What the switching controller does in a power stage
The LM3001N is a switching controller — the PWM and control logic that drives external power switches in a DC-DC converter stage. It does not integrate the FETs, so the output current and voltage range are set by the external transistor choice and the compensation network around the controller. Texas Instruments lists the part as active in production, meaning it remains a supported catalog item for new builds and replacement orders. The Bulk package (tube or tray) suits low-to-medium volume assembly or bench prototyping where tape-and-reel feed is not required.
RoHS status and compliance documentation
The LM3001N is marked RoHS non-compliant. For projects requiring RoHS exemption or full lead-free assembly, verify the date code and the specific TI compliance declaration before committing the BOM line.