DS1818-5

Series:	EconoReset
Packaging:	Bulk
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:	100 ms Minimum
Voltage - Threshold:	3.06V
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Through Hole
Package / Case:	TO-226-3, TO-92-3 (TO-226AA)
Supplier Device Package:	TO-92-3
Base Part Number:	DS1818

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IntroductionPMIC (Power Management Integrated Circuits) are specialized microcontrollers with integrated switches, regulators and digital logic that are used to control and monitor the power supply of electronics. The DS1818-5 is one such PMIC Supervisors that serves to protect integrated circuits from hazardous conditions. The features of the device include: a reliable debounced reset with separate active-low and active-high reset signals, programmable reset assertion thresholds, an internal power monitoring comparator, active-low power-on reset and active-high power good reset outputs.Application FieldThe DS1818-5 is primarily used to monitor and protect a power supply system. It can be used in a wide range of applications including analog and digital systems, as well as mobile and industrial products. It is particularly useful in applications that require a reliable monotonic reset signal and programmable reset assertion thresholds.In analog and digital systems, the DS1818-5 can be used to monitor and protect against overvoltage, undervoltage, supply current, and POR (Power-On Reset) conditions. It is well suited to applications that contain several power supply rails, such as embedded video systems, DSPs and microcontrollers.The DS1818-5 can also be used in mobile and industrial products. It offers the ability to monitor voltage and current levels to protect batteries, motors, and other devices in the system. The power monitoring comparator can detect sudden changes in the system\'s power supply, such as a short or an overload.Working PrincipleThe DS1818-5 features an internal power monitoring comparator that compares the input voltage to a factory-programmed voltage threshold. When the voltage falls below the preset threshold, the device activates a reset signal. The reset signal can be active-low or active-high and is debounced for reliable operation.The device also features a programmable reset assertion threshold that allows the user to customize the reset signal for their application. The reset assertion threshold can be set to levels between 3 volts and 5.5 volts.The DS1818-5 also features a power-on reset (POR) with active-low reset output. When power is applied to the device, the active-low reset signal is asserted as long as the power good threshold is satisfied. This ensures that the system starts in a known state.ConclusionThe DS1818-5 is a PMIC Supervisors designed to protect integrated circuits from hazardous conditions. It features a reliable debounced reset signal and programmable reset assertion thresholds. It can be used in a wide range of analog and digital systems and mobile and industrial products. It is suitable for applications that require protection against overvoltage, undervoltage, supply current, and POR (Power-On Reset). The DS1818-5 is an efficient, cost-effective solution for system power management and protection.

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