LK112M40TR - English Editing Encyclopedia Entry

Product Overview

Category: Electronic Component
Use: Voltage Regulator
Characteristics: High precision, low dropout voltage, compact size
Package: TO-252-3 (DPAK)
Essence: Monolithic IC voltage regulator
Packaging/Quantity: Tape and reel, 2500 units per reel

Specifications

• Input Voltage Range: 4.5V to 40V
• Output Voltage Range: 1.2V to 37V
• Dropout Voltage: 0.6V at 1A load current
• Output Current: Up to 1.5A
• Line Regulation: ±0.02% typical
• Load Regulation: ±0.1% typical
• Quiescent Current: 100µA typical
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The LK112M40TR is a three-pin device with the following pin configuration:

1. Input (VIN): Connects to the input voltage source.
2. Ground (GND): Common ground reference for the regulator.
3. Output (VOUT): Provides the regulated output voltage.

Functional Features

• High precision voltage regulation for various applications.
• Low dropout voltage ensures efficient power conversion.
• Built-in thermal shutdown protection prevents overheating.
• Short-circuit and overcurrent protection for enhanced safety.
• Reverse polarity protection guards against incorrect connections.
• Fast transient response for stable operation during load changes.

Advantages and Disadvantages

Advantages: - Wide input voltage range allows flexibility in different applications. - Compact size enables space-saving designs. - Excellent line and load regulation for precise voltage control. - Low quiescent current minimizes power consumption. - Robust protection features enhance reliability.

Disadvantages: - Maximum output current limited to 1.5A. - Dropout voltage of 0.6V may not be suitable for ultra-low power applications.

Working Principles

The LK112M40TR is a monolithic IC voltage regulator that utilizes a feedback control mechanism to maintain a stable output voltage. It operates by comparing the output voltage with a reference voltage and adjusting the internal pass transistor accordingly. This ensures that the output voltage remains constant, even when the input voltage or load conditions change.

Detailed Application Field Plans

The LK112M40TR is widely used in various electronic devices and systems, including:

1. Power supplies for industrial equipment.
2. Automotive electronics, such as infotainment systems and lighting controls.
3. Consumer electronics, including televisions, audio systems, and gaming consoles.
4. Communication systems, such as routers and modems.
5. Medical devices, such as patient monitoring systems and diagnostic equipment.

Detailed and Complete Alternative Models

1. LM317: Adjustable voltage regulator with similar characteristics.
2. L7805CV: Fixed 5V voltage regulator suitable for low-power applications.
3. LT1083CP: High-current adjustable voltage regulator for demanding applications.
4. LM1117-3.3: Fixed 3.3V voltage regulator with low dropout voltage.
5. TPS7A4700: Ultra-low noise, high PSRR voltage regulator for sensitive applications.

Note: The above list is not exhaustive and serves as a starting point for alternative models.

In conclusion, the LK112M40TR is a versatile voltage regulator offering high precision, low dropout voltage, and compact size. Its robust features, wide application range, and availability of alternative models make it a popular choice in various electronic systems.