XC6503C39APR-G

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

The XC6503C39APR-G is a fixed-output low dropout regulator from Torex Semiconductor, providing a nominal output voltage of 3.9V with a maximum load current of 500mA. It operates within an input voltage range of 1.7V to 6.0V and features internal phase compensation for stable operation without external load capacitors. The device includes a chip enable function, pull-down resistor on the CE pin, and CL discharge capability. It offers ±1% output accuracy for voltages between 2.0V and 5.0V, with a typical supply current of 15μA and standby current of 0.01μA.

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

• Capacitor-less stability achieved through internal phase compensation
• Integrated chip enable control with built-in pull-down resistor
• Output capacitor auto-discharge circuit for rapid power-down
• Fold-back current limiting and thermal shutdown protection

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-89-5 and the -G suffix compliance against the official datasheet before procurement. Confirm that the C-series designation matches the required pull-down resistor and CL discharge functionality. Ensure the ordering code aligns exactly with the requested 3.9V output voltage increment.

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

Select this component when a fixed 3.9V rail is required with integrated shutdown control. The C-series variant is distinct due to its internal CE pull-down resistor and CL discharge feature. Verify that the application does not require the A-series open-pin behavior or the B/D-series different discharge characteristics.

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

This part belongs to the XC6503 series of CMOS LDO regulators designed for high-speed performance and low power consumption. The series covers various output voltages from 1.2V to 5.0V in precise increments. The XC6503C variant specifically integrates a pull-down resistor on the enable pin to prevent unstable operation when the pin is left open.

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

XC6503B39APR-G

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

What is the function of the CE pin pull-down resistor in the XC6503C series?

The XC6503C series includes a pull-down resistor on the CE pin to ensure the IC remains in the OFF state if the pin is left open, preventing unstable operation.

How does the XC6503C handle output capacitor discharge during standby?

When the CE pin is driven low, an internal N-channel transistor discharges the electric charge stored at the output capacitor (CL) through the CL auto-discharge resistance (RDCHG).