LD1117DT50CTR

Product Overview

• Category: Voltage Regulator
• Use: LD1117DT50CTR is a low dropout linear voltage regulator designed to provide a fixed output voltage of 5V with a maximum current of 800mA.
• Characteristics: It offers a low dropout voltage, high accuracy, and low quiescent current, making it suitable for various applications.
• Package: LD1117DT50CTR comes in a small surface-mount SOT-223 package.
• Essence: The essence of LD1117DT50CTR lies in its ability to regulate the input voltage and provide a stable output voltage of 5V.
• Packaging/Quantity: LD1117DT50CTR is typically sold in reels containing 2500 units.

Specifications

• Input Voltage Range: 6.2V to 20V
• Output Voltage: 5V
• Maximum Output Current: 800mA
• Dropout Voltage: 1.2V (at 800mA)
• Quiescent Current: 5mA
• Line Regulation: ±0.2%
• Load Regulation: ±0.4%
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

LD1117DT50CTR has three pins:

1. Input (IN): This pin is connected to the input voltage source.
2. Ground (GND): This pin is connected to the ground reference.
3. Output (OUT): This pin provides the regulated output voltage of 5V.

Functional Features

• Low dropout voltage ensures efficient regulation even when the input voltage is close to the desired output voltage.
• High accuracy guarantees a stable output voltage within specified tolerances.
• Low quiescent current minimizes power consumption when the load is light.
• Overcurrent and thermal protection mechanisms safeguard the regulator and connected components.

Advantages

• Compact SOT-223 package allows for easy integration into space-constrained designs.
• Wide input voltage range enables compatibility with various power sources.
• Excellent line and load regulation ensure a stable output voltage under different operating conditions.
• Robust protection features enhance reliability and prevent damage to the regulator.

Disadvantages

• Limited maximum output current of 800mA may not be sufficient for high-power applications.
• Dropout voltage of 1.2V can result in higher power dissipation compared to low dropout regulators.

Working Principles

LD1117DT50CTR operates based on the principle of linear voltage regulation. It uses a pass transistor to regulate the output voltage by adjusting the resistance between the input and output terminals. The internal circuitry compares the output voltage with a reference voltage and adjusts the pass transistor accordingly to maintain a constant 5V output.

Detailed Application Field Plans

LD1117DT50CTR finds applications in various fields, including:

1. Embedded Systems: It provides a stable power supply for microcontrollers, sensors, and other components in embedded systems.
2. Consumer Electronics: LD1117DT50CTR can be used in portable devices, such as smartphones, tablets, and digital cameras, to regulate the voltage for different subsystems.
3. Automotive: It is suitable for automotive applications, such as powering infotainment systems, navigation units, and lighting modules.
4. Industrial Control: LD1117DT50CTR ensures reliable voltage regulation in industrial control systems, PLCs, and motor drives.

Alternative Models

• LM1117-5.0: A similar voltage regulator with comparable specifications and pin configuration.
• LT1117-5: Another alternative offering enhanced performance and lower dropout voltage.
• L78M05CV: A popular alternative with a TO-220 package and higher maximum output current.

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