TPS60502DGSRG4

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TPS60502DGSRG4 Application Field and Working Principle

The TPS60502DGSRG4 is a high-efficiency synchronous buck dc/dc converter with a voltage regulator. This device is an integrated solution for small form-factor, low-cost portable systems providing a regulated output voltage from 2V to 5.5V. The Buck dc/dc converter offers up to 95% efficiency over a wide input voltage range of 2.9V to 6V for typical applications. The device includes an adjustable output voltage function, a logic-enabled /enable logic goes low for entering shutdown mode, a-ok for normal operating mode and power-good flag. It uses synchronous rectifier architecture that further increases the overall efficiency. The device also offers a 5A high-current switching capability with a variable switching frequency up to 2MHz.

The TPS60502DGSRG4 is mainly used in portable designs where a high-efficiency dc/dc converter is needed. The device is also used in applications requiring output voltages between 2V and 5.5V. It is well-suited for computing and portable equipment such as smart phones, tablet PCs, digital cameras and portable media players.

Working Principle of TPS60502DGSRG4

The TPS60502DGSRG4 works on the principle of a synchronous buck regulator. It has an internal control circuit which regulates the output voltage at the regulated set value by controlling the gate drive of the Power MOSFET switch. The feedback voltage is increased or decreased by changing the soft-start capacitor and is maintained by the feedback loop.

To reduce voltage ripple, an external capacitor is connected to the output of the TPS60502DGSRG4. The output capacitor also serves as a reservoir capacitor between the power MOSFET and the load, which is useful in instances where the input voltage drops suddenly.

The TPS60502DGSRG4 is equipped with an enable pin, which when pulled low, will turn off the regulator and enter the shutdown mode. In this mode, the load current is reduced to a few microamps, resulting in considerable system power saving. The power-good flag will alert the host processor when the input voltage exceeds the lower threshold.

Conclusion

The TPS60502DGSRG4 is a high-efficiency synchronous buck dc/dc converter with a voltage regulator. It is an integrated solution for small form-factor, low-cost portable systems providing a regulated output voltage from 2V to 5.5V. The TPS60502DGSRG4 operates on the principle of synchronous buck regulator, with an internal control circuit that regulates the output voltage at the set value by controlling the gate drive of the switch. In addition, it has an enable pin, which when pulled low, will turn off the regulator and enter the shutdown mode. It is mainly used in portable designs and applications requiring output voltages between 2V to 5.5V.

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