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Product attributes Property Value
Manufacturer Torex Semiconductor Ltd
Product Series
Packaging Cut Tape (CT) | Tape & Reel (TR)
Output Configuration Positive
Output Type Fixed
Number of Regulators 1
Voltage - Input (Max) 6V
Voltage - Output (Min/Fixed) 1.8V
Voltage - Output (Max) -
Voltage Dropout (Max) 0.55V @ 150mA
Current - Output 150mA
Current - Quiescent (Iq) 900 nA
Current - Supply (Max) -
PSRR 60dB (1kHz)
Control Features Current Limit, Enable
Protection Features Over Current, Short Circuit
Operating Temperature -40°C ~ 105°C (TA)
Grade -
Qualification -
Mounting Type Surface Mount
Package / Case 4-XDFN Exposed Pad
Supplier Device Package 4-USPQ-B05 (1x1)

The XC6241B1819R-G from Torex Semiconductor is a fixed 1.8V low dropout linear regulator with a maximum output current of 150mA. Its standout feature is an ultra-low quiescent current of just 900nA, making it one of the most power-efficient regulators available. The dropout voltage is 0.55V at full load, and it offers 60dB PSRR at 1kHz. Housed in a tiny 4-USPQ-B05 (1x1mm) package, it is designed for battery-powered and energy-harvesting applications where power conservation is critical.

  • Ultra-Low Quiescent Current (900nA): Unmatched for battery-powered devices requiring years of standby operation.
  • 150mA Output Current: Sufficient for low-power MCUs, sensors, and wireless modules.
  • Ultra-Tiny 1x1mm Package: Enables the smallest possible PCB designs for medical and wearable devices.
  • 60dB PSRR at 1kHz: Provides adequate noise rejection for stable operation in mixed-signal environments.

Energy-Harvesting Systems

The 900nA quiescent current makes this LDO ideal for energy harvesting applications where the available current is extremely limited, such as solar or thermoelectric generators.

Always-On RTC and Backup Circuits

For real-time clocks and SRAM backup in meters and controllers, the XC6241B1819R-G maintains a stable 1.8V rail with negligible current draw, preserving data for years.

Bluetooth Low Energy Beacons

BLE beacons require ultra-low standby power. This regulator's 900nA IQ ensures the beacon can operate for extended periods on a coin cell battery.

Portable Medical Patches

Wearable health monitors that need to run for weeks on a tiny battery benefit from the ultra-low quiescent current and compact 4-USPQ-B05 package.

IoT Sensor Nodes with Duty Cycling

In duty-cycled systems, the regulator's low IQ during sleep mode significantly extends battery life, while the 150mA output supports active sensor readings.

Q: What is the output voltage of the XC6241B1819R-G?
A: The output voltage is fixed at 1.8V.
Q: What is the maximum output current?
A: It can deliver up to 150mA of output current.
Q: What is the input voltage range?
A: The input voltage must be above 1.8V plus dropout; typical range is 2.0V to 6.0V.
Q: What is the dropout voltage?
A: The dropout voltage is 0.55V at 150mA load.
Q: What is the quiescent current?
A: The quiescent current is extremely low at 900 nA (0.9 µA).
Q: What is the PSRR?
A: The power supply rejection ratio is 60dB at 1kHz.
Base Product Number : XC6241B1819
1.8V 150mA 4-USPQ-B05 900nA LDO Linear Regulator Torex Ultra-Low IQ
Q: What is the output voltage of the XC6241B1819R-G?
A: The output voltage is fixed at 1.8V.
Q: What is the maximum output current?
A: It can deliver up to 150mA of output current.
Q: What is the input voltage range?
A: The input voltage must be above 1.8V plus dropout; typical range is 2.0V to 6.0V.
Q: What is the dropout voltage?
A: The dropout voltage is 0.55V at 150mA load.
Q: What is the quiescent current?
A: The quiescent current is extremely low at 900 nA (0.9 µA).
Q: What is the PSRR?
A: The power supply rejection ratio is 60dB at 1kHz.