SNVS952F December 2012 – May 2021 LM25019
PRODUCTION DATA
The LM25019 step-down switching regulator features all the functions needed to implement a low-cost, efficient, buck converter that can supply up to 100 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 simplified block diagram of the LM25019 device is shown in the Figure 7-1.
The LM25019 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, minimum forced off-time, and an intelligent current limit.