TPS54622RHLR

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Introduction to TPS54622RHLR

TPS54622RHLR is a step-down DC/DC switching regulator with a wide variety of features, making it suitable for many high-performance applications. It provides accurate current, voltage and power regulation, and can efficiently convert a wide input voltage range of 2.5V to 12V into an adjustable and regulated output voltage from 0.6V to 5.5V. This voltage regulator is especially well-suited for next-generation computer systems, mobile communication devices, digital audio/video equipment and automotive electronics that require extreme performance parameters.

TPS54622RHLR offers features including integrated high accuracy Internal Digital Error Amplifiers (IDEA), Spread Spectrum Frequency Modulation (FFM) to reduce noise, High Performance Power System (HPPS) to improve efficiency, and low quiescent current. It also features fast response time and high power density, making it an ideal choice for a variety of applications.

Applications

The TPS54622RHLR is ideally suited for mobile applications, such as laptops, cell phones, tablets, and other portable devices, which often require high power demands but operate on limited input power sources. As such, the regulator needs to step down the input voltage to a regulated output voltage at high efficiency.

In addition, the TPS54622RHLR can be used in many other microprocessor-based systems where low voltages and high current levels are required. Its high power density and small footprint make it suitable for both mobile and industrial applications, such as agricultural machinery, medical devices, home appliances, and lighting control systems.

Working Principle

The TPS54622RHLR is a high efficiency, high power step-down DC/DC switching voltage regulator designed to provide a regulated output voltage from 0.6V to 5.5V to an input voltage of 2.5V to 12V. It incorporates a pair of high-voltage MOSFETs and a low-voltage MOSFET to control the output voltage and provide high efficiency while reducing the complexity of the power management design. The MOSFETs are controlled by a patented internal error amplifier, whose output is monitored and compared to an externally supplied reference voltage.

When the output voltage falls below the reference voltage, an Internal Digital Error Amplifier (IDEA) turns on the high-voltage MOSFET switches, initiating a step-down conversion process. The output voltage is then regulated to an accurate value by the feedback loop and regulated by an on-chip voltage loop. The step-down conversion process is regulated by two pulse width modulation (PWM) signals, one for the high-voltage MOSFETs and one for the low-voltage MOSFET.

The TPS54622RHLR also features a low-quiescent current mode that is enabled when the input voltage is below the regulated output voltage. This mode effectively stops MOSFET switching and allows the operating current to remain low, resulting in increased efficiency during light load conditions.

To further improve the efficiency of the switching regulator, the TPS54622RHLR incorporates a Spread Spectrum Frequency Modulation (SSFM) feature, which reduces electrical noise. This feature automatically varies the switching frequency in an effort to reduce the output voltage ripple voltage and improve efficiency.

In addition, the TPS54622RHLR has a built-in high-performance Power System (HPPS) to ensure high efficiency and enhanced transient performance. This system uses both a synchronous buck and a buck-boost topology to ensure optimal efficiency across a wide range of load conditions and input voltages.

Conclusion

The TPS54622RHLR is a high efficiency, highly integrated step-down DC/DC switching voltage regulator with low quiescent current and low EMI emission. It is an ideal choice for high power applications, such as in computer systems and mobile devices, and is suitable for a wide range of industrial and automotive applications as well.

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