X40411S8I-BT1 Integrated Circuits (ICs)

PMIC - Supervisors: X40411S8I-BT1 Application Field and Working Principle

Power management integrated circuits (PMIC) / supervisors are semiconductor devices that help stabilize voltage levels, monitor critical conditions and alert the system in case of a problem. They are a core component of embedded systems, providing the flexibility, safety and reliability required to meet the ever-changing needs of today’s applications.

The X40411S8I-BT1 from ON Semiconductor, which belongs to the X404-BT1 family, is a smart Power Management and System Management IC designed for intelligent systems with mixed-voltage, mixed-frequencies, and mixed-processors. It is available in a 7 x 7 mm 64-pitch body-bonded CSP package.

Application field

The X40411S8I-BT1 is suitable for industrial, consumer, digital home appliances and communication systems, such as consumer electronics (TVs, monitors, gaming consoles), home appliances, small office machines and automotive applications. It provides enhanced accuracy, low quiescent current, and robust system monitoring capability that make it an ideal power supervisor for these markets.

Working Principle

The X40411S8I-BT1 monitors the voltage of up to 4 power rails (V1, V2, V3 and V4) with ±80mV accuracy. It also supports a separate external temperature sensor (NTC or diode) for monitoring ambient temperature or other temperature sensitive elements. In addition, the PU/PD input pin can be connected to a digital switch such as a power button, allowing the device to be put in sleep mode for system power saving.

To protect the system from voltage overshoot and undershoot, the X40411S8I-BT1 can detect positive and negative voltage changes beyond the specified set points. In case of a voltage fault, the X40411S8I-BT1 will alert the system with an appropriate response. It will also actively control the system power through its PGOOD pin, by driving two on-chip low-side P-channel MOSFETs.

Limitations

The X40411S8I-BT1 has some limitations, much like any other PMIC / supervisor. It must be connected to a high resolution ADC in order to measure external temperature reliably, and it only supports 4 power rails. Furthermore, there is a restricted setup and configuration range for the input and output pin voltages.

Conclusion

The X40411S8I-BT1 from ON Semiconductor is a compact, reliable and cost-effective PMIC / supervisor that is suitable for industrial, consumer, and automotive applications. With its enhanced accuracy, low quiescent current and robust system-monitoring capabilities, it helps stabilize voltage levels and monitor critical conditions in order to protect the system from unexpected power events.