Active lifecycle — this part is in current production
The LM34914SD/NOPB: This is a current-production part you can source for new designs or BOM replenishment without a migration timeline.
1.25 A output, 8-40 V input — the fit decision
Rated for 1.25 A continuous output from an 8 V to 40 V input rail, the LM34914SD/NOPB is sized for 12 V or 24 V industrial buses where the load is a sensor node, a small relay bank, or an auxiliary bias supply. The 1.3 MHz switching frequency lets the designer use a small inductor and ceramic output capacitor — the typical footprint fits a 10 mm² board area. But note: this is a non-synchronous buck, so an external Schottky catch diode is required. The diode's forward drop and reverse leakage add to the thermal budget, especially at high input voltage and low duty cycle.
10-WSON package — layout and thermal notes
The 10-WFDFN (3x3 mm) with exposed pad requires a thermal land on the PCB. The datasheet's recommended footprint calls for a 2.2x2.2 mm pad with thermal vias to the inner ground layer.