LM3420M5-8.4

Product Overview

Category

The LM3420M5-8.4 belongs to the category of integrated circuits (ICs) and specifically falls under the voltage regulators category.

Use

This product is primarily used for regulating voltage in electronic devices, ensuring a stable and reliable power supply.

Characteristics

• Input Voltage Range: 4.5V to 30V
• Output Voltage: 8.4V
• Output Current: Up to 1A
• Low Dropout Voltage: 300mV at 1A
• Adjustable Output Voltage
• Thermal Shutdown Protection
• Short Circuit Protection
• Reverse Battery Protection

Package

The LM3420M5-8.4 is available in a compact SOT-23-5 package, which is a surface-mount package with five pins.

Essence

The essence of the LM3420M5-8.4 lies in its ability to regulate voltage efficiently, providing a stable output even when the input voltage fluctuates.

Packaging/Quantity

The LM3420M5-8.4 is typically packaged in reels or tubes, containing a specified quantity of ICs per package. The exact quantity may vary depending on the manufacturer's specifications.

Specifications

• Input Voltage Range: 4.5V to 30V
• Output Voltage: 8.4V
• Output Current: Up to 1A
• Dropout Voltage: 300mV at 1A
• Operating Temperature Range: -40°C to +125°C
• Package Type: SOT-23-5

Pin Configuration

The LM3420M5-8.4 has five pins arranged as follows:

Pin 1: GND Pin 2: Feedback (FB) Pin 3: Enable (EN) Pin 4: Input (IN) Pin 5: Output (OUT)

Functional Features

1. Voltage Regulation: The LM3420M5-8.4 ensures a stable output voltage of 8.4V, even when the input voltage varies.
2. Adjustable Output Voltage: The output voltage can be adjusted using external resistors to meet specific application requirements.
3. Thermal Shutdown Protection: In case of excessive temperature, the IC automatically shuts down to prevent damage.
4. Short Circuit Protection: The LM3420M5-8.4 includes built-in protection against short circuits, safeguarding the device and connected components.
5. Reverse Battery Protection: This feature protects the IC from potential damage caused by reverse polarity connection.

Advantages and Disadvantages

Advantages

• Wide input voltage range allows for versatile applications.
• Low dropout voltage minimizes power dissipation.
• Compact SOT-23-5 package enables space-efficient designs.
• Thermal shutdown and short circuit protection enhance reliability.

Disadvantages

• Limited output current capacity may not be suitable for high-power applications.
• Requires external resistors for adjusting the output voltage.

Working Principles

The LM3420M5-8.4 operates as a linear voltage regulator. It compares the feedback voltage with a reference voltage to regulate the output voltage. By adjusting the resistance in the feedback path, the desired output voltage can be set. The IC continuously monitors the input and output voltages to maintain a stable output within the specified range.

Detailed Application Field Plans

The LM3420M5-8.4 finds applications in various electronic devices that require a regulated 8.4V power supply. Some common application fields include:

1. Battery-powered devices: Portable electronics, such as smartphones, tablets, and digital cameras, often utilize the LM3420M5-8.4 to regulate power from the battery.
2. Automotive electronics: The IC can be used in automotive applications, such as infotainment systems, GPS devices, and lighting control modules.
3. Industrial equipment: The LM3420M5-8.4 is suitable for powering sensors, actuators, and control circuits in industrial automation systems.
4. Communication devices: Wireless routers, modems, and other communication devices benefit from the stable voltage provided by the LM3420M5-8.4.

Detailed and Complete Alternative Models

1. LM317: A widely used adjustable linear voltage regulator with a similar pin configuration and adjustable output voltage.
2. LT1084: A high-current linear voltage regulator capable of delivering up to 5A of output current.
3. LM1117: A low dropout voltage regulator available in various fixed output voltage options.

These alternative models offer different specifications and features, allowing designers to choose the most suitable option based on their specific requirements.

In conclusion, the LM3420M5-8.4 is an integrated circuit voltage regulator that provides stable and reliable 8.4V