Adjustable shunt reference for precision regulation
Its ±2.2% tolerance gives tighter regulation than the standard ±2% or ±1% grades found in the TL431 family, making it a good fit for precision power supplies and comparator thresholds where the reference accuracy directly affects the output tolerance. The 100 mA cathode current rating defines the load-driving ceiling; in a shunt configuration the total current through the device (load plus bias) must stay under this limit across the operating temperature range.
The 'IDRE4' suffix denotes the tape-and-reel shipping medium — 2,500 units per reel — which is the standard for automated pick-and-place assembly.
No LTB window or last-time-buy deadline applies. For dual-sourcing or alternate package options, the base number TL431 covers multiple tolerance grades and package variants (SOT-23, TO-92, SOIC-8) across the same process technology — the 'IDRE4' suffix locks in the ±2.2% grade and the tape-and-reel SOIC-8 format.