Boost converter with 3.9 A integrated switch
The Texas Instruments TPS61253YFFT is a synchronous step-up (boost) converter delivering a fixed 5 V output from a 2.65 V to 4.85 V input rail. Switching at 3.5 MHz keeps the inductor and output capacitor small — typically a 1 µH to 2.2 µH inductor and a 10 µF ceramic output cap fit the bill, which shrinks the total solution footprint.
Package and mounting for space-constrained boards
The 9-UFBGA land pattern requires a controlled solder-paste stencil and a reflow profile matched to the 0.4 mm ball pitch — standard for DSBGA assembly.
The synchronous rectifier (integrated low-side and high-side FETs) improves efficiency at light loads — a practical benefit for battery-operated designs where every milliampere counts.
