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LD3985G47R
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LD3985G47R

Product Overview

Category

LD3985G47R belongs to the category of voltage regulators.

Use

It is commonly used to regulate and stabilize voltage in electronic circuits.

Characteristics

  • Low dropout voltage
  • High output voltage accuracy
  • Low quiescent current
  • Thermal shutdown protection
  • Short-circuit current limit

Package

LD3985G47R is available in a small surface-mount package, such as SOT-23 or TO-92.

Essence

The essence of LD3985G47R lies in its ability to provide stable and regulated voltage for various electronic devices.

Packaging/Quantity

Typically, LD3985G47R is packaged in reels or tubes, with quantities ranging from a few hundred to several thousand units per package.

Specifications

  • Input Voltage Range: 2.5V to 6V
  • Output Voltage: 4.7V
  • Dropout Voltage: 200mV (typical)
  • Quiescent Current: 50µA (typical)
  • Maximum Output Current: 150mA
  • Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

LD3985G47R has three pins:

  1. VIN: Input voltage pin
  2. GND: Ground pin
  3. VOUT: Output voltage pin

Functional Features

  • Voltage regulation: LD3985G47R ensures a stable output voltage regardless of input voltage fluctuations.
  • Low dropout voltage: It can operate efficiently even when the input voltage is close to the desired output voltage.
  • Thermal shutdown protection: The regulator automatically shuts down if the temperature exceeds a certain threshold, preventing damage to the device.
  • Short-circuit current limit: LD3985G47R limits the current in case of a short circuit, protecting the circuitry.

Advantages and Disadvantages

Advantages

  • High output voltage accuracy ensures precise voltage regulation.
  • Low quiescent current minimizes power consumption.
  • Small package size allows for easy integration into compact electronic designs.

Disadvantages

  • Limited maximum output current may not be suitable for high-power applications.
  • Dropout voltage of 200mV may affect efficiency in low input voltage scenarios.

Working Principles

LD3985G47R 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 pins. The internal circuitry compares the output voltage with a reference voltage and adjusts the pass transistor accordingly to maintain a stable output voltage.

Detailed Application Field Plans

LD3985G47R finds applications in various fields, including but not limited to: 1. Battery-powered devices: It can regulate voltage for portable electronics, such as smartphones, tablets, and wearable devices. 2. IoT devices: LD3985G47R is suitable for powering sensors, microcontrollers, and communication modules in IoT applications. 3. Automotive electronics: It can be used in automotive systems, such as infotainment systems, navigation devices, and engine control units.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to LD3985G47R are: 1. LM1117-4.7: A popular voltage regulator with a fixed 4.7V output voltage. 2. LT1763-4.7: Another voltage regulator with low dropout voltage and high output voltage accuracy. 3. MCP1702-4.7: A cost-effective option with a fixed 4.7V output voltage.

These alternative models provide comparable features and can be considered as substitutes for LD3985G47R in various applications.

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací LD3985G47R v technických řešeních

Sure! Here are 10 common questions and answers related to the application of LD3985G47R in technical solutions:

  1. Q: What is LD3985G47R? A: LD3985G47R is a voltage regulator IC (integrated circuit) commonly used in electronic circuits to regulate and stabilize voltage levels.

  2. Q: What is the input voltage range for LD3985G47R? A: The input voltage range for LD3985G47R is typically between 2.5V and 6V.

  3. Q: What is the output voltage of LD3985G47R? A: The output voltage of LD3985G47R is fixed at 4.7V.

  4. Q: What is the maximum output current LD3985G47R can handle? A: LD3985G47R can handle a maximum output current of 150mA.

  5. Q: Is LD3985G47R suitable for battery-powered applications? A: Yes, LD3985G47R is suitable for battery-powered applications as it has low quiescent current and operates efficiently with low dropout voltage.

  6. Q: Can LD3985G47R be used in automotive applications? A: Yes, LD3985G47R can be used in automotive applications as it is designed to withstand harsh environments and has built-in protection features.

  7. Q: Does LD3985G47R require any external components for operation? A: Yes, LD3985G47R requires a few external components such as input/output capacitors and resistors for stability and filtering purposes.

  8. Q: What is the thermal shutdown feature in LD3985G47R? A: The thermal shutdown feature in LD3985G47R protects the IC from overheating by shutting down the output when the temperature exceeds a certain threshold.

  9. Q: Can LD3985G47R be used in low-power microcontroller applications? A: Yes, LD3985G47R can be used in low-power microcontroller applications as it provides a stable and regulated voltage supply.

  10. Q: Is LD3985G47R available in different package options? A: Yes, LD3985G47R is available in various package options such as SOT-23, DFN, and TO-92, providing flexibility for different PCB layouts and space constraints.

Please note that the answers provided here are general and may vary depending on the specific datasheet and application requirements of LD3985G47R.