XC6503C351GR-G

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

The XC6503C351GR-G is a fixed-output low dropout regulator from Torex Semiconductor, providing a nominal output voltage of 3.5V with a maximum continuous current capability 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 incorporates a chip enable function controlled by a logic signal on the CE pin, allowing for power management through active or standby states. It includes built-in protection mechanisms such as current limiting, short-circuit protection, and thermal shutdown.

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

• Capable of maintaining stable output voltages without requiring an external load capacitor due to integrated internal phase compensation.
• Features a dedicated chip enable (CE) pin that allows the entire circuit to be turned off via a low-level input signal.
• Includes comprehensive protection circuits comprising a fold-back current limiter, short-circuit protection, and thermal shutdown functionality.

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

• Smart 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 matches the design requirements, as the XC6503 series is available in multiple configurations including USP-4, SOT-25, and SOT-89 variants. Confirm that the ordering suffix corresponds to the desired RoHS compliance and halogen-free status. Ensure the selected part number aligns with the required output voltage tolerance and the presence of the chip enable feature.

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

Select this component when a high-speed LDO regulator with a 500mA output capacity is needed for space-constrained designs. The internal phase compensation eliminates the need for external load capacitors, reducing board area. Consider the C-type designation specifically for its pull-down resistor on the CE pin, which prevents unstable operation if the control pin is left open.

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

This device belongs to the XC6503 series of CMOS LDO regulators manufactured by Torex Semiconductor. The series is characterized by its ability to operate stably without external output capacitors. The XC6503C variant specifically integrates a pull-down resistor on the chip enable pin to ensure defined logic states during idle conditions.

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

XC6503A351GR-G

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

What is the function of the pull-down resistor on the CE pin?

The XC6503C series includes a pull-down resistor on the chip enable pin to prevent unstable operation if the pin is left open; leaving it open will result in the IC stopping operation.

How does the device handle output discharge in standby mode?

When the CE pin is set to a low level, the IC enters standby mode, and the electric charge stored at the output capacitor is discharged through an internal switch, causing the output voltage to quickly return to the VSS level.