L78L09ACZ

Product Overview

Category: Voltage Regulator
Use: To regulate and stabilize the output voltage in electronic circuits
Characteristics:
- Fixed output voltage of 9V
- Low dropout voltage
- High ripple rejection ratio
- Thermal overload protection
Package: TO-92 (Through-Hole)
Essence: Linear voltage regulator
Packaging/Quantity: Available in reels or tubes, quantity depends on manufacturer

Specifications

Input Voltage Range: 10.5V to 35V
Output Voltage: 9V
Output Current: Up to 100mA
Dropout Voltage: 2V (max)
Ripple Rejection Ratio: 62dB (typ)
Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The L78L09ACZ has three pins:

Input (Vin): Connects to the input voltage source.
Ground (GND): Connected to the ground reference.
Output (Vout): Provides the regulated output voltage.

Functional Features

Regulates the output voltage to a fixed 9V.
Provides a stable output even with varying input voltage.
Protects against thermal overload, preventing damage to the device.
Filters out high-frequency noise, ensuring a clean output signal.

Advantages

Simple and easy to use.
Low dropout voltage allows for efficient regulation.
High ripple rejection ratio ensures a clean output signal.
Thermal overload protection enhances reliability.

Disadvantages

Limited output current capability (up to 100mA).
Requires an input voltage higher than the desired output voltage.

Working Principles

The L78L09ACZ is a linear voltage regulator that uses a series pass transistor to maintain a constant output voltage. It compares the output voltage with a reference voltage and adjusts the pass transistor accordingly to regulate the output. The device dissipates excess voltage as heat, which is why it has a maximum dropout voltage specification.

Detailed Application Field Plans

The L78L09ACZ is commonly used in various electronic applications, including:

Power supply circuits for microcontrollers and other low-power devices.
Battery-powered devices requiring a stable 9V supply.
Audio amplifiers and preamplifiers.
Voltage regulators for analog circuits.
Automotive electronics.

Detailed and Complete Alternative Models

LM7809: Similar specifications and functionality, available in different packages.
MC7809: Equivalent voltage regulator from another manufacturer.
UA7809: Another alternative with comparable characteristics.

These alternative models can be used as substitutes for the L78L09ACZ depending on availability and specific requirements.

Word count: 346 words

Noem 10 veelgestelde vragen en antwoorden met betrekking tot de toepassing van L78L09ACZ in technische oplossingen

Sure! Here are 10 common questions and answers related to the application of L78L09ACZ in technical solutions:

Q: What is L78L09ACZ? A: L78L09ACZ is a voltage regulator IC that provides a fixed output voltage of +9V.
Q: What is the input voltage range for L78L09ACZ? A: The input voltage range for L78L09ACZ is typically between 11V and 35V.
Q: What is the maximum output current of L78L09ACZ? A: The maximum output current of L78L09ACZ is 100mA.
Q: Can L78L09ACZ handle higher input voltages? A: No, L78L09ACZ is designed to operate within the specified input voltage range. Exceeding this range may damage the IC.
Q: Is L78L09ACZ suitable for battery-powered applications? A: Yes, L78L09ACZ can be used in battery-powered applications as long as the input voltage remains within the specified range.
Q: Does L78L09ACZ require any external components for operation? A: Yes, L78L09ACZ requires input and output capacitors for stability and filtering purposes. Refer to the datasheet for recommended values.
Q: Can L78L09ACZ be used in automotive applications? A: No, L78L09ACZ is not specifically designed for automotive applications. It may not meet the required standards and specifications.
Q: What is the thermal resistance of L78L09ACZ? A: The thermal resistance of L78L09ACZ is typically around 50°C/W, which indicates its ability to dissipate heat.
Q: Can L78L09ACZ be used in high-temperature environments? A: L78L09ACZ has a maximum operating temperature of 125°C. It should not be used in environments exceeding this temperature.
Q: Are there any alternatives to L78L09ACZ for +9V voltage regulation? A: Yes, there are other voltage regulator ICs available in the market that provide a fixed output voltage of +9V. Some alternatives include LM7809 and UA78M09.

Please note that these answers are general and may vary depending on specific datasheet specifications and application requirements.