TPS3779ADRYR

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Power Management Integrated Circuits (PMIC) are a type of integrated circuit that are used to control the way electricity is provided to different circuits in a device. PMICs provide a range of functions, including voltage regulation, on/off control, and power sequencing. The TPS3779ADRYR is an example of a PMIC from Texas Instruments, specifically from the line of supervisors. A supervisor is simply a circuit that supervises a power supply and provides support features such as programmable reset and power-good indication. The primary application for the TPS3779ADRYR is to provide power good indication, power on reset, and whatever else you might need to control the power supply in your particular application.

The TPS3779ADRYR is designed to monitor a power supply or main 3.3V rail, or an additional secondary supply (analog or digital). Its purpose is to provide a power-on reset and sequencing between the two main power rails and their associated peripherals. It has two separate power-on reset outputs, a main power rail and a secondary power rail that enable you to sequence the power-up sequence of any particular application. The TPS3779ADRYR can be programmed to assert the reset signals at any desired thresholds on either rail, enabling you to ensure that the different digital and analog components are powered up in the optimal sequence.

The TPS3779ADRYR includes a programmable power-good output that indicates the status of the power supply and its output voltages. It features a wide input voltage range of 2.5V to 6V, enabling it to be used in a variety of applications. It also offers an adjustable power-on reset delay of 120ms, which can be adjusted using either an external resistor or capacitor. The TPS3779ADRYR also features adjustable thresholds for reset and power-good signals, providing more flexibility for your application circuitry.

The TPS3779ADRYR is built on a standard 8-pin TSSOP (Thin-Shrink small outline package), and is relatively easy to implement in your application design. It features a very low quiescent current of only 13uA, ensuring that you won’t experience any unnecessary power drain. The device also features minimal power dissipation and some thermal shutdown circuitry for short-circuit protection.

The working principle of the TPS3779ADRYR is fairly straightforward. It monitors both the main 3.3V rail and any potential sub-supplies, and provides a power-on reset signal when the voltage level drops below a specific threshold. It also monitors the rail or sub-supplies and asserting a power good signal if the voltage is above a given threshold. It is designed to also take into account surge and inrush currents, as well as ensuring that the power-on reset signal is delayed appropriately to make sure that the system is stable when it powers back up.

Overall, the TPS3779ADRYR is a great choice if you are looking for a PMIC with the ability to monitor your main and sub-rails and provide programmable power-on reset and power-good signal capabilities. It offers low quiescent current, minimal power dissipation, and thermal overload protection to make sure that your system stays up and running. It is fairly easy to integrate into your application design and offers some great features for sequencing and monitoring power supplies.

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