TPS79318DBVR Datasheet/PDFTPS79318DBVR belongs to Linear Voltage Regulators family of the Power Management Integrated Circuit (PMIC). Generally they are devices which allow simultaneous reliable regulation of a large number of different output voltages. This device however, is suitable for use in Advanced Telecom and Computing Architecture (ATCA) systems; hence, resolving input voltage change issues in these systems.
TPS79318DBVR is a synchronous step-down DC to DC voltage regulator, with input voltage range from 4.5V to 15V, and with a 3.3V fixed output voltage. It has a 0.75MHz switching frequency, meaning that it is capable of providing 3A output current. Additionally, it has an internal compensation network and requires no external components. It also has simple 1-pin PMBus/I2C interface for communications, so that the output voltage can be adjusted using simple commands.
The working principle of TPS79318DBVR is similar to any other voltage regulator in the same family of PMICs. The input voltage flows through an internal switch, the sense resistor and the output inductor, and is then outputted to an internal feedback capacitor. When the input voltage is high enough, the switch turns on, which, in turn, pumps it through the sense resistor, which is responsible for the current, then out of the inductor. The inductor blocks the direct current flow, allowing only AC to pass through, thus reducing the voltage.
The output voltage is then regulated by the internal feedback capacitor, which is responsible for changing the amount of current flowing through it in order to maintain a constant output voltage. When the output voltage is too low, the capacitor lowers its impedance and allows more current to flow through, thus increasing the output voltage. On the other hand, when the output voltage is too high, the capacitor increases its impedance and allows less current to flow through, thereby reducing the output voltage.
TPS79318DBVR has wide applications, primarily in Advanced Telecom and Computing architecture (ATCA) systems. It is also used in data center applications, network application processors and customer premise equipment, as it is capable of providing reliable regulation of a large number of different output voltages. Due to its higher efficiency and robustness, it is ideal for use in high-performance systems.
In conclusion, TPS79318DBVR is a highly efficient and robust synchronous step-down DC to DC voltage regulator, suitable for use in ATCA systems, data center applications and customer premise equipment. This device has input voltage range from 4.5V to 15V, and with a 3.3V fixed output voltage, and 0.75MHz switching frequency, allowing it to provide up to 3A output current. It also has an internal compensation network and a simple 1-pin PMBus/I2C interface for communications, making it the best choice for various applications.