REF2940AIDBZRG4

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

Characteristics: - Low Dropout Voltage - High Accuracy - Low Quiescent Current - Thermal Shutdown Protection

Package: SOT-23-6

Essence: The REF2940AIDBZRG4 is a voltage regulator IC that provides a stable output voltage for various electronic devices.

Packaging/Quantity: Available in tape and reel packaging with 3000 units per reel.

Specifications

• Input Voltage Range: 2.5V to 5.5V
• Output Voltage Range: 1.25V to 3.3V
• Dropout Voltage: 200mV at 100mA Load Current
• Quiescent Current: 75µA
• Line Regulation: 0.02%/V
• Load Regulation: 0.04%/mA
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The REF2940AIDBZRG4 has six pins arranged as follows:

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| | --| Vout | --|_______| --| GND | --|_______| --| Vin | --|_______| | | --| NC | --|_______| | | --| NC | --|_______| | | --| NC | --|_______| ```

Functional Features

• Low dropout voltage ensures efficient regulation even when the input voltage is close to the desired output voltage.
• High accuracy provides a stable output voltage, making it suitable for precision applications.
• Low quiescent current minimizes power consumption, extending battery life in portable devices.
• Thermal shutdown protection prevents the IC from overheating, ensuring reliable operation.

Advantages and Disadvantages

Advantages: - Wide input voltage range allows compatibility with various power sources. - Small package size (SOT-23-6) enables space-saving designs. - Excellent line and load regulation ensures stable output voltage under varying conditions.

Disadvantages: - Limited output voltage range may not be suitable for applications requiring higher voltages. - Sensitive to excessive heat, requiring proper thermal management in high-power applications.

Working Principles

The REF2940AIDBZRG4 is a linear voltage regulator that uses a reference voltage and feedback mechanism to maintain a constant output voltage. It operates by comparing the output voltage with an internal reference voltage and adjusting the pass transistor accordingly. This feedback loop ensures that the output voltage remains stable despite changes in input voltage or load conditions.

Detailed Application Field Plans

The REF2940AIDBZRG4 is commonly used in various electronic devices where a stable voltage supply is required. Some typical application fields include:

1. Battery-Powered Devices: Portable electronics such as smartphones, tablets, and wearable devices benefit from the low dropout voltage and low quiescent current of the REF2940AIDBZRG4, maximizing battery life.

2. Industrial Control Systems: The high accuracy and thermal shutdown protection make this voltage regulator suitable for industrial control systems, ensuring stable and reliable operation in harsh environments.

3. Automotive Electronics: With its wide input voltage range and thermal protection, the REF2940AIDBZRG4 can be used in automotive applications, including infotainment systems, lighting controls, and engine management systems.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the REF2940AIDBZRG4 are:

1. LM1117-3.3: A popular voltage regulator IC with a fixed 3.3V output voltage and similar characteristics.
2. LT1763: A low dropout voltage regulator with adjustable output voltage and excellent line/load regulation.
3. TPS7A4700: An ultra-low quiescent current voltage regulator suitable for battery-powered applications.

These alternative models can be considered based on specific requirements and design constraints.

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