IRU1117-33CD

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: SOT-223

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

Packaging/Quantity: The IRU1117-33CD is typically sold in reels or tubes, with each reel/tube containing a specific quantity of ICs. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Input Voltage Range: 4.75V to 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 IRU1117-33CD has the following pin configuration:

```

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| | --| VIN GND |-- --| VOUT NC |-- |___________| ```

• VIN: Input voltage pin
• GND: Ground pin
• VOUT: Output voltage pin
• NC: No connection pin

Functional Features

• Low dropout voltage: The IRU1117-33CD 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 deliver up to 800mA of current to power various electronic components.
• Thermal shutdown protection: The IC has built-in protection to prevent overheating and damage.
• Short circuit current limit: It limits the current in case of a short circuit, protecting the IC and the connected components.
• Fast transient response: The regulator quickly responds to changes in load conditions, maintaining a stable output voltage.

Advantages and Disadvantages

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

Disadvantages: - Limited output current compared to some other voltage regulators. - Requires external capacitors for stability.

Working Principles

The IRU1117-33CD is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It operates by comparing the reference voltage with a fraction of the output voltage. Any difference between the 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 IRU1117-33CD can be used in various applications, including but not limited to: 1. Powering microcontrollers and other digital ICs in electronic devices. 2. Providing a stable voltage source for analog circuits and sensors. 3. Regulating voltage for battery-powered devices. 4. Powering audio amplifiers and other audio-related components. 5. Voltage regulation in automotive electronics.

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to the IRU1117-33CD are: - LM1117-3.3: A popular low dropout voltage regulator with similar specifications. - LT1117-3.3: Another widely used linear regulator with comparable features. - MCP1700-3302E: A low dropout voltage regulator from Microchip Technology.

These alternative models offer similar functionality and can be used as replacements for the IRU1117-33CD in various applications.

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