BD45481G-TR

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PMIC supervisors are specialized ICs or chips used to monitor voltage for power-critical applications. The BD45481G-TR is a PMIC supervisor designed for power management systems. This supervising chip monitors the supply voltage, and if it falls below or rises above the predefined levels, the chip can either alert the system design or automatically initiate a switch-off condition, thereby improving system stability. In this discussion, we will look at the BD45481G-TR application field and working principle.

Application field

The BD45481G-TR is a power management supervisor IC used to monitor the power supply voltage. It is ideal for applications that require a low-power supervisor, such as embedded automotive systems. This high-accuracy supervisor is available in a supply voltage range of 2.6 V to 5.5 V, making it suitable for a wide range of applications. It is designed with package size of 5.1mm x 2.5mm, making it ideal for low-profile space-constrained designs.

Furthermore, the BD45481G-TR also features a wide variety of pre-defined voltage levels, making it suitable for a wide range of applications. It is designed with an ultra-low supply current of 20 μA, making it suitable for portable and battery-powered applications. It is also offered with an adjustable reset time, which allows for complex functions such as hysteretic operation, making it suitable for complex power management designs.

Working principle

The BD45481G-TR is a low-power PMIC supervisor IC that operates by monitoring the supply voltage of the system. It continuously monitors the supply voltage, and if it falls below or rises above the pre-defined levels, the chip can either alert the system design or automatically initiate a switch-off condition, thereby improving system stability. Furthermore, the supervisor\'s ultra-low quiescent current of just 20 μA makes it suitable for battery-powered applications.

When the supply voltage is above the pre-defined upper threshold (VthH) or falls below the lower threshold (VthL), a reset signal is activated. The reset pulse width can be set to multiple time intervals, and a hysteretic operation can also be be configured if needed. Furthermore, the chip is monolithic design and offers a built-in timer circuit that enables autonomous reset. The internal timer is configured to reset the chip at regular intervals, ensuring reliable system operation and preventing potential latch-up conditions.

Conclusion

The BD45481G-TR power management IC is a low-power supervised chip designed to monitor the system supply voltage for power-critical designs. It features a wide variety of pre-defined voltage levels, making it suitable for a wide range of applications. Additionally, its low quiescent current consumption is suitable for battery powered systems, and its adjustable reset time makes it suitable for complex applications. This chip can be used to ensure system stability and prevent potential latch-up conditions.

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