XC6221D442MR-G

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

The XC6221D442MR-G is a fixed-output CMOS LDO regulator from Torex Semiconductor, housed in an SOT-25 package. It provides a nominal output voltage of 4.4V with a maximum continuous output current of 200mA. The device operates within an input voltage range of 1.6V to 6.0V and features a typical dropout voltage of 80mV at 100mA load. Electrical characteristics include a standard output accuracy of +2% for voltages above 1.50V, a supply current of 25μA, and a standby current of 0.01μA. It incorporates a CE control pin with an internal pull-down resistor and includes an auto-discharge function.

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

• Integrates an internal auto-discharge switch that rapidly pulls the output voltage to the ground level when the enable signal is deactivated.
• Features an active-high CE control pin equipped with an internal pull-down resistor to ensure a defined off-state without external components.
• Utilizes laser trimming technology during manufacturing to achieve precise factory-set output voltage increments.

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 required for your design. Confirm that the D-type designation aligns with the need for the internal CE pull-down resistor and CL auto-discharge functionality. Ensure the 4.4V fixed output matches the target rail requirements before finalizing procurement.

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

Select this component when a low quiescent current and fast transient response are required for battery-powered applications. The inclusion of the auto-discharge feature makes it suitable for systems requiring rapid power-down states. Verify that the thermal dissipation capabilities of the SOT-25 package are sufficient for the expected power loss under maximum load conditions.

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

This part belongs to the XC6221 series of high-speed, low-dropout regulators designed for portable electronics. The series offers various output voltages and package options, including USP-4, SSOT-24, and USPN-4. The XC6221D variant specifically denotes the configuration with an internal CE pull-down resistor and output capacitor discharge capability.

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

XC6221B442MR-G

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

How does the XC6221D442MR-G handle the output voltage when the CE pin is set to low?

Due to the D-type designation, the IC activates an internal auto-discharge switch. This discharges the electric charge stored on the output capacitor, causing the VOUT pin to quickly return to the VSS level.

What is the function of the internal pull-down resistor on the CE pin?

The internal pull-down resistor ensures that if the CE pin is left open or floating, the IC remains in the OFF state (output at VSS level), preventing undefined operation or unintended startup.