XC6901D131ER-G

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

The XC6901D131ER-G is a negative voltage CMOS regulator from the XC6901 series, manufactured by Torex Semiconductor Ltd. It provides a fixed output of -1.3V with a maximum output current of 200mA. The device operates within an input voltage range of -2.4V to -12.4V (with VCE=3.6V). Key electrical characteristics include a dropout voltage of 400mV at 100mA output and high accuracy of ±0.03V for outputs ≥-2.0V. It features a CE pin for active-high control, enabling stand-by mode with ultra-low power consumption of 0.01μA. The unit includes built-in protection circuits such as current limit, foldback short-circuit protection, and thermal shutdown at 150°C. It is housed in a USP-6C package.

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

• Integrated ON/OFF control via CE pin with internal pull-down resistor and auto-discharge switch for rapid output capacitor discharge.
• Built-in phase compensation allows stable operation with low ESR ceramic capacitors without external components.
• Includes soft-start function to minimize inrush current during power-up and ensure VIN stability.
• Comprehensive protection mechanisms including current limiting, foldback short-circuit protection, and thermal shutdown with automatic recovery.

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 confirms the USP-6C package type and Halogen/Antimony-free compliance. Ensure the 'D' designation matches the required operating temperature range of up to 85°C. Confirm that the system design accommodates the negative polarity requirements and that input/output capacitor values meet the minimum recommendations for phase stability. Cross-reference the part number against the latest manufacturer datasheet to confirm availability and any potential revisions.

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

Select this component when a fixed negative rail is required with minimal external circuitry. The USP-6C package offers a compact footprint suitable for space-constrained mobile applications. Consider the 200mA current capability and the specific -1.3V output level. The active-high CE control interface simplifies integration with standard logic levels. Evaluate the thermal performance based on the expected power dissipation and ambient temperature conditions.

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

This part belongs to the XC6901 Series of negative voltage regulators. The series is designed for portable electronic devices requiring efficient negative voltage generation. The 'D' variant specifies an operating temperature range up to 85°C, while the 'E' variant extends to 105°C. The 'ER-G' suffix indicates the USP-6C plastic package and environmental compliance. This series integrates reference voltage sources, error amplifiers, and driver transistors into a single CMOS chip.

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

Direct substitutes within the same series include XC6901E131ER-G for extended temperature range or XC6901D131MR-G for SOT-25 packaging. Verify pin compatibility and electrical specifications before substitution.

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 left 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 GND level.

What protection features are included in the XC6901D131ER-G?

The device includes over-current protection, foldback short-circuit protection, and thermal shutdown. Thermal shutdown occurs at 150°C and automatically recovers when the junction temperature drops to 125°C.

Is external compensation required for stability?

No, the XC6901 series has a built-in phase compensator, allowing it to operate stably with low ESR ceramic capacitors without additional external compensation components.