XC6221B452NR-G

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

The XC6221B452NR-G is a fixed-output low dropout regulator from Torex Semiconductor, providing a nominal output voltage of 4.5 V with a standard accuracy of ±2%. It operates within an input voltage range of 1.6 V to 6.0 V and delivers a maximum output current of 200 mA. The device features a typical supply current of 25 μA and achieves a ripple rejection rate of 70 dB at 1 kHz. Packaged in the SSOT-24 form factor, it supports an operating ambient temperature range from -40°C to +85°C.

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 control pin is deactivated.
• Incorporates a fold-back current limiter circuit that functions as short-circuit protection while limiting output current during overload conditions.
• Maintains stable phase compensation using low ESR ceramic capacitors for the required output capacitance.

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 designation NR-G corresponds to the SSOT-24 footprint required for your layout. Confirm the B-series designation ensures the presence of the CL auto-discharge function. Ensure the CE pin logic aligns with your system's active-high control requirements before finalizing the component selection.

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

Select this part when a fixed 4.5 V rail is needed with minimal quiescent current consumption. The SSOT-24 package offers a compact solution for space-constrained designs. Verify that the load current does not exceed 200 mA and that the input voltage remains within the specified 1.6 V to 6.0 V operational window.

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

This component belongs to the XC6221 series of high-speed CMOS regulators manufactured by Torex Semiconductor. The series utilizes laser trimming technology to set precise output voltages in small increments. The B-type designation specifically indicates the inclusion of an internal capacitor discharge mechanism for faster shutdown response times compared to other variants.

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

XC6221B452MR-G

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

How does the XC6221B452NR-G handle output discharge upon shutdown?

The device includes an internal auto-discharge switch connected between the output and ground. When the CE pin is driven low, this switch activates to rapidly discharge the output capacitor, ensuring the output voltage quickly returns to the VSS level.

What is the behavior of the CE pin if left open?

For the XC6221B series, leaving the CE pin open results in an undefined state where the output voltage may become unstable. The pin must be actively driven high or low to ensure proper operation.