Triple-output buck: 3 A + 2 A + 2 A for multi-rail systems
The adjustable output voltage range spans from 2.7 V up to 6 V, and the switching frequency is programmable between 250 kHz and 2.4 MHz.
Current budget per rail — sizing the output stage
The 3 A channel on output 1 and the 2 A channels on outputs 2 and 3 set the per-rail load budget. Each channel uses its own inductor and output capacitor pair; the total combined output current is 7 A, but thermal derating in the 32-VQFN (5x5 mm) package at 125°C junction will reduce that ceiling.
Switching frequency: trade-off between efficiency and inductor size
The 250 kHz to 2.4 MHz programmable range lets the designer choose a lower frequency for higher efficiency (larger inductor) or a higher frequency for a smaller inductor footprint. At 2.4 MHz the switching losses dominate, so the 3 A channel will see a measurable efficiency drop versus running at 500 kHz.