S-80128BLPF-JENTFG Integrated Circuits (ICs)

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A PMIC (Power Management Integrated Circuit) supervises and regulates the power flow in a system. The S-80128BLPF-JENTFG is a specialized monolithic IC used in specific systems as well as for other general-purpose applications. The device has two functions: a low side switching regulator and a supervisor circuit. In this article, the application field and working principle of the S-80128BLPF-JENTFG will be discussed.

Application Field

The S-80128BLPF-JENTFG is mainly used in applications that require a low side switching regulator and a supervisor circuit. Examples of such applications include automotive systems, LCD monitors, set top boxes, and other types of electronic equipment. Additionally, the device can be used in applications that require a low quiescent current load switch. The load switch requires up to 1 Amp of load current and can switch from 0V to 70V. The device is capable of working in an extended temperature range from -40°C to 125°C.

Working Principle

The S-80128BLPF-JENTFG consists of two main components: a low side switching regulator and a supervisor circuit. The low side switching regulator is used to regulate the power supply voltage, while the supervisor circuit monitors the system to make sure the power supply is within acceptable limits. The low side switching regulator consists of a sense resistor, which is used to sense the current passing through it, and an error amplifier, which compares the sensed current to a reference voltage, and generates an error signal. The output of the error amplifier is used to control the low side switch.

The supervisor circuit is used to monitor the power supply for over-voltage and under-voltage conditions. The supervisor consists of an over-voltage comparator, an under-voltage comparator, and a reset timer. The over-voltage comparator monitors the power supply for over-voltage conditions, and the under-voltage comparator monitors the power supply for under-voltage conditions. When either condition is detected, the reset timer is triggered, and a reset signal is generated. The reset signal is used to reset the system and prevent damage caused by over-voltage or under-voltage conditions.

In addition, the S-80128BLPF-JENTFG also contains a power-on reset (POR), a watchdog timer (WDT), and a watchdog reset (WTR) circuit. The power-on reset circuit is triggered when the voltage is below a certain level and generates a reset signal to initialize the system when power is applied. The watchdog timer monitors the system to detect any system lockup conditions, and, when detected, generates a reset signal. The watchdog reset circuit is used to reset the system if the watchdog timer fails to detect any system lockup condition.

Conclusion

The S-80128BLPF-JENTFG is a specialized monolithic IC used in specific systems as well as for other general-purpose applications. The device has two main components: a low side switching regulator and a supervisor circuit. The low side switching regulator is used to regulate the power supply voltage, while the supervisor circuit monitors the power supply for over-voltage and under-voltage conditions. Additionally, the device also features a power-on reset, a watchdog timer and a watchdog reset circuit. Overall, the S-80128BLPF-JENTFG is an ideal device for applications that require a low side switching regulator and a supervisor circuit.

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