Four programmable rails in one QFN — 3A bucks plus 300 mA LDOs
The LP87334ARHDRQ1 packs two 3 A step-down buck converters and two 300 mA linear LDOs into a single 28-VFQFN package, with all four outputs independently programmable via I2C. The bucks cover 0.7 V to 3.36 V; the LDOs cover 0.8 V to 3.3 V — enough range to power a modern SoC core, memory I/O, and analog front-end from one IC. Switching at 2 MHz lets the output filter components shrink — a 1 µH inductor and 10 µF ceramic cap per buck channel fit the bill for most automotive processor rails, saving board area in an ECU that already has tight real estate.
AEC-Q100 Grade 1 — -40°C to 125°C ambient, 2.8 V to 5.5 V input
Qualified to AEC-Q100 Grade 1, the LP87334ARHDRQ1 operates from -40°C to 125°C ambient — the full under-hood temperature band. The 2.8 V to 5.5 V input range covers a 12 V battery dipped to 4.5 V during cold crank and survives a 40 V load-dump transient when the alternator field decays, as long as the upstream TVS clamps the bus within the abs-max rating. The integrated power sequencer manages the four rail start-up order without an external supervisor — one less IC to qualify and one less trace to route on the board. The sequencer timing is programmable, so the core rail can ramp before the I/O rail, matching the SoC's power-up sequence.
Wettable flank QFN — AOI-friendly and reworkable
The 28-VFQFN package uses wettable flanks — the side of each pad is plated so solder wicks up the edge, creating a visible fillet that automated optical inspection (AOI) can verify. For the rework bench, that means you can see the joint quality after hot-air removal and replacement without X-ray. The 5 mm × 5 mm footprint (28-VQFN) with exposed thermal pad pulls heat into the board's copper plane. The pad's solder paste coverage should match the recommended stencil aperture in the datasheet — too much paste and the part floats; too little and the thermal resistance climbs.
Active production — no LTB, no obsolescence risk
The part is current for both new designs and production replenishment. Sourced through authorized and independent distribution channels; availability and current pricing confirmed at RFQ against your BOM quantity.