NCV1117ST33T3G: A Comprehensive Guide to onsemi's High-Efficiency Linear Voltage Regulator

The NCV1117ST33T3G from onsemi represents the gold standard in linear voltage regulation, offering engineers a perfect balance of performance, reliability, and efficiency. This in-depth guide explores every aspect of this remarkable IC, helping you understand why it's become the go-to solution for power management across multiple industries.

Detailed Product Overview

Manufactured by semiconductor leader onsemi, the NCV1117ST33T3G is a fixed-output positive voltage regulator delivering:

• Precise 3.3V output voltage ( 2% accuracy)
• Substantial 1A output current capacity
• Exceptional thermal performance in SOT-223 package

Technical Specifications Deep Dive

Voltage Characteristics

The regulator accepts input voltages up to 20V absolute maximum, with recommended operation up to 15V. Key voltage parameters include:

• Dropout voltage: 1.2V typical at 800mA load
• Line regulation: 0.2% typical (4.75V V_IN 12V)
• Load regulation: 0.4% typical (10mA I_OUT 1A)

Current Performance

Beyond its 1A continuous output rating, the device features:

• Peak current capability: 1.5A (transient)
• Low quiescent current: 10mA maximum
• Current limit threshold: 1.1A typical

Advanced Features and Benefits

Thermal Management

The SOT-223 package delivers outstanding thermal performance:

• Thermal resistance (junction-to-ambient): 62 C/W
• Thermal shutdown threshold: 150 C typical
• Recommended operating junction temperature: -40 C to +125 C

Noise Reduction

Superior power supply rejection:

• PSRR: 64dB at 120Hz
• Output noise voltage: 50 V_RMS (10Hz to 100kHz)
• Optional bypass capacitor for enhanced noise performance

Design Considerations

Application Circuits

Typical implementation requires just two external components:

1. Input capacitor: 10 F ceramic (recommended)
2. Output capacitor: 22 F ceramic (minimum)

Layout Guidelines

For optimal performance:

• Minimize trace length to input/output capacitors
• Use wide copper areas for thermal dissipation
• Keep sensitive analog circuits away from regulator

Industry Applications

Automotive Systems

Ideal for:

• ECU power supplies
• Infotainment systems
• ADAS sensor modules

Industrial Equipment

Perfect for:

• PLC I/O modules
• Motor control circuits
• Industrial automation controllers

Consumer Electronics

Widely used in:

• Smart home devices
• Wi-Fi routers
• Portable electronics

Comparative Advantages

The NCV1117ST33T3G outperforms competing regulators with:

• Lower dropout voltage than traditional 78xx series
• Better thermal performance than SOT-89 packages
• Higher current capability than most SOT-223 regulators
• AEC-Q100 qualified for automotive applications

Purchasing Information

Available through authorized distributors:

• Standard packaging: 2,500 units/reel
• Lead-free and RoHS compliant
• Extended temperature samples available

Conclusion

The NCV1117ST33T3G stands as a testament to onsemi's engineering excellence, delivering unmatched voltage regulation in a compact, thermally-efficient package. Its combination of high current capability, precise voltage regulation, and robust protection features make it the ideal choice for demanding applications across automotive, industrial, and consumer markets.

For design engineers seeking reliable power management solutions, the NCV1117ST33T3G offers the perfect balance of performance and value. Its proven reliability and extensive feature set ensure your power supply design will meet the most stringent requirements while maintaining cost-effectiveness.