LT1376IS8#TRPBF

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DC-DC switching regulators, also known as DC-DC converters, are widely used component of power management systems that either boost or buck the input source in order to produce a precise output voltage or current. Such regulators are employed in a variety of applications, ranging from automotive, aircraft, industrial, and communications systems to chargers, computers, and medical equipment. The LT1376IS8#TRPBF is a synchronous step-down DC-DC switching regulator that possesses a wide range of application prospects. This paper discusses the application field and working principle of the LT1376IS8#TRPBF.

Application Field

The LT1376IS8#TRPBF is an efficient and robust 28V, 1.5A synchronous step-down regulator. Its compact size, low quiescent current, and accurate output current regulation make it an ideal choice for power management in high current applications. The device is suitable for a variety of input sources, including 4V to 30V wall adaptors, battery power, and automotive systems. It presents excellent solution for the Point of Load (POL) applications, such as FPGA, memory and I/O core power.

In general, the LT1376IS8#TRPBF is capable of accepting an input voltage of up to 28V with a conversion efficiency typically up to 96%. Moreover, its switching current is up to 1.5A. It has a high accuracy of ±1.5% over line, load and temperature (+/-250ppm/°C). This ensures stable and reliable output power in a wide range of applications.

Working Principle

The LT1376IS8#TRPBF works on a buck-assistedpulsed-width modulation (PWM) control topology, which integrates a N-Channel MOSFET for power switching operation. It also consists of two switching transistors, one for controlling the input voltage and the other for controlling the output voltage. It is a synchronous step-down DC-DC converter, which successfully synchronizes the PWM frequency to the input voltage with the help of wide input capacitor range.

In its operation, an oscillator generates a triangle wave which overlaps a sawtooth wave. When the triangle wave on the oscillator is below the sawtooth wave, the output is low. When the triangle wave is above the sawtooth wave, the output is high. The sawtooth is then able to charge the input capacitor, and when the voltage on the capacitor reaches a certain level, the output transistors are turned on, and the load is supplied with the required voltage and current. This process continues in a repetitive cycle until the correct output is achieved.

In conclusion, the LT1376IS8#TRPBF is a synchronous step-down DC-DC switching regulator which offers high efficiency and excellent stability in a wide spectrum of applications, ranging from automotive, aircraft, industrial, and communications systems to chargers, computers, and medical equipment. It works on a buck-assisted PWM control topology which successfully synchronizes the PWM frequency to the input voltage with the help of wide input capacitor range. Moreover, it has an input voltage of up to 28V, with a conversion efficiency typically up to 96%, and switching current of up to 1.5A, providing accurate and reliable output power.

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