XC6901D43BMR-G

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

The XC6901D43BMR-G is a negative voltage CMOS regulator from Torex Semiconductor, designed for applications requiring stable negative power rails. It provides a fixed output voltage of -4.3V with a maximum output current capability of 200mA. The device operates within an input voltage range of -2.4V to -12.4V and features an ON/OFF control function via the CE pin. Key electrical characteristics include a typical supply current of 100μA and a stand-by current of 0.01μA. The component incorporates built-in protection circuits, including current limiting and thermal shutdown, ensuring reliable operation under various load conditions.

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

• Integrates an ON/OFF control function that enables stand-by mode and utilizes an internal auto-discharge switch to rapidly discharge the output capacitor when deactivated.
• Includes comprehensive protection mechanisms such as foldback current limiting and thermal shutdown to safeguard against overcurrent and overheating events.
• Features a soft-start circuit that minimizes inrush current during power-up, contributing to system stability and reduced stress on the input supply.

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

• Negative power supplies
• Wireless LAN modules
• Digital still cameras
• Mobile devices and terminals

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

Verify the specific ordering suffix MR-G corresponds to the SOT-25 package configuration required for your design. Confirm that the Type D designation aligns with your maximum operating temperature requirements, as this variant supports up to 85°C. Ensure compatibility with ceramic capacitors for both input and output stages as specified in the datasheet recommendations.

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

Select this component when a fixed negative voltage rail is needed with moderate current demands up to 200mA. The low stand-by current makes it suitable for battery-operated systems where power conservation is critical. Consider the dropout voltage characteristics relative to your minimum input voltage to ensure regulation is maintained across the full operating temperature range.

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

This part belongs to the XC6901 Series of negative voltage regulators manufactured by Torex Semiconductor. The series is characterized by its CMOS technology, which allows for low power consumption and high efficiency. The XC6901D43BMR-G specifically denotes the -4.3V output version packaged in SOT-25, offering a compact solution for space-constrained electronic designs.

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

Consult the official Torex Semiconductor datasheet for confirmed substitute part numbers within the XC6901 series or other compatible negative regulator families. Verify pinout compatibility and electrical specifications before substituting any alternative components to ensure circuit integrity.

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

How does the XC6901D43BMR-G handle output capacitor discharge?

When the CE pin is driven low, the internal auto-discharge switch activates, allowing the charge on the output capacitor to dissipate quickly through an internal resistor, pulling the -VOUT pin to the VSS level.

What protection features are integrated into this regulator?

The device includes current limit protection with foldback characteristics and a thermal shutdown circuit that automatically turns off the driver transistor if the junction temperature exceeds the safe limit, resuming operation upon cooling.