TPS54040ADGQR

Power Management Integrated Circuits (PSICs) are a type of integrated circuit (IC) used in devices to manage electric power systems. They are responsible for supplying, controlling and monitoring electric power along with voltage and current requirements to the other circuits of the devices. One such type of PSIC, DC DC Switching Regulator, is used to convert one DC voltage to another to obtain the desired voltage value. The TPS54040ADGQR is one such DC DC Switching Regulator that provides improved switching performance while consuming less power in comparison to the traditional non-switching devices.

The TPS54040ADGQR belongs to the family of PSICs that are used to convert one DC voltage to another DC voltage of desired value, usually higher or lower than the supplied DC voltage. It is specially designed for point-of-load (POL) voltage regulation in a wide range of applications such as Enterprise networking, Wireless Infrastructure equipment and IoT applications.

The device is based on the Buck regulator topology and features a high-frequency, current mode architecture that yields fast transient response, superior line/load regulation and low-noise performance. It supports wide input voltage range of 4.5 V to 28 V as well as output voltage accuracy of ±1.2%. The output current rating is 5.5A with a maximum output power of 70W.

The TPS54040ADGQR has a few different modes which determines its operation. In the high-frequency operation mode the chip regulates the output voltage by driving the power stage with a high-frequency, variable duty-cycle pulse-width modulation (PWM) signal. This helps in avoiding the large output capacitors, whereas in pulse-skipping mode the switching frequency is reduced to reduce the noise during light load condition and thereby conserving power.

The device features two internal high-speed sense FETs that deliver high-performance and superior load response. It has a wide operating temperature range from -40°C to 125°C and is externally adjustable with external resistors. It also has an adjustable soft start/soft stop control which aids in quickly ramping up or ramping down the output voltage during start-up or over-current situations respectively.

Overall, the TPS54040ADGQR is an efficient and robust preprogrammed controller with the flexibility for varying the output voltage that provides improved switching performance and low on-resistance. It is ideal for applications such as Enterprise networking, Wireless Infrastructure equipment and IoT devices due its wide input voltage range, high current rating and robust design.