TLVH431A 1% accuracy low-voltage wide-operating current adjustable precision shunt regulator | TI.com

TLVH431A (ACTIVE) 1% accuracy low-voltage wide-operating current adjustable precision shunt regulator

 

Different accuracy grades available

This device is available in 3 accuracy grades :

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

Parametrics

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Part number Order 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) Iz for regulation (Min) (uA) Iout/Iz (Max) (mA) Package Group Iref (uA) I I(dev) (uA)
TLVH431A Order now Adjustable     1.24     1.24     18     1     138     Catalog     -40 to 125
-40 to 85
0 to 70    
60     80     SC70 | 6
SOT-23 | 3
SOT-23 | 5
SOT-89 | 3
TO-92 | 3    
0.5     0.5    
TLV431 Order now Adjustable     1.24     1.24     6     1.5     138     Catalog     -40 to 125
-40 to 85
0 to 70    
55     15     SOT-23 | 3
SOT-23 | 5
SOT-89 | 3
TO-92 | 3    
0.5     0.5    
TLV431A Order now Adjustable     1.24     1.24     6     1     138     Catalog     -40 to 125
-40 to 85
0 to 70    
55     15     SOIC | 8
SOT-23 | 3
SOT-23 | 5
SOT-89 | 3
TO-92 | 3    
0.5     0.5    
TLV431A-Q1 Samples not available Adjustable     1.24     1.24     6     1     161     Automotive     -40 to 125     55     15     SOT-23 | 5     0.5     0.5    
TLV431B Order now Adjustable     1.24     1.24     6     0.5     138     Catalog     -40 to 125
-40 to 85
0 to 70    
55     15     SC70 | 6
SOT-23 | 3
SOT-23 | 5
SOT-89 | 3
TO-92 | 3    
0.5     0.5    
TLV431B-Q1 Order now Adjustable     1.24     1.24     6     0.5     161     Automotive     -40 to 125     55     15     SOT-23 | 3
SOT-23 | 5    
0.5     0.5    
TLVH431 Order now Adjustable     1.24     1.24     18     1.5     138