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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) 4.2V
Voltage - Output (Max) -
Voltage Dropout (Max) 0.14V @ 100mA
Current - Output 200mA
Current - Quiescent (Iq) 50 µA
Current - Supply (Max) -
PSRR 60dB (1kHz)
Control Features Enable
Protection Features Over Current
Operating Temperature -40°C ~ 85°C (TA)
Grade -
Qualification -
Mounting Type Surface Mount
Package / Case SC-74A, SOT-753
Supplier Device Package SOT-25
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The XC6221A422MR-G is a 200mA LDO regulator from Torex Semiconductor with a fixed 4.2V output. It features an ultra-low quiescent current of 50µA and a dropout voltage of just 0.14V at 100mA. The SOT-25 package is widely adopted for easy manufacturing. With 60dB PSRR at 1kHz, it provides clean power for battery-operated devices.

  • Ultra-Low Power: 50µA quiescent current extends battery life.
  • Industry-Standard Package: SOT-25 for easy assembly and replacement.
  • Low Dropout: 0.14V at 100mA reduces power loss.
  • Stable Output: 60dB PSRR at 1kHz for reliable operation.

Li-ion Battery Charging Circuits

4.2V output matches full-charge voltage for battery management systems.

Portable Instruments

Low 50µA quiescent current extends battery life in handheld meters.

Wireless Earbuds

SOT-25 package and 200mA output suit compact charging case circuits.

Smoke Detectors

Ultra-low standby current ensures 10-year battery life compliance.

Remote Controls

Stable 4.2V rail for IR transmitters and microcontrollers.

Medical Patches

Small footprint and low dropout support wearable health monitors.

Q: What is the output voltage?
A: Fixed 4.2V output.
Q: What is the maximum current?
A: 200mA.
Q: What is the input voltage range?
A: Typical input is 4.2V.
Q: What is the dropout voltage?
A: 0.14V at 100mA.
Q: What is the quiescent current?
A: 50µA.
Q: What package is used?
A: SOT-25 package.
Base Product Number : XC6221A422MR
200mA 4.2V Battery LDO Linear Regulator Low Quiescent Current SOT-25 Torex
Q: What is the output voltage?
A: Fixed 4.2V output.
Q: What is the maximum current?
A: 200mA.
Q: What is the input voltage range?
A: Typical input is 4.2V.
Q: What is the dropout voltage?
A: 0.14V at 100mA.
Q: What is the quiescent current?
A: 50µA.
Q: What package is used?
A: SOT-25 package.