Richtek USA Inc. RT9166-33GX
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $94,999.99 | $94,999.99 |
| 15+ | $91,999.99 | $1,379,999.85 |
| 25+ | $89,999.99 | $2,249,999.75 |
| 50+ | $84,999.99 | $4,249,999.50 |
| 100+ | $74,999.99 | $7,499,999.00 |
| N+ | $15,000.00 | Price Inquiry |
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| Product attributes | Property Value |
| Manufacturer | Richtek USA Inc. |
| Product Series | |
| Packaging | | |
| Output Configuration | Active |
| Output Type | Positive |
| Number of Regulators | Fixed |
| Voltage - Input (Max) | 5.5V |
| Voltage - Output (Min/Fixed) | 3.3V |
| Voltage - Output (Max) | - |
| Voltage Dropout (Max) | 0.23V @ 300mA (Typ) |
| Current - Output | 300mA |
| Current - Quiescent (Iq) | 300 μA |
| Current - Supply (Max) | - |
| PSRR | 55dB (1kHz) |
| Control Features | - |
| Protection Features | Over Current, Over Temperature |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Grade | - |
| Qualification | - |
| Mounting Type | Surface Mount |
| Package / Case | TO-243AA |
| Supplier Device Package | SOT-89-3 |
| ROHS |
The RT9166-33GX is a fixed 3.3V low dropout regulator from Richtek, delivering up to 300mA with a typical dropout of 0.23V. It features a low 300 μA quiescent current and 55dB PSRR at 1kHz, ensuring efficient and noise-free operation. The SOT-89-3 package provides good thermal performance for a wide range of applications.
- Industry-Standard 3.3V: Directly powers common logic, memory, and peripheral ICs without additional conversion.
- High Efficiency: Low dropout voltage minimizes power dissipation, especially in battery-operated systems.
- Robust Noise Filtering: 55dB PSRR at 1kHz ensures stable operation in noisy digital environments.
- Enhanced Thermal Handling: SOT-89-3 package dissipates heat effectively for reliable operation at higher currents.
Microcontroller and Digital Systems
The 3.3V output is the standard for many MCUs, FPGAs, and digital peripherals, providing a stable and efficient power source.
Industrial Control Interfaces
With 300mA output and low dropout, this regulator can power PLC I/O modules and fieldbus transceivers requiring a clean 3.3V rail.
Networking Equipment
Power Ethernet PHYs, switches, and routers with a reliable 3.3V supply, benefiting from 55dB PSRR to minimize data corruption.
Consumer Electronics
Ideal for set-top boxes, smart TVs, and gaming peripherals that need a robust 3.3V rail for various ICs.
Battery Management Systems
Provide a regulated 3.3V supply for battery monitoring ICs in portable devices, ensuring accurate voltage and current sensing.
- Q: What is the output voltage of the RT9166-33GX?
- A: The RT9166-33GX provides a fixed output voltage of 3.3V.
- Q: What is the maximum output current?
- A: This LDO can deliver up to 300mA of continuous output current.
- Q: What is the input voltage range?
- A: The input voltage range is not specified in the provided data; please refer to the official datasheet for this parameter.
- Q: What is the dropout voltage?
- A: The typical dropout voltage is 0.23V at a 300mA load.
- Q: What is the quiescent current?
- A: The quiescent current is typically 300 μA.
- Q: What package is available?
- A: This model comes in a SOT-89-3 package.
- Q: What is the output voltage of the RT9166-33GX?
- A: The RT9166-33GX provides a fixed output voltage of 3.3V.
- Q: What is the maximum output current?
- A: This LDO can deliver up to 300mA of continuous output current.
- Q: What is the input voltage range?
- A: The input voltage range is not specified in the provided data; please refer to the official datasheet for this parameter.
- Q: What is the dropout voltage?
- A: The typical dropout voltage is 0.23V at a 300mA load.
- Q: What is the quiescent current?
- A: The quiescent current is typically 300 μA.
- Q: What package is available?
- A: This model comes in a SOT-89-3 package.

RT9166-33GX.pdf