TPS3779DDBVR

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PMIC (Power Management Integrated Circuit) supervisors are an important part of a system\'s power management system, playing a vital role in system power sequencing and sequencing power-up and power-down. As a supervisor, the TPS3779DDBVR, manufactured by Texas Instruments Inc., is a common choice for robust power effectiveness. It offers features, such as a programmable reset/power-on input and a precision low-voltage reset option, that enable the device to be used in autonomous systems in various application fields with enhanced reliability.

The TPS3779DDBVR has a wide range of application areas, including networking and communications systems such as switches and routers, by providing a stable and reliable reset indicator against system level power-supply noise, as well as industrial and consumer applications such as server motherboards and embedded devices. In addition, it finds different applications in distributed and local power systems, automotive power systems, LED lighting systems and compliance monitoring in various markets.

The TPS3779DDBVR incorporates 4- and 5-V tolerant inputs, allowing it to be used with low-voltage and high-voltage power-supplies, such as those from vehicle alternators, battery-operated systems, or those typical in the industrial sector. The TPS3779DDBVR also offers complete control of the power and reset circuitry, providing the ability to programme the reset/power-on input voltage, timeout and delay, and adjust brown-out thresholds. This ensures that autonomous systems are more reliable and the load is protected even when power sequencing purposes require the equipment to be powered up and down continuously.

This device works by measuring core and I/O power-supply voltages and generating an active-low reset signal when the total power-supply voltage drops below the factory or system-programmed threshold. The TPS3779DDBVR also features a precision one-cycle low-voltage-detection reset at VDDSA and a low-voltage detector for use in corner-case scenarios. The device is also capable of power sequencing by providing an adjustable power-on delay and reset timeout delay.

In addition, the TPS3779DDBVR has an internal 120K resistor connected between VDDINT_VLOGIC and VDDIO, which increases voltage noise acceptance through the diagnosis of I/O voltage. It also has an internal n-channel MOSFET as the core power switch, plus a zener diode and precision voltage reference that together program the reset/power-on input voltage. The TPS3779DDBVR supervisor includes a push-pull output that drives an external reset signal to the system modules, thus providing a reliable source of reset signal against system level power-supply noise.

The TPS3779DDBVR provides superior power sequencing and signal protection for autonomous systems. It has wide application areas, its reset signal support core and I/O power-supply voltage measurements, and it is accessible through an adjustable reset/power-on input, threshold detectors and built-in reset delay. The device also has an integrated push-pull output that drives an external reset signal, allowing it to be used in a wide range of system configurations.

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