LP3470IM5X-4.38/NOPB

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Power management integrated circuits (PMIC) are devices that are used in the electronic system designing and development. One type of PMIC are supervisors, which are useful in providing power supply monitoring circuit protection. In this article, we will be discussing the application field and working principle of the LP3470IM5X-4.38/NOPB supervisor.

LP3470IM5X-4.38/NOPB Application Field

The LP3470IM5X-4.38/NOPB supervisor is used in various applications in the consumer, industrial and computing fields. It can be used to monitor and protect the power supply of battery powered or wall powered designs. It is optimized for robust power supply sequences for battery charger, start-up, normal operation and system shutdown. This supervisor is also suitable for other power management controls and microprocessor/microcontroller power-on reset functions.

The LP3470IM5X-4.38/NOPB supervisor is suitable for products that require low power standby solutions because it consumes only 37nA quiescent current operating at 4.38V. It has a wide operating voltage range from 2.9V to 7V, making it suitable for portable applications. This supervisor also provides full protection against over current, over voltage and under voltage conditions.

LP3470IM5X-4.38/NOPB Working Principle

The LP3470IM5X-4.38/NOPB supervisor is a voltage-mode power supply protection device designed to monitor and protect battery- or wall-powered designs. It integrates a power FET, an adjustable low current threshold with an input voltage supervisor, an adjustable high current threshold with an input sense transistor, and an OVERVOLTAGE protection circuit.

The LP3470IM5X-4.38/NOPB supervisor operates in two modes: voltage mode and current mode. In voltage mode, the supervisor actively monitors the input voltage. When the voltage exceeds a preset level, the supervisor will trip by turning off the power FET. In current mode, the supervisor actively monitors current draw on the input. When the current draw exceeds a preset level, the supervisor will trip by turning off the power FET.

The device features a reset function that is triggered when the input voltage falls below a predetermined level. This will reset the power FET and allow the system to resume normal operation. The device also automatically triggers a low delay reset signal when the input overvoltage level is reached.

The LP3470IM5X-4.38/NOPB supervisor provides an additional power-on reset (POR) which is triggered when the input voltage reaches a predetermined level. The reset delay of the LP3470IM5X-4.38/NOPB is typically in the range of 100 ms to 30 seconds.

The LP3470IM5X-4.38/NOPB supervisor offers multiple window comparators to protect against input overvoltage, undervoltage, and overcurrent. These window comparators are programmable and allow for a preset input voltage range, overcurrent threshold level, de-glitch period, POR level and reset delay.

Conclusion

The LP3470IM5X-4.38/NOPB supervisor is an excellent choice for power management applications in consumer, industrial and computing fields. It is suitable for product designs that require low power standby solutions. This supervisor is robust and offers full protection against overcurrent, overvoltage and undervoltage conditions. It also has multiple window comparators for customizable power management.

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