LTC3811EG#TRPBF

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LTC3811EG#TRPBF Application Field and Working Principle

LTC3811EG#TRPBF is a switching controller integrated circuit from the DC/DC switching controllers class of analog integrated circuits from Linear Technology. It is a sophisticated controller that keeps the output voltage and current of a power supply within a desired and predetermined range. The device helps minimize system cost by allowing the design of power supplies and converters that reduce the number of components and thereby reduce the size and cost.

Function and Working Principle

The LTC3811EG#TRPBF operates as a synchronous buck pulse-width modulator (PWM). This structure offers higher efficiency than a simple buck converter by adding a second power stage to the power conversion process. During the switching cycle, the device internally alternates between the inputs and outputs of two switches FETs. This process results in better utilization of available power capacity and higher efficiency conversion.

The LTC3811EG#TRPBF performs a single conversion from a DC input source to a DC output. The IC can be programmed for a fixed switching frequency or an autotune mode with fully programmable parameters. It can also be programmed for pre-regulation versus full output regulation, which provides higher efficiency. Inbuilt protection features keep the system safe from common failures caused by over-load, over-voltage, under-voltage, and over-temperature.

Application Field

The LTC3811EG#TRPBF is used in a wide range of applications, including point-of-load power converters, DC-to-DC converters, buck regulators, automotive bridge supplies, and auxiliary supplies. It can be used as an AC/DC buck power supply, providing power to CPUs and ASICs in a variety of consumer electronics such as laptops and tablets. Additionally, it can be used in power supply designs that require board space saving and low parts count, such as consumer appliances, blade servers, and telecom systems.

Any power supply design that requires high efficiency, wide output range, pre-regulation or full output regulation, and automatic voltage or current regulation, or all of the above, can benefit from using the LTC3811EG#TRPBF. The device is also suitable for applications where low cost and minimal design effort is of utmost importance and AC/DC power supplies that require input ranges of 36 V to 72 V.

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