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. 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 SOT-23-3 and SOT-89 packages.
Low-Voltage Operation: Down to 1.24 V
Reference Voltage Tolerances at 25°C
0.5% for B Grade
1% for A Grade
1.5% for Standard Grade
Adjustable Output Voltage, VO = VREF to 18 V
Wide Operating Cathode Current Range: 100 μA to 70 mA
0.25-Ω Typical Output Impedance
–40°C to 125°C Specifications
TLVH432 Provides Alternative Pinouts for SOT-23-3 and SOT-89 Packages
Ultra-Small SC-70 Package Offers 40% Smaller Footprint than SOT-23-3