LK115D33-TR

Product Overview

Category: Electronic Component
Use: Voltage Regulator
Characteristics: High Efficiency, Low Dropout, Low Noise
Package: TO-252-3 (DPAK)
Essence: Linear Voltage Regulator
Packaging/Quantity: Tape & Reel / 2500 units per reel

Specifications

• Input Voltage Range: 4.5V to 18V
• Output Voltage: 3.3V
• Output Current: Up to 1.5A
• Dropout Voltage: 0.25V (typical)
• Line Regulation: ±0.2% (typical)
• Load Regulation: ±0.4% (typical)
• Quiescent Current: 75µA (typical)
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The LK115D33-TR voltage regulator has three pins:

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

Functional Features

• High efficiency with low dropout voltage.
• Low output noise for sensitive applications.
• Overcurrent and thermal protection.
• Fast transient response.
• Wide input voltage range.
• Reverse polarity protection.

Advantages and Disadvantages

Advantages: - High efficiency ensures minimal power dissipation. - Low dropout voltage allows operation with low input voltages. - Low output noise makes it suitable for noise-sensitive applications. - Overcurrent and thermal protection enhance reliability. - Fast transient response enables quick load regulation.

Disadvantages: - Limited output current capacity (up to 1.5A). - Not suitable for high-power applications. - Requires external capacitors for stability.

Working Principles

The LK115D33-TR is a linear voltage regulator that regulates the output voltage to a constant level, regardless of variations in the input voltage or load conditions. It achieves this by using a pass transistor and feedback circuitry. The pass transistor adjusts its resistance to maintain a stable output voltage based on the feedback received from the output.

Detailed Application Field Plans

The LK115D33-TR is commonly used in various electronic devices and systems, including:

1. Battery-powered devices: Provides a stable voltage supply for portable electronics.
2. Automotive applications: Regulates voltage for automotive sensors, lighting systems, and control modules.
3. Industrial equipment: Ensures consistent power supply for control circuits and sensors.
4. Communication systems: Used in routers, switches, and other network equipment.
5. Consumer electronics: Found in audio/video devices, set-top boxes, and gaming consoles.

Detailed and Complete Alternative Models

1. LM1117-3.3: Similar linear voltage regulator with comparable specifications.
2. LT1763-3.3: Low dropout linear regulator with higher output current capability.
3. TPS7A3301: Ultra-low noise linear regulator suitable for sensitive audio applications.
4. ADP3339: High accuracy linear regulator with adjustable output voltage.

These alternative models offer similar functionality and can be considered as replacements for the LK115D33-TR in various applications.

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