XC6901D851MR-G

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

The XC6901D851MR-G is a negative voltage CMOS regulator from Torex Semiconductor, providing a fixed output of -8.5 V with a maximum current of 200 mA. It operates within an input voltage range of -2.4 V to -12.4 V and features a typical quiescent current of 100 μA. The device includes ON/OFF control via the CE pin, built-in auto-discharge for the output capacitor, and protection circuits for overcurrent and thermal shutdown. It is housed in a SOT-25-5 package.

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

• Integrated ON/OFF control function that enables stand-by mode and activates an internal auto-discharge switch to rapidly return the output to ground level.
• Built-in foldback current limit and thermal shutdown circuits protect against excessive load currents and overheating conditions.
• Capable of stable operation with low ESR ceramic capacitors due to integrated 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 MR-G corresponds to the SOT-25 package and reel packaging configuration. Confirm the 'D' designation aligns with the required maximum operating temperature of 85°C. Ensure the ordering code matches the exact -8.5 V output requirement before finalizing procurement.

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

Select this component when a fixed negative rail is required for portable electronics. The SOT-25 package suits space-constrained designs. Verify that the system's input voltage remains within the specified limits and that the load current does not exceed the 200 mA rating under all operating conditions.

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

This part belongs to the XC6901 Series of 200mA negative voltage regulators. The series offers various fixed output voltages and packages, including USP-6C and SOT-89-5. The D variant specifies a maximum operating temperature of 85°C, distinguishing it from the E variant which supports up to 105°C.

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

XC6901D851ER-G (USP-6C package)

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

How does the device handle output discharge when turned off?

When the CE pin receives a low-level signal, an internal P-channel MOSFET and discharge resistor activate to quickly discharge the output capacitor, returning the -VOUT pin to the VSS level.

What protection mechanisms are included?

The regulator includes a foldback current limit circuit to protect against short circuits and overload, as well as a thermal shutdown circuit that turns off the driver transistor if the junction temperature exceeds the limit.