MAX695CWE

Power Management Interface Circuit (PMIC) is a unique set of integrated circuits that includes multiple power sources, regulators, supervisors, and other components, that help in regulating, controlling, and managing the power systems of electronic devices. Supervisors are one such component in PMIC, whose job is to monitor the working of all power sources, and take necessary action to protect them from overcharge, over-current, overvoltage, and other related conditions.

MAX695CWE application is a programmable supervisor IC from MAXIM Integrated. This supervisor IC helps in protecting the power supplies of electronic devices from various conditions like overcharge, over-current, overvoltage, over temperature, short-circuit, and more. This IC can be programmed to operate in an entire range of voltages up to 15V and perform functions like undervoltage, overvoltage reset/shutdown, low battery reset/shutdown, and more.

The working principle of MAX695CWE is fairly simple. This supervisor IC contains a voltage monitor unit, a watchdog timer, and a voltage detector. The voltage monitor unit contains a reference voltage generator, a comparator circuit, and a scaling prescale circuit. The reference voltage generator produces a user-programmable voltage, which is compared with the external supply voltage. The prescale circuit then measures any changes in the external supply voltage, and the watchdog timer starts. If the supply voltage exceeds the preset value, an undervoltage or overvoltage reset will be triggered.

The voltage detector unit performs the same function as the voltage monitor unit but with a few differences. Instead of a reference voltage, the voltage detector unit uses an open collector input that detects any USB supply port. This input can be programmed to detect any voltage ranging from 0V to 15V. When the voltage drops below a preset value, this unit will trigger an undervoltage reset or shutdown. Similarly, when the voltage increases beyond a certain preset value, an overvoltage reset or shutdown will be initiated.

MAX695CWE application can also be used for applications that require a manual reset of the power supply in the event of a failure. To ensure safety, the manual reset can be used in conjunction with the watch dog timer. In case of a long power outage, this watchdog timer will reset the system after a certain period of time. This effect can be achieved by connecting a capacitor to the watchdog timer output. Thus, this IC can help in protecting the system from any simultaneous occurrence of multiple malfunctions.

MAX695CWE application is most suitable for applications that require protection from various voltage and current related faults. This supervisor IC can be programmed to activate a reset or shutdown routine as soon as a power fault is detected. It also has a watchdog timer to perform a manual reset in the case of a prolonged power outage. Hence, this IC can be effectively used to protect the power supplies of different kinds of electronic devices.