TPS54625PWPR

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The recently released TPS54625PWPR is part of the family of DC DC switching regulators from Texas Instruments that offer excellent power management solutions. This step-down Pulse Width Modulation (PWM) voltage regulator uses advanced architectures to deliver high system efficiency in a wide range of applications. Its integrated 14-bit DAC adds the flexibility to support a variety of input and output voltages. Here, we discuss the application field and working principle of the TPS54625PWPR.

Application Field

The ultra-low quiescent current, load-dependent enable/disable operation and an internal pull-up enable switch of the TPS54625PWPR are ideal for battery-powered applications. The controller also has local compensation, allowing for at least 4V of differential output voltage range. It is therefore ideal for power supply applications such as TVs, LCDs, notebook PCs and other battery-powered systems.

The TPS54625PWPR is a point-of-load regulator that can be used in a wide range of applications. It offers a variety of features such as adjustable power up/down sequencing for up to two outputs, over-temperature protection and over-voltage protection. It also offers balanced output current sharing for parallel loads and programmable soft-start time. The regulator can support up to 12A of continuous output current and up to 20A of peak output current, making it ideal for high-power applications.

Working Principle

The TPS54625PWPR operates as a voltage regulator by converting an input voltage to a regulated output voltage. It uses a constant-frequency, current-mode PWM system to regulate the output voltage. The regulation loop consists of an error amplifier, a PWM comparator and a voltage reference. When the output voltage falls below the set value, the error amplifier generates a difference that is greater than the reference voltage. The resultant voltage is fed to the PWM comparator, which compares it with the oscillator voltage. When the difference between these two voltages is greater than zero, the output of the PWM comparator becomes high, activating the P-MOSFET that turns on, allowing current to flow through the inductor. The current then flows to the load, while the output capacitor stores the energy.

When the voltage across the capacitor reaches the set point, the output of the PWM comparator goes low. This turns off the P-MOSFET, stopping the current flow. The inductor releases the energy stored in it as the current decays, causing the capacitor to discharge, maintaining the output voltage at the desired level. The output voltage is set using the integrated 14-bit DAC. An internal voltage reference is also included, allowing for an accuracy of 0.5%. The quiescent current of the TPS54625PWPR is as low as 6.5μA, making it ideal for battery-powered systems.

Conclusion

The TPS54625PWPR is an excellent DC DC switching regulator designed for battery-powered applications. Its integrated 14-bit DAC adds the flexibility to support a variety of input and output voltages, while its low quiescent current and load-dependent enable/disable operation make it ideal for battery-powered systems. It also offers a variety of features such as adjustable power up/down sequencing, over-temperature protection, over-voltage protection and balanced output current sharing. Finally, it uses constant frequency, current-mode PWM to regulate the output voltage, making it a great choice for high-power applications.

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