LD1117D50

Product Overview

• Category: Voltage Regulator
• Use: LD1117D50 is a low dropout linear voltage regulator designed to provide a fixed output voltage of 5V with a maximum current of 800mA.
• Characteristics:
  • Low dropout voltage
  • High ripple rejection
  • Thermal overload protection
  • Short circuit protection
• Package: TO-252 (DPAK)
• Essence: LD1117D50 is an essential component in electronic circuits that require a stable and regulated 5V power supply.
• Packaging/Quantity: The LD1117D50 is typically sold in reels or tubes, with each reel/tube containing a specific quantity of regulators.

Specifications

• Input Voltage Range: 6.5V to 15V
• Output Voltage: 5V
• Maximum Output Current: 800mA
• Dropout Voltage: 1.2V (typical)
• Ripple Rejection: 70dB (typical)
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LD1117D50 has three pins:

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

Functional Features

• Low Dropout Voltage: LD1117D50 has a low dropout voltage, which means it can regulate the output voltage even when the input voltage is only slightly higher than the desired output voltage.
• High Ripple Rejection: The regulator has a high ripple rejection capability, allowing it to filter out noise and provide a clean and stable output voltage.
• Thermal Overload Protection: LD1117D50 incorporates thermal overload protection, which prevents the regulator from overheating and getting damaged under excessive load or high ambient temperature conditions.
• Short Circuit Protection: The regulator is equipped with short circuit protection, ensuring that it shuts down in case of a short circuit to protect the circuitry.

Advantages

• Easy to use and integrate into electronic circuits.
• Provides a stable and regulated 5V output voltage.
• Low dropout voltage allows for efficient regulation even with low input voltages.
• High ripple rejection ensures a clean output voltage.
• Offers thermal overload and short circuit protection for enhanced reliability.

Disadvantages

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

Working Principles

The LD1117D50 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. By maintaining a constant voltage drop across the pass transistor, the regulator ensures a stable output voltage regardless of variations in the input voltage.

Detailed Application Field Plans

The LD1117D50 finds applications in various electronic devices and systems, including but not limited to:

1. Microcontroller-based projects requiring a stable 5V power supply.
2. Battery-powered devices where a regulated voltage is necessary.
3. Audio amplifiers and signal processing circuits.
4. Embedded systems and development boards.
5. Industrial control systems and automation equipment.

Detailed and Complete Alternative Models

1. LM317: A popular general-purpose adjustable voltage regulator capable of providing a wide range of output voltages.
2. L7805: A fixed 5V voltage regulator with a higher maximum output current of 1.5A.
3. AMS1117-5.0: Another fixed 5V voltage regulator with similar characteristics to LD1117D50.

These alternative models offer similar functionality and can be used as substitutes for LD1117D50 depending on specific requirements and availability.

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