XC6503A391MR-G

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

The XC6503A391MR-G is a CL capacitor-less 500mA high-speed CMOS LDO regulator manufactured by Torex Semiconductor. It provides a fixed output voltage of 3.9V with an accuracy of ±1% for voltages between 2.0V and 5.0V. The device operates within an input voltage range of 1.7V to 6.0V and features internal phase compensation, eliminating the need for external load capacitors. Key electrical characteristics include a typical supply current of 15μA, a dropout voltage of approximately 190mV at 300mA, and a power supply rejection ratio (PSRR) of 55dB at 1kHz. It incorporates fold-back current limiting, short-circuit protection, and thermal shutdown circuits.

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

• Capacitor-less operation enabled by internal phase compensation circuitry
• Integrated chip enable function for low-power standby control
• Built-in protection mechanisms including current limit, short-circuit, and thermal shutdown

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

• Smart phones and mobile phones
• Portable game consoles
• Wireless modules
• Camera modules
• Bluetooth modules

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

Verify the specific package type SOT-25 and the ordering suffix MR-G against official distributor catalogs or manufacturer datasheets to ensure correct component identification. Confirm that the A-series designation matches the required CE pin functionality and pull-down resistor specifications before finalizing procurement orders.

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

Select this component when a fixed 3.9V output is required in space-constrained designs where external output capacitors are undesirable. The A-series variant is suitable for applications needing a chip enable pin without an internal pull-down resistor. Ensure the input voltage remains within the 1.7V to 6.0V range and consider the thermal dissipation capabilities of the SOT-25 package under maximum load conditions.

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

This part belongs to the XC6503 series of low-dropout regulators from Torex Semiconductor. The series is characterized by its ability to operate stably without a load capacitor, saving board space. The XC6503A variant specifically includes a chip enable pin but lacks the internal pull-down resistor found in C and D types, offering flexibility in logic interface design.

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

XC6503A391PR-G

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

Does the XC6503A391MR-G require an external output capacitor?

No, the device utilizes internal phase compensation, allowing it to operate stably without an external load capacitor.

What is the function of the CE pin on the XC6503A series?

The CE pin allows the entire circuit to be turned off via a low-level input signal, enabling low-power standby mode.