LT1521CS8-3#PBF

Product Overview

Category

The LT1521CS8-3#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 accuracy
• Low quiescent current
• Thermal shutdown protection

Package

The LT1521CS8-3#PBF comes in an 8-pin surface mount package.

Essence

This product is essential for maintaining a stable and regulated voltage supply in various electronic devices.

Packaging/Quantity

The LT1521CS8-3#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: 3.0V
• Dropout Voltage: 0.4V at 100mA
• Quiescent Current: 75µA
• Line Regulation: ±0.02%
• Load Regulation: ±0.04%
• Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

The LT1521CS8-3#PBF has the following pin configuration:

1. GND (Ground)
2. IN (Input Voltage)
3. ADJ (Adjustment Pin)
4. NC (No Connection)
5. NC (No Connection)
6. NC (No Connection)
7. NC (No Connection)
8. OUT (Output Voltage)

Functional Features

• Low dropout voltage ensures efficient regulation even when the input voltage is close to the desired output voltage.
• High output accuracy provides precise voltage regulation for sensitive electronic components.
• Low quiescent current minimizes power consumption when the load is light.
• Thermal shutdown protection prevents damage due to excessive temperature.

Advantages and Disadvantages

Advantages

• High output accuracy ensures reliable voltage regulation.
• Low dropout voltage allows for efficient operation even with low input voltages.
• Thermal shutdown protection safeguards the device from overheating.

Disadvantages

• Limited output voltage options (fixed at 3.0V).
• Not suitable for applications requiring adjustable output voltage.

Working Principles

The LT1521CS8-3#PBF operates based on a linear regulator architecture. It uses a feedback mechanism to compare the output voltage with a reference voltage and adjusts the internal circuitry to maintain a stable output voltage. The dropout voltage is minimized by utilizing a pass transistor that operates in its active region, allowing for efficient regulation even when the input voltage is close to the desired output voltage.

Detailed Application Field Plans

The LT1521CS8-3#PBF finds application in various electronic devices and systems, including:

1. Battery-powered devices: Provides regulated voltage for microcontrollers, sensors, and other components in portable electronics.
2. Automotive electronics: Ensures stable voltage supply for automotive control units, infotainment systems, and lighting modules.
3. Industrial automation: Used in PLCs (Programmable Logic Controllers), motor drives, and power supplies to maintain consistent voltage levels.
4. Communication systems: Regulates voltage in routers, switches, and wireless access points to ensure reliable network connectivity.
5. Medical devices: Provides precise voltage regulation in medical equipment such as patient monitors, infusion pumps, and diagnostic devices.

Detailed and Complete Alternative Models

1. LM317T: Adjustable voltage regulator with a wide input voltage range and high output current capability.
2. LM1117-3.3: Fixed 3.3V voltage regulator with low dropout voltage and thermal shutdown protection.
3. LT1086CT-3.3: Adjustable voltage regulator with low dropout voltage and high output current capability.

These alternative models offer similar functionality and can be considered as substitutes for the LT1521CS8-3#PBF in various applications.

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