MC33289DW

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High-performance voltage regulator
• Package: SOIC-16
• Essence: Regulates and stabilizes voltage in electronic devices
• Packaging/Quantity: Tape & Reel, 2500 units per reel

Specifications

• Input Voltage Range: 4.5V to 40V
• Output Voltage Range: 1.25V to 37V
• Output Current: Up to 500mA
• Dropout Voltage: 0.6V at 100mA
• Quiescent Current: 75µA
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The MC33289DW is a 16-pin IC with the following pin configuration:

1. Vout
2. GND
3. Vref
4. Feedback
5. Compensation
6. Soft Start
7. Shutdown
8. Error Amplifier Inverting Input
9. Error Amplifier Non-Inverting Input
10. Error Amplifier Output
11. Current Limit
12. Thermal Shutdown
13. Power Ground
14. Vin
15. Enable
16. Bootstrap

Functional Features

• High accuracy and stability in regulating output voltage
• Low dropout voltage for efficient power management
• Built-in error amplifier for precise feedback control
• Soft start function to prevent inrush current
• Thermal shutdown protection to prevent overheating
• Current limit protection for safe operation

Advantages and Disadvantages

Advantages

• Wide input voltage range allows for versatile applications
• High output current capability for powering various loads
• Low quiescent current minimizes power consumption
• Compact SOIC-16 package for space-constrained designs
• Excellent line and load regulation for stable voltage output

Disadvantages

• Limited output current compared to higher power ICs
• Dropout voltage may affect efficiency in low input voltage scenarios
• Requires external components for proper operation

Working Principles

The MC33289DW is a voltage regulator that maintains a stable output voltage regardless of variations in the input voltage or load conditions. It achieves this by comparing the feedback voltage with a reference voltage and adjusting the output accordingly. The error amplifier amplifies the difference between these voltages, which is then used to control the pass transistor. This ensures that the output voltage remains within the specified range.

Detailed Application Field Plans

The MC33289DW finds applications in various electronic devices where voltage regulation is crucial. Some common application fields include:

1. Automotive electronics: Used in vehicle power systems to regulate voltage for different components such as sensors, actuators, and displays.
2. Industrial equipment: Provides stable voltage supply for control systems, motor drives, and communication modules.
3. Consumer electronics: Enables reliable voltage regulation in devices like smartphones, tablets, and portable audio players.
4. Power supplies: Utilized in AC-DC converters, DC-DC converters, and battery chargers to ensure consistent output voltage.

Detailed and Complete Alternative Models

1. LM317: Adjustable voltage regulator with a wide input voltage range and high output current capability.
2. LT1086: Low dropout voltage regulator suitable for applications requiring precise voltage regulation.
3. LM1117: Fixed output voltage regulator available in various voltage options with low quiescent current.
4. MAX603: Ultra-low quiescent current voltage regulator designed for battery-powered devices.

These alternative models offer similar functionality and can be considered based on specific requirements and design constraints.

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