DS1810-5

Series:	EconoReset
Packaging:	Bulk
Part Status:	Obsolete
Type:	Simple Reset/Power-On Reset
Number of Voltages Monitored:	1
Output:	Push-Pull, Totem Pole
Reset:	Active Low
Reset Timeout:	100 ms Minimum
Voltage - Threshold:	4.62V
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:	DS1810

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IntroductionPMIC - Supervisors are used for providing the ability to monitor systems for various functions such as power sequencing, brown-outs, overtemperature detection, and automatic shutdown of systems. Supervisors allow the user to actively monitor the system for signs of failure and also keep track of internal parameters such as voltage, current, and temperature to ensure that the system is running in optimal conditions. DS1810-5 is a programmable supervisor with a wide range of features that provide a reliable and cost-effective solution for different application fields.OverviewDS1810-5 is a programmable supervisor IC with 10 pins in an 8-Pin SOIC package that is built on a TSMC 0.35µm CMOS process. The design is composed of two functional blocks – an adjustable, low-dropout voltage supervisor, and a programmable monitoring circuit and comparator. The supervisor portion is a high precision, adjustable voltage detector and operates in either monostable or multi-shot mode depending on the settings. It senses a voltage drop in the system and then sends a reset signal in response. The programmable monitoring circuit can be configured to trip at a specific threshold voltage, or alternatively, to monitor current consumption or temperature. It also features a power-on reset (POR) signal which is automatically generated when the device is powered up.DS1810-5 includes a watch-dog timer that can be configured to reset the system if certain conditions are not met within a certain amount of time. It also provides safety features such as brown-out, overtemperature and over-power protection. The device is capable of operating from an input voltage range of 2.5V to 5.5V and can generate reset signals from 0V up to the operating voltage. The device can also be used in systems that are powered by USB or battery supplies.ApplicationsDS1810-5 is ideal for a variety of applications such as industrial systems, consumer electronics, automotive and other applications requiring precise system control. It can be used to monitor and reset systems in cases of failures such as overvoltage, overtemperature, shorts, and other component failures. The device is also well suited for CPU monitoring and power sequencing applications. For example, it can be used to monitor and reset a microcontroller based system in case of a failure or when the system enters a state that requires resetting. It can also be used for protection in automotive applications, with built-in overvoltage, overtemperature, reverse battery and power sequencing protection. The adjustable and programmable nature of the device enables it to provide reliable system monitoring and reset functionalities in a wide range of applications.Working PrincipleThe DS1810-5 operates in two modes: monostable and multi-shot. In monostable mode, the device will monitor the input voltage and, when it reaches the user-programmed monitor threshold, the reset signal is generated. In multi-shot mode, the device will track the input voltage continuously and generates a reset signal whenever the input voltage falls below the monitor threshold.In addition to this, the device also provides a POR feature which is designed to reset the system when the device is powered up. The POR signal is held active until the device is powered up, and then it is released which causes an assertion of the reset signal.In order to provide reliable protection, the device also includes a power-on reset circuit which is designed to reset the system if no activity is detected within a certain amount of time (default is 180ms). If the system does not reset within this time window, the reset signal will be asserted.The device is also able to provide brown-out detection which detects a drop in input voltage and triggers a reset signal when the input voltage drops to or below the user-programmed monitor threshold. The overtemperature protection feature of DS1810-5 ensures that the system is automatically shut down if the temperature reaches a certain limit, thus preventing damages due to thermal runaway.ConclusionDS1810-5 is a useful supervisor device with a wide range of features and applications. It can be used to monitor, reset, and protect systems from thermal runaway, overvoltage, shorts, and other component failures. The device is well suited for both industrial and automotive applications, providing reliable protection of the system with its programmable functionalities.

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