Richtek USA Inc. RT9198-18GJ5

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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) 0.33V @ 300mA
Current - Output 300mA
Current - Quiescent (Iq) 130 μA
Current - Supply (Max) -
PSRR 60dB ~ 30dB (100Hz ~ 10kHz)
Control Features -
Protection Features Over Current, Over Temperature
Operating Temperature -40°C ~ 125°C
Grade -
Qualification -
Mounting Type Surface Mount
Package / Case SOT-23-5 Thin, TSOT-23-5
Supplier Device Package TSOT-23-5
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The RT9198-18GJ5 is a fixed-output low dropout linear regulator from Richtek, providing a stable 1.8V rail at up to 300mA. With a low 130 μA quiescent current and 0.33V dropout voltage, it is optimized for battery-powered and portable applications. The TSOT-23-5 package offers a compact, thermally efficient solution for space-constrained designs, while high PSRR ensures clean power for noise-sensitive circuits.

  • Low Quiescent Current: 130 μA reduces power consumption, ideal for battery-operated devices.
  • High PSRR: 60dB to 30dB (100Hz-10kHz) provides excellent noise rejection for sensitive circuits.
  • Low Dropout: 0.33V at 300mA enables efficient operation with minimal headroom.
  • Compact TSOT-23-5 Package: Small footprint with good thermal performance for space-limited designs.

FPGA and DSP Core Supplies

The fixed 1.8V output with 300mA capability is ideal for powering digital cores in FPGAs, DSPs, and ASICs that require clean, stable voltage.

Battery-Powered Wireless Sensors

Low 130 μA quiescent current makes it perfect for wireless sensor networks, smart meters, and environmental monitors that operate on battery power for extended periods.

Precision Analog Circuits

High PSRR (60dB at 100Hz, 30dB at 10kHz) ensures minimal noise coupling for precision analog-to-digital converters, op-amps, and sensor interfaces.

Portable Audio Equipment

The clean output and low dropout make it suitable for portable audio players, noise-canceling headphones, and recording devices requiring quiet power rails.

Embedded Systems

Ideal for powering microcontrollers, memory modules, and peripheral interfaces in embedded systems where board space is at a premium.

Smart Home Devices

The TSOT-23-5 package and efficient operation make it suitable for smart thermostats, security cameras, and home automation hubs.

Q: What is the output voltage of the RT9198-18GJ5?
A: The RT9198-18GJ5 provides a fixed output voltage of 1.8V.
Q: What is the maximum output current?
A: This LDO can deliver up to 300mA of 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 dropout voltage is 0.33V at a 300mA load.
Q: What is the quiescent current?
A: The quiescent current is 130 μA.
Q: What package is the RT9198-18GJ5 available in?
A: It is available in the TSOT-23-5 package.
Base Product Number : RT9198
1.8V 300mA Fixed Output High PSRR LDO Linear Regulator Low Quiescent Current Richtek TSOT-23-5
Q: What is the output voltage of the RT9198-18GJ5?
A: The RT9198-18GJ5 provides a fixed output voltage of 1.8V.
Q: What is the maximum output current?
A: This LDO can deliver up to 300mA of 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 dropout voltage is 0.33V at a 300mA load.
Q: What is the quiescent current?
A: The quiescent current is 130 μA.
Q: What package is the RT9198-18GJ5 available in?
A: It is available in the TSOT-23-5 package.