LT3990IMSE#PBF

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The LT3990IMSE#PBF is a high-voltage DC/DC switching regulator that provides high efficiency and high voltage step-up (boost) conversions. It offers an operating input range of 8V to 32V, enabling it to power very wide range of inputs. The LT3990IMSE#PBF can generate a regulated output voltage of up to 65V, making it ideal for stepped-up (elevated) applications.

Application Fields

The LT3990IMSE#PBF is designed for a wide range of applications, ranging from portable and handheld devices to automotive and industrial segments. A few representative applications include solar panel voltage boost, dc-bus voltage boost, battery-powered LED illumination, ethernet/USB transceivers, LED lighting in automotive and industrial applications, voltage and current-limited systems, and distributed power-supply systems.

Working Principle

The LT3990IMSE#PBF works on the principle of a DC-DC switching regulator; it has an integrated low-power MOSFET which receives the input voltage. This MOSFET is controlled by an internal PWM controller; the controller generates a gate drive pulse of variable width, allowing it to regulate the output voltage. This gate drive pulse is generated in response to voltage detect signals from the output and the feedback node.

The LT3990IMSE#PBF operates with a wide input voltage range of 8V to 32V, enabling it to receive power from various sources like lead-acid batteries, automotive systems, and wall adapters. The output voltage range is from 2.2V to 65V, offering stable and dependable operation for various applications. To ensure efficient operation, the LT3990IMSE#PBF utilizes synchronous rectification and adaptive on-time control for minimal power loss. The device also features several advanced features like programmable current limit, over-voltage protection, thermal shutdown, and more. The LT3990IMSE#PBF is available in a compact 8-pin MSOP package, allowing it to fit into very compact applications.

Benefits and Competitive Edge

The LT3990IMSE#PBF switching regulator packs many features into a small footprint, making it suitable for low-power, portable applications. The device is optimized for low output ripple, minimum noise and power loss. With its synchronous rectification and adaptive on-time control, the LT3990IMSE#PBF offers very high efficiency. The device is designed for various applications, including energy harvesting, distributed power systems, mobile equipment, and fixed-rail supplies. Its wide input range and adjustable output makes it versatile and suitable for most applications. The LT3990IMSE#PBF also offers very low external component requirements, making the design process simpler and faster.

Conclusion

The LT3990IMSE#PBF is a high-voltage, DC/DC switching regulator that offers high efficiency, low noise, and a wide input range and output voltage range. The device also features several advanced features like programmable current limit, over-voltage protection, and thermal shutdown. Its wide range of applications and low external component count make it ideal for portable, low-power applications. The LT3990IMSE#PBF is an excellent choice for most switching regulator applications, whether it is powering small devices or distributed power systems.

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