ZTL431 and ZTL432 are three terminal adjustable shunt regulators offering excellent temperature stability and output current handling capability up to 100mA. The output voltage may be set to any chosen voltage between 2.5 and 20 volts by selection of two external divider resistors. The devices can be used as a replacement for zener diodes in many applications requiring an improvement in zener performance.
The ZTL431 and ZTL432 are three‑terminal adjustable shunt regulators offering precise reference voltage (2.5 V‑20 V) and up to 100 mA cathode current. They are intended as high‑performance replacements for zener diodes, featuring low temperature coefficient and selectable tolerance grades (A 1 % / B 0.5 %).
The datasheet provides full electrical characteristics, recommended operating conditions, typical performance graphs, and application circuits. It also lists ordering codes, package dimensions, and thermal data for TO‑92, SOT‑23, SOT‑23F, SOT‑23‑5 and SC70‑6 packages.
| Temperature range | -40 °C to 125 °C |
|---|---|
| Maximum cathode current | 100 mA |
| Reference voltage range | 2.5 V to 20 V |
| Typical output impedance | 0.20 Ω |
| Package thermal resistance (TO‑92) | 160 °C/W |
| Package thermal resistance (SOT‑23) | 380 °C/W |
| Package thermal resistance (SOT‑23F) | 138 °C/W |
The devices can handle cathode current from 1 µA up to 100 mA.
They are specified for operation from –40 °C to 125 °C.
The output voltage can be adjusted between 2.5 V and 20 V.