L4940V85

Product Overview

Category: Voltage Regulator
Use: To regulate and stabilize the output voltage in electronic circuits
Characteristics: High precision, low dropout voltage, high current capability
Package: TO-220
Essence: Linear voltage regulator
Packaging/Quantity: Available in tape and reel packaging, quantity varies depending on supplier

Specifications

Input Voltage: Up to 35V
Output Voltage: 8.5V
Output Current: Up to 1.5A
Dropout Voltage: 1.2V (typical)
Line Regulation: 0.04% (typical)
Load Regulation: 0.3% (typical)
Operating Temperature Range: -40°C to +125°C

Pin Configuration

The L4940V85 has a standard TO-220 package with three pins:

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

Functional Features

High Precision: The L4940V85 offers excellent voltage regulation accuracy, ensuring a stable output voltage even under varying load conditions.
Low Dropout Voltage: With a low dropout voltage of 1.2V, this regulator can maintain a stable output voltage even when the input voltage is close to the desired output voltage.
High Current Capability: Capable of delivering up to 1.5A of continuous output current, making it suitable for various applications requiring higher power.

Advantages and Disadvantages

Advantages: - High precision voltage regulation - Low dropout voltage - High current capability - Wide operating temperature range

Disadvantages: - Requires external capacitors for stability - Higher power dissipation compared to switching regulators

Working Principles

The L4940V85 is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It compares the reference voltage with the feedback voltage and adjusts the pass transistor accordingly to maintain a stable output voltage.

Detailed Application Field Plans

The L4940V85 can be used in various applications, including but not limited to: - Power supplies for microcontrollers and other digital circuits - Battery charging circuits - Automotive electronics - Industrial control systems - Audio amplifiers

Detailed and Complete Alternative Models

Some alternative models to the L4940V85 include: - LM317: Adjustable voltage regulator with similar characteristics - LT1085: Fixed output voltage regulator with higher current capability - LM7808: Fixed 8V voltage regulator with lower current capability

These alternative models offer different features and specifications, allowing users to choose the most suitable option for their specific application.

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Noem 10 veelgestelde vragen en antwoorden met betrekking tot de toepassing van L4940V85 in technische oplossingen

Sure! Here are 10 common questions and answers related to the application of L4940V85 in technical solutions:

Q: What is L4940V85? A: L4940V85 is a voltage regulator IC that provides a fixed output voltage of 8.5V.
Q: What is the maximum input voltage for L4940V85? A: The maximum input voltage for L4940V85 is 35V.
Q: What is the maximum output current of L4940V85? A: The maximum output current of L4940V85 is 1.5A.
Q: Can L4940V85 be used in automotive applications? A: Yes, L4940V85 can be used in automotive applications as it has a wide operating temperature range and is designed to withstand harsh environments.
Q: Is L4940V85 suitable for low-power applications? A: No, L4940V85 is not suitable for low-power applications as it has a relatively high quiescent current (around 10mA).
Q: Does L4940V85 require any external components for operation? A: Yes, L4940V85 requires an input capacitor and an output capacitor for stable operation.
Q: Can L4940V85 handle short-circuit conditions? A: Yes, L4940V85 has built-in protection features like thermal shutdown and current limiting to handle short-circuit conditions.
Q: What is the dropout voltage of L4940V85? A: The dropout voltage of L4940V85 is typically around 1.2V at full load.
Q: Can L4940V85 be used in battery-powered applications? A: Yes, L4940V85 can be used in battery-powered applications as it has a low quiescent current compared to other linear regulators.
Q: Is L4940V85 available in different package options? A: Yes, L4940V85 is available in different package options like TO-220 and DPAK for ease of integration into various designs.

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