BU45K254G-TL Integrated Circuits (ICs)

PMIC - Supervisors is a type of electronic component, usually encapsulated in an integrated circuit (IC), which is responsible for monitoring a power supply, detecting over- and under-voltage conditions, and ensuring valid power range. BU45K254G-TL is a quad-channel supervisor IC, designed for embedded microcontroller-based systems that have a requirement of safety and great power efficiency. It can support up to four monitored rails, with selectable monitoring threshold voltages between 1.25 V and 3.5 V.

The working principle of BU45K254G-TL is rooted in the programmable voltage-detection circuitry included in the IC. This circuitry monitors the voltage level for each of the rails independently, signaling an over- or under-voltage state when the monitored level crosses a preset threshold. When an under-voltage condition is detected, the voltage-detection low (UVLO) output of the IC is activated, disabling the outputs of the power supply and protecting the system from unreliable power. Similarly, when an over-voltage condition is detected, the voltage-detection high (OVLO) output is activated, disabling or limiting the output of the power supply. The monitored voltages, the hysteresis settings and the delay times can be programmed externally by the user.

The BU45K254G-TL is especially well-suited for safety-critical applications and comes with a wide range of features to ensure reliable operation. It can protect the system from out-of-tolerance conditions, such as power-on reset, brownout reset and over-temperature reset. The IC also features an internal watchdog timer, which is used to verify that the microcontroller is running correctly. Furthermore, the IC comes with a number of hardware security features, such as a hardware lock, which prevents unauthorized firmware updates.

BU45K254G-TL finds applications in a variety of safety-critical embedded systems. It is well-suited for automotive, industrial, and medical systems, due to its robust design and ability to protect the system from over-voltage and under-voltage conditions. The IC can also be used in home electronics applications, such as TVs or microwaves, to ensure reliable and safe operation.

In summary, BU45K254G-TL is a quad-channel supervisor IC, designed for embedded microcontroller-based systems. It is well-suited for safety-critical applications, as it can protect the system from unreliable power and out-of-tolerance conditions. Its applications include automotive, industrial, medical and home electronics systems.