TPS51461RGET

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The TPS51461RGET, located in the PMIC – Voltage Regulators – DC DC Switching Regulators range, is a high efficiency, high voltage synchronous buck step-down voltage regulator. It is available in both through-hole and surface mount packages, giving the engineers an easier integration with both the old and new designs.

This device utilizes a state-of-the-art 3 rd generation synchronous buck controller to provide improved efficiency with superior line and load regulation, making it an ideal choice for high power microprocessor applications and for point of load (POL) power supply design.

Operating in the range of 8V to 36V, the TPS51461RGET is typified by wide range over-current protection (OCP) and over-temperature protection (OTP) to ensure that the system is able to accommodate high current while maintaining a very efficient power conversion. The device has also an extra option to enable full shutdown mode when no load is detected. This makes the device suitable for any application, where the user requires maximum system efficiency with an absolute minimum of power dissipation.

To improve the overall performance, the device also comes with programmable soft-start time and top-off current, which helps reduce the inrush current for effective hot soldering, as well as reduce the output voltage ripple level for noise sensitive applications.

The key features of the TPS51461RGET DC-DC switch regulator includes adjustable output voltage with ±4% accuracy, wide input voltage range from 8V to 36V, up to 95% power efficiency, programmable soft-start time and top-off current, low quiescent current to minimize no load power consumption, and an extra shutdown mode for power saving.

The TPS51461RGET is a very useful device for applications that require a wide input voltage range while providing a high efficiency output voltage. Examples of the applications in which the device can be used include, but not limited to, PLC nodes, consumer electronics, medical devices and portable electronic systems.

The working principle of the device is quite simple. The DC input voltage is connected to the regulator which switches on and off continuously internally, comparing the desired output voltage and the feedback voltage. During the switch-on phase, when the input voltage is higher than the feedback voltage, the output of the regulator will start to increase from zero voltage. Then the switch will be instantly turned-off when the feedback voltage reaches the desired output level. This process continues in a cycle and ensures that the output voltage is regulation within ±4% accuracy for precision applications.

The wall adopts a synchronous buck controller which works on the principle of the “Active Clamp Reset”. It reduces the on-time of the switch and therefore minimizes the power losses. This helps to reduce the temperature rise of the component and provides a very high efficiency in power conversion.

In short, the TPS51461RGET is an excellent choice for any applications requiring high input voltage with a high efficiency output voltage. The device provides an adjustable output voltage that helps to keep the output voltage steady for highly precise applications, however the light load power consumption needs to be looked at. Combined with self-protection such as OCP and OTP, this device offers a nice combination of efficient power conversion, excellent line regulation and load transient capability.

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