SNVS953G December 2012 – May 2021 LM25018
The LM25018 step-down switching regulator features all the functions needed to implement a low-cost, efficient buck converter capable of supplying up to 325 mA to the load. This high voltage regulator contains 48 V,
N-channel buck and synchronous switches, is easy to implement, and is provided in thermally-enhanced SO PowerPAD-8 and WSON-8 packages. The regulator operation is based on a constant on-time control scheme using an on-time inversely proportional to VIN. This control scheme does not require loop compensation. The current limit is implemented with a forced off-time inversely proportional to VOUT. This scheme ensures short circuit protection while providing minimum foldback.
The LM25018 device can be applied in numerous applications to efficiently regulate down higher voltages. This regulator is well-suited for 12-V and 24-V rails. Protection features include: thermal shutdown, undervoltage lockout (UVLO), minimum forced off-time, and an intelligent current limit.