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LP3905SDX-A3
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LP3905SDX-A3

Product Overview

Category

The LP3905SDX-A3 belongs to the category of voltage regulators.

Use

It is used to regulate voltage in electronic devices, ensuring stable and reliable power supply.

Characteristics

  • Input Voltage Range: 2.7V to 5.5V
  • Output Voltage Range: 0.8V to 3.3V
  • Low Dropout Voltage: 200mV at 150mA
  • Ultra-Low Noise: 30µVRMS (10Hz to 100kHz)
  • Package: WSON-6 package
  • Essence: Efficient voltage regulation for electronic devices
  • Packaging/Quantity: Available in reels with a quantity of 3000 units per reel

Specifications

  • Input Voltage Range: 2.7V to 5.5V
  • Output Voltage Range: 0.8V to 3.3V
  • Dropout Voltage: 200mV at 150mA
  • Noise: 30µVRMS (10Hz to 100kHz)
  • Package: WSON-6
  • Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

  1. VIN: Input Voltage
  2. GND: Ground
  3. EN: Enable
  4. NC: No Connection
  5. VOUT: Output Voltage
  6. PG: Power Good Indicator

Functional Features

  • Low dropout voltage
  • Ultra-low noise
  • Power good indicator
  • Thermal shutdown protection
  • Short-circuit protection

Advantages and Disadvantages

Advantages

  • Wide input voltage range
  • Low dropout voltage
  • Ultra-low noise
  • Small package size

Disadvantages

  • Limited output current capacity
  • Higher cost compared to traditional linear regulators

Working Principles

The LP3905SDX-A3 utilizes a feedback control loop to maintain a stable output voltage despite variations in the input voltage and load conditions. It employs internal circuitry to provide protection features such as thermal shutdown and short-circuit protection.

Detailed Application Field Plans

The LP3905SDX-A3 is suitable for various portable and battery-powered applications, including smartphones, tablets, portable media players, and handheld gaming devices. Its low dropout voltage and ultra-low noise make it ideal for powering sensitive analog and digital circuits in these devices.

Detailed and Complete Alternative Models

  • LP5907: Similar voltage regulator with higher output current capability
  • LM2937: Linear voltage regulator with comparable specifications
  • TPS799: Low-dropout regulator with different package options

This comprehensive entry provides an in-depth understanding of the LP3905SDX-A3, covering its basic information, specifications, pin configuration, functional features, advantages and disadvantages, working principles, application field plans, and alternative models.

Word Count: 410

Listen Sie 10 häufige Fragen und Antworten im Zusammenhang mit der Anwendung von LP3905SDX-A3 in technischen Lösungen auf

  1. What is the LP3905SDX-A3?

    • The LP3905SDX-A3 is a high-efficiency, multi-channel step-down converter designed for applications in portable devices such as smartphones and tablets.

  2. What is the input voltage range of the LP3905SDX-A3?

    • The input voltage range of the LP3905SDX-A3 is typically 2.7V to 5.5V.

  3. What are the output channels of the LP3905SDX-A3?

    • The LP3905SDX-A3 has three synchronous buck converters with integrated FETs, providing multiple output channels.

  4. What is the maximum output current of each channel?

    • Each channel of the LP3905SDX-A3 can deliver up to 800mA of output current.

  5. What is the switching frequency of the LP3905SDX-A3?

    • The LP3905SDX-A3 operates at a fixed frequency of 3MHz, which helps minimize the size of external components.

  6. Does the LP3905SDX-A3 have built-in protection features?

    • Yes, the LP3905SDX-A3 includes overcurrent protection, thermal shutdown, and undervoltage lockout to ensure safe operation.

  7. Can the LP3905SDX-A3 be used in battery-powered applications?

    • Yes, the LP3905SDX-A3 is well-suited for battery-powered applications due to its high efficiency and low quiescent current.

  8. What control interfaces does the LP3905SDX-A3 support?

    • The LP3905SDX-A3 supports both I2C and SPI control interfaces, offering flexibility in system integration.

  9. Is the LP3905SDX-A3 suitable for space-constrained designs?

    • Yes, the LP3905SDX-A3 comes in a compact package and requires minimal external components, making it suitable for space-constrained designs.

  10. What are some typical applications of the LP3905SDX-A3?

    • Typical applications of the LP3905SDX-A3 include powering the core, memory, and I/O voltages in portable electronic devices, as well as other power management solutions in consumer electronics.