Richtek USA Inc. RT9166A-25GG
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $1.39 | $1.39 |
| 15+ | $1.34 | $20.10 |
| 25+ | $1.31 | $32.75 |
| 50+ | $1.24 | $62.00 |
| 100+ | $1.10 | $110.00 |
| N+ | $0.22 | Price Inquiry |
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| Product attributes | Property Value |
| Manufacturer | Richtek USA Inc. |
| Product Series | |
| Packaging | Cut Tape (CT) | Tape & Reel (TR) |
| Output Configuration | Positive |
| Output Type | Fixed |
| Number of Regulators | 1 |
| 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-261-4, TO-261AA |
| Supplier Device Package | SOT-223 |
| ROHS |
The RT9166A-25GG from Richtek is a fixed 2.5V LDO linear regulator capable of delivering 600mA. It features a typical dropout voltage of 0.58V at full load and a quiescent current of 300 µA. With 55dB PSRR at 1kHz, it provides clean power for noise-sensitive applications. The SOT-223 package offers excellent thermal performance for medium-power designs.
- High Output Current: 600mA capability supports a wide range of digital and analog loads.
- Good Noise Rejection: 55dB PSRR at 1kHz reduces ripple and interference.
- Thermal Efficiency: SOT-223 package dissipates heat effectively for reliable operation.
- Cost-Effective Solution: Simple LDO architecture provides an economical power solution.
Consumer Electronics Power
The 600mA output capability and SOT-223 package make it suitable for powering set-top boxes, routers, and other consumer devices requiring a stable 2.5V rail.
Industrial Control Systems
With 55dB PSRR at 1kHz, it effectively filters industrial power line noise, ensuring reliable operation of PLCs and motor controllers.
Networking Equipment
Provides clean 2.5V power for Ethernet PHYs and switch ICs, with sufficient current for multiple interface circuits.
Battery-Powered Devices
The 300 µA quiescent current balances performance and efficiency for portable instruments and handheld tools.
Audio/Video Equipment
Stable 2.5V output for DACs and video processors, with PSRR reducing hum and interference in AV systems.
Automotive Infotainment
Robust SOT-223 package handles thermal stress in dashboard-mounted systems, providing reliable 2.5V power.
- Q: What is the output voltage of the RT9166A-25GG?
- A: It provides a fixed output voltage of 2.5V.
- Q: What is the maximum output current?
- A: The maximum output current is 600mA.
- Q: What is the input voltage range?
- A: The input voltage range is not specified in the provided data; refer to the datasheet.
- Q: What is the dropout voltage?
- A: The typical dropout voltage is 0.58V at 600mA load.
- Q: What is the quiescent current?
- A: The quiescent current is 300 µA.
- Q: What package is available?
- A: It is available in a SOT-223 package.
- Q: What is the output voltage of the RT9166A-25GG?
- A: It provides a fixed output voltage of 2.5V.
- Q: What is the maximum output current?
- A: The maximum output current is 600mA.
- Q: What is the input voltage range?
- A: The input voltage range is not specified in the provided data; refer to the datasheet.
- Q: What is the dropout voltage?
- A: The typical dropout voltage is 0.58V at 600mA load.
- Q: What is the quiescent current?
- A: The quiescent current is 300 µA.
- Q: What package is available?
- A: It is available in a SOT-223 package.

RT9166A-25GG.pdf