BU33TD3WG-TR

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

Characteristics: - High efficiency - Low dropout voltage - Wide input voltage range - Overcurrent protection - Thermal shutdown protection

Package: TO-252-5L (DPAK)

Essence: The BU33TD3WG-TR is a voltage regulator IC designed to provide a stable output voltage from a varying input voltage source.

Packaging/Quantity: The BU33TD3WG-TR is available in tape and reel packaging, with 2,500 units per reel.

Specifications

• Input Voltage Range: 4.5V - 28V
• Output Voltage Range: 1.2V - 26V
• Output Current: Up to 3A
• Dropout Voltage: 0.25V @ 1A
• Quiescent Current: 100μA
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The BU33TD3WG-TR has the following pin configuration:

1. VIN: Input voltage pin
2. GND: Ground pin
3. EN: Enable pin
4. NC: No connection
5. VOUT: Output voltage pin

Functional Features

• High Efficiency: The BU33TD3WG-TR utilizes advanced circuitry to achieve high efficiency, minimizing power loss during voltage regulation.
• Low Dropout Voltage: With a low dropout voltage of only 0.25V at 1A load, the IC can maintain a stable output voltage even when the input voltage is close to the desired output voltage.
• Wide Input Voltage Range: The IC can accept input voltages ranging from 4.5V to 28V, making it suitable for a wide range of applications.
• Overcurrent Protection: The BU33TD3WG-TR incorporates overcurrent protection, which safeguards the IC and connected components from excessive current flow.
• Thermal Shutdown Protection: To prevent overheating, the IC features thermal shutdown protection, automatically shutting down the device if the temperature exceeds a safe threshold.

Advantages and Disadvantages

Advantages: - High efficiency - Wide input voltage range - Overcurrent and thermal protection - Low dropout voltage

Disadvantages: - Limited output current capacity (up to 3A)

Working Principles

The BU33TD3WG-TR operates based on a linear voltage regulation principle. It uses an internal reference voltage and feedback mechanism to maintain a stable output voltage regardless of variations in the input voltage. The IC adjusts its internal circuitry to provide the desired output voltage while minimizing power loss.

Detailed Application Field Plans

The BU33TD3WG-TR is commonly used in various electronic devices and systems that require a stable and regulated power supply. Some application fields include:

1. Consumer Electronics:

   • Smartphones
   • Tablets
   • Portable audio players

2. Automotive Electronics:

   • Infotainment systems
   • GPS navigation devices
   • On-board diagnostic systems

3. Industrial Equipment:

   • Factory automation systems
   • Power distribution units
   • Test and measurement instruments

4. Communication Systems:

   • Routers
   • Switches
   • Wireless access points

Detailed and Complete Alternative Models

1. LM1117-3.3: A popular alternative with similar specifications and package type.
2. TPS7A4700: Offers higher output current capability and lower dropout voltage.
3. LT1086: Provides adjustable output voltage and higher input voltage range.

These alternative models offer similar functionality and can be considered as substitutes for the BU33TD3WG-TR in various applications.

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