AN79L18M

Product Overview

Category: Integrated Circuit (IC)
Use: Voltage Regulator
Characteristics: Low Dropout, Fixed Output Voltage
Package: TO-252, 3-Pin
Essence: AN79L18M is a voltage regulator IC that provides a fixed output voltage of -18V with low dropout characteristics.
Packaging/Quantity: Available in reels or tubes, quantity varies based on manufacturer.

Specifications

Input Voltage Range: -20V to -35V
Output Voltage: -18V
Output Current: Up to 100mA
Dropout Voltage: 1.2V (typical)
Operating Temperature Range: -40°C to +125°C
Line Regulation: ±0.5% (typical)
Load Regulation: ±1% (typical)

Detailed Pin Configuration

AN79L18M has a standard 3-pin configuration:

Input Pin (VIN): Connects to the input voltage source (-20V to -35V).
Ground Pin (GND): Connected to the ground reference.
Output Pin (VOUT): Provides the regulated output voltage of -18V.

Functional Features

Voltage Regulation: AN79L18M ensures a stable -18V output voltage even with varying input voltages.
Low Dropout: The IC has a low dropout voltage of 1.2V, allowing it to regulate the output voltage efficiently.
Short Circuit Protection: AN79L18M includes built-in protection against short circuits, preventing damage to the IC and connected components.
Thermal Shutdown: The IC incorporates thermal shutdown protection to prevent overheating during prolonged operation.

Advantages and Disadvantages

Advantages: - Provides a fixed -18V output voltage. - Low dropout voltage ensures efficient regulation. - Built-in short circuit protection. - Thermal shutdown feature prevents overheating.

Disadvantages: - Limited output current capability (up to 100mA). - Requires an input voltage within the specified range (-20V to -35V).

Working Principles

AN79L18M is a linear voltage regulator that uses a series pass transistor to regulate the output voltage. It compares the reference voltage (-18V) with the feedback voltage from the output, adjusting the pass transistor's resistance to maintain a stable -18V output.

Detailed Application Field Plans

AN79L18M finds applications in various electronic devices and systems where a regulated -18V voltage is required. Some common application fields include:

Audio Amplifiers: AN79L18M can be used to provide a stable -18V supply voltage for audio amplifiers, ensuring consistent performance.
Industrial Control Systems: The IC can regulate the voltage in control systems, providing a reliable power source for sensors, actuators, and other components.
Test and Measurement Equipment: AN79L18M is suitable for powering analog circuits in test and measurement equipment, maintaining accurate measurements.

Detailed and Complete Alternative Models

LM7918: Similar to AN79L18M, this IC provides a fixed -18V output voltage with low dropout characteristics.
MC79L18: Another alternative with the same -18V output voltage and low dropout features.
UA79L18: This IC also offers a fixed -18V output voltage and is compatible with AN79L18M.

These alternative models can be considered based on availability, pricing, and specific requirements of the application.

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Noem 10 veelgestelde vragen en antwoorden met betrekking tot de toepassing van AN79L18M in technische oplossingen

Sure! Here are 10 common questions and answers related to the application of AN79L18M in technical solutions:

Q: What is AN79L18M? A: AN79L18M is a voltage regulator integrated circuit (IC) that provides a fixed output voltage of -18V.
Q: What is the input voltage range for AN79L18M? A: The input voltage range for AN79L18M is typically between -20V and -35V.
Q: What is the maximum output current of AN79L18M? A: The maximum output current of AN79L18M is around 100mA.
Q: Can AN79L18M be used in both AC and DC applications? A: Yes, AN79L18M can be used in both AC and DC applications as long as the input voltage falls within the specified range.
Q: Is AN79L18M suitable for low-power applications? A: Yes, AN79L18M is commonly used in low-power applications where a stable -18V output voltage is required.
Q: Does AN79L18M require any external components for operation? A: Yes, AN79L18M requires a few external components such as capacitors for stability and protection diodes for reliability.
Q: Can AN79L18M handle short-circuit conditions? A: AN79L18M has built-in short-circuit protection, which allows it to handle short-circuit conditions without damage.
Q: What is the operating temperature range of AN79L18M? A: The operating temperature range of AN79L18M is typically between -40°C and +125°C.
Q: Can AN79L18M be used in automotive applications? A: Yes, AN79L18M is suitable for automotive applications as it can withstand the temperature and voltage variations encountered in vehicles.
Q: Are there any alternatives to AN79L18M for -18V voltage regulation? A: Yes, there are other voltage regulator ICs available in the market that provide a fixed -18V output, such as LM7918 or LT1963-1.8.