X4043M8IZ-2.7

Supervisors, also referred to as Power Management Integrated Circuits (PMICs), are important components in any integrated circuit design. They are used to monitor the system power conditions and protect circuits from overvoltage, undervoltage, and over-current conditions. The X4043M8IZ-2.7 is an integrated circuit (IC) supervisor for applications that require critical supervision in harsh environmental conditions and is part of STMicroelectronics\' industrial-grade protection portfolio. The X4043M8IZ-2.7 provides flexible, fault-tolerant supervision, monitoring power supply voltages, current rails, and temperature. In the event of out-of-bound conditions, it is capable of shutting down the system with a reset pulse to the system controller, thus providing a secure system reset. The product also features low quiescent current and reverse current protection.

The X4043M8IZ-2.7 supports general monitoring through its four supervised power supply inputs, each with an independent comparator and adjustable voltage thresholds. The voltages can be programmed between 1.08 V and 5.00 V, with two reset outputs, both triggered when any of eight On/Off faults are detected. In the event of any of these detected faults, the X4043M8IZ-2.7 can self-trigger a reset pulse to the system controller - either an STM32 MCU or ARM, for example. A built-in supervising timer can also be configured to autonomously detect a missing clock signal.

The X4043M8IZ-2.7 is designed to protect circuits from overvoltage, undervoltage and over-current conditions. To safeguard against overvoltage, the IC features two adjustable inputs, VIN1 (1.08V to 5.00V) and VIN2 (1.08V to 5.00V). Undervoltage protection is enabled through UVLO (Under Voltage Lock Out) thresholds on both input pins. It also shields against over-current conditions through the two high-sensitivity differential inputs that monitor the current-sense voltage. The outputs feature 200mA low-side protection, an Internal Supply Conduction (ISC) reset output and a system reset output.

In addition, the X4043M8IZ-2.7 is designed to be robust enough to survive harsh environmental conditions. It operates over a temperature range of -40 to +85°C and is provided in a robust non-conductive plastic TO-220 package. Its operating voltage is from 4.5 V to 18 V, with a wide range of supply voltage regimes compatibility. The device can be programmed via an I2C bus interface, enabling configuration of the fault-tolerant distribution network, programming of the faults, and setting of the On/Off thresholds. It also features an adjustable time delay for additional user-defined sequencing.

The X4043M8IZ-2.7 is a high-performance supervisor circuit that is suitable for industrial control, automotive and military applications. By providing Power System Management (PMS) functions, it enables control of the system power-up sequence and fault-tolerant distribution network. The X4043M8IZ-2.7 assists in monitoring the current level of all power source rails, providing protection against various conditions such as overvoltage, undervoltage and over-current. It can also be used to autonomously detect a missing clock signal in a fault-tolerant system and can self-trigger a reset pulse to the system controller.

Overall, the X4043M8IZ-2.7 is an IC supervisor for applications that require critical supervision in harsh environmental conditions. It is suitable for industrial, automotive and military applications and provides robust protection from various conditions such as overvoltage, undervoltage and over-current. With its adjustable time delay, the X4043M8IZ-2.7 also allows for additional user-defined sequencing.