IRU1117-18CY

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 IRU1117-18CY is a voltage regulator IC that provides a fixed output voltage of 1.8V with a maximum output current of 1A.

Packaging/Quantity: The IRU1117-18CY is typically sold in reels or tubes, containing a specific quantity of ICs per package.

Specifications

• Input Voltage Range: 2.5V to 12V
• Output Voltage: 1.8V
• Output Current: Up to 1A
• Dropout Voltage: 0.6V typical at 1A
• Line Regulation: ±0.2% typical
• Load Regulation: ±0.4% typical
• Quiescent Current: 120µA typical
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The IRU1117-18CY 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 ground for fixed output voltage)

Functional Features

• Low dropout voltage allows operation with small input-output voltage differentials.
• High output current capability enables the use of the IC in various applications.
• Thermal shutdown protection prevents damage due to excessive temperature.
• Short circuit current limit protects the IC and connected components during a short circuit condition.
• Fast transient response ensures stability and accurate voltage regulation during load changes.

Advantages

• Compact TO-220 package allows for easy integration into various electronic circuits.
• Wide input voltage range provides flexibility in different power supply applications.
• Low quiescent current minimizes power consumption when the IC is idle.
• Excellent line and load regulation ensure a stable output voltage under varying conditions.

Disadvantages

• Fixed output voltage limits its versatility compared to adjustable voltage regulators.
• Dropout voltage of 0.6V may not be suitable for applications with low input voltages.

Working Principles

The IRU1117-18CY is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It operates by comparing the reference voltage (1.8V) with the feedback voltage from the output, adjusting the pass transistor to maintain a constant output voltage.

Detailed Application Field Plans

The IRU1117-18CY can be used in various applications, including but not limited to: - Power supplies for microcontrollers and digital circuits - Battery-powered devices - Automotive electronics - Industrial control systems - Consumer electronics

Detailed and Complete Alternative Models

Some alternative models to the IRU1117-18CY include: - LM1117-1.8: A similar fixed 1.8V voltage regulator from Texas Instruments. - LT1117-1.8: Another 1.8V fixed voltage regulator from Linear Technology. - MCP1702-1802E: Microchip's 1.8V fixed voltage regulator with low dropout voltage.

These alternative models offer similar functionality and can be considered as substitutes depending on specific requirements.

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