MAX771ESA+ - English Editing Encyclopedia Entry

Product Overview

Category: Integrated Circuits (ICs)

Use: The MAX771ESA+ is a voltage regulator IC that provides a regulated output voltage for various electronic devices. It is commonly used in power management applications.

Characteristics: - Input Voltage Range: 2.7V to 11V - Output Voltage Range: 1.25V to 10V - Maximum Output Current: 500mA - Low Dropout Voltage: 120mV at 100mA - Low Quiescent Current: 40µA - Adjustable Output Voltage - Thermal Shutdown Protection

Package: The MAX771ESA+ is available in an 8-pin small outline integrated circuit (SOIC) package.

Essence: This voltage regulator IC ensures a stable and reliable power supply for electronic devices by regulating the input voltage to a desired output voltage level.

Packaging/Quantity: The MAX771ESA+ is typically sold in reels or tubes, with a quantity of 250 units per reel/tube.

Specifications

• Input Voltage Range: 2.7V to 11V
• Output Voltage Range: 1.25V to 10V
• Maximum Output Current: 500mA
• Dropout Voltage: 120mV at 100mA
• Quiescent Current: 40µA
• Operating Temperature Range: -40°C to +85°C
• Package Type: 8-pin SOIC

Pin Configuration

The MAX771ESA+ has the following pin configuration:

```

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| | --| Vout Vin|-- --| GND EN |-- --| FB NC |-- |___________| ```

Pin Description: - Vout: Output Voltage - Vin: Input Voltage - GND: Ground - EN: Enable Pin (Active High) - FB: Feedback Pin - NC: No Connection

Functional Features

1. Voltage Regulation: The MAX771ESA+ regulates the input voltage to provide a stable output voltage, ensuring proper operation of connected electronic devices.
2. Adjustable Output Voltage: The output voltage can be adjusted within the specified range using external resistors connected to the feedback pin (FB).
3. Low Dropout Voltage: The IC exhibits a low dropout voltage, minimizing power dissipation and maximizing efficiency.
4. Thermal Shutdown Protection: The MAX771ESA+ incorporates thermal shutdown protection, preventing damage due to excessive temperature.

Advantages and Disadvantages

Advantages: - Wide input voltage range allows compatibility with various power sources. - Adjustable output voltage provides flexibility for different applications. - Low dropout voltage minimizes power loss and improves efficiency. - Thermal shutdown protection ensures device safety.

Disadvantages: - Maximum output current limited to 500mA, which may not be sufficient for high-power applications. - Limited number of pins restricts additional functionalities without external circuitry.

Working Principles

The MAX771ESA+ operates as a linear voltage regulator. It compares the output voltage with a reference voltage and adjusts the pass transistor to maintain a constant output voltage. The feedback pin (FB) is used to set the desired output voltage by connecting external resistors in a voltage divider configuration.

When the enable pin (EN) is high, the regulator is active, and it regulates the input voltage to provide a stable output voltage. If the temperature exceeds the specified limit, the thermal shutdown protection feature disables the regulator to prevent overheating.

Detailed Application Field Plans

The MAX771ESA+ finds applications in various electronic devices that require a regulated power supply. Some common application fields include: 1. Battery-powered devices: Portable electronics, such as smartphones, tablets, and portable media players. 2. Automotive electronics: Power management for automotive infotainment systems, lighting modules, and sensors. 3. Industrial equipment: Control systems, motor drives, and instrumentation devices. 4. Consumer electronics: Audio/video equipment, gaming consoles, and home appliances.

Detailed and Complete Alternative Models

1. LM317: A popular adjustable linear voltage regulator with a wide input voltage range and adjustable output voltage.
2. LT1084: High-current linear voltage regulator with low dropout voltage and adjustable output voltage.
3. LM1117: Low dropout voltage regulator with fixed output voltage options and thermal shutdown protection.

These alternative models offer similar functionality to the MAX771ESA+ and can be considered based on specific application requirements.

In conclusion, the MAX771ESA+ is an integrated circuit voltage regulator that provides stable power supply for electronic devices. With its adjustable output voltage, low dropout voltage, and thermal shutdown protection, it offers advantages in various application fields. However, its limited maximum output current and pin count should be considered when selecting the appropriate voltage regulator for a specific application.