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LD2985AM31R
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LD2985AM31R

Product Overview

  • Category: Integrated Circuit
  • Use: Voltage Regulator
  • Characteristics: Low Dropout, Low Noise, High PSRR
  • Package: SOT-23
  • Essence: Linear Voltage Regulator
  • Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

  • Input Voltage Range: 2.5V to 16V
  • Output Voltage: 3.1V
  • Output Current: 150mA
  • Dropout Voltage: 300mV @ 100mA
  • Quiescent Current: 75µA
  • Line Regulation: 0.04%/V
  • Load Regulation: 0.15%
  • Ripple Rejection Ratio: 70dB
  • Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The LD2985AM31R has three pins:

  1. VIN (Pin 1): Input voltage pin.
  2. GND (Pin 2): Ground reference pin.
  3. VOUT (Pin 3): Output voltage pin.

Functional Features

  • Low dropout voltage allows for efficient regulation even with small input-output voltage differentials.
  • Low noise output ensures stable and clean power supply for sensitive applications.
  • High Power Supply Rejection Ratio (PSRR) minimizes the impact of input voltage fluctuations on the output.
  • Thermal shutdown and current limit protection features enhance device reliability.

Advantages and Disadvantages

Advantages: - Low dropout voltage enables efficient regulation. - Low noise output suitable for noise-sensitive applications. - High PSRR reduces the impact of input voltage variations. - Compact SOT-23 package facilitates space-constrained designs.

Disadvantages: - Limited output current capability (150mA). - Relatively high quiescent current compared to some alternatives. - Narrow input voltage range (2.5V to 16V).

Working Principles

The LD2985AM31R is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It operates by comparing the reference voltage with a fraction of the output voltage, adjusting the pass transistor's resistance to maintain a stable output voltage.

Detailed Application Field Plans

The LD2985AM31R is suitable for various applications, including but not limited to: - Battery-powered devices - Portable electronics - Communication systems - Industrial control systems - Automotive electronics

Detailed and Complete Alternative Models

  1. LD2985BM33R: Output Voltage - 3.3V, Output Current - 150mA.
  2. LD2985BM25R: Output Voltage - 2.5V, Output Current - 150mA.
  3. LD2985BM18R: Output Voltage - 1.8V, Output Current - 150mA.
  4. LD2985BM12R: Output Voltage - 1.2V, Output Current - 150mA.

These alternative models offer different output voltages while sharing similar characteristics and package options.

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací LD2985AM31R v technických řešeních

Sure! Here are 10 common questions and answers related to the application of LD2985AM31R in technical solutions:

  1. Q: What is LD2985AM31R? A: LD2985AM31R is a low-dropout voltage regulator IC that provides a fixed output voltage of 3.1V.

  2. Q: What is the input voltage range for LD2985AM31R? A: The input voltage range for LD2985AM31R is typically between 2.5V and 16V.

  3. Q: What is the maximum output current of LD2985AM31R? A: LD2985AM31R can provide a maximum output current of 150mA.

  4. Q: Can LD2985AM31R be used in battery-powered applications? A: Yes, LD2985AM31R is suitable for battery-powered applications due to its low dropout voltage and low quiescent current.

  5. Q: Does LD2985AM31R require any external components for operation? A: Yes, LD2985AM31R requires an input capacitor and an output capacitor for stability and proper operation.

  6. Q: What is the dropout voltage of LD2985AM31R? A: The dropout voltage of LD2985AM31R is typically around 300mV at full load.

  7. Q: Can LD2985AM31R handle overcurrent or thermal protection? A: Yes, LD2985AM31R has built-in overcurrent and thermal protection features to ensure safe operation.

  8. Q: Is LD2985AM31R suitable for noise-sensitive applications? A: Yes, LD2985AM31R has excellent ripple rejection characteristics, making it suitable for noise-sensitive applications.

  9. Q: Can LD2985AM31R be used in automotive applications? A: Yes, LD2985AM31R is designed to meet the requirements of automotive applications and can operate in a wide temperature range.

  10. Q: What package options are available for LD2985AM31R? A: LD2985AM31R is available in various package options, including SOT-23, DPAK, and TO-92.

Please note that these answers are general and may vary depending on the specific datasheet and application requirements.