LT3758IMSE#PBF

LT3758IMSE#PBF Application Field and Working Principle

The LT3758IMSE#PBF is a monolithic IC designed for high efficiency and high power density synchronous buck DC/DC controllers for use in a wide range of topologies and applications, including single and multiple output buck, boost, SEPIC, flyback and Cuk converters. It combines an internal transconductance error amplifier and system-level fault protection with high speed integrated MOSFET drivers to deliver a scalable and reliable solution for higher power applications. This device is ideal for high output current supplies up to 12A and delivers up to 3A of current at 2.7V. It offers excellent efficiency, even at light loads, by automatically switching between current-mode and PWM-mode control.

Operation and Working Principle

The LT3758IMSE#PBF is an integrated device that combines control, feedback, and protection functions into a single IC. It features an integrated error amplifier, highspeed switching MOSFET drivers, undervoltage lockout, short circuit protection, adjustable output voltage, and adjustable current limit. It is fully protected against over-voltage, over-temperature, and load dump transients. The device also includes a unique dual-mode current control architecture, allowing for a smooth transition between current-mode and voltage-mode PWM control.

The LT3758IMSE#PBF is designed to control high-power switching step-down DC/DC converters with up to 12A output current. It features a high-accuracy error amplifier with a wide input voltage range and adjustable output voltage. It has a wide range of adjustable frequencies and can be used with a variety of control schemes. The device includes built-in over-voltage, over-temperature, and load-dump protection along with selectable power-saving modes. It is also designed to limit output current in case of a short circuit, protecting both the controller and the load.

Conclusion

The LT3758IMSE#PBF is a monolithic DC/DC controller optimized for switching step-down converters with high current demands. It provides a reliable, high-efficiency solution for a wide range of topologies and applications, including single and multiple output buck, boost, SEPIC, flyback and Cuk converters. It combines an internal transconductance error amplifier and system-level fault protection with high speed integrated MOSFET drivers to deliver a scalable and reliable solution for higher power applications. Its unique dual-mode current control architecture allows for a smooth transition between current-mode and voltage-mode PWM control, making it ideal for high efficiency and high power density applications.