STMicroelectronics TL1431IZ, adjustable shunt voltage reference, ±0.4% tolerance, 2.5 V to 36 V output, 100 mA cathode current, -40°C to 105°C, through-hole TO-92-3 package, Bulk.
| Parameter | Value |
|---|---|
| Output type | Adjustable |
| Mounting | Through Hole |
| Reference type | Shunt |
| Voltage - output | 36 V |
| Voltage - output (Min (Fixed)) | 2.5V |
| Output current | 100 mA |
| Current - cathode | 1 mA |
| Operating temperature | -40°C ~ 105°C (TA) |
| Package | Bulk |
| Tolerance | ±0.4% |
| Case | TO-226-2, TO-92-2 (TO-226AC) |
| Temperature coefficient | 100ppm/°C |
It sets output voltage anywhere between 2.5 V and 36 V using two external resistors, with an initial tolerance of ±0.4% and a temperature coefficient of 100 ppm/°C. The shunt topology means the device sinks current through the cathode pin — it regulates by shunting current away from the load, not by sourcing it.
The TL1431IZ initial tolerance is ±0.4%.
The TL1431IZ has an initial tolerance of ±0.4%, which is tighter than the generic TL431's ±1% or ±2% grades. This makes it suitable for precision voltage references in feedback loops where output accuracy matters.
The TL1431ACL5T is a surface-mount variant (SOT-23-5) with a tighter ±0.25% tolerance and a 90 ppm/°C temperature coefficient, but its operating range is limited to -20°C to 70°C. The TL1431IZ covers the industrial temperature range (-40°C to 105°C) in a through-hole TO-92-3 package. Choose the ACL5T for compact, commercial-temperature designs; choose the IZ for industrial environments or when a through-hole footprint is required.
Yes, the TL1431IZ is pin-compatible with the standard TL431 in the TO-92 package and offers a tighter ±0.4% tolerance versus the TL431's typical ±1% or ±2%. The output voltage range (2.5 V to 36 V) and 100 mA cathode current are the same. For designs that already use a TL431, the TL1431IZ drops in with no board change and improves regulation accuracy.