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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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací L4940V85 v technických řešeních

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.