BD45371G-TR

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BD45371G-TR Application Field & Working Principle

BD45371G-TR, a supervisor integrated circuit that works in the Power Management Integrated Circuits (PMIC), is a vital component for reset circuits in many kinds of electronic systems such as portable and embedded systems. It provides an external reset signal for circuits with different levels of operating voltage, and offers many other features including wide range of input voltage and temperature accuracy, power saving mode, signal output, and voltage detectors.

Application Field

BD45371G-TR is used in a range of applications, encompassing a variety of devices ranging from notebooks and personal computers to embedded systems, medical equipment, optical telecommunication systems and industrial control devices. It is an ideal choice especially for the control of resetting various kinds of digital systems, because it provides successful resetting when the power supply needs to be reinitialized after its on state has been changed due to sudden voltage disturbances. Moreover, it can also be employed on board in order to monitor the power stability. Thus it works as a significant miscellaneous reset controller in many kinds of electronic system applications.

Working Principle

The working principle of BD45371G-TR is based on monitoring the voltages of power supply by one or two of its two inputs, VDD or VBB, against the reference voltage level. This reference voltage level is the value of input voltage if it is between 0.9V and 1.8V. If an excessive variation in VDD and VBB input voltages is identified due to certain voltage disturbance(s) like voltage drop, overvoltage or power failing phenomena, the detector will turn on and send an external reset signal afterward. This reset signal goes out from the output pin of the BD45371G-TR to reset the target device. This way, the reset circuit communicates the detector’s operation results to the executable device. In addition, this circuit is available in other packages such as 45373, 45374G and 45375, allowing customers to select the package that suits their requirements.

The other features of BD45371G-TR also include a power saving mode, which enables reducing the power consumption while the system is in an idle or a standby state. This supervisor has several choice of output options, including low voltage clock, low power clock, push-pull type and open drain type. The other two is-input type and supply voltage observer- monitor the POWER DET and, depending the board size and design, these two options are selectable. Furthermore, its voltage detectors can be set to an accurate value by applying the external resistors to its Det pin. The desired voltage level and accuracy can be set with the following equation : VDET = 1/R*R1/R2.

In conclusion, BD45371G-TR can be featured as a universal high-performance reset controller given its wide range of advantages with regard to low power consumption, wide input voltage range, low temperature accuracy and various kinds of output types. In addition, the board designers can modify and set the voltages in the desired levels efficiently by using the external resistors mentioned above. All these features of the BD45371G-TR make it a useful and viable option for supervisors of power management integrated circuits.

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