TPS3839G12DBZR

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PMIC - Supervisors

VPower Supervision, or VPS, is a sub-category of power management ICs, or PMIC. PMIC deals with all sorts of power control and monitoring tasks, such as the management of MCUs, FPGAs, and system-level power management. VPS, however, focuses more at the mid-level power, between the microcontroller and the power supplies. In other words, VPS chips provide stable power to the main MCU/FPGA, while allowing them to constantly monitor their own power, or that of other parts of the system. This makes them ideal for embedded systems, where reliability and long-term stability are of utmost importance.

The TPS3839G12DBZR

The TPS3839G12DBZR is a specialized VPS supervisor from Texas Instruments. The chip is offered in a small 3 mm X 3mm package, and is divided into two sections. The first is a low-dropout (LDO) voltage regulator, typically used with a single external resistor, and providing up to 250 mA of current. The second is a power-on/power-off supervisor integrated circuit, capable of detecting voltage drops and rising levels, so that the main MCU/FPGA can be power-cycled on demand. The TPS3839G12DBZR is ideal for embedded systems, especially those requiring low power, long battery autonomy, and high system reliability.

Application Field

The TPS3839G12DBZR can be used in a variety of applications, ranging from small embedded systems to large industrial process controllers. It is particularly well-suited to automotive applications, where low power and high reliability are required. It can be used as a voltage supervisor for a variety of subsystems, from safety-critical ECUs to power management controllers. It can also be used to monitor the input voltage of a microcontroller, or a logic IC, allowing it to shut off their power supply in case of a voltage drop.

Working principle

The working principle of the TPS3839G12DBZR is relatively simple. The chip consists of a low-dropout voltage regulator section, and a power-on/power-off supervisor section. The LDO portion of the chip receives an input voltage, and applies a fixed output voltage, with a single external resistor. The power-on/off supervisor monitors the input voltage, and responds to both rising and falling voltage levels. In case of a voltage drop, the output of the supervisor will shut off, thus cutting off the power to the microcontroller or FPGA.

The TPS3839G12DBZR is also a very versatile chip. It can be programmed to respond to a variety of input and output conditions, such as temperature, current, and more. It can also be used in a wide variety of applications, from automotive, to industrial, and embedded systems.

Conclusion

The TPS3839G12DBZR is an excellent special-purpose VPS supervisor, capable of providing low-dropout voltage regulation, and reliable power-on/power-off supervision. It is ideal for embedded systems, automotive, and industrial applications where high reliability and long-term stability are of utmost importance.

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