IRU1117-33CP

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

Characteristics: - Low dropout voltage - High output current capability - Thermal shutdown protection - Short circuit current limit - Fast transient response

Package: TO-220

Essence: The IRU1117-33CP is a low dropout voltage regulator IC that provides a fixed 3.3V output voltage with high output current capability.

Packaging/Quantity: The IRU1117-33CP is available in a TO-220 package and is typically sold in reels or tubes containing multiple units.

Specifications

• Input Voltage Range: 4.5V to 18V
• Output Voltage: 3.3V
• Dropout Voltage: 1.2V (typical)
• Output Current: Up to 800mA
• Quiescent Current: 120µA (typical)
• Line Regulation: 0.04%/V (typical)
• Load Regulation: 0.2% (typical)
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The IRU1117-33CP has the following pin configuration:

```

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| | --| VIN GND |-- --| VOUT ADJ |-- |___________| ```

• VIN: Input voltage
• GND: Ground
• VOUT: Output voltage
• ADJ: Adjustable pin (connected to a resistor for output voltage adjustment)

Functional Features

• Low dropout voltage: The IRU1117-33CP can regulate the output voltage even when the input voltage is only slightly higher than the desired output voltage.
• High output current capability: It can provide up to 800mA of output current, making it suitable for various applications.
• Thermal shutdown protection: The IC has built-in thermal shutdown protection to prevent damage due to excessive temperature.
• Short circuit current limit: It limits the output current in case of a short circuit, protecting the IC and the connected components.
• Fast transient response: The IRU1117-33CP quickly responds to changes in load conditions, maintaining a stable output voltage.

Advantages and Disadvantages

Advantages: - Low dropout voltage allows efficient regulation even with low input voltages. - High output current capability makes it suitable for powering a wide range of devices. - Thermal shutdown protection ensures reliable operation under high-temperature conditions. - Fast transient response enables stable performance during load variations.

Disadvantages: - Limited output voltage options (fixed at 3.3V). - Maximum output current may not be sufficient for some high-power applications.

Working Principles

The IRU1117-33CP is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It operates by comparing the reference voltage (1.25V) with a fraction of the output voltage. Any difference between these two voltages is amplified and used to control the pass transistor, adjusting its resistance to maintain a constant output voltage.

Detailed Application Field Plans

The IRU1117-33CP can be used in various applications, including but not limited to: - Powering microcontrollers and other digital ICs - Battery-powered devices - Automotive electronics - Industrial control systems - Consumer electronics

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the IRU1117-33CP are: - LM1117-3.3: A popular voltage regulator IC with a fixed 3.3V output voltage. - LT1117-3.3: Another low dropout voltage regulator IC with a fixed 3.3V output voltage. - MCP1700-3302E: A low quiescent current LDO regulator with a fixed 3.3V output voltage.

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

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