LT1931ES5#TRPBF

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PMIC - Voltage Regulators - DC DC Switching Regulators

The LT1931ES5#TRPBF is a high power monolithic switching regulator. It is specifically designed to operate from a wide input voltage range of 4.5V to 18V, allowing it to be used in both step-down and step-up applications. The operating frequency of the device is adjustable from 100kHz to 500kHz, making it suitable for a variety of DC-to-DC solutions from 0.3A to 8A, depending on the package and layout. With continuous voltage and current sensing and a built-in Soft-Start, the LT1931ES5#TRPBF ensures accurate output voltage regulation and stability, making it an ideal choice for DC-DC converters.

Application field and working principle

The LT1931ES5#TRPBF is typically used in portable electronics equipment, telecom, automotive and industrial applications requiring a high power monolithic switching regulator with stable and high efficiency operation over a wide input and output voltage range. It can be used in step-down and step-up applications. Its high efficiency and operational range makes it ideal for powering embedded microprocessors and memory from 4.5V to 18V inputs with output voltages varying from 0.6V to 5V.

The LT1931ES5#TRPBF is designed for use with a multiple loop switching regulator topology. In such a topology, there are two or more control loops, each with its own distinct task. The inner loops, or control loops, control the switching frequency of the device and are regulated by a combination of internal and external components. The outer loop, or loop control strategy, regulates the duty cycle of the switching with feedback from an external voltage divider. This ensures that the output voltage remains constant, regardless of changes in the input and output voltages.

In addition to the two main control loops, the LT1931ES5#TRPBF integrates several other features to ensure superior performance. These include: soft-start, over-temperature protection, over-current protection, peak current mode control, frequency synchronization, short-circuit protection and under-voltage lockout. With its integrated features, this device can be used in both buck and boost modes, with adjustable output voltage and current levels, to ensure superior operational efficiency.

The LT1931ES5#TRPBF is an ideal device for use in industrial, automotive, aerospace and military applications, where reliability and performance are essential. With its adjustable frequency and current level, this device can be tailored to meet high power requirements while achieving optimal efficiency. As such, the LT1931ES5#TRPBF is a highly flexible and efficient DC-DC switching regulator, providing a cost-effective solution for a wide range of applications.

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