Richtek USA Inc. RT9166A-25GX
| 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) | 2.5V |
| Voltage - Output (Max) | - |
| Voltage Dropout (Max) | 0.58V @ 600mA (Typ) |
| Current - Output | 600mA |
| 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 RT9166A-25GX from Richtek is a fixed 2.5V low dropout linear regulator capable of delivering 600mA. Its low 0.58V dropout voltage and 300 μA quiescent current make it ideal for battery-operated systems. The SOT-89-3 package ensures efficient heat dissipation, while 55dB PSRR provides clean, stable power for sensitive electronics.
- Extended Battery Life: Low 300 μA quiescent current minimizes standby power draw.
- High Efficiency at Low Dropout: 0.58V dropout at 600mA allows operation from a 3.3V rail with minimal power loss.
- Clean Output: 55dB PSRR at 1kHz suppresses input noise, ideal for analog and RF circuits.
- Robust Thermal Performance: SOT-89-3 package dissipates heat effectively for reliable operation.
Battery-Powered Devices
Ideal for portable electronics where a stable 2.5V rail is needed from a 3.6V Li-ion battery. The low 300 μA quiescent current extends battery life during standby.
FPGA and DSP Core Supplies
Provides a clean, regulated 2.5V supply for low-voltage digital cores. The 55dB PSRR at 1kHz filters out power supply noise, ensuring reliable operation.
Industrial Sensor Interfaces
Powers precision analog sensors and ADCs requiring a stable 2.5V reference. The low dropout voltage (0.58V) allows operation from a 3.3V rail with headroom.
Networking Equipment
Supplies a regulated 2.5V rail for PHY transceivers and switch ICs. The 600mA current capability supports multiple loads simultaneously.
Automotive Infotainment
Regulates vehicle battery voltage down to 2.5V for audio codecs and display drivers. The SOT-89-3 package offers good thermal dissipation for continuous operation.
- Q: What is the fixed output voltage of the RT9166A-25GX?
- A: The RT9166A-25GX provides a fixed 2.5V output.
- Q: What is the maximum output current?
- A: It can deliver up to 600mA of output current.
- Q: What is the input voltage range for this regulator?
- A: The input voltage range is from 2.5V up to the absolute maximum rating (typically 7V).
- Q: What is the typical dropout voltage?
- A: The typical dropout voltage is 0.58V at a 600mA load.
- Q: What is the quiescent current consumption?
- A: The quiescent current is typically 300 μA.
- Q: What package is the RT9166A-25GX available in?
- A: It comes in a SOT-89-3 package.
- Q: What is the fixed output voltage of the RT9166A-25GX?
- A: The RT9166A-25GX provides a fixed 2.5V output.
- Q: What is the maximum output current?
- A: It can deliver up to 600mA of output current.
- Q: What is the input voltage range for this regulator?
- A: The input voltage range is from 2.5V up to the absolute maximum rating (typically 7V).
- Q: What is the typical dropout voltage?
- A: The typical dropout voltage is 0.58V at a 600mA load.
- Q: What is the quiescent current consumption?
- A: The quiescent current is typically 300 μA.
- Q: What package is the RT9166A-25GX available in?
- A: It comes in a SOT-89-3 package.

RT9166A-25GX.pdf