XC6221D402GR-G

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

The XC6221D402GR-G is a fixed-output low dropout regulator from Torex Semiconductor, providing a nominal output voltage of 4.0V with standard accuracy. It operates within an input voltage range of 1.6V to 6.0V and delivers a maximum output current of 200mA. The device features a typical supply current of 25μA and standby current of 0.01μA. It includes a CE pin with an internal pull-down resistor and CL auto-discharge functionality. Packaged in USP-4, it supports operation from -40℃ to +85℃.

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

• Integrated charge discharge circuit for rapid output capacitor discharge upon shutdown
• Internal pull-down resistor on the control pin ensures defined off-state logic
• Capable of driving low ESR ceramic capacitors for stable phase compensation
• Fold-back current limiting provides short-circuit protection

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 package type and output voltage tolerance against the datasheet before integration. Confirm that the CE pin configuration matches the system's power management requirements. Ensure the selected output capacitor meets the minimum capacitance values specified for the 4.0V setting to maintain stability.

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

Select this component when a fixed 4.0V rail is required with minimal quiescent current consumption. The D-type designation indicates the presence of both an internal pull-down resistor and an auto-discharge switch, which simplifies external control circuitry and improves shutdown performance compared to other series variants.

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

This part belongs to the XC6221 series of high-speed CMOS LDO regulators. The series utilizes laser trimming technology to set precise output voltages in small increments. The D-series variant specifically incorporates internal pull-down resistors and auto-discharge switches, distinguishing it from A, B, and C types regarding control pin behavior and shutdown characteristics.

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

XC6221D401GR-G

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

How does the XC6221D402GR-G handle output voltage during shutdown?

The device features a CL auto-discharge function that actively discharges the electric charge stored in the output capacitor via an internal N-channel transistor, allowing 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, preventing undefined operation or unintended startup.