LTC3815IUFE#TRPBF

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LTC3815IUFE#TRPBF is a synchronous, current-mode step-down switching regulator IC offered by Linear Technology Corporation (LTC).This DC/DC regulator offers a wide range of applications, such as USB power and LED lighting, AC adapters, and 5V or 12V embedded point-of-load voltage regulation. Basically, the LTC3815IUFE#TRPBF is a robust and reliable DC/DC switching regulator that offers excellent efficiency and fast transient response.

Application Field

The LTC3815IUFE#TRPBF is a current-mode step-down DC/DC switching regulator that is capable of generating a regulated output voltage between 0.7V and 3.6V from a 4.25V to 18V input. It is ideal for powering a wide variety of applications, such as USB power, AC adapters, and LEDs.

The LTC3815IUFE#TRPBF is a robust, highly-efficient DC/DC switching regulator that offers high operating temperature and fast transient response making it ideal for powering multi-chip systems with varying supply voltage requirements. It features integrated power switching elements, soft start, and input under-voltage protection. This IC is also capable of operating in both continuous and discontinuous conduction modes.

The maximum output current of the LTC3815IUFE#TRPBF is 3A, while the output voltage can be adjusted using an external resistor divider. This makes it suitable for many applications, such as USB power and LED lighting, power supplies for micropower systems, and point-of-load voltage regulation.

Working Principle

The LTC3815IUFE#TRPBF is a buck-type DC/DC switching regulator that operates in current-mode control. It utilizes an internal power switch along with a high-compensation, fast-transient-response voltage loop to regulate the output voltage over a wide range of input voltage, output voltage, and load current conditions.

In order to operate the LTC3815IUFE#TRPBF, an external MOSFET is needed along with the supply voltage, output voltage, and load current. The internal power switch is then driven by an internal clock, which is synchronized with the external MOSFET gate driver input. The voltage loop senses the difference between the actual output voltage and the reference voltage and drives the power switch via a current comparator. As a result, the output voltage is regulated and kept stable.

The LTC3815IUFE#TRPBF features programmable current limit, over-voltage protection, under-voltage protection, and thermal shutdown, making it a reliable and robust solution for many applications. It can also be configured for either continuous or discontinuous operation to achieve high efficiency across a wide range of load conditions.

Conclusion

The LTC3815IUFE#TRPBF is a robust and reliable synchronous, current-mode step-down DC/DC switching regulator IC ideal for powering USB power, LED lighting, AC adapters, and point-of-load voltage regulation. It features integrated power switching elements, soft start, input under-voltage protection, over-voltage protection, thermal shutdown, programmable current limit, and can be configured for either continuous or discontinuous operation. This makes the LTC3815IUFE#TRPBF a highly efficient and reliable DC/DC switching regulator for many applications.

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