LK112SM40TR - English Editing Encyclopedia Entry

Product Overview

Category: Electronic Component
Use: Power Management
Characteristics: High Efficiency, Low Power Consumption
Package: Surface Mount Technology (SMT)
Essence: Voltage Regulator
Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

• Input Voltage Range: 4.5V to 18V
• Output Voltage: 3.3V
• Output Current: 1A
• Dropout Voltage: 200mV at 1A
• Quiescent Current: 100μA
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The LK112SM40TR has a total of 6 pins:

1. VIN (Input Voltage)
2. GND (Ground)
3. EN (Enable)
4. FB (Feedback)
5. VOUT (Output Voltage)
6. PG (Power Good)

Functional Features

• High Efficiency: The LK112SM40TR offers high efficiency, ensuring minimal power loss during voltage regulation.
• Low Power Consumption: With a quiescent current of only 100μA, the LK112SM40TR minimizes power consumption when in standby or idle mode.
• Voltage Regulation: This component acts as a voltage regulator, maintaining a stable output voltage of 3.3V regardless of input voltage fluctuations.
• Enable Pin: The EN pin allows for easy control of the device's operation, enabling or disabling the voltage regulation functionality.
• Power Good Indicator: The PG pin provides an indication of the output voltage status, signaling when it reaches a stable level.

Advantages and Disadvantages

Advantages: - High efficiency ensures optimal power usage. - Low power consumption reduces energy waste. - Stable output voltage guarantees reliable performance. - Enable pin allows for easy control of the device. - Power good indicator provides visual feedback on voltage stability.

Disadvantages: - Limited output current of 1A may not be suitable for high-power applications. - Dropout voltage of 200mV may result in a slight voltage drop across the regulator.

Working Principles

The LK112SM40TR operates based on the principle of voltage regulation. It takes an input voltage ranging from 4.5V to 18V and regulates it to a stable output voltage of 3.3V. This is achieved by utilizing internal circuitry that adjusts the voltage levels as necessary, compensating for any fluctuations in the input voltage. The EN pin allows the user to enable or disable the voltage regulation functionality, while the PG pin provides an indication of the output voltage stability.

Detailed Application Field Plans

The LK112SM40TR finds application in various electronic devices and systems that require stable power management. Some potential application fields include:

1. Consumer Electronics: Used in smartphones, tablets, and portable media players to regulate the voltage supplied to different components.
2. Industrial Automation: Employed in industrial control systems, PLCs (Programmable Logic Controllers), and motor drives to ensure consistent power supply.
3. Automotive Electronics: Integrated into automotive systems such as infotainment systems, navigation units, and engine control modules to maintain stable voltage levels.
4. Telecommunications: Utilized in networking equipment, routers, and switches to regulate power for reliable data transmission.
5. Medical Devices: Incorporated into medical equipment like patient monitors, infusion pumps, and diagnostic devices to provide precise and stable power.

Detailed and Complete Alternative Models

1. LM317: A popular linear voltage regulator with adjustable output voltage and higher output current capability.
2. MP2307: A synchronous buck converter with high efficiency and a wide input voltage range.
3. LM2596: A step-down switching regulator that offers adjustable output voltage and high power conversion efficiency.
4. TPS62130: An ultra-small, high-efficiency step-down converter suitable for battery-powered applications.

These alternative models provide similar functionality to the LK112SM40TR but may have different specifications and package options.

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