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 Ω. 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.
| VO (V) | 1.24 |
| Initial accuracy (max) (%) | 0.5 |
| VO adj (min) (V) | 1.24 |
| VO adj (max) (V) | 18 |
| Iz for regulation (min) (µA) | 60 |
| Reference voltage (V) | adjustable |
| Rating | HiRel Enhanced Product |
| Temp coeff (max) (ppm/°C) | 138 |
| Operating temperature range (°C) | -55 to 125 |
| Iout/Iz (max) (mA) | 80 |
| SOT-23 (DBZ) | 3 | 6.9204 mm² 2.92 x 2.37 |
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