XC6221D332MR-G

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

The XC6221D332MR-G is a fixed-output linear low-dropout regulator manufactured by Torex Semiconductor Ltd. It provides a nominal output voltage of 3.3V 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. It incorporates a CE control pin with an internal pull-down resistor and includes an auto-discharge function for the output capacitor. The component is housed in a SOT-25-5 surface-mount package.

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

• Integrated CE control pin with internal pull-down resistor for reliable shutdown logic
• Built-in CL auto-discharge circuit to rapidly reduce output voltage during standby mode
• Fold-back current limiter providing short-circuit protection and output current limiting
• Compatible with low ESR ceramic capacitors for phase compensation

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

• Smart phones and mobile phones
• Portable game consoles
• Digital still cameras and camcorders
• Digital audio equipment
• Mobile devices and terminals

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

Verify that the specific part number matches the required output voltage, accuracy class, and package type. Confirm the presence of the D suffix indicating the internal CE pull-down resistor and B/D type auto-discharge functionality. Ensure compliance with environmental standards such as RoHS and Halogen-free requirements before finalizing procurement specifications.

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

Select this component when a fixed 3.3V supply is required with active high enable control and automatic output discharge. The SOT-25 package suits applications needing moderate thermal dissipation. Verify that the system can tolerate the internal pull-down current on the CE pin during operation. Ensure the output capacitor meets the minimum capacitance requirements for stability across the operating temperature range.

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

This device belongs to the XC6221 series of CMOS LDO regulators from Torex Semiconductor. The series offers various output voltages and packages including USP-4, SOT-25, SSOT-24, and USPN-4. The XC6221D variant specifically integrates an internal pull-down resistor on the CE pin and features an auto-discharge switch for the output capacitor, distinguishing it from A and C types.

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

XC6221B332MR-G

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

How does the XC6221D332MR-G handle output discharge when disabled?

The device features a CL auto-discharge function. When the CE pin is pulled low, an internal N-channel transistor connects the output to ground via a discharge resistance, allowing the output capacitor to discharge rapidly 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 the IC turns off automatically if the CE pin is left open or floating. This prevents undefined states and potential instability that might occur in other variants without this feature.