The RC0431A is a low-voltage 3-terminal adjustable precision voltage reference regulator from Fairchild Semiconductor. It has excellent thermal stability over the standard commercial temperature range. The output voltage can be set to any value between Vref (1.24V) and 12V using two external resistors. The RC0431A operates from a lower voltage (1.24V) than the traditional shunt regulator references which operate from 2.5V. When used with an optocoupler, the RC0431A will be an ideal voltage reference in an isolated feedback circuit for use in switched-mode power supplies and modular DC-DC converters. The RC0431A has a low output impedance of active output circuitry offering a very sharp turn-on characteristic. The RC0431A will be an excellent replacement for low-voltage zener diodes in many applications such as on-board regulation and adjustable power supplies.
The RC0431A is a low-voltage 3-terminal adjustable precision voltage reference regulator with a reference voltage of 1.24V. It is designed for use in discrete power circuits, switched-mode power supplies, and modular DC-DC converters. The device offers an output voltage adjustable from Vref to 12V using two external resistors and features a low output impedance of 0.25Ω typical.
| Reference Voltage | 1.24V |
|---|---|
| Output Voltage Range | Vref to 12V |
| Operational Cathode Current | 80uA |
| Output Impedance | 0.25Ω typical |
| Voltage Tolerance | 1% |
| Operating Temperature Range | 0°C to 70°C |
| Cathode Voltage Max | 13.2V |
The reference voltage is 1.24V at 25°C.
The output voltage can be set to any value between Vref (1.24V) and 12V.
The device is available in TO-92, SOT23-3, and SOT23-5 packages.