L4949EDMITTR

Product Overview

Category: Integrated Circuit (IC)
Use: Voltage Regulator
Characteristics: Low-dropout, adjustable output voltage
Package: SOT-223
Essence: Regulates input voltage to a stable output voltage
Packaging/Quantity: Tape and reel, 2500 units per reel

Specifications

Input Voltage Range: 4.5V to 20V
Output Voltage Range: 1.2V to 18V
Dropout Voltage: 0.45V at 1A load current
Output Current: Up to 1.5A
Line Regulation: ±0.2% typical
Load Regulation: ±0.4% typical
Quiescent Current: 80µA typical
Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The L4949EDMITTR IC has the following pin configuration:

GND (Ground)
Vout (Output Voltage)
Vin (Input Voltage)
ADJ (Adjustment Pin)

Functional Features

Low dropout voltage ensures efficient regulation even with small voltage differences between input and output.
Adjustable output voltage allows for flexibility in various applications.
Excellent line and load regulation ensures stable output voltage under different operating conditions.
Thermal shutdown protection prevents damage due to excessive temperature.

Advantages

Wide input voltage range enables compatibility with various power sources.
High output current capability supports demanding loads.
Low quiescent current minimizes power consumption during standby or idle mode.
Compact SOT-223 package offers space-saving benefits.

Disadvantages

Dropout voltage of 0.45V may limit efficiency in certain low-power applications.
Limited output voltage range may not meet the requirements of some specialized applications.

Working Principles

The L4949EDMITTR is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It operates by comparing the reference voltage with the feedback voltage obtained from the ADJ pin. The internal circuitry adjusts the pass transistor to maintain a stable output voltage, compensating for changes in input voltage and load conditions.

Detailed Application Field Plans

The L4949EDMITTR is commonly used in various electronic devices and systems, including:

Power supplies for consumer electronics
Automotive applications
Industrial control systems
Battery-powered devices
Telecommunications equipment

Detailed and Complete Alternative Models

LM317: Adjustable voltage regulator with higher output current capability.
LT1084: Low dropout voltage regulator with adjustable output voltage.
LM1117: Fixed output voltage regulator with low quiescent current.

These alternative models offer similar functionality and can be considered as substitutes for the L4949EDMITTR based on specific application requirements.

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Noem 10 veelgestelde vragen en antwoorden met betrekking tot de toepassing van L4949EDMITTR in technische oplossingen

Sure! Here are 10 common questions and answers related to the application of L4949EDMITTR in technical solutions:

Q: What is L4949EDMITTR? A: L4949EDMITTR is a voltage regulator IC designed for automotive applications, specifically for supplying power to electronic control units (ECUs) in vehicles.
Q: What is the input voltage range of L4949EDMITTR? A: The input voltage range of L4949EDMITTR is typically between 5V and 40V.
Q: What is the output voltage range of L4949EDMITTR? A: The output voltage range of L4949EDMITTR is adjustable and can be set between 5V and 28V.
Q: Can L4949EDMITTR handle high current loads? A: Yes, L4949EDMITTR has a maximum output current capability of up to 1.5A, making it suitable for driving various electronic components in automotive systems.
Q: Is L4949EDMITTR protected against overvoltage and overcurrent conditions? A: Yes, L4949EDMITTR incorporates built-in protection features such as overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown to safeguard the connected circuitry.
Q: Can L4949EDMITTR operate in harsh automotive environments? A: Yes, L4949EDMITTR is designed to withstand the demanding conditions of automotive applications, including wide temperature ranges and high levels of electrical noise.
Q: Does L4949EDMITTR require any external components for operation? A: Yes, L4949EDMITTR requires a few external components such as input/output capacitors and resistors to set the output voltage.
Q: Can L4949EDMITTR be used in non-automotive applications? A: While L4949EDMITTR is primarily designed for automotive use, it can also be employed in other technical solutions where a regulated power supply with similar specifications is required.
Q: What is the typical efficiency of L4949EDMITTR? A: The efficiency of L4949EDMITTR depends on various factors such as input/output voltage differentials and load conditions. However, it typically achieves efficiencies of around 80-90%.
Q: Are there any application notes or reference designs available for L4949EDMITTR? A: Yes, the manufacturer of L4949EDMITTR provides application notes and reference designs that offer guidance on using the IC effectively in different automotive and non-automotive applications.