LM431AIM adjustable shunt voltage reference, ±2.2% tolerance, 100 mA output, 2.495V to 37V range, 50ppm/°C typical tempco, -40°C to 85°C, 8-SOIC package, Active.
| Parameter | Value |
|---|---|
| Output type | Adjustable |
| Mounting type | Surface Mount |
| Reference type | Shunt |
| Voltage - output | 37 V |
| Voltage - output (Min (Fixed)) | 2.495V |
| Current - output | 100 mA |
| Current - cathode | 1 mA |
| Operating temperature | -40°C ~ 85°C (TA) |
| Package | Bulk |
| Tolerance | ±2.2% |
| Case | 8-SOIC (0.154\", 3.90mm Width) |
| Temperature coefficient | 50ppm/°C Typical |
The device sinks up to 100 mA of output current, with a minimum cathode current of 1 mA required to maintain regulation.
The RoHS compliance status is listed as non-compliant, so verify your assembly house's exemption policy if your BOM requires full RoHS conformance.
The LM431AIM is functionally equivalent to the industry-standard TL431 — both are three-terminal adjustable shunt references with the same 2.495V reference and adjustable output up to 36V or 37V. Pin-compatible in the same 8-SOIC footprint. The LM431AIM carries a ±2.2% tolerance; TL431 variants typically offer 1% or 2% grades. Check the specific tolerance your design requires before substituting.
The LM431AIM is specified with a ±2.2% tolerance on the reference voltage. This is a general-purpose grade; for tighter regulation, a series reference like the LM4132AMF-4.1/NOPB (±0.05%) would be a closer fit.