It delivers up to 100 mA of sink current and requires a minimum cathode current of 1 mA to maintain regulation, making it suitable for precision reference and series regulator applications.
Tolerance and temperature stability for precision rails
The ±2.2% tolerance on the reference voltage is tighter than the standard ±1% grade found in many general-purpose shunts, giving the designer a narrower window for voltage accuracy in the BOM without moving to a higher-cost precision reference. As a shunt-type reference, the TL432IPKG3 regulates by shunting current away from the load; the 1 mA minimum cathode current must be drawn continuously, which sets a floor on the bias resistor power dissipation in the design.
SOT-89-3 package and surface-mount layout
Housed in a TO-243AA package, also designated SOT-89-3, this surface-mount device occupies a compact footprint suitable for dense PCB layouts in power supplies, battery chargers, and instrumentation. The three-pin configuration (cathode, anode, reference) is identical to the industry-standard TL431 pinout, allowing drop-in replacement in existing TL431-based designs with attention to the tighter tolerance grade.