TPS3828-33DBVTG4

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:	120 ms Minimum
Voltage - Threshold:	2.93V
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	SC-74A, SOT-753
Supplier Device Package:	SOT-23-5
Base Part Number:	TPS3828-33

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Introduction

PMIC (Power Management IC) is a type of integrated circuit (IC) designed to facilitate power management, usually within an electronic system. Supervisors are PMICs specifically for reset functions. Among them, TPS3828-33DBVTG4 is a low-cost supervisor IC for reset and power-on reset (POR) functions. It continuously monitors the voltage, from which the remaining power supply is derived and asserts a reset signal when the monitored power supply goes below the preset threshold voltage.

TPS3828-33DBVTG4 Features

TPS3828-33DBVTG4 is a dual POR supervisor IC from Texas Instruments that works from 2.7V ~ 5.5V. It offers a precision power supply monitor that warns of any power supply faults derived from either the system power supply or the battery. It also provides a reset signal while the voltage is below the preset threshold voltage, and a power-on reset signal after the voltage is above the threshold. TPS3828-33DBVTG4 also has a delay terminals, which provides protection before and after the time-delayed system start-up. It has a power supply voltage range of 2.7V to 5.5V, a highly accurate voltage monitoring threshold voltage with 0.5% tolerance and an adjustable reset timeout period. It also has UL recognized performance, which provides a high level of reliability on applications of 3.3 V, 2.5 V, 1.8 V and 1.5 V.

Applications of TPS3828-33DBVTG4

TPS3828-33DBVTG4 is suitable for a variety of applications, such as reset timer, system monitor and power supply monitor. It is specifically used for embedded systems and applications such as automotive, industrial and medical systems, where reliable reset and power-on reset is crucial.The TPS3828-33DBVTG4 can be used in many types of USB and other data ports, as it is designed to operate as an interface between USB ports and the system power supply. Additionally, it can be used in cellular phones, PDAs, portable electronic devices and instrumentation and test equipment to provide reliable reset and power-on reset functions.

Working Principle of TPS3828-33DBVTG4

The TPS3828-33DBVTG4’s main function is to provide reliable reset and power-on reset when the power supply voltage goes below the preset threshold voltage, it then asserts the reset signal, and when the voltage rises above the preset threshold, it asserts the power-on reset signal. The working principle for the reset signal is simple; the circuit monitors the input power supply voltage, and when this voltage goes below the preset voltage threshold, the signal output is asserted. The signal output then turns on the reset timer, which in turn delays the reset signal for a set period of time, allowing the circuit to finish its operations before resetting. The power-on reset signal is triggered when the voltage is above the threshold, the internal timer of the IC will be activated, the signal will be adjusted to the correct voltage supply and eventually the chip will assert the on-signal. As long as the input voltage remains above the threshold, the signal stays enabled until it is turned off by the user, usually with a reset/power button.

Conclusion

In conclusion, TPS3828-33DBVTG4 is a versatile power management IC designed to provide reliable reset and power-on reset. It is used in applications such as automotive, industrial and medical systems, as well as with USB ports to provide reset and power-on reset functions. Its working principle is fairly simple, where it monitors the input power supply voltage and triggers reset or power-on reset signals when the voltage goes above or below the preset threshold voltage.

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