MPQ2918GL-Z

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management

Characteristics: - Low dropout voltage regulator - High output current capability - Adjustable output voltage - Thermal shutdown protection - Overcurrent and short circuit protection

Package: TO-252-5L (DPAK)

Essence: The MPQ2918GL-Z is a low dropout voltage regulator designed for power management applications. It provides a stable output voltage with high output current capability, making it suitable for various electronic devices.

Packaging/Quantity: The MPQ2918GL-Z is available in a TO-252-5L package, commonly known as DPAK. It is supplied in reels or tubes, with a quantity of 2500 units per reel or 50 units per tube.

Specifications

• Input Voltage Range: 2.5V to 6V
• Output Voltage Range: 1.2V to 5.5V
• Dropout Voltage: 300mV at 500mA
• Output Current: Up to 1A
• Quiescent Current: 75µA
• Line Regulation: ±0.2%
• Load Regulation: ±0.4%
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The MPQ2918GL-Z has five pins arranged as follows:

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| | --| VOUT |-- --| GND |-- --| ADJ |-- --| VIN |-- |_______| ```

Pin Descriptions: - VOUT: Output Voltage - GND: Ground - ADJ: Adjustable Pin (Connects to external resistors for setting the output voltage) - VIN: Input Voltage

Functional Features

1. Low Dropout Voltage: The MPQ2918GL-Z has a low dropout voltage of 300mV at 500mA, ensuring efficient power conversion even with small input-output differentials.

2. High Output Current Capability: With an output current capability of up to 1A, the regulator can handle high-power applications without compromising performance.

3. Adjustable Output Voltage: The ADJ pin allows for easy adjustment of the output voltage within the specified range, providing flexibility in various system requirements.

4. Thermal Shutdown Protection: The IC incorporates thermal shutdown protection, which prevents damage due to excessive temperature by shutting down the regulator when it reaches a critical threshold.

5. Overcurrent and Short Circuit Protection: The MPQ2918GL-Z includes built-in overcurrent and short circuit protection, safeguarding the device and connected components from potential damage.

Advantages and Disadvantages

Advantages: - Low dropout voltage ensures efficient power conversion. - High output current capability enables use in demanding applications. - Adjustable output voltage provides flexibility. - Thermal shutdown and overcurrent/short circuit protection enhance reliability.

Disadvantages: - Limited input voltage range (2.5V to 6V). - Relatively higher quiescent current compared to some other regulators.

Working Principles

The MPQ2918GL-Z operates as a linear voltage regulator. It regulates the output voltage by maintaining a constant voltage drop across its internal pass transistor. The adjustable output voltage is achieved by connecting external resistors to the ADJ pin, forming a voltage divider network.

When the input voltage exceeds the desired output voltage plus the dropout voltage, the regulator enters the regulation mode. It adjusts the pass transistor's resistance to maintain a stable output voltage despite variations in load current and input voltage.

In case of excessive temperature or overcurrent/short circuit conditions, the thermal shutdown and protection features activate, temporarily disabling the regulator to prevent damage.

Detailed Application Field Plans

The MPQ2918GL-Z is widely used in various electronic devices and systems, including but not limited to:

1. Battery-Powered Devices: Portable electronics such as smartphones, tablets, and wearable devices benefit from the low dropout voltage and high output current capability of the MPQ2918GL-Z.

2. Industrial Control Systems: The regulator finds applications in industrial control systems, providing stable power supply for sensors, actuators, and other components.

3. Automotive Electronics: With its wide operating temperature range and protection features, the MPQ2918GL-Z is suitable for automotive applications, including infotainment systems, lighting controls, and engine management modules.

4. Telecommunications Equipment: The regulator can be utilized in telecommunications equipment, ensuring reliable power delivery to network devices, routers, and communication modules.

Detailed and Complete Alternative Models

1. LM1117-ADJ: Adjustable Low Dropout Voltage Regulator with similar specifications and pin configuration.
2. LT1763-ADJ: High Performance Low Dropout Voltage Regulator offering adjustable output voltage and low qu