LM3544MX-H/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

Characteristics: - High efficiency - Low dropout voltage - Adjustable output voltage - Overcurrent protection - Thermal shutdown protection

Package: SOIC (Small Outline Integrated Circuit)

Essence: The LM3544MX-H/NOPB is a voltage regulator IC that provides a stable output voltage for various electronic devices.

Packaging/Quantity: The LM3544MX-H/NOPB is available in a standard SOIC package. It is typically sold in reels of 2500 units.

Specifications

• Input Voltage Range: 2.7V to 5.5V
• Output Voltage Range: 1.2V to 3.6V
• Output Current: Up to 500mA
• Dropout Voltage: 200mV at 100mA
• Quiescent Current: 75µA
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM3544MX-H/NOPB has the following pin configuration:

```

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

• Vout: Output voltage pin
• Vin: Input voltage pin
• GND: Ground pin
• EN: Enable pin (active high)
• FB: Feedback pin

Functional Features

• High Efficiency: The LM3544MX-H/NOPB offers high efficiency, minimizing power loss and maximizing battery life in portable devices.
• Low Dropout Voltage: With a low dropout voltage of 200mV at 100mA, the IC can maintain a stable output voltage even when the input voltage is close to the desired output voltage.
• Adjustable Output Voltage: The output voltage can be adjusted within the range of 1.2V to 3.6V, providing flexibility for various applications.
• Overcurrent Protection: The IC incorporates overcurrent protection, safeguarding the device and connected components from excessive current flow.
• Thermal Shutdown Protection: To prevent overheating, the LM3544MX-H/NOPB includes thermal shutdown protection, automatically disabling the regulator when the temperature exceeds a certain threshold.

Advantages and Disadvantages

Advantages: - High efficiency leads to longer battery life. - Adjustable output voltage allows for versatile applications. - Overcurrent and thermal shutdown protection enhance reliability and safety.

Disadvantages: - Limited output current capacity (up to 500mA). - Requires external components for proper operation.

Working Principles

The LM3544MX-H/NOPB operates as a linear voltage regulator. It regulates the output voltage by comparing the feedback voltage (FB) with a reference voltage. When the output voltage deviates from the desired value, the regulator adjusts the pass transistor to maintain a stable output voltage.

Detailed Application Field Plans

The LM3544MX-H/NOPB is suitable for a wide range of applications, including but not limited to: - Battery-powered devices - Portable electronic devices - IoT (Internet of Things) devices - Consumer electronics - Industrial equipment

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the LM3544MX-H/NOPB include: - LM317: Adjustable voltage regulator with higher output current capacity. - LM1117: Fixed voltage regulator with low dropout voltage. - LT1084: Adjustable voltage regulator with high current capability and low dropout voltage.

These alternative models can be considered based on specific requirements and application needs.

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