LT80604AAFO+T

LT80604AAFO+T is a 4 A Silent Switcher step-down regulator in the LT80604A/LT80605A family, converting inputs from 3 V to 65 V in a compact 17-lead 3 mm by 4 mm QFN package. The Silent Switcher architecture keeps radiated and conducted EMI low without slowing the switching edges, so wide-input industrial, automotive and telecom rails can sit close to noise-sensitive RF and sensor circuitry without heavy filtering. Quiescent current is just 8 microamp, which protects standby and always-on power budgets on battery-backed and energy-conscious rails, while the operating range extends from -40 degrees C to +150 degrees C junction for hot under-hood and enclosed-equipment environments. The wide 3 V to 65 V input span lets one part cover 12 V, 24 V and 48 V nominal buses plus their transients, simplifying qualification across a product line. Selection advice: choose this 4 A standard variant when the load budget fits with margin; if the rail needs more headroom, step up to the 5.5 A LT80605AAFO+T in the same footprint, and note that the family's HV-footnote variants are potential future products, not orderable parts. Parameters verified against Analog Devices documentation.