LTC3863IMSE#PBF

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The LTC3863IMSE#PBF is a current mode synchronous buck controller with an internal high side FET and synchronous rectifier, designed to regulate a wide range of voltages at output currents up to 10A. It is part of the 3863 family of devices, and is designed to provide low noise and fast transient response, while minimizing external component count. This device is ideal for a wide range of applications, including computing, networking, telecommunications, medical, and industrial.

Application Field

The LTC3863IMSE#PBF is a current mode synchronous buck controller designed to regulate a wide range of voltages at output currents up to 10A. It is ideal for a wide range of applications, including computing, networking, telecommunications, medical, and industrial. The device can control output current, output voltage, and temperature, allowing for efficient and stable power conversion. Additionally, the device features such features as spread spectrum mode, maximum duty cycle control, peak current limit, and adjustable soft-start.

For example, the device can be used in a variety of computing applications including servers, notebooks, and PCs. It is also suitable for telecommunications, networking, and medical applications. The LTC3863IMSE#PBF is an ideal choice for applications requiring high efficiency, small solution size, and wide current and voltage ranges--all under very tight regulation and transient response requirements.

Working Principle

The LTC3863IMSE#PBF uses current mode and synchronous control, allowing it to deliver high efficiency power conversion over a wide range of output voltages and loads. The device features an internal high side MOSFET, so there are few external components required and power efficiency is maximized. Additionally, the device has a very wide voltage range--from 6V to 50V--and can deliver up to 10A output current, making it suitable for a wide range of applications where high efficiency, small solution size, low noise, and fast transient response are required.

The device switches at a constant frequency, which is adjustable using an external resistor or using a pin on the device. The device also has an adjustable soft start feature, which allows for a slow ramp of the output voltage at start-up, minimizing input capacitance requirements. Additionally, the device can be put into a spread spectrum mode, minimizing EMI output from the device. Lastly, the device includes a maximum duty cycle limit which helps prevent the device from being over-driven, as well as a peak current limit for improved short-circuit protection.

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