XC6901D731ER-G

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

The XC6901D731ER-G is a negative voltage CMOS regulator from Torex Semiconductor, providing a fixed output of -7.3V with a maximum current of 200mA. It operates within an input voltage range of -2.4V to -12.4V and supports an ambient temperature range of -40°C to +85°C. The device features a low supply current of 100µA and includes ON/OFF control via the CE pin. Built-in protections include current limiting, thermal shutdown, and high-speed output capacitor discharge.

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

• Integrated ON/OFF control function for stand-by mode operation
• Built-in auto-discharge switch for rapid output capacitor discharge
• Fold-back current limit and thermal shutdown protection circuits
• Compatible with ceramic output capacitors due to internal phase compensation

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 suffix ER-G corresponds to the USP-6C package and reel quantity when ordering. Confirm that the Type D designation meets the required maximum operating temperature of 85°C for your application environment. Ensure compatibility with the active-high CE signal logic levels before integration.

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

Select this component for applications requiring a stable negative rail with low quiescent current. The fixed -7.3V output eliminates external resistor networks. Consider the USP-6C package size constraints and thermal dissipation requirements relative to the expected load current and input-output differential voltage.

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

This part belongs to the XC6901 series of 200mA negative voltage regulators. The 'D' type indicates a maximum operating temperature of 85°C, while the 'E' type extends to 105°C. The '731' code specifies the -7.3V output voltage setting within the series' available range.

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

XC6901D731MR-G (SOT-25 package)

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

How does the CE pin function affect the output voltage?

When the CE pin is at a low level or open, the regulator enters stand-by mode. An internal auto-discharge switch activates, rapidly discharging the output capacitor and pulling the -VOUT pin to the VSS level.

What is the purpose of the soft-start circuit in this regulator?

The soft-start circuit reduces the inrush current from the -VIN pin to the -VOUT pin during power-up, which helps stabilize the VIN supply line while charging the output capacitor.