LT1963ET#30PBF

Product Overview

• Category: Voltage Regulator
• Use: Power management
• Characteristics: Low dropout, high current, adjustable voltage regulator
• Package: TO-220
• Essence: Linear Technology voltage regulator
• Packaging/Quantity: Tape & Reel, 1000 pieces per reel

Specifications

• Input Voltage Range: 1.8V to 20V
• Output Voltage Range: 1.21V to 19.5V
• Dropout Voltage: 300mV (typical)
• Output Current: Up to 1.5A
• Line Regulation: 0.015% (typical)
• Load Regulation: 0.04% (typical)
• Quiescent Current: 1.5mA (typical)
• Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

The LT1963ET#30PBF has three pins:

1. VIN - Input voltage pin
2. GND - Ground pin
3. VOUT - Output voltage pin

Functional Features

• Low dropout voltage: The LT1963ET#30PBF can regulate the output voltage even when the input voltage is close to the desired output voltage.
• High current capability: It can provide up to 1.5A of output current, making it suitable for power-hungry applications.
• Adjustable output voltage: The output voltage can be adjusted within a wide range using external resistors.
• Excellent line and load regulation: Ensures stable output voltage under varying input voltage and load conditions.
• Thermal shutdown and current limit protection: Protects the device from excessive heat and current.

Advantages and Disadvantages

Advantages

• Low dropout voltage allows for efficient regulation even with small input-output voltage differentials.
• High current capability makes it suitable for a wide range of applications.
• Adjustable output voltage provides flexibility in design.
• Excellent line and load regulation ensures stable performance.
• Thermal shutdown and current limit protection enhance device reliability.

Disadvantages

• The TO-220 package may require additional space on the PCB compared to smaller packages.
• Higher quiescent current compared to some other voltage regulators may impact power efficiency in low-power applications.

Working Principles

The LT1963ET#30PBF is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It operates by comparing the reference voltage with a fraction of the output voltage, adjusting the pass transistor accordingly to maintain a stable output voltage. The dropout voltage is minimized by using a PNP pass transistor and a PMOS feedback transistor.

Detailed Application Field Plans

The LT1963ET#30PBF can be used in various applications, including:

1. Power supplies for microcontrollers and digital circuits
2. Battery-powered devices requiring regulated voltages
3. Automotive electronics
4. Industrial control systems
5. Audio amplifiers
6. LED lighting systems

Detailed and Complete Alternative Models

1. LM1117-3.3: A popular alternative with similar specifications and adjustable output voltage.
2. LT1084CT-3.3: Offers higher output current capability and lower dropout voltage.
3. LM317T: A versatile voltage regulator with adjustable output voltage and high ripple rejection.

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

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