MIC2937A-3.3BU TR

Overview

Product Category

The MIC2937A-3.3BU TR belongs to the category of voltage regulators.

Use

This product is used to regulate and stabilize voltage levels in electronic circuits.

Characteristics

• Voltage regulation: The MIC2937A-3.3BU TR provides a regulated output voltage of 3.3V.
• High current capability: It can handle high currents up to 1.5A.
• Low dropout voltage: The dropout voltage is as low as 0.6V, minimizing power dissipation.
• Thermal shutdown protection: The regulator includes thermal shutdown circuitry to prevent damage due to excessive heat.
• Short-circuit protection: It has built-in short-circuit protection to safeguard against overcurrent conditions.

Package

The MIC2937A-3.3BU TR comes in a TO-263 package, also known as D2PAK or DDPAK. This package offers good thermal performance and ease of mounting on a printed circuit board (PCB).

Essence

The essence of the MIC2937A-3.3BU TR is its ability to provide a stable and regulated output voltage of 3.3V with high current capability, low dropout voltage, and built-in protection features.

Packaging/Quantity

The product is typically packaged in reels or tubes for automated assembly processes. The exact quantity per package depends on the manufacturer's specifications.

Specifications

• Output voltage: 3.3V
• Input voltage range: 4.5V to 26V
• Dropout voltage: 0.6V (typical)
• Maximum output current: 1.5A
• Line regulation: ±0.02%/V
• Load regulation: ±0.04%/A
• Quiescent current: 75µA (typical)
• Operating temperature range: -40°C to +125°C

Detailed Pin Configuration

The MIC2937A-3.3BU TR has the following pin configuration:

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

Functional Features

• Voltage regulation: The regulator maintains a constant output voltage of 3.3V, regardless of input voltage fluctuations.
• High current capability: It can deliver up to 1.5A of continuous current to power various electronic components.
• Low dropout voltage: The low dropout voltage ensures efficient power conversion and minimizes power dissipation.
• Thermal shutdown protection: The regulator includes a thermal shutdown feature that shuts off the output when the temperature exceeds a safe limit.
• Short-circuit protection: Built-in short-circuit protection prevents damage to the regulator and connected devices in case of a short circuit.

Advantages and Disadvantages

Advantages

• Stable output voltage regulation
• High current handling capability
• Low dropout voltage for efficient power conversion
• Thermal and short-circuit protection for enhanced reliability
• Wide operating temperature range

Disadvantages

• Limited output voltage options (fixed at 3.3V)
• Relatively higher quiescent current compared to some other regulators

Working Principles

The MIC2937A-3.3BU TR is a linear voltage regulator based on a pass transistor and feedback control mechanism. It regulates the output voltage by comparing it with an internal reference voltage and adjusting the pass transistor accordingly. When the input voltage exceeds the desired output voltage, the pass transistor reduces the excess voltage, ensuring a stable output. The regulator continuously monitors the output voltage and adjusts the pass transistor to maintain the desired voltage level.

Detailed Application Field Plans

The MIC2937A-3.3BU TR finds applications in various electronic systems where a stable and regulated 3.3V power supply is required. Some common application fields include:

1. Microcontrollers and microprocessors
2. Digital logic circuits
3. Communication systems
4. Industrial control systems
5. Automotive electronics
6. Power management modules

Detailed and Complete Alternative Models

• LM1117-3.3: A popular alternative with similar specifications and pin configuration.
• LT1086-3.3: Another alternative offering adjustable output voltage with comparable performance.
• TPS76333: An alternative from Texas Instruments with low dropout voltage and high current capability.

These alternative models provide similar functionality and can be considered as substitutes for the MIC2937A-3.3BU TR in various applications.

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