Automotive-grade 60 V buck for 12 V/24 V/48 V rails
The TPS54360BQDDAQ1: It handles a 4.5 V to 60 V input range and delivers up to 3.5 A at an adjustable output from 0.8 V up to 58.8 V. The wide input range covers 12 V automotive battery, 24 V truck, and 48 V PoE or telecom buses without an external pre-regulator. The 150 °C junction temperature rating supports under-hood and engine-bay placement where ambient temperatures push past 105 °C.
Switching frequency and output current — sizing the power stage
The switching frequency is adjustable from 100 kHz to 2.5 MHz via a single resistor on the RT/CLK pin. A 2.5 MHz setting shrinks the inductor and output capacitor footprint, but the switching losses in the internal FET raise the junction temperature — the 3.5 A output rating assumes adequate PCB copper area on the PowerPad for thermal relief. The regulator uses an external Schottky catch diode (no synchronous rectifier), so the diode forward voltage and reverse recovery losses factor into the efficiency calculation at high switching frequencies. At 2.5 MHz the diode dominates the loss budget above 50 % load.
Package and thermal — the PowerPad is the heat path
The tube shipment is standard for this order code; reel quantities are available under the TPS54360BQDDAQ1 tape-and-reel suffix.
The base product number TPS54360 covers multiple output current and package variants; the Q1 suffix confirms AEC-Q100 automotive qualification and 150 °C junction rating.