Active TEC driver in a WLP package
The MAX8521EWX+T is an active-production Thermoelectric Cooler (TEC) driver IC from Analog Devices, purpose-built to control the current and voltage to a Peltier element for precision temperature stabilization. Operating from a 3V to 5.5V supply rail, it integrates the power stage and control logic needed to drive a TEC in both heating and cooling directions without external H-bridge FETs.
Package and board integration
Housed in a 36-WLP (Wafer-Level Package) measuring 3.07mm x 3.07mm, the MAX8521EWX+T mounts directly on the PCB with a surface-mount reflow profile — no leadframe, no mold compound, just the silicon die with solder bumps. The WLP footprint demands a clean solder-paste stencil and a controlled reflow oven; the bump pitch and pad layout are optimized for the 36-ball array, and the package's low profile suits tight optical-bench assemblies.