3A step-down in a 1.5x1.5 mm WLP
The MAX15058EWL+T is a 3A step-down (buck) regulator from Analog Devices, designed to convert a 2.7V to 5.5V input rail down to an adjustable output between 0.6V and 5.17V. Switching at a fixed 1MHz, the part allows the use of small inductors and ceramic capacitors, keeping the total solution footprint tight around the 9-WLP (1.5x1.5 mm) package. The integrated synchronous rectifier eliminates the external Schottky diode, improving efficiency at the 3A full-load point.
Input rail and output range
The 2.7V minimum input means the part starts from a single Li-ion cell near its end-of-discharge voltage; the 5.5V maximum covers the full 5V USB rail with margin.
Surface-mount assembly with the WLP bumps requires a solder paste stencil designed for the 0.4 mm ball pitch typical of this package class; the board-side copper pad pattern should follow the land-side ball map from the datasheet.