The TLVH431 and TLVH432 devices are low-voltage 3-terminal adjustable voltage references, 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 19). These devices operate from a lower voltage (1.24 V) than the widely used TL431 and TL1431 shunt-regulator references.
When used with an optocoupler, the TLVH431 and TLVH432 devices are ideal voltage references in isolated feedback circuits for 3-V to 3.3-V switching-mode power supplies. They have a typical output impedance of 0.25 Ω. Active output circuitry provides a very sharp turn-on characteristic, making the TLVH431 and TLVH432 devices excellent replacements for low-voltage Zener diodes in many applications, including on-board regulation and adjustable power supplies.
The TLVH432 device is identical to the TLVH431 device, but is offered with different pinouts for the
3-pin SOT-23 and SOT-89 packages.
|PART NUMBER||PACKAGE||BODY SIZE (NOM)|
|TLVH43xxDBZ||SOT-23 (5)||2.90 mm × 1.60 mm|
|TLVH43xxDBZ||SOT-23 (3)||2.92 mm × 1.30 mm|
|TLVH43xxDCK||SC70 (6)||2.00 mm × 1.25 mm|
|TLVH43xxLP||TO-92 (3)||4.30 mm × 4.30 mm|
|TLVH43xxPK||SOT-89 (3)||4.50 mm × 2.50 mm|