XC6221B302NR-G

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

The XC6221B302NR-G is a fixed-output low dropout regulator from Torex Semiconductor, providing a nominal 3.0V output with a maximum current of 200mA. It operates within an input voltage range of 1.6V to 6.0V and features a typical dropout voltage of 80mV at 100mA load. The device includes a CE control pin without an internal pull-down resistor and incorporates an internal auto-discharge function for the output capacitor. It utilizes SSOT-24 packaging and maintains a supply current of 25μA.

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

• Integrates a P-channel MOSFET driver with error amplifier and reference voltage source for stable regulation.
• Features an active-high CE control pin that enables shutdown mode with ultra-low standby current consumption.
• Includes an internal auto-discharge switch that rapidly pulls the output voltage to ground level upon shutdown.
• Supports phase compensation using low ESR ceramic capacitors for compact circuit design.

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 variant matches the required footprint, as the XC6221 series spans multiple packages including SOT-25, USP-4, and USPN-4. Confirm the presence of the CL auto-discharge feature by checking the 'B' designation in the part number. Ensure the output accuracy class aligns with system requirements, noting standard versus high-accuracy options. Cross-reference the CE pin logic to ensure compatibility with the host controller's idle state behavior.

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

Select this component when a fixed 3.0V rail is needed with minimal quiescent current draw. The B-type designation ensures rapid output discharge, which is critical for battery-powered applications requiring quick power-off states. Verify that the application load does not exceed the 200mA limit under worst-case thermal conditions. Consider the SSOT-24 package size constraints relative to available PCB real estate compared to other series variants.

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

This regulator belongs to the XC6221 series, characterized by high-speed response and low noise performance. The series offers various output voltages selectable in 0.05V increments via laser trimming. It is designed for portable electronics where space and power efficiency are paramount. The CMOS architecture allows for operation with small external components, facilitating miniaturization in modern mobile hardware designs.

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

XC6221B302MR-G (SOT-25 package)

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

How does the XC6221B302NR-G handle output discharge during shutdown?

It utilizes an internal N-channel transistor and auto-discharge resistance to rapidly pull the VOUT pin to the VSS level when the CE pin is set to low.

What is the logic requirement for the CE pin on this specific model?

The XC6221B series lacks an internal pull-down resistor; therefore, the CE pin must be driven to a defined high or low level to prevent undefined states.