STMicroelectronics
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LD1117F33C
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LD1117F33C

Product Overview

  • Category: Voltage Regulator
  • Use: LD1117F33C is a low dropout voltage regulator designed to provide a fixed 3.3V output voltage with a maximum dropout of 1.2V at 800mA of load current.
  • Characteristics: It offers thermal shutdown and current limit functions, making it suitable for various applications requiring a regulated power supply.
  • Package: The LD1117F33C comes in a TO-220 package, which provides good thermal performance.
  • Essence: This voltage regulator is essential for stabilizing and regulating the voltage in electronic circuits.
  • Packaging/Quantity: Typically available in reels or tubes containing multiple units.

Specifications

  • Input Voltage Range: 4.75V to 15V
  • Output Voltage: 3.3V
  • Dropout Voltage: 1.2V (at 800mA)
  • Maximum Output Current: 800mA
  • Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

The LD1117F33C has three pins: 1. Input (Vin): Connects to the input voltage source. 2. Ground (GND): Connected to the ground reference. 3. Output (Vout): Provides the regulated 3.3V output.

Functional Features

  • Thermal Shutdown: Protects the device from overheating.
  • Current Limit: Prevents excessive current draw, safeguarding the regulator and the load.

Advantages and Disadvantages

Advantages

  • Low dropout voltage allows for efficient regulation.
  • Thermal shutdown feature enhances reliability.
  • Compact TO-220 package facilitates easy integration into circuits.

Disadvantages

  • Limited maximum output current may not be suitable for high-power applications.
  • Dropout voltage may impact efficiency in low input voltage scenarios.

Working Principles

The LD1117F33C operates by comparing the output voltage to a fixed internal reference, adjusting the pass transistor to maintain a stable 3.3V output despite variations in input voltage and load conditions.

Detailed Application Field Plans

The LD1117F33C is commonly used in: - Battery-powered devices - Embedded systems - Consumer electronics - Industrial control systems

Detailed and Complete Alternative Models

  • LM2937: Offers similar characteristics and package type.
  • MCP1700: Provides an alternative low dropout voltage regulator solution.

In conclusion, the LD1117F33C is a reliable and efficient voltage regulator suitable for a wide range of electronic applications, offering stable 3.3V output with minimal dropout voltage.

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací LD1117F33C v technických řešeních

  1. What is LD1117F33C?

    • LD1117F33C is a low dropout voltage regulator that can provide a stable 3.3V output voltage from a higher input voltage.

  2. What is the maximum input voltage for LD1117F33C?

    • The maximum input voltage for LD1117F33C is typically around 15V, but it's important to refer to the datasheet for the specific model being used.

  3. What is the dropout voltage of LD1117F33C?

    • The dropout voltage of LD1117F33C is typically around 1.1V at 800mA load current.

  4. What is the typical output current of LD1117F33C?

    • The typical output current of LD1117F33C is 800mA, but this can vary based on operating conditions and thermal considerations.

  5. Is LD1117F33C suitable for battery-powered applications?

    • Yes, LD1117F33C is suitable for battery-powered applications due to its low dropout voltage and low quiescent current.

  6. Does LD1117F33C require external capacitors for stability?

    • Yes, LD1117F33C requires input and output capacitors for stability, as specified in the datasheet.

  7. Can LD1117F33C handle transient voltage spikes?

    • LD1117F33C has built-in protection features to handle transient voltage spikes within its specified limits.

  8. What are the typical applications of LD1117F33C?

    • LD1117F33C is commonly used in various electronic devices, including battery-powered systems, sensors, and microcontroller-based applications.

  9. Is LD1117F33C available in different package types?

    • Yes, LD1117F33C is available in different package types, such as TO-220, SOT-223, and DPAK, offering flexibility for different design requirements.

  10. Are there any thermal considerations when using LD1117F33C?

    • Yes, LD1117F33C has thermal limitations that should be considered, especially when operating at high ambient temperatures or with high input-output differentials. Thermal management may be necessary in some applications.