MAX1679EUA+ - English Editing Encyclopedia Entry

Product Overview

Category: Integrated Circuits (ICs)

Use: The MAX1679EUA+ is a voltage regulator IC that provides a regulated output voltage for various electronic devices. It is commonly used in portable electronic devices, such as smartphones, tablets, and digital cameras.

Characteristics: - Input Voltage Range: 2.5V to 5.5V - Output Voltage Range: 1.8V to 3.3V - Maximum Output Current: 100mA - Low Dropout Voltage: 120mV at 100mA - Low Quiescent Current: 40µA - Thermal Shutdown Protection

Package: The MAX1679EUA+ is available in a small SOT23-8 package, which is compact and suitable for space-constrained applications.

Essence: This voltage regulator IC ensures a stable and reliable power supply to the connected electronic devices, preventing damage due to voltage fluctuations or drops.

Packaging/Quantity: The MAX1679EUA+ is typically sold in reels of 3000 units per reel.

Specifications

• Input Voltage Range: 2.5V to 5.5V
• Output Voltage Range: 1.8V to 3.3V
• Output Current: Up to 100mA
• Dropout Voltage: 120mV at 100mA
• Quiescent Current: 40µA
• Operating Temperature Range: -40°C to +85°C
• Package Type: SOT23-8

Pin Configuration

The MAX1679EUA+ has the following pin configuration:

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| | --| VIN GND |-- Pin 1 --| EN FB |-- Pin 2 --| VOUT NC |-- Pin 3 --| PG NC |-- Pin 4 --| NC NC |-- Pin 5 --| NC NC |-- Pin 6 --| NC NC |-- Pin 7 --| NC NC |-- Pin 8 |___________| ```

Functional Features

1. Input Voltage Regulation: The MAX1679EUA+ regulates the input voltage to provide a stable output voltage, even when the input voltage varies.

2. Output Voltage Selection: It allows for adjustable output voltages within the specified range (1.8V to 3.3V) to meet the requirements of different electronic devices.

3. Low Dropout Voltage: The IC maintains a low dropout voltage of 120mV at 100mA, ensuring efficient power conversion and minimizing power loss.

4. Thermal Shutdown Protection: In case of excessive temperature rise, the IC automatically shuts down to prevent damage to the device and connected electronics.

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 ensures efficient power conversion. - Compact package size enables usage in space-constrained designs. - Thermal shutdown protection enhances reliability and safety.

Disadvantages: - Limited maximum output current (100mA) may not be suitable for high-power applications. - SOT23-8 package may require specialized soldering techniques.

Working Principles

The MAX1679EUA+ operates as a linear voltage regulator. It uses a feedback mechanism to compare the output voltage with a reference voltage and adjusts the internal circuitry to maintain a constant output voltage. The input voltage is regulated by controlling the pass transistor, which drops the excess voltage to maintain the desired output voltage level.

Detailed Application Field Plans

The MAX1679EUA+ finds applications in various portable electronic devices, including: 1. Smartphones 2. Tablets 3. Digital cameras 4. Portable media players 5. Handheld gaming consoles

These devices require a stable and regulated power supply to ensure proper functionality and prevent damage due to voltage fluctuations.

Detailed and Complete Alternative Models

1. MAX1678EUA+: Similar to the MAX1679EUA+, but with a fixed output voltage of 3.3V.
2. MAX1677EUA+: Similar to the MAX1679EUA+, but with a fixed output voltage of 2.5V.
3. MAX1676EUA+: Similar to the MAX1679EUA+, but with a fixed output voltage of 1.8V.
4. LM1117-3.3: A popular alternative from Texas Instruments with a fixed output voltage of 3.3V.
5. LT1763CS8-3.3: Another alternative from Linear Technology with a fixed output voltage of 3.3V.