The TPS5450QDDARQ1 is a Texas Instruments SWIFT™ series step-down regulator rated for 5 A continuous output from a 5.5 V to 36 V input rail. The adjustable output range from 1.221 V to 32.04 V means the same BOM line can serve multiple voltage rails. No synchronous rectifier — the external Schottky diode handles the low-side current.
Automotive temperature grade and AEC-Q100 qualification
That is the full automotive temperature envelope — the part can sit on an engine control unit board or a transmission controller.
Active lifecycle – no last-time-buy pressure
ROHS3 compliant.
Package and footprint – PowerSOIC-8 with exposed pad
8-PowerSOIC package, 3.90 mm width, 0.154 inch body. The exposed thermal pad (PowerPad) requires a solder-paste stencil opening that covers at least 50% of the pad area to get the rated thermal performance. The 500 kHz switching frequency means the input capacitor should sit within 5 mm of the VIN pin to keep the switching loop small and reduce radiated emissions — a 10 µF ceramic plus a 0.1 µF bypass is the standard decoupling pair.