TPS54140DGQR

TPS54140DGQR Application Field and Working Principle

The TPS54140DGQR is a monolithic integrated circuit (IC) designed for a synchronous buck voltage regulator, which is used in power management applications. This device is designed to provide two main voltage rails (1.8V and 3.3V) with a 0.6V differential between them to accommodate the power requirements of digital systems.

The TPS54140DGQR is categorized as PMIC - Voltage Regulators - DC DC Switching Regulators. This type of regulator is capable of providing a stable output voltage with high efficiency for Vdd/Vcc supply rails. It features included features such as over voltage, under voltage protection, output current foldback, soft start and over temperature protection. It is capable of delivering up to 8A output current with excellent transient response.

Working Principle

The working principle of a synchronous buck voltage regulator is fairly simple and it uses the concept of switching to provide regulation. The fundamental components within the voltage regulator are a switching transistor and an inductor. The switching element(s) are used to control the inductor current, while the inductor is used to store and transfer energy. The IC operates at a fixed frequency and keeps monitoring the voltage at the output and adjusts the duty cycle of the switching element accordingly. As the duty cycle changes, the inductor current varies in order to achieve a regulated output voltage.

The TPS54140DGQR voltage regulator uses two internal power switches. One switches the input voltage Vin to the inductor while the other switches the output voltage node to regulate the output voltage Vout. The two power switches are driven by the internally generated clock signals and switching off is done via a fixed-frequency peak current-mode control.

The TPS54140DGQR has an internal over-voltage protection (OVP) circuit, which is used to protect the device from output overvoltage conditions. The OVP circuit compares the output voltage with the OVP threshold voltage, and if it detects that the output voltage has exceeded the OVP threshold, the device provides a signal to the internal logic circuitry to turn off the power switches and protect the device from damage.

Applications

The TSP54140DGQR is designed for a wide range of applications, including power management in digital systems, automotive electronics, mobile phones, wireless communication, and personal computers. It is also suitable for LCD monitors, digital cameras, game consoles and other handheld and portable electronics. It provides clean, reliable and efficient power to the devices, while also providing protection against overvoltages and other potential hazards.

The TPS54140DGQR is a high-performance voltage regulator, which is designed to provide a cost-effective solution for power management applications. It is capable of delivering up to 8A of output current and provides excellent transient response, making it an ideal solution for applications where performance, reliability and cost are key factors.