UC2903NG4

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PMIC stands for Power Management Integrated Circuit and their usage is widespread in everyday electronics. More advanced PMICs contain various protection circuits, system control and voltage conversion providing more autonomy and stability to power electronic devices. One popular PMIC, the UC2903NG4, is an interesting device that offers several features in its relatively small package.

The UC2903NG4 can be found in many common electronics including games consoles, tablets, laptops and home entertainment systems. It is a low power three-pin supervisor with a wide operating voltage range. It comes in 8-pin DIP, 8-pin SOIC and 8-pin SSOP packages, thus making it flexible for use in most applications.

The primary features of the UC2903NG4 are protection from low power supply conditions. It offers voltage regulation up to 6V and provides various circuit protection functions. It also has an internal watchdog timer that can be used to monitor system operations. The device also has an adjustable current limit of up to 260mA.

In operation, the UC2903NG4 works as a monitor and regulator of the power supply voltage. When the power supply falls below a preset voltage the supervisor is activated and the device’s internal circuitry is triggered. After a certain time the supervisor will then shut down the system,cut off power and reset itself ready for the next power on cycle.

The internal watchdog timer is used to monitor system operations. It has two operating modes, normal state and monitor state. In normal state the timer is reset periodically. When in monitor state the timer counts down from the preset value. If the timer expires the supervisor will then shut down the system,cut off power and reset itself ready for the next power on cycle.

The UC2903NG4 also has adjustable current limit up to 260mA. This feature is beneficial when the system is powered from a battery or other small power sources. When the power draw reaches or exceeds the set current limit, the device will cut off the current and shut down the system.

The UC2903NG4 is a great supervisor solution for almost any power supply application. It is capable of providing multiple levels of protection and its adjustable current limit helps to conserve power. In addition, its relatively small package makes it suitable for use in many devices where space is limited.

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