IRU1117-33CY

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

Characteristics: - Low dropout voltage - High output current capability - Thermal shutdown protection - Short circuit current limit - Reverse polarity protection

Package: TO-252-3 (DPAK)

Essence: The IRU1117-33CY is a low dropout voltage regulator designed to provide a stable and regulated output voltage for various electronic devices.

Packaging/Quantity: The IRU1117-33CY is typically sold in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

• Input Voltage Range: 2.5V - 18V
• Output Voltage: 3.3V
• Output Current: Up to 800mA
• Dropout Voltage: 1.2V (typical)
• Line Regulation: ±0.2% (typical)
• Load Regulation: ±0.4% (typical)
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The IRU1117-33CY has three pins:

1. Input Pin (VIN): Connects to the input voltage source.
2. Output Pin (VOUT): Provides the regulated output voltage.
3. Ground Pin (GND): Connected to the ground reference.

Functional Features

• Low Dropout Voltage: The IRU1117-33CY has a low dropout voltage, allowing it to regulate the output voltage even when the input voltage is close to the desired output voltage.
• High Output Current Capability: With an output current capability of up to 800mA, this voltage regulator can power a wide range of electronic devices.
• Thermal Shutdown Protection: The IC includes thermal shutdown protection, which prevents overheating and damage to the device.
• Short Circuit Current Limit: The IRU1117-33CY has a built-in short circuit current limit feature that protects the regulator from excessive current flow in case of a short circuit.
• Reverse Polarity Protection: The IC is designed with reverse polarity protection, safeguarding it against accidental reverse connection.

Advantages and Disadvantages

Advantages: - Low dropout voltage ensures efficient regulation even with low input voltages. - High output current capability allows for powering various electronic devices. - Thermal shutdown protection prevents overheating and damage. - Short circuit current limit protects the regulator from excessive current flow. - Reverse polarity protection safeguards against accidental reverse connection.

Disadvantages: - Limited output current compared to some other voltage regulators in the market. - Higher cost compared to non-regulated voltage sources.

Working Principles

The IRU1117-33CY operates based on the principle of linear voltage regulation. It uses a pass transistor to regulate the output voltage by adjusting the resistance between the input and output pins. The internal circuitry compares the output voltage with a reference voltage and adjusts the pass transistor accordingly to maintain a stable output voltage.

Detailed Application Field Plans

The IRU1117-33CY can be used in various applications where a stable and regulated 3.3V power supply is required. Some common application fields include: - Microcontrollers and microprocessors - Digital logic circuits - Communication systems - Consumer electronics - Industrial control systems

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the IRU1117-33CY are: - LM1117-3.3: A popular voltage regulator with similar specifications and pin configuration. - LT1117-3.3: Another widely used voltage regulator with comparable characteristics. - MCP1702-3302E: A low dropout voltage regulator with a 3.3V output.

These alternative models can be considered based on specific requirements and availability in the market.

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