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LD3985J33R
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LD3985J33R

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Voltage Regulator
  • Characteristics: Low dropout, high accuracy, low quiescent current
  • Package: SOT-23
  • Essence: Regulates input voltage to a stable output voltage
  • Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

  • Input Voltage Range: 2.5V to 6.5V
  • Output Voltage: 3.3V
  • Dropout Voltage: 200mV at 150mA
  • Quiescent Current: 50µA
  • Load Regulation: ±0.1%
  • Line Regulation: ±0.05%
  • Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The LD3985J33R has three pins:

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

Functional Features

  • Low dropout voltage ensures efficient regulation even with small input-output voltage differentials.
  • High accuracy provides a stable output voltage for precise applications.
  • Low quiescent current minimizes power consumption in standby or idle modes.

Advantages

  • Small package size (SOT-23) allows for space-saving integration into compact electronic devices.
  • Wide input voltage range enables compatibility with various power sources.
  • Excellent load and line regulation ensure consistent performance under different operating conditions.

Disadvantages

  • Limited output current capability may not be suitable for high-power applications.
  • Higher cost compared to non-regulated voltage sources.

Working Principles

The LD3985J33R is a linear voltage regulator that uses a PNP pass transistor to regulate the output voltage. It operates by comparing the reference voltage with the feedback voltage from a resistive voltage divider connected to the output. The pass transistor adjusts its resistance to maintain a stable output voltage, compensating for changes in input voltage and load conditions.

Detailed Application Field Plans

The LD3985J33R is commonly used in various electronic devices that require a stable 3.3V power supply. Some typical applications include:

  1. Battery-powered devices: Portable audio players, handheld gaming consoles, and wireless communication devices.
  2. Microcontroller systems: Arduino boards, Raspberry Pi, and other development platforms.
  3. IoT devices: Sensors, actuators, and smart home automation systems.
  4. Automotive electronics: On-board diagnostics (OBD) modules, infotainment systems, and GPS trackers.

Detailed and Complete Alternative Models

  1. LM1117-3.3: Similar specifications and package type.
  2. MCP1700-3302E/TO: Low quiescent current alternative.
  3. TS2937CZ-3.3: Higher output current alternative.

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

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Noem 10 veelgestelde vragen en antwoorden met betrekking tot de toepassing van LD3985J33R in technische oplossingen

Sure! Here are 10 common questions and answers related to the application of LD3985J33R in technical solutions:

  1. Q: What is LD3985J33R? A: LD3985J33R is a low dropout (LDO) voltage regulator IC that provides a fixed output voltage of 3.3V.

  2. Q: What is the input voltage range for LD3985J33R? A: The input voltage range for LD3985J33R is typically between 2.5V and 6V.

  3. Q: What is the maximum output current LD3985J33R can handle? A: LD3985J33R can handle a maximum output current of 150mA.

  4. Q: Can LD3985J33R be used in battery-powered applications? A: Yes, LD3985J33R is suitable for battery-powered applications due to its low dropout voltage and low quiescent current.

  5. Q: Does LD3985J33R require any external components for operation? A: Yes, LD3985J33R requires a minimum of two external capacitors - an input capacitor and an output capacitor - for stable operation.

  6. Q: What is the dropout voltage of LD3985J33R? A: The dropout voltage of LD3985J33R is typically around 200mV at full load.

  7. Q: Is LD3985J33R protected against overcurrent and thermal shutdown? A: Yes, LD3985J33R has built-in protection features such as overcurrent protection and thermal shutdown to ensure safe operation.

  8. Q: Can LD3985J33R operate in a wide temperature range? A: Yes, LD3985J33R can operate in a temperature range of -40°C to +125°C.

  9. Q: What is the typical efficiency of LD3985J33R? A: The typical efficiency of LD3985J33R is around 85-90%, depending on the input and output voltage conditions.

  10. Q: Can LD3985J33R be used in automotive applications? A: Yes, LD3985J33R is suitable for automotive applications as it meets the necessary requirements such as AEC-Q100 qualification and high reliability standards.

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