XC6221D472NR-G

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

The XC6221D472NR-G is a fixed-output linear regulator from Torex Semiconductor, delivering 4.70V at up to 200mA with SSOT-24 packaging. It features a low dropout voltage of 80mV at 100mA and operates within a 1.6V to 6.0V input range. The device includes an internal pull-down resistor on the CE pin and CL auto-discharge functionality for rapid output discharge. It offers high ripple rejection of 70dB at 1kHz and consumes only 25μA of supply current.

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

• Integrates an internal pull-down resistor on the control enable pin to prevent undefined states when left open.
• Features an automatic charge discharge circuit that rapidly reduces output voltage to ground upon shutdown.
• Provides high ripple rejection performance suitable for noise-sensitive portable applications.

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 matches the design requirements, as the XC6221 series utilizes multiple footprint options including SSOT-24. Confirm that the output voltage tolerance aligns with system constraints, noting standard accuracy varies by voltage level. Ensure the application leverages the built-in short-circuit protection and thermal characteristics defined in the datasheet for reliable operation.

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

Select this variant for designs requiring a fixed 4.70V rail with integrated shutdown discharge capabilities. The D-type designation ensures an internal pull-down resistor is present, simplifying control logic compared to A or B types. Consider the SSOT-24 package dimensions for PCB layout efficiency while ensuring adequate thermal dissipation for the intended load currents.

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

This component belongs to the XC6221 series of high-speed, low-noise CMOS LDO regulators. The series is characterized by low power consumption and fast response times, making it suitable for battery-powered electronics. The D suffix indicates specific internal circuitry regarding the CE pin configuration and output discharge mechanism distinct from other series variants.

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

XC6221A472NR-G

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

How does the XC6221D series handle the output capacitor charge during shutdown?

The XC6221D series includes an internal CL auto-discharge switch. When the CE pin is pulled low, this switch activates to rapidly discharge the electric charge stored in the output capacitor, bringing the VOUT pin quickly to the VSS level.

What is the function of the internal pull-down resistor in the XC6221D model?

The internal pull-down resistor connects the CE pin to VSS internally. This ensures that if the CE pin is left floating or open, the IC remains in the OFF state, preventing unintended operation due to noise or undefined logic levels.