LT1521CST-3.3#TRPBF

Product Overview

Category

The LT1521CST-3.3#TRPBF belongs to the category of voltage regulators.

Use

This product is commonly used in electronic circuits to regulate and stabilize the output voltage.

Characteristics

• Voltage Regulation: The LT1521CST-3.3#TRPBF provides a regulated output voltage of 3.3 volts.
• Low Dropout: It has a low dropout voltage, allowing it to operate even when the input voltage is close to the desired output voltage.
• High Accuracy: This voltage regulator offers high accuracy in maintaining the output voltage within specified limits.
• Low Quiescent Current: It consumes very low quiescent current, making it suitable for battery-powered applications.
• Thermal Shutdown: The LT1521CST-3.3#TRPBF includes thermal shutdown protection to prevent damage due to excessive heat.

Package

This product comes in a small surface-mount package (SOT-223) that facilitates easy integration into circuit boards.

Essence

The LT1521CST-3.3#TRPBF is an essential component for achieving stable and reliable power supply in various electronic devices.

Packaging/Quantity

The LT1521CST-3.3#TRPBF is typically packaged in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

• Output Voltage: 3.3V
• Input Voltage Range: 2.5V to 20V
• Dropout Voltage: 300mV at 100mA
• Quiescent Current: 75µA
• Line Regulation: ±0.02%
• Load Regulation: ±0.05%
• Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

The LT1521CST-3.3#TRPBF has three pins:

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

Functional Features

• Voltage Regulation: The LT1521CST-3.3#TRPBF maintains a stable output voltage of 3.3V, regardless of input voltage fluctuations.
• Current Limiting: It incorporates current limiting circuitry to protect the device and the load from excessive current.
• Thermal Shutdown: The regulator includes thermal shutdown protection, which disables the device when the temperature exceeds a safe limit.
• Short-Circuit Protection: The LT1521CST-3.3#TRPBF is designed to withstand short-circuit conditions without damage.

Advantages and Disadvantages

Advantages

• High accuracy in voltage regulation.
• Low dropout voltage enables operation with low input-output voltage differentials.
• Low quiescent current consumption, suitable for battery-powered applications.
• Thermal shutdown protection prevents overheating.
• Small package size allows for easy integration into circuits.

Disadvantages

• Limited output current capability.
• Higher cost compared to some other voltage regulators.
• Requires external capacitors for stability.

Working Principles

The LT1521CST-3.3#TRPBF operates based on the principle of feedback control. It compares the output voltage with a reference voltage and adjusts the internal circuitry to maintain a constant output voltage of 3.3V. The device uses a combination of active and passive components to achieve this regulation.

Detailed Application Field Plans

The LT1521CST-3.3#TRPBF finds applications in various electronic systems, including but not limited to: - Battery-powered devices such as portable audio players and handheld instruments. - Embedded systems and microcontroller-based projects. - Automotive electronics, providing stable voltage to sensors and control circuits. - Industrial automation systems, where precise voltage regulation is crucial.

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to the LT1521CST-3.3#TRPBF include: - LM1117-3.3: A popular 3.3V voltage regulator with similar characteristics. - MCP1702-3302E: Another low dropout voltage regulator offering a regulated output of 3.3V. - TS2950CT-3.3: A cost-effective option for applications requiring a 3.3V output voltage.

These alternative models provide similar functionality and can be used as substitutes based on specific requirements and availability.

In conclusion, the LT1521CST-3.3#TRPBF is a voltage regulator with excellent voltage regulation, low dropout, and thermal shutdown protection. It finds applications in various electronic systems, providing stable power supply. While it has some limitations, there are alternative models available to suit different needs.