L78M08ABDT-1

Product Overview

Category

L78M08ABDT-1 belongs to the category of voltage regulators.

Use

It is primarily used for regulating and stabilizing voltage in electronic circuits.

Characteristics

• Input Voltage: 10V - 35V
• Output Voltage: 8V
• Maximum Output Current: 500mA
• Package Type: TO-252 (DPAK)
• Operating Temperature Range: -40°C to +125°C
• Dropout Voltage: 2V (typical)

Packaging/Quantity

The L78M08ABDT-1 is available in a standard reel packaging with 2,500 units per reel.

Specifications

• Input Voltage Range: 10V - 35V
• Output Voltage: 8V ±4%
• Output Current: Up to 500mA
• Dropout Voltage: 2V (typical)
• Line Regulation: ±0.2% (typical)
• Load Regulation: ±0.4% (typical)
• Quiescent Current: 5mA (typical)
• Ripple Rejection Ratio: 60dB (typical)
• Thermal Shutdown Protection: Yes
• Short Circuit Protection: Yes

Pin Configuration

The L78M08ABDT-1 has three pins:

1. Input (VIN): This pin is connected to the input voltage source.
2. Ground (GND): This pin is connected to the ground or common reference point.
3. Output (VOUT): This pin provides the regulated output voltage.

Functional Features

• Regulates and stabilizes the input voltage to a constant 8V output.
• Provides protection against thermal shutdown and short circuits.
• Offers good line and load regulation for stable performance.
• Low dropout voltage ensures efficient operation even with low input voltages.
• High ripple rejection ratio minimizes the impact of input voltage fluctuations.

Advantages

• Compact TO-252 package allows for easy integration into various electronic circuits.
• Wide operating temperature range (-40°C to +125°C) enables usage in extreme environments.
• Provides a stable and reliable output voltage, ensuring proper functioning of connected devices.
• Offers protection against thermal shutdown and short circuits, enhancing overall system safety.

Disadvantages

• Limited maximum output current of 500mA may not be sufficient for high-power applications.
• Dropout voltage of 2V may result in higher power dissipation and reduced efficiency in low input voltage scenarios.

Working Principles

The L78M08ABDT-1 is a linear voltage regulator that utilizes a series pass transistor to regulate the output voltage. It compares the output voltage with a reference voltage and adjusts the pass transistor accordingly to maintain a constant 8V output. The regulator also incorporates thermal shutdown and short circuit protection mechanisms to safeguard the connected circuitry.

Detailed Application Field Plans

The L78M08ABDT-1 can be used in various applications, including but not limited to:

1. Power supply circuits for microcontrollers and other digital ICs.
2. Battery-powered devices requiring a regulated 8V supply.
3. Automotive electronics, such as dashboard displays and infotainment systems.
4. Industrial control systems and automation equipment.
5. Audio amplifiers and preamplifiers.

Detailed and Complete Alternative Models

1. LM7808: A popular alternative from Texas Instruments with similar specifications and pin configuration.
2. MC78M08: Another alternative from ON Semiconductor offering comparable performance and compatibility.
3. UA7808: An alternative from Fairchild Semiconductor known for its reliability and wide availability.

These alternative models can be considered based on specific requirements and availability in different regions.

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