TPS79933DDCR: Texas Instruments' Premium 3.3V Linear Voltage Regulator IC

The TPS79933DDCR represents Texas Instruments' commitment to excellence in power management solutions. This high-performance linear voltage regulator IC delivers exceptional 3.3V voltage regulation with advanced features that make it stand out in the competitive PMIC market. Engineered for reliability and efficiency, this component has become a go-to choice for engineers designing power-sensitive applications across multiple industries.

In-Depth Technical Specifications

Voltage Characteristics

• Input Voltage Range: 2.7V to 6.5V
• Fixed Output Voltage: 3.3V 2% accuracy
• Dropout Voltage: 160mV typical at 200mA load

Current Performance

• Output Current: 200mA continuous
• Quiescent Current: 60 A typical (75 A max)
• Shutdown Current: <1 A

Package and Environmental Specifications

• Package: SOT-23-5 (DDC) thin package
• Dimensions: 2.9mm 1.6mm 1.2mm
• Operating Temperature: -40 C to +125 C

Advanced Features for Superior Performance

Enhanced Power Management

The TPS79933DDCR incorporates an intelligent enable pin (EN) that allows for complete shutdown when not in use, reducing power consumption to less than 1 A. This feature is particularly valuable for battery-operated devices where power conservation is critical.

Comprehensive Protection Suite

• Over-Current Protection: Automatically limits output current to prevent damage
• Thermal Shutdown: Activates at 160 C (typical) with hysteresis
• Reverse Current Protection: Prevents current flow from output to input
• Under-Voltage Lockout: Ensures proper operation during power-up

Exceptional Noise Rejection

With a Power Supply Rejection Ratio (PSRR) of 70dB at 100Hz and 38dB at 100kHz, the TPS79933DDCR excels in noisy environments, making it ideal for RF and sensitive analog circuits.

Design Advantages

Space-Efficient Solution

The compact SOT-23-5 package enables high-density PCB layouts while maintaining excellent thermal performance. The device requires minimal external components - typically just input and output capacitors - simplifying board design.

Stability and Reliability

Stable with low-ESR ceramic capacitors ( 1 F), the TPS79933DDCR offers robust performance across all operating conditions. Texas Instruments' rigorous quality control ensures high reliability with an MTBF exceeding 1 million hours.

Application Scenarios

Portable Electronics

Ideal for smartphones, tablets, and wearables where space and power efficiency are paramount. The low quiescent current significantly extends battery life.

IoT and Wireless Devices

Excellent for powering MCUs, sensors, and wireless modules in IoT applications. The high PSRR ensures clean power for sensitive RF components.

Industrial Systems

With its wide temperature range and robust protection features, the TPS79933DDCR is well-suited for industrial control systems, automation equipment, and harsh environment applications.

Comparative Advantages

When benchmarked against competing regulators, the TPS79933DDCR offers:

• Lower dropout voltage than comparable devices
• Better thermal performance in similar packages
• Superior PSRR for noise-sensitive applications
• More comprehensive protection features

Design Considerations

Layout Recommendations

For optimal performance:

1. Place input capacitor (1 F or greater) as close as possible to the VIN pin
2. Use a ground plane for thermal dissipation
3. Minimize trace lengths to the EN pin
4. Keep sensitive analog traces away from the regulator

Thermal Management

While the SOT-23-5 package has good thermal characteristics, for continuous full-load operation:

• Use thermal vias to inner ground layers
• Consider copper area expansion on the PCB
• Monitor case temperature in high ambient environments

Purchasing Information

The TPS79933DDCR is available through authorized Texas Instruments distributors worldwide. It's offered in tape-and-reel packaging (3000 units per reel) suitable for automated assembly processes. Sample quantities are available for evaluation and prototyping.

Conclusion

The TPS79933DDCR from Texas Instruments sets a new standard for compact, efficient linear voltage regulation. With its combination of low dropout voltage, ultra-low quiescent current, robust protection features, and excellent noise rejection, this regulator provides an optimal power solution for today's demanding electronic designs. Whether you're developing portable consumer devices, industrial equipment, or IoT solutions, the TPS79933DDCR delivers the performance and reliability your application requires.

For detailed technical specifications, application notes, and design resources, visit the official Texas Instruments product page or contact their technical support team for design assistance.