MAX8878EUK28+ - English Editing Encyclopedia Entry

Product Overview

Category

The MAX8878EUK28+ belongs to the category of voltage regulators.

Use

It is primarily used for regulating voltage in electronic circuits.

Characteristics

• Input Voltage Range: 2.5V to 6.5V
• Output Voltage: 2.8V
• Maximum Output Current: 150mA
• Low Dropout Voltage: 120mV at 100mA
• Low Quiescent Current: 40µA (typical)
• Package Type: SOT23-5
• Operating Temperature Range: -40°C to +85°C

Packaging/Quantity

The MAX8878EUK28+ is available in a SOT23-5 package. It is typically sold in reels containing a quantity of 3000 units.

Specifications

The specifications of the MAX8878EUK28+ are as follows:

• Input Voltage Range: 2.5V to 6.5V
• Output Voltage: 2.8V
• Output Current: 150mA (maximum)
• Dropout Voltage: 120mV at 100mA
• Quiescent Current: 40µA (typical)
• Line Regulation: ±0.05% (typical)
• Load Regulation: ±0.1% (typical)
• Ripple Rejection: 70dB (typical)
• Shutdown Current: 0.1µA (typical)
• Thermal Shutdown Protection: Yes

Pin Configuration

The MAX8878EUK28+ has the following pin configuration:

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Pin Description: 1. VIN: Input Voltage 2. GND: Ground 3. EN: Enable Pin 4. BYP: Bypass Capacitor 5. VOUT: Output Voltage

Functional Features

The MAX8878EUK28+ offers the following functional features:

1. Low Dropout Voltage: The regulator maintains a low dropout voltage of 120mV at 100mA, ensuring efficient power conversion.
2. Low Quiescent Current: With a typical quiescent current of 40µA, the device minimizes power consumption in standby or idle modes.
3. Thermal Shutdown Protection: The regulator includes thermal shutdown protection to prevent damage due to excessive temperature.
4. Wide Input Voltage Range: It can accept input voltages ranging from 2.5V to 6.5V, making it suitable for various applications.
5. Excellent Line and Load Regulation: The MAX8878EUK28+ exhibits excellent line and load regulation, ensuring stable output voltage under varying conditions.

Advantages and Disadvantages

Advantages

• Low dropout voltage ensures efficient power conversion.
• Low quiescent current minimizes power consumption.
• Thermal shutdown protection prevents damage from overheating.
• Wide input voltage range allows for versatile application.

Disadvantages

• Maximum output current limited to 150mA, which may not be sufficient for high-power applications.
• Limited output voltage options, with only 2.8V available.

Working Principles

The MAX8878EUK28+ is a linear voltage regulator that operates by maintaining a constant output voltage despite variations in the input voltage and load conditions. It achieves this through a combination of feedback control and internal circuitry.

When the input voltage is applied, the regulator compares it to a reference voltage and adjusts the output voltage accordingly. The feedback loop continuously monitors the output voltage and adjusts the internal circuitry to maintain the desired output voltage level.

The regulator also includes protection features such as thermal shutdown, which activates when the temperature exceeds a certain threshold, preventing damage to the device.

Detailed Application Field Plans

The MAX8878EUK28+ finds applications in various fields, including:

1. Portable Electronics: It can be used in battery-powered devices such as smartphones, tablets, and portable media players to regulate voltage for different components.
2. IoT Devices: The regulator is suitable for low-power IoT devices that require stable voltage supply.
3. Wearable Technology: It can be utilized in wearable devices like smartwatches and fitness trackers to ensure consistent power delivery.
4. Industrial Control Systems: The regulator can be employed in industrial control systems where precise voltage regulation is crucial.

Detailed and Complete Alternative Models

Some alternative models to the MAX8878EUK28+ include:

1. LM1117-2.8: A popular linear voltage regulator with an output voltage of 2.8V and similar specifications.
2. MCP1700-2802E/TO: Another option with a 2.8V output voltage and comparable features.
3. LP2985-28DBVR: This regulator offers a 2.8V output voltage and low dropout characteristics