L78M15CDT-TR

Product Overview

Category

L78M15CDT-TR belongs to the category of voltage regulators.

Use

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

Characteristics

• Input Voltage Range: 17V to 35V
• Output Voltage: +15V
• Output Current: 0.5A
• Dropout Voltage: 2V
• Line Regulation: ±0.04%
• Load Regulation: ±0.1%
• Operating Temperature Range: -40°C to +125°C
• Package Type: DPAK (TO-252)
• Essence: Linear voltage regulator

Packaging/Quantity

The L78M15CDT-TR is typically packaged in reels, with 2,500 units per reel.

Specifications

• Input Voltage Range: 17V to 35V
• Output Voltage: +15V
• Output Current: 0.5A
• Dropout Voltage: 2V
• Line Regulation: ±0.04%
• Load Regulation: ±0.1%
• Quiescent Current: 6mA
• Ripple Rejection Ratio: 62dB
• Thermal Shutdown Protection: Yes
• Short Circuit Protection: Yes
• Package Type: DPAK (TO-252)
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The L78M15CDT-TR has three pins:

1. INPUT (Pin 1): This pin is connected to the input voltage source.
2. GROUND (Pin 2): This pin is connected to the ground or common reference point.
3. OUTPUT (Pin 3): This pin provides the regulated output voltage.

Functional Features

• Regulates and stabilizes the input voltage to a constant +15V output.
• Provides protection against thermal shutdown and short circuits.
• Offers excellent 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

• Simple and reliable voltage regulation solution.
• Wide operating temperature range allows for use in various environments.
• Compact DPAK package facilitates easy integration into circuit designs.
• Thermal shutdown and short circuit protection enhance safety and durability.

Disadvantages

• Limited output current capacity (0.5A) may not be suitable for high-power applications.
• Dropout voltage of 2V may restrict usage in low voltage scenarios.

Working Principles

The L78M15CDT-TR is a linear voltage regulator that uses 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 +15V output. The regulator operates by dissipating excess voltage as heat, which is why it has a dropout voltage of 2V.

Detailed Application Field Plans

The L78M15CDT-TR is commonly used in various electronic applications, including:

1. Power supplies for microcontrollers and other digital ICs.
2. Audio amplifiers and preamplifiers.
3. Industrial control systems.
4. Automotive electronics.
5. Battery charging circuits.
6. LED lighting systems.

Detailed and Complete Alternative Models

1. LM7815: This is a popular alternative from Texas Instruments with similar specifications and pin configuration.
2. MC7815: Another alternative from ON Semiconductor, offering comparable performance and compatibility.
3. UA7815: A voltage regulator from Fairchild Semiconductor, providing similar functionality and characteristics.

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

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