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Product Overview: Texas Instruments LP2985-33DBVR

Introduction

The Texas Instruments LP2985-33DBVR is a low-dropout (LDO) voltage regulator specifically designed to provide a stable and efficient 3.3V output with low quiescent current. This component is widely used in a variety of electronic systems where power efficiency and stable voltage regulation are essential. Known for its low noise performance and high accuracy, the LP2985-33DBVR is frequently used in battery-powered devices, portable applications, and sensitive analog circuitry.

In this article, we will explore the LP2985-33DBVR in detail, including its product description, features, detailed specifications, typical applications, a guide to decoding its part number, and answers to frequently asked questions (FAQs). Additionally, we’ll introduce Texas Instruments as the manufacturer and conclude with a final summary on the LP2985-33DBVR.

Product Description

The LP2985-33DBVR is part of the LP2985 series of LDO voltage regulators from Texas Instruments. This specific model is designed to deliver a 3.3V output with a maximum output current of 150mA. As an LDO regulator, it features low dropout voltage, meaning it can regulate voltage even when the difference between the input and output voltages is small. The device operates with a low quiescent current, making it highly suitable for battery-powered applications where power conservation is crucial.

One of the primary benefits of the LP2985-33DBVR is its ability to provide a clean and stable voltage output with low output noise, which makes it ideal for sensitive analog circuits and communication systems. Additionally, the device includes features such as short-circuit protection, thermal shutdown, and current limiting, ensuring reliable and safe operation in a variety of applications.

Key Features

The LP2985-33DBVR is packed with features that make it an excellent choice for voltage regulation in both low-power and performance-sensitive applications. Some of its key features include:

  1. Low Dropout Voltage: The device can maintain regulation with a minimal difference between input and output voltage, reducing power loss.
  2. Low Quiescent Current: Typically draws only 75μA of quiescent current, which extends battery life in portable devices.
  3. High Output Accuracy: Delivers a highly accurate 3.3V output with a tolerance of ±1.5% over temperature and input voltage variations.
  4. Low Output Noise: Offers very low output noise (30μVRMS), making it ideal for powering noise-sensitive analog and RF circuits.
  5. High Power Supply Rejection Ratio (PSRR): Ensures stable output even in environments with noisy or unstable power supplies.
  6. Current Limiting and Thermal Shutdown: Built-in safety features that protect the device and connected circuits from damage due to overcurrent or excessive heat.
  7. Stable with Ceramic Capacitors: The LP2985-33DBVR is designed to be stable with ceramic capacitors, making it easier to implement in compact designs.
  8. Wide Input Voltage Range: Supports input voltages ranging from 2.5V to 16V, providing flexibility in system design.
  9. Compact SOT-23 Package: Comes in a small SOT-23-5 package, which is ideal for space-constrained designs.
  10. Output Capacitor Range: The output can be stabilized with a small output capacitor as low as 1µF, reducing the overall component footprint.

Detailed Specifications

Here’s a detailed look at the LP2985-33DBVR’s key specifications:

ParameterSpecification
Output Voltage3.3V
Input Voltage Range2.5V to 16V
Output Current150mA (max)
Dropout Voltage280mV at 150mA load
Quiescent Current75µA (typical)
Output Voltage Accuracy±1.5%
Output Noise30μVRMS (10Hz to 100kHz)
PSRR70dB at 1kHz
Line Regulation0.04%/V (typical)
Load Regulation0.1% (typical)
Thermal Shutdown ProtectionYes
Short-Circuit ProtectionYes
Output Capacitor Range1µF to 10µF
PackageSOT-23-5
Operating Temperature Range-40°C to 125°C

These specifications highlight the LP2985-33DBVR’s suitability for applications that require precise voltage regulation and low power consumption.

