| VO (V) | 1.24 |
| Reference voltage | Adjustable |
| Initial accuracy (Max) (%) | 0.5 |
| VO adj (Min) (V) | 1.24 |
| VO adj (Max) (V) | 18 |
| Iz for regulation (Min) (uA) | 60 |
| Rating | HiRel Enhanced Product |
| Temp coeff (Max) (ppm/ degree C) | 138 |
| Operating temperature range (C) | -55 to 125 |
| Iout/Iz (Max) (mA) | 80 |
- Low-voltage operation: down to 1.24 V
- Reference voltage tolerances 0.5% at 25°C
- Adjustable output voltage, VO = VREF to 18 V
- Wide operating cathode current range:
200 μA to 70 mA - 0.25-? typical output impedance
- Supports defense and aerospace applications:
- Controlled baseline
- Available in extended (–55°C to 125°C) temperature range
- Extended product life cycle
- Extended product-change notification
- Product traceability
The TLVH431B-EP device is a low-voltage, 3-terminal, adjustable voltage reference with specified thermal stability over applicable industrial and commercial temperature ranges. Output voltage can be set to any value between VREF (1.24 V) and 18 V with two external resistors (see Figure 24). This device operates from a lower voltage (1.24 V) than the widely used TL431 and TL1431 shunt-regulator references.
When used with an optocoupler, the TLVH431B-EP device is ideal for voltage references in isolated feedback circuits designed for 3-V to 3.3-V switching-mode power supplies. It has a typical output impedance of 0.25 ?. Active output circuitry provides a very sharp turn-on characteristic, making the TLVH431B-EP device an excellent replacement for low-voltage Zener diodes in many applications, including on-board regulation and adjustable power supplies.