LD1117DTTR

Product Overview

• Category: Voltage Regulator
• Use: LD1117DTTR is a low dropout linear voltage regulator designed to provide a stable and regulated output voltage for various electronic devices.
• Characteristics: It offers low dropout voltage, high accuracy, and excellent line and load regulation. The LD1117DTTR is capable of delivering up to 800mA of output current.
• Package: The LD1117DTTR comes in a small surface mount SOT-223 package, which provides thermal efficiency and ease of integration into circuit boards.
• Essence: The essence of the LD1117DTTR lies in its ability to regulate input voltage and provide a stable output voltage, ensuring proper functioning of electronic devices.
• Packaging/Quantity: The LD1117DTTR is typically sold in reels containing 2500 units.

Specifications

• Input Voltage Range: 4.2V to 15V
• Output Voltage Range: 1.2V to 13.8V
• Dropout Voltage: 1.2V (typical)
• Output Current: Up to 800mA
• Line Regulation: ±0.2% (typical)
• Load Regulation: ±0.4% (typical)
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The LD1117DTTR has three pins:

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

Functional Features

• Low dropout voltage ensures efficient regulation even with small input-output voltage differentials.
• High accuracy and excellent line/load regulation provide a stable output voltage under varying conditions.
• Overcurrent and thermal protection mechanisms safeguard the regulator and connected devices.
• Fast transient response enables quick stabilization of the output voltage after load changes.

Advantages

• Small package size allows for space-saving integration in compact electronic designs.
• Wide input voltage range accommodates various power supply sources.
• Low dropout voltage minimizes power dissipation and improves efficiency.
• Excellent line/load regulation ensures stable performance across different operating conditions.

Disadvantages

• Limited output current capacity may not be suitable for high-power applications.
• SOT-223 package may require additional heat sinking for prolonged operation at higher currents.
• Not suitable for applications requiring adjustable output voltage.

Working Principles

The LD1117DTTR operates as a linear voltage regulator, utilizing 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 constant output voltage. The dropout voltage is minimized by using a low resistance pass element.

Detailed Application Field Plans

The LD1117DTTR finds applications in various electronic devices that require a stable and regulated power supply. Some common application fields include:

1. Consumer Electronics: Mobile phones, tablets, digital cameras, portable audio players.
2. Computer Systems: Motherboards, graphics cards, hard drives, solid-state drives.
3. Industrial Equipment: Control systems, motor drivers, sensors, power supplies.
4. Automotive Electronics: Infotainment systems, navigation units, lighting control modules.

Detailed and Complete Alternative Models

1. LM317: A popular general-purpose linear voltage regulator with adjustable output voltage.
2. LDO50V: A low dropout voltage regulator capable of handling higher input voltages.
3. LT1085: A high-current linear voltage regulator with excellent line and load regulation.

These alternative models offer similar functionality and can be considered based on specific requirements and design constraints.

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