TPS6208818YFPT

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TPS6208818YFPT is a monolithic broad voltage range synchronous buck regulator with an operating input voltage range of 3.5 V to 40 V and an output voltage range of 0.45 V to 24 V. It has a high efficiency buck regulator. TPS6208818YFPT can deliver up to 5A continuous output current. It has an integrated internal high side and low side Power MOSFETs to reduce footprint area.

Applications of TPS6208818YFPT

TPS6208818YFPT are suitable for various applications such as telecom base station, PC server main board, Gaming PC/Laptop, IoT devices and other high-end applications that require a wide input voltage range, low quiescent current and low output voltage ripple. It is specifically designed for applications which are demanding high power density and high efficiency.

Working Principle of TPS6208818YFPT

TPS6208818YFPT is based on a synchronous buck topology. The voltage regulator includes an internal high side and low side power MOSFETs. When the input voltage is above the output voltage, the two power MOSFETs are used as a switch in series to regulate the output voltage. The feedback voltage is compared with a built-in reference voltage (1.244V) by a voltage error amplifier to determine the duty cycle of the MOSFET to sustain the output voltage. The compensation network of the voltage error amplifier is used to optimize loop stability by achieving the desired phase margin and the output impedance of the regulator.

The TPS6208818YFPT also includes a low quiescent current PFM (Pulse frequency modulation) mode. When the load current is below the minimum current threshold (Ith), the power MOSFETs will be turned off by the PFM controller to reduce the quiescent current.

In down mode (when input voltage is below the output voltage), the bidirectional diode connected to the output pin will become active to prevent output voltage from dropping down. This also helps to ensure that no external diode is needed in the application.

Conclusion

TPS6208818YFPT is a monolithic synchronous buck regulator with a wide input voltage range of 3.5 V to 40 V and a wide output voltage range of 0.45 V to 24 V. It is suitable for various applications, such as telecom base station, PC server main board, Gaming PC/Laptop and IoT devices. The operating principle is based on a synchronous buck topology with an integrated internal high side and low side power MOSFETs as a switch in series to regulate the output voltage.

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