TPS3809J25QDBVRQ1

Series:	Automotive, AEC-Q100
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Type:	Simple Reset/Power-On Reset
Number of Voltages Monitored:	1
Output:	Push-Pull, Totem Pole
Reset:	Active Low
Reset Timeout:	120 ms Minimum
Voltage - Threshold:	2.25V
Operating Temperature:	-40°C ~ 125°C (TA)
Mounting Type:	Surface Mount
Package / Case:	TO-236-3, SC-59, SOT-23-3
Supplier Device Package:	SOT-23-3
Base Part Number:	TPS3809

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Introduction

PMIC - Supervisors, or voltage supervisors, are integrated circuits that are used to detect a low-volt supply or an over-volt condition, and provide a reset signal as an external output. This detected condition can be used to power down a system or a peripheral. The Texas Instruments TPS3809J25QDBVRQ1 is a low power supervisor with a broad range of reset voltage thresholds that are highly programmable.

Features

The TPS3809J25QDBVRQ1 has a variety of features that make it ideal for many applications. These features include: - A wide operating voltage range of 1.2V to 5.5V.- An adjustable reset assertion voltage that ranges from 1.none to 5.1V, in addition to a power-on reset threshold with a fixed 2.1V reset voltage.- An adjustable reset de-assertion voltage that ranges from 0.98 to 4.25V.- An input delay of 600ns for the active-high reset output.- The ability to control the option of open drain or push-pull reset output.- Both active low and active high reset options.- A hysteresis threshold of 50mV for the reset output.- Anabsolute maximum operating temperature of 125C.- An output voltage monitor with a reset assertion voltage range of 1.31 to 5.02V with an adjustable window.- An open drain software reset output.

Applications

The TPS3809J25QDBVRQ1 is suited for a variety of applications that have an active low or active high reset output, such as computer or peripheral monitoring and control. Other applications include embedded systems, test and measurement, industrial control and automotive systems. The adjustable reset voltage thresholds, flexible reset outputs and temperature range make it well suited for high temperature, industrial and automotive applications.

Working Principle

The TPS3809J25QDBVRQ1 functions by monitoring the voltage at its VDD pin. If the voltage drops below the programmed reset threshold, the integrated circuit will assert a reset signal. This reset signal is an active low or active high reset output depending on the programming. The reset delay is adjustable based on the amount of current being drawn from the RESET_DELAY pin. The reset signal can also be configured to drive either an open drain or push-pull reset output.The voltage monitor feature allows for the reset to be triggered if the voltage at the MON pin is outside the programmed window. The hysteresis feature ensures that a stable reset output is provided, which prevents the output from chattering and allows the reset to remain asserted until the power is truly stable.The open drain software reset output allows the supervisor to be reset without a power cycle. This can be used to protect against soft errors where the circuit may malfunction, but the voltage is still stable.

Conclusion

The TPS3809J25QDBVRQ1 is a versatile and low-power voltage supervisor that is well-suited for a variety of applications. Its adjustable reset voltage threshold, flexible reset outputs, temperature range and additional features, such as the open drain software reset, make the TPS3809J25QDBVRQ1 a great choice for many embedded systems.

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