Low-Voltage Adjustable Precision Shunt Regulator - TLVH431A

TLVH431A (ACTIVE)

Low-Voltage Adjustable Precision Shunt Regulator

 

Description

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 ). 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.

Features

  • 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

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Parametrics Compare all products in Shunt Voltage Reference

 
Reference Voltage
VO (V)
VO Adj (Min) (V)
VO Adj (Max) (V)
Initial Accuracy (Max) (%)
Temp Coeff (Max) (ppm/ degree C)
Rating
Operating Temperature Range (C)
Min Iz for Regulation (uA)
Iout/Iz (Max) (mA)
Package Group
TLVH431A TLVH431 TLVH431A-Q1 TLVH431B TLVH431B-Q1
Adjustable    Adjustable    Adjustable    Adjustable    Adjustable   
N/A    N/A    N/A    N/A    N/A   
1.24    1.24    1.24    1.24    1.24   
18    18    18    18    18   
1    1.5    1    0.5    0.5   
138    138    161    138    161   
Catalog    Catalog    Automotive    Catalog    Automotive   
-40 to 125
-40 to 85
0 to 70   
-40 to 125
-40 to 85
0 to 70   
-40 to 125    -40 to 125
-40 to 85
0 to 70   
-40 to 125   
60    60    60    60    60   
80    80    80    80    80   
SC70
SOT-23
SOT-23
SOT-89
TO-92   
SC70
SOT-23
SOT-23
SOT-89
TO-92   
SOT-23    SC70
SOT-23
SOT-23
SOT-89
TO-92   
SOT-23
SOT-23   

Other qualified versions of TLVH431A

Version Part Number Definition
Automotive TLVH431A-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects