TPS53625RSMT

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The TPS53625RSMT is an innovative voltage regulator designed for a variety of special purposes applications. This integrated circuit (IC) is highly customizable, enabling customers to tailor their power requirements to meet the needs of their current and future applications. Here, we’ll take a look at the TPS53625RSMT application field and working principle, providing an understanding of how this IC interfaces and functions.

TPS53625RSMT Application Field

The TPS53625RSMT belongs to the class of special purpose voltage regulators. It is a dual-channel synchronous buck switching regulator with input voltage of 4.5V to 14V and a wide output voltage range of 0.29V to 5V. This device requires an external sense resistor to enable current limit protection and allows customers to have a better control of their system current consumption. The TPS53625RSMT offers several features, such as internal power MOSFETs, current limit, reset, soft-start, enable, and adjustable switching frequency, making it suitable for many applications, including:

• Line Regulation
• General-Purpose Power Conversion
• Battery-Powered Applications
• Application Processor and DDR Memory Power Supplies
• Computer Mainboard Power Supplies
• Notebook and Industrial Automation

TPS53625RSMT Working Principle

The TPS53625RSMT is a synchronous buck switching regulators with an output current rating of up to 4A. The frame of the IC is divided into two synchronized control lines, with each output having its own control loop. The device works in a “pulse-width modulation” (PWM) mode where the duty cycle of the pulse controls the output voltage. The device has a high switching frequency which lower the size of the external input inductor and output capacitor.

The TPS53625RSMT uses two PWM controllers (switching) to manage the on/off cycles of its two outputs. Each output has its own PWM controller which manages the corresponding output current and voltage. The device works when the voltage threshold of the enable pin is exceeded. When enabled, each output is turned on according to its own PWM controller cycle.

The device’s output voltage is regulated by two internal voltage references, one for the upper output and one for the lower output. The device looks for a variation in the output voltage compared to its set voltage. The difference in the voltage across the feedback terminals is called the “error voltage.” This error voltage is then processed by the internal error amplifier, which compares it to the internal voltage reference on the corresponding output terminal. If the voltage across the feedback terminal exceeds the set voltage, the error amplifier will generate a “1” output. This in turn will reduce the duty cycle of the PWM control loop and reduce the output voltage until it reaches the set voltage.

Also, the TPS53625RSMT includes current limit protection that can be enabled. This is enabled through the connection of an external sense resistor prior to the current limit pin. This allows the user to set a maximum current limit for different scenarios. The device will monitor the sense resistor across the current limit input, and will reduce the output current when it reaches the set limit value.

The TPS53625RSMT also includes a reset signals, which will reset the device when a low voltage is provided. The reset signal can be used as a proactive way to deal with any unexpected events such as short circuits, overvoltages, or undervoltages.

Conclusion

The TPS53625RSMT is a versatile and innovative special purpose voltage regulator designed for a wide range of applications. Its features – such as internal power MOSFETs, current limit protection, reset, soft-start, enable and adjustable switching frequency – make it suitable for a variety of applications, including line regulation, general-purpose power conversion, battery-powered applications, and many more. This article provided a brief overview of the device’s application field and working principle and has hopefully provided the reader with a basic understanding of this powerful IC.

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