LTC1154CN8#PBF

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Converter/Regulator
• Characteristics: Low Power, High Efficiency
• Package: 8-Pin Plastic DIP (Dual In-Line Package)
• Essence: Voltage Conversion and Regulation
• Packaging/Quantity: Tube/100 pieces per tube

Specifications

• Input Voltage Range: 1.5V to 15V
• Output Voltage Range: -1.22V to -14.5V
• Output Current: Up to 50mA
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 80µA (typical)

Pin Configuration

The LTC1154CN8#PBF 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) --| GND VFB |-- Pin 3: Ground (GND) / Feedback Voltage (VFB) --| SHDN FB |-- Pin 4: Shutdown Control (SHDN) / Feedback (FB) |___________| ```

Functional Features

• Voltage Conversion: The LTC1154CN8#PBF is designed to convert an input voltage (VIN) into a regulated negative output voltage (VOUT).
• Shutdown Control: The device includes a shutdown control pin (SHDN) that allows the user to disable the voltage conversion when not needed, reducing power consumption.
• Feedback Voltage: The feedback pin (VFB) provides a means for the user to adjust the output voltage level according to their specific requirements.

Advantages and Disadvantages

Advantages: - Low power consumption - High efficiency - Wide input voltage range - Shutdown control for power saving

Disadvantages: - Limited output current capacity (up to 50mA) - Requires external components for proper operation

Working Principles

The LTC1154CN8#PBF operates based on a switched-capacitor voltage converter topology. It utilizes an internal oscillator to generate a high-frequency square wave, which is then applied to a charge pump circuit. The charge pump transfers energy from the input voltage to an external capacitor, creating a negative output voltage. The feedback voltage pin allows the user to adjust the output voltage level by controlling the charge pump's operation.

Detailed Application Field Plans

The LTC1154CN8#PBF can be used in various applications that require a regulated negative voltage supply. Some potential application fields include:

1. Battery-Powered Devices: Portable electronic devices often require a negative voltage rail for specific components such as LCD displays or audio amplifiers.
2. Industrial Control Systems: Many industrial control systems utilize negative voltage supplies for analog signal conditioning, motor control, or sensor interfaces.
3. Telecommunications Equipment: Certain telecommunications equipment, like line cards or network switches, may require negative voltage rails for specific circuitry.
4. Automotive Electronics: Automotive applications may benefit from the LTC1154CN8#PBF for generating negative voltages needed for various subsystems, such as lighting controls or audio systems.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the LTC1154CN8#PBF are:

1. MAX660CPA: Voltage Converter/Regulator IC with similar specifications and package.
2. ICL7660CPA: Switched-Capacitor Voltage Converter IC with comparable characteristics and pin configuration.
3. LT1054CN8#PBF: Another voltage converter/regulator IC from Linear Technology with similar features and package.

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

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