LD1117DT30

Product Overview

• Category: Voltage Regulator
• Use: LD1117DT30 is a low dropout linear voltage regulator designed to provide a fixed output voltage of 3.0V with a maximum current of 800mA.
• Characteristics: It offers low dropout voltage, high accuracy, and excellent line and load regulation. The device operates within a wide input voltage range and is suitable for various applications.
• Package: LD1117DT30 comes in a TO-252 package, also known as DPAK (Plastic Package).
• Essence: The LD1117DT30 is an essential component in electronic circuits that require a stable and regulated power supply at 3.0V.
• Packaging/Quantity: The LD1117DT30 is typically sold in reels or tubes, with a quantity of 250 units per reel/tube.

Specifications

• Input Voltage Range: 4.2V to 15V
• Output Voltage: 3.0V
• Maximum Output Current: 800mA
• Dropout Voltage: 1.2V (typical)
• Line Regulation: ±0.2% (typical)
• Load Regulation: ±0.4% (typical)
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LD1117DT30 has three pins:

1. Input (VIN): This pin is used to connect the input voltage source.
2. Ground (GND): This pin is connected to the ground reference.
3. Output (VOUT): This pin provides the regulated output voltage of 3.0V.

Functional Features

• Low dropout voltage ensures efficient power conversion even when the input voltage is close to the desired output voltage.
• High accuracy and excellent line/load regulation provide a stable output voltage under varying conditions.
• Overcurrent and thermal protection features safeguard the device and connected circuitry from damage.

Advantages

• Wide input voltage range allows for flexibility in various applications.
• Low dropout voltage minimizes power dissipation and improves efficiency.
• Compact TO-252 package provides ease of integration into circuit designs.
• Excellent line and load regulation ensure a stable output voltage.

Disadvantages

• Limited maximum output current of 800mA may not be suitable for high-power applications.
• Dropout voltage of 1.2V may result in higher power dissipation compared to other regulators with lower dropout voltages.

Working Principles

The LD1117DT30 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, adjusting the pass transistor's resistance to maintain a constant output voltage of 3.0V.

Detailed Application Field Plans

The LD1117DT30 is widely used in various electronic devices and systems, including:

1. Battery-powered devices: Provides a stable 3.0V supply for microcontrollers, sensors, and other low-power components.
2. Embedded systems: Ensures reliable power for digital circuits, communication modules, and memory devices.
3. Automotive electronics: Used in automotive control units, infotainment systems, and lighting applications.
4. Industrial equipment: Provides regulated power for sensors, actuators, and control circuits.
5. Consumer electronics: Suitable for portable audio players, handheld gaming devices, and other battery-operated gadgets.

Alternative Models

• LM1117-3.0: Similar specifications and pin configuration, available in different packages.
• LT1117-3.0: Offers enhanced performance and additional features, but at a higher cost.
• LP2985-3.0: Low quiescent current and small package size, suitable for power-sensitive applications.

Note: This is not an exhaustive list, and there are several other alternative models available in the market.

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