TPS3103H20DBVT

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:	65 ms Minimum
Voltage - Threshold:	1.84V
Operating Temperature:	-40°C ~ 85°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	SOT-23-6
Supplier Device Package:	SOT-23-6
Base Part Number:	TPS3103H20

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Application Field and Working Principle of TPS3103H20DBVT

PMIC - Supervisors are a type of integrated circuit device designed to assist in the control and protection of a wide variety of electronic systems. The Texas Instruments TPS3103H20DBVT is one such device suitable for several general-purpose applications, including digital power supply designs.This concise article hopes to provide a basic overview of the TPS3103H20DBVT and its real-world application field. In doing so, it also views the device’s basic features, typical circuit schematics, and principles of operation.

Overview

The TPS3103H20DBVT is a 3-terminal low-voltage supervisor IC that operates from a single 2.5V to 6V supply voltage. Its main function is the overvoltage protection of the system supply voltage to prevent damage or destruction due to faulty conditions.Its input can be connected to any power rail, and it will monitor the supply voltage continuously. If the voltage is ever outside the nominal range, the TPS3103H20DBVT will immediately assert a reset signal. This signal can be used to perform system-level cleanup or shut down procedures and thus protect the system from potential destruction.

Features

The TPS3103H20DBVT is designed to detect a variety of external conditions, such as an overvoltage or undershoot, and offer protection to the system’s power supply. It performs this task by monitoring the voltage on its input pin, which is typically connected to the system’s supply or ground.The TPS3103H20DBVT includes a wide operating temperature range from -40°C to +85°C. It also offers internal circuit protection and immunity against ground bounce and electrostatic discharge (ESD). Additionally, the device features a strong reset gate drive capability (nominally 80 mA source, 10 mA sink), low reset active threshold voltage (2.3 V typ), and low reset hysteresis (typ 0.04 V).

Circuit Schematic

The typical circuit schematic of the TPS3103H20DBVT when used as a supply voltage supervisor and monitor looks like the diagram below.In the above schematic, the TPS3103H20DBVT is connected between the power and ground rails of the system’s supply to monitor the input voltage and provide protection against overvoltage and undershoot conditions. The IC’s reset output is then connected to the system’s reset and clean-up circuitry, which serves to perform system-level clean-up and shut down procedures in case of a dangerous condition.

Working Principle

The working principle of the TPS3103H20DBVT is relatively straightforward. It monitors the input voltage at the input pin and compares it with the internal threshold voltage.If the voltage at the input pin is ever greater than the internal threshold voltage, the output will be asserted at a low level, which can be used as a reset signal to clean up the system or perform system-level shut down procedures.The reset timeout period is configurable and is typically set to around ten seconds. This means that the reset signal will be asserted for a period of ten seconds before the device is de-asserted and the input voltage monitoring process is restarted.

Conclusion

PMIC - Supervisors, such as the Texas Instruments TPS3103H20DBVT, are becoming an increasingly important component for digital power supply designs and other general-purpose applications. This article has provided a basic overview of the device, its features, typical circuit schematics, and working principle. Overall, the TPS3103H20DBVT is a low-voltage supervisor IC that is designed to offer overvoltage protection to the system supply voltage, safeguarding the system from potential destructive conditions. It monitors the input voltage continuously and if ever outside the nominal range, will immediately assert a reset signal.

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