MAX1745AUB+ - English Editing Encyclopedia Entry

Product Overview

Category

The MAX1745AUB+ belongs to the category of integrated circuits (ICs) and specifically falls under the voltage regulators category.

Use

This product is primarily used for voltage regulation in various electronic devices and systems.

Characteristics

• The MAX1745AUB+ is a low-dropout linear regulator.
• It operates with an input voltage range of 2.5V to 16V.
• The output voltage can be adjusted from 1.25V to 15V.
• It offers a high output current capability of up to 500mA.
• This regulator provides excellent line and load regulation, ensuring stable voltage output.
• It features low dropout voltage, minimizing power dissipation.
• The device incorporates thermal shutdown and current limit protection mechanisms.

Package and Essence

The MAX1745AUB+ is available in a small SOT23-5 package. Its compact size makes it suitable for space-constrained applications. The essence of this product lies in its ability to regulate voltage efficiently and reliably.

Packaging/Quantity

The MAX1745AUB+ is typically sold in reels or tubes, containing a specific quantity of units per package. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Input Voltage Range: 2.5V to 16V
• Output Voltage Range: 1.25V to 15V
• Output Current: Up to 500mA
• Dropout Voltage: Low
• Line Regulation: Excellent
• Load Regulation: Excellent
• Package Type: SOT23-5

Detailed Pin Configuration

The MAX1745AUB+ has five pins arranged as follows:

```

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| | --| VOUT | --| GND | --| FB | --| VIN | --| SHDN | |___________| ```

1. VOUT: Output Voltage Pin
2. GND: Ground Pin
3. FB: Feedback Pin
4. VIN: Input Voltage Pin
5. SHDN: Shutdown Pin

Functional Features

• Low Dropout Voltage: The MAX1745AUB+ exhibits a low dropout voltage, ensuring efficient power conversion and minimizing energy loss.
• High Output Current Capability: With a maximum output current of 500mA, this regulator can handle demanding loads in various applications.
• Excellent Line and Load Regulation: The device maintains stable output voltage even with variations in input voltage and load conditions.
• Thermal Shutdown and Current Limit Protection: The MAX1745AUB+ incorporates built-in protection mechanisms to prevent damage due to excessive temperature or current.

Advantages and Disadvantages

Advantages

• Compact size and easy integration due to the SOT23-5 package.
• Wide input voltage range allows for versatile application scenarios.
• High output current capability enables usage in power-hungry devices.
• Excellent line and load regulation ensure stable voltage output.
• Built-in protection mechanisms enhance reliability.

Disadvantages

• Limited output voltage adjustment range (1.25V to 15V).
• May not be suitable for applications requiring higher output voltages.

Working Principles

The MAX1745AUB+ operates as a linear regulator, utilizing a pass transistor to regulate the output voltage. It compares the feedback voltage (FB) with a reference voltage to control the pass transistor's conduction. By adjusting the resistance between FB and GND, the desired output voltage can be set. The regulator continuously monitors the input voltage (VIN) and adjusts the pass transistor accordingly to maintain a stable output voltage.

Detailed Application Field Plans

The MAX1745AUB+ finds applications in various electronic devices and systems, including but not limited to: - Battery-powered devices - Portable consumer electronics - Industrial control systems - Automotive electronics - Communication equipment

Detailed and Complete Alternative Models

1. LM1117-3.3: A popular alternative with a fixed output voltage of 3.3V.
2. LT1763: Offers adjustable output voltage and higher output current capability.
3. TPS7A4700: Provides ultra-low dropout voltage and high PSRR (Power Supply Rejection Ratio).

These alternative models offer similar functionality and can be considered based on specific requirements.

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