TPS51211DSCR

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TPS51211DSCR is a synchronous DC-DC Buck switch-mode voltage regulator chip from Texas Instruments. It is designed for applications requiring high power conversion efficiency with fast transient response. It is suitable for powering the current generation of low-voltage microprocessors, application processors, gate arrays, FPGAs and other electronic devices.

TPS51211DSCR has a wide input voltage range of 2.3V to 17V and an output voltage of 0.6V to 6.5V. It is capable of delivering a maximum output current of 5A from a typical switching frequency of 1.2MHz. To ensure the maximum power efficiency, it provides an adjustable switching frequency of 400kHz to 2MHz as well as programmable soft-start/stop and slew rate for easy control.

It also features low-ripple, fast transient response, and low EMI for better system performance. When necessary, it can be used with external compensation components to improve stability and transient response. In addition, the chip has short-circuit protection, over-voltage protection, over-temperature protection and thermal shutdown for improved reliability.

In terms of application fields, TPS51211DSCR is suitable for ARM processors, FPGAs and other applications which require stable and efficient power supply. Examples include industrial control systems, embedded computing platforms, and automotive applications. It is also suitable for portable devices such as cellular phones, tablets, laptops and other consumer electronics.

The working principle of TPS51211DSCR is straightforward. Its main parts include a power switch, an inductor, a rectifier and a power circuit. During operation, the power switch is periodically turned on and off. In the on state, energy is supplied to the inductor and stored as an increasing current. In the off state, the energy is recovered from the inductor and sent to the rectifier. A control circuit is employed to regulate the switching of the power switch. The output voltage is regulated by comparing the voltage across the inductor with a reference voltage.

To sum up, TPS51211DSCR is a popular switch-mode voltage regulator from TI which features high efficiency, fast transient response and low EMI. It has wide input and output voltage range and is suitable for powering a variety of low-voltage devices, such as microprocessors, FPGAs and ARM processors. Its working principle is also straightforward, which utilizes a control circuit to switch the power switch and regulate the output voltage.

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