Fixed 3.3V rail from 2.7V to 5.5V input
The MCP1602-330I/MS is a fixed 3.3V output buck converter from Microchip Technology, delivering 500mA continuous from a 2.7V to 5.5V input rail. The 2MHz switching frequency keeps the inductor small — typical for space-constrained portable or embedded designs where the 3.3V logic rail is derived from a Li-ion battery (3.0-4.2V) or a 5V USB bus. Synchronous rectification is integrated on-chip, eliminating the external catch diode and improving efficiency at light loads — a practical advantage when the 3.3V rail powers an MCU that sleeps most of the time and bursts to full draw.
Temperature grade and package fit
Housed in an 8-MSOP (3.00mm width) — also listed as 8-TSSOP — the package footprint is standard for low-pin-count DC-DC controllers. The tube delivery (50-unit tubes typical) suits prototype and low-volume builds; for reel quantities the order code suffix changes.