LTC3621IMS8E-25#PBF

LTC3621IMS8E-25#PBF is a low-cost, monolithic 2A single input voltage synchronous step-down DC/DC converter with an internal high side MOSFET, designed to operate over a wide input voltage range of 4.5V – 36V. It is capable of delivering up to 2A of continuous output current. This device also integrates two programmable balancing resistors and a programmable soft-start to make the system more efficient and stable. Moreover, it includes integrated thermal shutdown, over-current protection and under-voltage lockout(UVLO) to protect the system from voltage surges or power overload.

Application Field

The LTC3621IMS8E-25#PBF is designed primarily for powering server and storage applications such as desktop storage, server motherboards and storage subsystems. It is also suitable for general purpose power management applications, automotive systems and telecom equipment.

Working Principle

The LTC3621IMS8E-25#PBF operates by synchronizing the output frequency of the top-level control loop to the input supply and adjusting the operating frequency as a function of load current and input voltage. To ensure system stability, it is designed with a current-mode as well as voltage-mode loop controlling the output of converted power. The current-mode loop allows for fast transient response and better noise immunity, while the voltage-mode loop improves the system stability and reduces input and output ripple. Additionally, the device includes current-limited MOSFETs that effectively limits peak current and maintains output power to the highest level of efficiency.

Overall, the device provides excellent performance for powering server and storage applications, improving system efficiency and reliability. With its integrated features, it eliminates the need for external current sensing resistor, enabling cost reduction and simplified board design.