RT7238BGQUF Integrated Circuits (ICs)

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The RT7238BGQUF is a high-efficiency, step-up DC-to-DC converter. It is capable of generating an output voltage up to 25V from an input voltage as low as 2.5V. The RT7238BGQUF provides excellent power conversion efficiency over a wide range of output currents. It also supports input voltage up to 13V without the need of an external booster circuit.

The RT7238BGQUF integrates two independent integrated power switches to provide enhanced flexibility. It also incorporates an output under-voltage (UV) reset circuit and an output over-voltage (OVP) protection circuit. The RT7238BGQUF is available in a QFN-24 package and can operate at switching frequencies up to 1MHz.

Application Fields

The RT7238BGQUF is ideal for wide range of applications, including power management in high-volume portable products, robotic systems, instrumentation, and many other electronic controllers or system accessories. The RT7238BGQUF is widely used in power management and RF encoding of electronic systems, such as keyboards, display backlights, speakers, home appliances, lighting, and many other power converters.

Working Principle

The RT7238BGQUF uses a buck-boost switching regulator circuit to convert an input voltage (VIN) to an output voltage (VOUT). The input voltage is applied to the power device’s MOSFET gate, which acts to switch the internal power MOSFET on and off. The output voltage is obtained by controlling the conduction and switching times of the power MOSFET. This allows the RT7238BGQUF to generate an output voltage, even when the input voltage is lower than the output voltage.

The RT7238BGQUF includes an under-voltage reset circuit that keeps the output voltage constant. If the input voltage drops below a specific threshold, the reset circuitry trips, which prevents the output voltage from dropping and also prevents incorrect system operation. The RT7238BGQUF also includes an over-voltage protection circuit that prevents the output voltage from exceeding a specific threshold. This protection circuit acts as a safety feature, protecting the device and any other components connected to it from over-voltage damage.

The RT7238BGQUF also includes a precision internal current limit. This protects the device from over-current events and improves efficiency, as the current limit will kick in and reduce the input power when the output power is no longer required. This current limit also helps reduce high-frequency noise.

The RT7238BGQUF features adjustable output voltages, wide range of output current up to 1A, and adjustable frequency up to 1MHz. The device also operates from -40C to +85C temperature range and is available in both Through-hole and Surface-mount packages.

The RT7238BGQUF is an excellent choice for cost-effective, efficient, and reliable step-up DC-to-DC converter solutions. It is an ideal solution for battery power management, back-up systems, and many other types of power-regulated devices.

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