic Dual In-Line Package)
• Essence: MAX660CPA is a voltage converter IC designed to generate a negative voltage from a positive input voltage.
• Packaging/Quantity: Available in tubes or tape and reel packaging, with a quantity of 25 units per tube/reel.

Specifications

• Input Voltage Range: +1.5V to +10V
• Output Voltage Range: -1.5V to -10V
• Operating Temperature Range: -40°C to +85°C
• Supply Current: 120µA (typical)
• Output Current: Up to 20mA
• Switching Frequency: 10kHz (typical)

Pin Configuration

The MAX660CPA has the following pin configuration:

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| | --| V+ GND |-- Pin 1: Positive Supply Voltage (V+) --| VIN VOUT |-- Pin 2: Input Voltage (VIN) / Output Voltage (VOUT) --| OSC N.C. |-- Pin 3: Oscillator Input (OSC) / No Connection (N.C.) --| C1 C2 |-- Pins 4 and 5: External Capacitor Connections (C1, C2) --| V- N.C. |-- Pin 6: Negative Output Voltage (V-) / No Connection (N.C.) --| N.C. SHDN|-- Pin 7: No Connection (N.C.) / Shutdown Control (SHDN) --| N.C. N.C. |-- Pins 8: No Connection (N.C.) |___________| ```

Functional Features

• Converts a positive input voltage into a negative output voltage.
• Low-power consumption, making it suitable for battery-powered applications.
• Monolithic CMOS design ensures high reliability and stability.
• Integrated oscillator eliminates the need for external components.
• Shutdown control feature allows for power-saving operation.

Advantages and Disadvantages

Advantages: - Efficient voltage conversion from positive to negative. - Compact and easy-to-use package. - Low power consumption extends battery life. - Integrated oscillator simplifies circuit design.

Disadvantages: - Limited output current capacity. - Restricted input and output voltage ranges. - Requires external capacitors for proper operation.

Working Principles

The MAX660CPA operates by utilizing an internal oscillator to generate a square wave signal. This signal is then fed into a charge pump circuit, which converts the positive input voltage into a negative output voltage. The magnitude of the output voltage is determined by the external capacitors connected to pins 4 and 5 (C1 and C2). The integrated shutdown control allows the device to be turned off when not in use, reducing power consumption.

Application Field Plans

The MAX660CPA finds applications in various fields, including:

1. Portable Electronics: Used to generate a negative voltage supply for LCD displays, backlighting, and other components.
2. Industrial Control Systems: Provides a negative voltage source for analog signal conditioning circuits.
3. Automotive Electronics: Enables the generation of negative voltages required for certain sensors and actuators.
4. Medical Devices: Utilized in medical equipment that requires a negative voltage supply.

Alternative Models

Other alternative models that offer similar functionality to the MAX660CPA include:

1. ICL7660CPA: A pin-compatible alternative with slightly different specifications.
2. MAX1044CPA: Offers improved output current capability compared to the MAX660CPA.
3. ICL7660SIPA: Surface-mount alternative with similar characteristics.

These alternative models can be considered based on specific application requirements and availability.

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