The TLV431A/D series of low voltage precision adjustable shunt regulators are programmable over a wide voltage range of 1.24V to 16V. The TLV431A series features a guaranteed reference accuracy of ±1.0% at 25°C and ±2.0% over the entire industrial temperature range of −40°C to 85°C. For TLV431B series, the accuracy is even higher, it’s ±0.5% and ±1.0% respectively. These devices exhibit a sharp low current turn−on characteristic with a low dynamic impedance of 0.20 Ω over an operating current range of 100μA to 20mA. This combination of features makes this series an excellent replacement for zener diodes in numerous applications circuits that require a precise reference voltage. When combined with an optocoupler, the TLV431A/B can be used as an error amplifier for controlling the feedback loop in isolated low output voltage (3.0 V to 3.3 V) switching power supplies. These devices are available in economical TO−92−3 and micro size TSOP−5 and SOT−23−3 packages.
This document is a technical datasheet for the TLV431A and TLV431B series of low voltage precision adjustable shunt regulators manufactured by ON Semiconductor. These devices are designed as precise reference voltage replacements for zener diodes, offering programmable output voltages ranging from 1.24 V to 16 V.
| Voltage Reference Tolerance (A Series) | +/- 1.0% |
|---|---|
| Voltage Reference Tolerance (B Series) | +/- 0.5% |
| Low Dynamic Output Impedance | 0.20 Ohm |
| Cathode to Anode Voltage (Max) | 18 V |
The accuracy is +/- 0.5% at 25°C and +/- 1.0% over the entire industrial temperature range.
The TLV431A and B series are programmable over a wide voltage range of 1.24 V to 16 V.
The TLV431A series features a guaranteed reference accuracy of ±1.0% at 25°C.
These devices exhibit a low dynamic impedance of 0.20 Ω over an operating current range of 100 fA to 20 mA.