Monolithic Power Systems Components

Moderately — remarkers target MPS parts because the MP1584EN sells for a premium over generic buck ICs. Counterfeit dies typically switch at the wrong frequency, current-limit well below 3 A, or fail thermally at sustained load. We verify each lot by benching samples: confirm the 1.5 MHz switching node frequency, run a 3 A load step and measure regulation and thermal rise, and check package marking/laser codes against MPS's authentic format. All stock comes from MPS authorized distribution with lot traceability.

The LM2596 switches at 150 kHz and needs a 100 µH inductor; the MP1584EN switches at 1.5 MHz and works with 4.7-10 µH parts, shrinking the power stage by an order of magnitude. MP1584EN also has higher efficiency at light load, a wider 4.5-28 V input range (LM2596: 4.5-40 V but with much larger magnetics), and thermal/electrical protection. If board space matters or you need clean fast transient response, MP1584EN wins; for cost-driven 12 V-to-5 V rails with room for a big inductor, LM2596 remains viable.

3 A is the continuous switch-current-limited output with adequate PCB copper — the exposed pad needs a thermal via array into a ground plane. Efficiency peaks around 90% at 12 V in / 5 V out and mid-load; at 24 V input the duty cycle drops and conduction losses rise, so derate toward 2-2.5 A. Output voltage is set by the FB resistor divider (0.8 V reference). For loads beyond ~2.5 A continuous from high input voltages, step up to an MPS 5 A part or the XL4015.

MPS is a fully legitimate S&P MidCap 500 constituent, listed on NASDAQ since 2004, with annual revenue exceeding $2 billion and thousands of employees worldwide. MPS authorized channel quotes 12-20 weeks for popular buck converters. Our Shenzhen warehouse holds MP1584EN stock for 1-3 day shipment on quantities under 10,000 pcs, with original MPS tape-and-reel packaging, C-of-C and lot codes.