LTC3862IFE-1

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The LTC3862IFE-1 is a DC-DC switching controller is well suited for multiple applications, thanks to its robust and easy-to-use design. It is a dual channel, synchronous, monolithic, step down DC/DC switching controller which can be used to drive two external N-channel power MOSFETs. It can provide a wide range of output voltages, from 0.5V to 5.5V and is ideal for powering high current, low voltage loads. It is suitable for wide input voltage range applications, from 3V to 20V, and high power density designs, up to 25A.

The LTC3862IFE-1 features an onboard digital architecture, providing precise and accurate output regulation of DC/DC converters. It integrates a digital PWM modulation option and a precise current limit with adjustable foldback for added protection. It also incorporates a built-in spread spectrum clocking to reduce EMI, boosting system performance and increasing EMC compliance. Furthermore, it includes built-in undervoltage lockout, overtemperature protection and current sense offset voltage compensation.

The operating principle of the LTC3862IFE-1 can be divided into two different stages. In the first stage, an internal oscillator and PWM controller are used to create an ac waveform, which is then used to drive the two external power MOSFETs. This waveform is also sent to a low dropout regulator, which regulates the duty factor for precise output voltage regulation. The second stage involves using the duty factor to control the output voltage. This is achieved by using an analog current-mode control loop, which modulates the duty factor in order to obtain a stable output voltage. This control loop also provides protection against over voltage, under voltage, and over current conditions.

The LTC3862IFE-1 has a wide range of applications, including industrial and consumer power supplies, automotive power systems, distributed power systems, and energy harvesting applications. Its features make it an ideal choice for powering low current, high voltage loads, and for wide input voltage range and high power density designs. The LTC3862IFE-1 is a low-cost, high performance controller that can be used to drive two external power MOSFETs, providing precise and accurate output regulation of DC/DC converters.

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