Applications

The LP2985-33DBVR is well-suited for a wide range of applications that require a stable 3.3V regulated output. Below are some typical use cases:

  1. Portable Devices: Used in smartphones, tablets, and wearables where low power consumption is critical for battery life extension.
  2. Battery-Powered Systems: Ideal for systems powered by batteries such as remote sensors, wireless communication devices, and handheld equipment.
  3. Sensitive Analog Circuits: Provides low noise and stable power to sensitive analog circuits such as audio systems, RF modules, and ADCs.
  4. Microcontrollers: Powers microcontroller units (MCUs) and ensures a reliable voltage supply for stable operation.
  5. Communication Systems: Suitable for low-noise voltage regulation in wireless communication and RF systems.
  6. Industrial Electronics: Used in industrial control systems that require reliable and accurate voltage regulation.
  7. Medical Devices: Powers low-power medical devices, ensuring stable voltage for sensors and monitoring equipment.
  8. Automotive Systems: Implemented in automotive electronics for low-power voltage regulation in infotainment systems, sensors, and control units.
  9. IoT Devices: Provides a stable voltage source for sensors, actuators, and communication modules in Internet of Things (IoT) devices.
  10. Consumer Electronics: Used in home automation devices, audio systems, and other consumer electronics that require low-power voltage regulation.

Decoding the Part Number

The part number LP2985-33DBVR follows a specific naming convention that gives insight into the component's characteristics:

  • LP2985: This refers to the family of LDO voltage regulators, known for low dropout and low quiescent current.
  • 33: This indicates the output voltage of 3.3V.
  • DBV: This denotes the package type, which in this case is a SOT-23-5 (Small Outline Transistor, 5-pin) package.
  • R: This indicates the tape and reel packaging, which is commonly used for automated assembly in high-volume production.

Manufacturer Overview: Texas Instruments

Texas Instruments (TI) is a leading global semiconductor company known for its innovation and high-quality products in the analog and embedded processing industries. With a portfolio that spans microcontrollers, power management devices, signal processors, and more, TI's products are found in a wide array of applications, from automotive systems to industrial automation and consumer electronics.

TI is renowned for its commitment to delivering highly reliable and efficient components, as well as providing strong technical support and design resources to help engineers and developers optimize their designs. As a pioneer in power management solutions, Texas Instruments continues to lead the industry with products like the LP2985-33DBVR, which meet the demands of modern electronic systems for efficient and precise voltage regulation.

Frequently Asked Questions (FAQs)

1. What is the output voltage of the LP2985-33DBVR?
The LP2985-33DBVR provides a fixed 3.3V output.

2. Can the LP2985-33DBVR operate with a low input voltage?
Yes, the LP2985-33DBVR can operate with input voltages as low as 2.5V.

3. What is the maximum output current of the LP2985-33DBVR?
The maximum output current is 150mA.

4. Is the LP2985-33DBVR suitable for battery-powered applications?
Yes, it is highly suitable for battery-powered applications due to its low quiescent current of just 75µA.

5. Does the LP2985-33DBVR have thermal protection?
Yes, it has built-in thermal shutdown protection to prevent overheating.

6. What package type does the LP2985-33DBVR come in?
The device comes in a compact SOT-23-5 package, ideal for space-constrained applications.

7. What is the dropout voltage of the LP2985-33DBVR?
The dropout voltage is 280mV at a 150mA load.

8. Is the LP2985-33DBVR suitable for noise-sensitive applications?
Yes, with an output noise of just 30μVRMS, it is ideal for noise-sensitive applications like RF and audio systems.

9. Can the LP2985-33DBVR be used with ceramic capacitors?
Yes, it is stable with ceramic capacitors, making it versatile for various designs.

10. Does the LP2985-33DBVR provide overcurrent protection?
Yes, the device includes current limiting to protect against overcurrent conditions.

Conclusion

The Texas Instruments LP2985-33DBVR is a versatile and efficient low-dropout voltage regulator that provides reliable 3.3V power output for a variety of applications. With its low quiescent current, low dropout voltage, and integrated safety features, it is an ideal choice for portable and battery-powered devices, as well as noise-sensitive circuits. Its small form factor and compatibility with ceramic capacitors make it easy to integrate into compact designs.

Texas Instruments continues to deliver high-quality power management solutions, and the LP2985-33DBVR exemplifies their commitment to efficiency, reliability, and performance in modern electronic systems. Whether you are designing a communication system, a battery-powered sensor, or an industrial control unit, the LP2985-33DBVR is a dependable solution for your voltage regulation needs.


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