LM5117QPMHX/NOPB

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The LM5117QPMHX/NOPB is a dc/dc switching regulator controller capable of delivering high power with fast transient response and superior thermal performance. It is specifically designed to support single-inductor buck-boost topologies and is ideal for point-of-load and distributed power supply architectures. This integrated circuit (IC) is a low power controller that offers an efficient, cost-effective solution for voltage and current regulator applications. The LM5117QPMHX/NOPB is a robust solution for automotive, industrial, medical, datacenter and other high-current applications (up to 6A). It features fast transient response, low quiescent current, wide regulation range, excellent thermal and surge performance, adjustable current limiting, and separate probe outputs.

The LM5117QPMHX/NOPB is built with a versatile architecture, allowing the user to support one to four output voltage rails in single or multiple configurations. The low switching frequency also allows integration of a synchronous rectifier solution for enhanced efficiency. In addition, the quasi-resonant output allows for a reduced solution size, lowering the bill of materials cost.

The LM5117QPMHX/NOPB primary application field is for DC-DC switching controllers. Due to its exterior and low power consumption, the device is suitable for applications with distributed power and limited space. This device can be used for a number of different applications, including motor drives and lighting control, or in a variety of automotive applications.

The LM5117QPMHX/NOPB consists of two independent bias control circuits. The first circuit is a precision two-pole voltage reference, which is used to provide a stable logic supply voltage to the control circuits. The second circuit is a voltage-controlled oscillator (VCO), which uses the precision reference to generate an accurate clock frequency. This frequency is then used to drive a series of logic circuits, which in turn control various aspects of the ICs operation.

In addition to the two independent bias control circuits, the LM5117QPMHX/NOPB control logic includes a start-up circuit, a soft-start circuit, a driver circuit, and a comparator circuit. During power-up, the start-up circuit is used to ensure that the supply voltage is within the operating range. Once the start-up circuit confirms that the supply voltage is within the specified range, the soft-start circuit is activated and the driver circuit is used to control the output voltage of the IC. The driver circuit monitors the output voltage and can be programmed to actuate the appropriate response if the output voltage deviates from the desired voltage setpoint. The comparator circuit is used to control the current sensing circuit, which will regulate the output current of the IC.

The LM5117QPMHX/NOPB features a wide range of features, allowing it to be tailored to suit a variety of applications. The device uses a highly advanced digital power control algorithm, allowing the output voltage to be accurately regulated while minimizing power dissipation. Additionally, the device features an adjustable current limit, allowing it to be used in applications that require more precise current regulation. Finally, the LM5117QPMHX/NOPB includes separate on-chip BCM control logic for each output, providing improved precision control for multiple-output applications.

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