Richtek USA Inc. RT9166A-25GG

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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 RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

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.
Base Product Number : RT9166A-25
2.5V 600mA LDO Linear Regulator Low Dropout PSRR Richtek RT9166A-25 SOT-223
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.