About this part

TPS79933DDCT – 3.3V 200mA Low-Dropout (LDO) Voltage Regulator – Texas Instruments

Optimize your power management with the TPS79933DDCT LDO regulator from Texas Instruments. This high-performance IC delivers a stable 3.3V output with ultra-low dropout voltage, making it ideal for space-constrained and battery-sensitive designs. PCX exclusively supplies this active-status component with guaranteed authenticity and rapid shipping.

Key Features

• Fixed 3.3V Output with ±2% accuracy
• Ultra-Low Dropout: 0.16V (max) @ 200mA
• Wide Input Range: Up to 6.5V
• Minimal Quiescent Current: 60 µA (typ)
• High PSRR: 70dB @ 100Hz
• Robust Protections: Over-current, thermal shutdown, reverse polarity & UVLO

Technical Specifications

• Package: SOT-23-5 Thin (TSOT-23-5)
• Mounting: Surface Mount (SMD)
• Operating Temp: -40°C to +125°C
• Enable Control: Active-high enable pin
• Regulator Type: Single-channel positive fixed output

Note: Product images are representational. Refer to datasheet for exact dimensions. Download Datasheet

Typical Applications

• Portable battery-powered devices
• IoT sensors and wearables
• Medical monitoring equipment
• Industrial control systems
• Automotive infotainment modules

About Texas Instruments

Texas Instruments (TI) is a global semiconductor leader with over 90 years of innovation in analog and embedded processing technologies. Their power management ICs set industry standards for efficiency and reliability, serving mission-critical applications from aerospace to medical devices.

TI’s rigorous quality control and extensive R&D investment ensure components like the TPS79933DDCT meet stringent performance requirements. Their commitment to long-term product lifecycle support guarantees design stability for industrial and automotive customers.

About LDO Voltage Regulators

Low-dropout (LDO) regulators provide precise voltage conversion with minimal input-to-output differential, making them essential for modern electronics where stable power is critical despite fluctuating supply voltages. They eliminate switching noise while efficiently stepping down voltages in battery-operated systems.

Unlike switching regulators, LDOs like the TPS79933DDCT operate without inductors, simplifying PCB layout and reducing EMI. Their compact footprint and integrated protections make them ideal for noise-sensitive analog circuits, microcontrollers, and RF modules where clean power rails determine system performance.

Packaging Options

Available in industry-standard formats for automated assembly:

• Tape & Reel (TR)
• Cut Tape (CT)
• Digi-Reel®

Frequently Asked Questions

Q: What is the dropout voltage at maximum load?
A: 0.16V maximum when delivering 200mA output current.

Q: Does this LDO require external capacitors?
A: Yes, a 1µF ceramic input capacitor and 1µF ceramic output capacitor are recommended for stability.

Q: Can it handle automotive voltage transients?
A: With 6.5V max input rating and reverse polarity protection, it’s suitable for 12V automotive systems with proper transient suppression.

Q: How does enable pin functionality work?
A: Applying >1.5V to EN pin activates the regulator; pulling <0.4V disables it, reducing quiescent current to 0.1µA.

Q: Is this compatible with lead-free soldering?
A: Yes, the SOT-23-THIN package meets RoHS requirements and supports lead-free reflow profiles.

Q: What makes LDOs preferable over switching regulators?
A: LDOs generate zero switching noise, have simpler designs, and provide faster transient response – critical for sensitive analog/RF circuits.

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