LT1521IST-3#PBF

Product Overview

Category

The LT1521IST-3#PBF belongs to the category of voltage regulators.

Use

It is primarily used for regulating voltage in electronic circuits.

Characteristics

• Low dropout voltage
• High output voltage accuracy
• Low quiescent current
• Thermal shutdown protection

Package

The LT1521IST-3#PBF comes in a small SOT-223 package.

Essence

The essence of this product is its ability to provide stable and regulated voltage output.

Packaging/Quantity

The LT1521IST-3#PBF is typically packaged in reels or tubes, with a quantity of 250 units per reel/tube.

Specifications

• Input Voltage Range: 2.5V to 20V
• Output Voltage Range: 1.25V to 15V
• Dropout Voltage: 0.4V at 150mA
• Output Current: Up to 150mA
• Quiescent Current: 75µA
• Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

The LT1521IST-3#PBF has three pins:

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

Functional Features

• Low dropout voltage ensures efficient regulation even with low input-output voltage differentials.
• High output voltage accuracy provides precise voltage regulation.
• Low quiescent current minimizes power consumption when the load is light.
• Thermal shutdown protection prevents damage due to excessive temperature.

Advantages

• Wide input voltage range allows for versatile applications.
• Small package size enables space-saving designs.
• Excellent line and load regulation characteristics ensure stable performance.
• Low dropout voltage reduces power dissipation and extends battery life.

Disadvantages

• Limited output current capability may not be suitable for high-power applications.
• SOT-223 package may require additional heat sinking for certain operating conditions.

Working Principles

The LT1521IST-3#PBF operates as a linear voltage regulator. It uses a reference voltage and feedback mechanism to maintain a stable output voltage regardless of changes in the input voltage or load conditions. The internal circuitry adjusts the pass transistor to regulate the output voltage within the specified range.

Detailed Application Field Plans

The LT1521IST-3#PBF finds applications in various fields, including:

1. Portable electronic devices: Provides regulated voltage for microcontrollers, sensors, and other components.
2. Automotive electronics: Ensures stable voltage supply for automotive control systems and infotainment devices.
3. Industrial equipment: Used in power supplies for industrial automation, instrumentation, and control systems.
4. Communication systems: Provides voltage regulation for wireless communication modules, routers, and network equipment.

Detailed and Complete Alternative Models

1. LM317: A popular general-purpose voltage regulator with adjustable output voltage.
2. LT1084: A high-current, low-dropout voltage regulator suitable for demanding applications.
3. LM1117: A low dropout voltage regulator available in various fixed output voltages.

These alternative models offer similar functionality and can be considered based on specific requirements.

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