ADM803RAKS-REEL7 Integrated Circuits (ICs)

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Type:	Simple Reset/Power-On Reset
Number of Voltages Monitored:	1
Output:	Open Drain or Open Collector
Reset:	Active Low
Reset Timeout:	140 ms Minimum
Voltage - Threshold:	2.63V
Operating Temperature:	-40°C ~ 125°C (TA)
Mounting Type:	Surface Mount
Package / Case:	SC-70, SOT-323
Supplier Device Package:	SC-70-3
Base Part Number:	ADM803

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Introduction

ADM803RAKS-REEL7 is a power management IC (PMIC) used for supervising and controlling system-level power functions. As part of PMIC - Supervisors, it performs tasks such as voltage monitoring and system reset. This article aims at explaining the application fields and the working principles of ADM803RAKS-REEL7.

Application Fields

ADM803RAKS-REEL7 is a comprehensive PMIC with integrated monitoring, reset, and control functions. It is an ideal choice for various consumer, mobile, and industrial applications such as Smartphones, wearables, Internet of Things (IoT) devices, cameras, and embedded systems.The integrated Reset signal of ADM803RAKS-REEL7 is specifically designed to reset the microprocessor or microcontroller. It is useful in situations where the system needs to be rebooted, e.g., when the microprocessor hangs or when device is powered-on.In addition, ADM803RAKS-REEL7 provides On/Off control for power-on-reset. It also provides voltage monitoring for microprocessor cores, as well as system reset signals for PCB protection in low power environments where the power supply voltage may drop below the operating voltage of the processor.Furthermore, the device provides digital I/O to extend the number of external inputs, multiple types of power sequencing, logic level conversions, and other application-specific logic operations.

Working Principle

The Reset signal sent by ADM803RAKS-REEL7 is generated in a two-stage process.At the first stage, a voltage sensing circuit is used to measure the supply voltage. If the sensed voltage goes below a certain preset threshold, the reset signal is generated. The preset threshold could be user-defined or could take pre-defined values. A reset trigger will be sent to reset the system when the voltage has reached the preset threshold.At the second stage, the reset signal is amplified using a differential amplifier. This amplified signal is then passed through logic gates to produce the final reset signal.Moreover, the dual voltage comparator of ADM803RAKS-REEL7 can be used to compare two digital levels, e.g., Vcc and Vrr. The comparison result is then sent to the multiplexer and the selection bits are set in order to select between the two digital levels.In addition, ADM803RAKS-REEL7 includes a low-voltage level shifter which can be used to shift the logic level of a digital signal between two different logic families. The transistor-based switch is used to control the level shifter and can be used to convert levels to either high or low.

Conclusion

ADM803RAKS-REEL7 is a comprehensive power management IC from PMIC - Supervisors family. It offers a wide range of applications, based on its integrated monitoring, reset, and control functions. Its reset signal is generated from a two-stage process, and a transistor-based switch is used to control the low-voltage level shifter. With its advanced features and overall performance, ADM803RAKS-REEL7 certainly stands out from the competition.

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