STMicroelectronics
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LDS3985PU28R
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LDS3985PU28R

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Voltage Regulator
  • Characteristics:
    • High efficiency
    • Low dropout voltage
    • Adjustable output voltage
    • Overcurrent protection
    • Thermal shutdown protection
  • Package: TO-220
  • Essence: Voltage regulation for electronic devices
  • Packaging/Quantity: Tape and Reel, 1000 units per reel

Specifications

  • Input Voltage Range: 2.7V to 28V
  • Output Voltage Range: 1.25V to 26V
  • Output Current: Up to 1.5A
  • Dropout Voltage: 300mV at 1A
  • Quiescent Current: 75µA
  • Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The LDS3985PU28R has the following pin configuration:

  1. VIN (Input Voltage)
  2. GND (Ground)
  3. VOUT (Output Voltage)

Functional Features

  • High Efficiency: The LDS3985PU28R offers high efficiency, minimizing power loss during voltage regulation.
  • Low Dropout Voltage: With a low dropout voltage of only 300mV at 1A, the regulator can maintain a stable output even when the input voltage is close to the desired output voltage.
  • Adjustable Output Voltage: The output voltage can be adjusted within the range of 1.25V to 26V, providing flexibility for various applications.
  • Overcurrent Protection: The IC incorporates overcurrent protection, safeguarding the connected circuitry from excessive current flow.
  • Thermal Shutdown Protection: In case of excessive temperature rise, the regulator automatically shuts down to prevent damage.

Advantages and Disadvantages

Advantages: - High efficiency - Low dropout voltage - Adjustable output voltage - Overcurrent and thermal protection

Disadvantages: - Limited maximum output current (1.5A)

Working Principles

The LDS3985PU28R 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 LDS3985PU28R finds applications in various electronic devices requiring voltage regulation. Some potential application fields include:

  1. Mobile Devices: Powering the core components such as microcontrollers, sensors, and wireless modules.
  2. Automotive Electronics: Providing stable voltage for automotive control systems, infotainment systems, and lighting modules.
  3. Industrial Equipment: Regulating voltage for motor drives, control circuits, and communication modules.
  4. Consumer Electronics: Powering audio/video equipment, gaming consoles, and home automation systems.

Detailed and Complete Alternative Models

  1. LM1117-ADJ: Adjustable voltage regulator with similar specifications.
  2. LT1084CP-5: Fixed 5V voltage regulator capable of higher output current.
  3. TPS7A4700: Ultra-low noise voltage regulator suitable for sensitive audio applications.

(Note: This list is not exhaustive and other alternative models may exist.)

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Noem 10 veelgestelde vragen en antwoorden met betrekking tot de toepassing van LDS3985PU28R in technische oplossingen

Sure! Here are 10 common questions and answers related to the application of LDS3985PU28R in technical solutions:

  1. Q: What is LDS3985PU28R? A: LDS3985PU28R is a specific model of power management integrated circuit (PMIC) commonly used in various technical solutions.

  2. Q: What are the key features of LDS3985PU28R? A: The key features of LDS3985PU28R include high efficiency, low quiescent current, wide input voltage range, and multiple protection mechanisms.

  3. Q: What is the typical application of LDS3985PU28R? A: LDS3985PU28R is often used in battery-powered devices, such as smartphones, tablets, portable medical devices, and IoT devices.

  4. Q: What is the input voltage range supported by LDS3985PU28R? A: LDS3985PU28R typically supports an input voltage range of 2.7V to 5.5V.

  5. Q: What is the output voltage range provided by LDS3985PU28R? A: LDS3985PU28R provides a fixed output voltage of 2.8V.

  6. Q: Can LDS3985PU28R handle high current loads? A: Yes, LDS3985PU28R has a maximum output current capability of up to 500mA, making it suitable for many low to moderate power applications.

  7. Q: Does LDS3985PU28R have any built-in protection features? A: Yes, LDS3985PU28R includes protection features like over-temperature protection, short-circuit protection, and under-voltage lockout.

  8. Q: Is LDS3985PU28R compatible with different types of batteries? A: Yes, LDS3985PU28R is compatible with various battery chemistries, including lithium-ion (Li-ion), lithium-polymer (LiPo), and lithium iron phosphate (LiFePO4).

  9. Q: Can LDS3985PU28R be used in automotive applications? A: No, LDS3985PU28R is not specifically designed for automotive applications and may not meet the required automotive standards.

  10. Q: Are there any recommended external components to use with LDS3985PU28R? A: Yes, it is recommended to use input and output capacitors to ensure stability and reduce noise in the power supply circuit when using LDS3985PU28R.

Please note that the answers provided here are general and may vary depending on specific design requirements and application scenarios.