XC6221D372MR-G

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The XC6221D372MR-G is a high-accuracy, low-noise, high-speed, low dropout CMOS voltage regulator manufactured by Torex Semiconductor. It features a fixed output voltage of 3.70V with standard accuracy and operates within an input voltage range of 1.6V to 6.0V. The device delivers a maximum output current of 200mA and includes a CE control pin with an internal pull-down resistor for reliable shutdown. It incorporates CL auto-discharge functionality to rapidly discharge the output capacitor when disabled.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Integrates a CE control pin with an internal pull-down resistor to ensure defined logic states during shutdown.
• Features CL auto-discharge circuitry that actively discharges the output capacitor charge upon entering standby mode.
• Utilizes laser trimming technology to achieve precise factory-set output voltage selection in small increments.
• Incorporates fold-back current limiting and short-circuit protection circuits to safeguard against overload conditions.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Smart phones
• Portable game consoles
• Digital still cameras
• Mobile devices

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific suffix MR-G corresponds to the SOT-25 package configuration as documented in the official datasheet. Confirm that the D designator indicates the presence of both the CE pull-down resistor and the CL auto-discharge function. Ensure compatibility with the required output capacitance values for stable phase compensation at the specified 3.70V operating point.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when a fixed 3.70V output is required with integrated shutdown control and rapid output discharge capabilities. The SOT-25 package offers a balance of thermal performance and footprint size suitable for portable electronics. Consider the internal pull-down resistor feature if the CE pin must remain floating or unconnected without risking undefined logic states.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This part belongs to the XC6221 series of low dropout regulators designed for mobile and portable applications. The series provides various output voltages and accuracy grades. The XC6221D variant specifically combines the CE control function with an internal pull-down resistor and active output discharge, distinguishing it from variants lacking these safety features.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

XC6221D372MR

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators FAQ

How does the XC6221D differ from the XC6221B regarding the CE pin?

The XC6221D includes an internal pull-down resistor on the CE pin, ensuring the device turns off automatically if the pin is left open. The XC6221B lacks this resistor, leaving the CE pin in an undefined state if not connected.

What is the purpose of the CL auto-discharge function in this model?

The CL auto-discharge function uses an internal N-channel transistor to rapidly discharge the electric charge stored in the external output capacitor (CL) when the CE pin is driven low, allowing the output voltage to quickly return to the VSS level.