MIC29501-3.3BU

Product Overview

Category

MIC29501-3.3BU belongs to the category of voltage regulators.

Use

It is primarily used to regulate and stabilize voltage in electronic circuits.

Characteristics

• Input Voltage Range: 4.75V to 26V
• Output Voltage: 3.3V
• Maximum Output Current: 5A
• Dropout Voltage: 450mV
• Low Quiescent Current: 120µA
• Thermal Shutdown Protection
• Short Circuit Current Limiting
• Adjustable Output Voltage

Package

MIC29501-3.3BU comes in a TO-263 package, also known as D2PAK or DDPAK.

Essence

The essence of MIC29501-3.3BU is its ability to provide a stable and regulated output voltage of 3.3V from a wide range of input voltages.

Packaging/Quantity

This product is typically packaged in reels or tubes, with a quantity of 1000 units per reel/tube.

Specifications

• Input Voltage Range: 4.75V to 26V
• Output Voltage: 3.3V ±2%
• Maximum Output Current: 5A
• Dropout Voltage: 450mV (at 1A)
• Quiescent Current: 120µA
• Line Regulation: 0.02%/V
• Load Regulation: 0.04%/A
• Ripple Rejection: 70dB
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

MIC29501-3.3BU has the following pin configuration:

1. VIN (Input Voltage)
2. GND (Ground)
3. VOUT (Output Voltage)

Functional Features

• Voltage Regulation: The MIC29501-3.3BU provides a stable output voltage of 3.3V, regardless of variations in the input voltage.
• Thermal Shutdown Protection: It incorporates a thermal shutdown feature that protects the device from overheating.
• Short Circuit Current Limiting: The regulator limits the output current in case of a short circuit, preventing damage to the circuit.
• Adjustable Output Voltage: The output voltage can be adjusted using external resistors, allowing flexibility in system design.

Advantages and Disadvantages

Advantages

• Wide input voltage range allows compatibility with various power sources.
• High output current capability of 5A enables it to power multiple components simultaneously.
• Low quiescent current minimizes power consumption when the load is light.
• Thermal shutdown protection ensures safe operation even under high temperature conditions.
• Short circuit current limiting protects the circuit from damage.

Disadvantages

• Dropout voltage of 450mV may limit its use in low voltage applications.
• TO-263 package may require additional space on the PCB compared to smaller packages.

Working Principles

MIC29501-3.3BU is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It compares the output voltage with a reference voltage and adjusts the pass transistor accordingly to maintain a constant output voltage. The regulator operates in a continuous mode, continuously adjusting the pass transistor to compensate for changes in the input voltage and load conditions.

Detailed Application Field Plans

MIC29501-3.3BU finds applications in various electronic systems where a stable and regulated 3.3V power supply is required. Some common application fields include:

1. Microcontroller Systems: Provides a reliable power source for microcontrollers, ensuring proper operation.
2. Communication Equipment: Used to regulate voltage in communication devices such as routers, modems, and wireless access points.
3. Industrial Control Systems: Ensures stable power supply for control systems used in industrial automation.
4. Automotive Electronics: Used in automotive applications to regulate voltage for various electronic components.
5. Power Management Systems: Integrated into power management systems to provide regulated voltage for different subsystems.

Detailed and Complete Alternative Models

1. LM1117-3.3: A popular alternative with similar specifications and pin configuration.
2. LT1086-3.3: Offers adjustable output voltage and higher maximum output current.
3. TPS7A3301: Provides ultra-low dropout voltage and high PSRR for noise-sensitive applications.

These alternative models offer similar functionality and can be considered as substitutes for MIC29501-3.3BU depending on specific requirements.

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