CAT1640LI-25-G

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Power supply management is one of the most important and strategic components to guarantee the normal operation of the circuit. CAT1640LI-25-G is a power management integrated circuit (PMIC), widely applied in supervising the power performance of the system by providing one fixed reset output pin. It dectects the power supply status of the power supplies and maintains the system in good performance. This article will discuss in detail the application fields and working principles of CAT1640LI-25-G.

Application fields of CAT1640LI-25-G

CAT1640LI-25-G, as a PMIC, is a versatile supervisory circuit designed for use in supply, power sequencers and power blocks. It can supervise supplies from 1.2V to 5.5V and is suitable for monitoring a variety of system power rails, including Vcc-for low cost, low power and space-constrained applications.

Other application fields of CAT1640LI-25-G include motor control applications-the internal circuits of the device can be used to monitor and control the motor chips, giving the system faster and more accurate motor control ability; Low voltage sensing; Power switch sequencing; and PMICs supporting Active mode. CAT1640LI-25-G also supports over-voltage, under-voltage, inverse current, and open/short pin conditions.

Working Principles of CAT1640LI-25-G

CAT1640LI-25-G has excellent performances with minimum supply current consumption. It operates very much like a supervisory circuit that provides a fixed reset output pin in the event of a problem with the power supply of the system. Its detect and reset circuit is composed of a band-gap voltage reference, comparator, and controllable reset circuit. It compares the monitored voltage with its reference voltage to detect the present power status, i.e whether the power system is working properly or not. If the comparison result is beyond the preset threshold (over/under voltage condition), the reset output of the device will be triggered or set, thus resetting the system in order to protect the system.

Moreover, CAT1640LI-25-G provides selectable reset timer starts to 2.5/5/10/20/30/50 ms. This feature allows the supported circuit to have more flexibility in responding times. For instance, if the monitored voltage is higher than expected for longer than a preset time span, the reset output will be set, the system will be reset, and the user can set different time ranges for different applications depending on the purpose of the circuit. Also, reset timeout status of the device can be monitored by system processors.

In conclusion, CAT1640LI-25-G is one of the popular power management integrated circuit (PMIC) devices that are widely used for supervising the power performance of a system. It can be applied in various fields such as motor control, power switch sequencing, PMICs supporting active mode and low voltage sensing. It works in a very useful way by comparing the supervising voltage with its reference voltage to detect the power status of the system and will trigger the reset output if the comparison result is beyond the preset threshold. Furthermore, it provides selectable reset timer starts to 2.5/5/10/20/30/50 ms, allowing supported circuit to have more flexibility in responding times.

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