Richtek USA Inc. RT9166-18PVL

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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) 1.8V
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-236-3, SC-59, SOT-23-3
Supplier Device Package SOT-23-3
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The RT9166-18PVL from Richtek is a fixed 1.8V LDO regulator delivering 300mA with a typical dropout of just 0.23V. Its SOT-23-3 package is widely used and easy to integrate. With 300 μA quiescent current and 55dB PSRR, it offers a balanced solution for portable and low-power applications.

  • Low Dropout: 0.23V at 300mA maximizes efficiency in battery-powered designs.
  • Standard Package: SOT-23-3 is easy to source and assemble.
  • Versatile Output: 1.8V is compatible with many digital ICs.
  • Reasonable Quiescent Current: 300 μA balances performance and power consumption.

Digital Logic Power Supplies

The 1.8V output is perfect for powering I/O banks and logic cores in microcontrollers and FPGAs, ensuring reliable digital operation.

Portable Consumer Electronics

The SOT-23-3 package and 300mA output make it suitable for MP3 players, e-readers, and handheld gaming devices.

Battery-Powered Instruments

With a low dropout of 0.23V, it efficiently regulates from a 2-cell alkaline battery pack down to 1.8V.

Communication Modules

Provides a stable 1.8V rail for Bluetooth and Zigbee modules, with 55dB PSRR to reduce interference.

LED Driver Bias Supplies

Can bias LED driver ICs that require a precise 1.8V reference, ensuring consistent brightness control.

Q: What is the output voltage?
A: The RT9166-18PVL provides a fixed output voltage of 1.8V.
Q: What is the maximum output current?
A: It can deliver up to 300mA of output current.
Q: What is the input voltage range?
A: The input voltage range is centered around 1.8V; refer to the datasheet for the full range.
Q: What is the dropout voltage?
A: Dropout voltage is 0.23V at 300mA (typical).
Q: What is the quiescent current?
A: Quiescent current is 300 μA.
Q: What package is available?
A: It comes in a standard SOT-23-3 package.
Base Product Number : RT9166-18
1.8V 300mA LDO Linear Regulator Low Dropout Richtek SOT-23-3
Q: What is the output voltage?
A: The RT9166-18PVL provides a fixed output voltage of 1.8V.
Q: What is the maximum output current?
A: It can deliver up to 300mA of output current.
Q: What is the input voltage range?
A: The input voltage range is centered around 1.8V; refer to the datasheet for the full range.
Q: What is the dropout voltage?
A: Dropout voltage is 0.23V at 300mA (typical).
Q: What is the quiescent current?
A: Quiescent current is 300 μA.
Q: What package is available?
A: It comes in a standard SOT-23-3 package.