Triple-output automotive buck — what it covers
It delivers one 3 A channel and two 2 A channels from a single 4 V to 18 V input rail, with programmable output voltages from 0.68 V up to 6.3 V. The switching frequency is adjustable between 200 kHz and 2.3 MHz, letting you trade efficiency against inductor size.
Three rails from one inductor set
The triple-output architecture is what sets this part apart from single-output automotive bucks like the LMR33630APCQRNXRQ1. Where the LMR33630 gives you one 3 A rail, the TPS65263QRHBRQ1 packs three independently programmable rails — 3 A, 2 A, and 2 A — into the same 5 mm × 5 mm QFN footprint. That saves board space and BOM count for multi-rail ECUs, infotainment head units, or ADAS sensor power trees. The trade-off is that the three outputs share a single switching node and inductor, so the total load is limited by the package thermal budget rather than per-channel ratings.
Active production, no last-time-buy pressure
For a production line that needs this part over the next several years, the supply channel is stable. The base product number is TPS65263, so any PCN or documentation updates will reference that root. ROHS3 compliant per the listing, lead-free finish — no separate Pb-free certification needed.
Footprint and thermal handling
Surface-mount only — no through-hole variant. The switching frequency range from 200 kHz to 2.3 MHz lets you shift the switching harmonics above the AM band if needed for EMI compliance. Synchronous rectification keeps efficiency up at higher switching frequencies.