RT9818A-20GV

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	Simple Reset/Power-On Reset
Number of Voltages Monitored:	1
Output:	Open Drain or Open Collector
Reset:	Active Low
Reset Timeout:	0 ms Typical
Voltage - Threshold:	2V
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	TO-236-3, SC-59, SOT-23-3
Supplier Device Package:	SOT-23-3

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Introduction to RT9818A-20GV

The RT9818A-20GV is a PMIC supervisor belonging to Richtek’s Supervisory device family. It is a comprehensive power management IC (PMIC) for use in computer applications. It can provide overvoltage protection, battery monitoring, reverse current protection, and other features important for system security and instability prevention. In addition, Richtek\'s supervisor ICs have excellent noise immunity and low power consumption.

Application Fields of RT9818A-20GV

RT9818A-20GV PMIC Supervisors are widely used in computers, laptops and peripherals such as tablets, cell phones, and LAN equipment. This device can help prevent system instability, thus extending product life. Specifically, this supervisor IC works to protect computers, peripherals and other products from overvoltage. It also provides reverse current protection by limiting inrush current into PCs and peripheral devices during power up. The RT9818A-20GV can reduce system power consumption due to its low current operation. In addition, its low quiescent current and high noise immunity operating voltage make it suitable for use on battery-powered or resource-constrained systems.

Working Principle of RT9818A-20GV

The RT9818A-20GV Supervisory IC is composed of two functional sections. The first section is a comparator circuit with a fixed reference voltage. The reference voltage of the comparator is supplied by an independent band gap reference circuit. When the system voltage exceeds the set threshold, the comparator circuit will generate an output pulse to reset the voltage regulator, thereby protecting the system from overvoltage.The second section of the supervisor IC comprises of a detection circuit and a protection circuit. The detection circuit ensures that the regulator output voltage remains within the accepted range. If the output voltage drops below the set threshold, the protection circuit will restart the voltage regulator to reset it to the correct working level. Furthermore, the RT9818A-20GV supervisor IC is equipped with a battery monitoring circuit with adjustable thresholds. When the battery voltage is within the acceptable range, the voltage regulator will remain on, but when it drops below the set threshold, the output regulator will be turned off. This prevents over-discharging of the battery and prevents any potential damage to the system.

Features of RT9818A-20GV

The features of Richtek\'s RT9818A-20GV Supervisory IC make it an ideal solution for any computer application. Its low current operating and low quiescent current draw make it energy efficient and reduce the system power consumption. The adjustable battery monitoring thresholds provide precise control over the output voltage and the adjustable over voltage protection ensures a safe operation. In addition, the device has a high noise immunity of 5V, which allows it to operate in noisy environments. This makes it ideal for use on laptops, cell phones and other portable devices. Finally, the supervisor IC features an extended temperature range, which allows it to be used in even the harshest of environments.

Conclusion

Richtek\'s RT9818A-20GV Supervisor IC is the perfect solution for protecting computers and peripherals from overvoltage and providing reverse current protection. It has a low current operating, low quiescent current, adjustable detection and protection thresholds, and high noise immunity. These features make it suitable for use in any application, from battery-powered to resource-constrained systems.

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