BD9870FPS-E2

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The BD9870FPS-E2is a DC/DC switching regulator launched by ROHM Semiconductor. It is a high performance power supply IC with a maximum output voltage of 28V and a maximum output current of 1.5A with a small 9-pin SOP package.

The BD9870FPS-E2 is designed to provide regulated voltage to power core MCUs within a simple and efficient design. The IC features a peak currrent mode control system, excellent surge resistance and a highly efficient synchronous switching system. It includes built-in over current protection (OCP) which can protect against other malfunctions caused by excessive load. The IC also includes over current protection and a multi-loop (voltage/current) limitting function.

The BD9870FPS-E2 also include a soft start function. This provides a slow start of the power supply system, reducing current and voltage oscillations, providing improved stability when starting up the system and avoiding inrush current. The BD9870FPS-E2 can also switch between PFM and PWM control modes.

In PFM mode, the BD9870FPS-E2 uses an inductor in order to reduce avaerage switch current and ultimately reduce power consumption. In PWM mode, it uses a low on-resistance P-channel DMOS switch on the secondary side in order to reduce dropout voltage, provide improved efficiency and reduce power losses. The BD9870FPS-E2 also includes an internal soft start time select function which allows the user to select the optimal soft start time for their particular application.

The BD9870FPS-E2 is suitable for use in a variety of applications such as portable devices, industrial power supplies and automotive electronics. The maximum output voltage is 28V, making it well suited for automotive applications. It can also be used as an LCD bias power supply or DC/DC converter, as well as an auxiliary power adapter. The voltage regulator also offers fast transient response to sudden load changes.

Overall, the BD9870FPS-E2 is a high performance, highly efficient switching regulator ideal for use in automotive, industrial and portable applications. It features a wide output voltage range, fast transient response, adjustable soft start time and includes built-in protection functions for improved durability. The small 9-pin SOP package makes the device a cost effective choice for space-constrained designs.

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