TL431QDBZTG4
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Texas Instruments TL431QDBZTG4

Manufacturer No:
TL431QDBZTG4
Manufacturer:
Texas Instruments
Package:
Tape & Reel (TR)
Description:
IC VREF SHUNT ADJ 2.2% SOT23-3
Delivery:
Payment:
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Product Introduction

Overview

The TL431QDBZTG4 is a three-terminal adjustable shunt regulator produced by Texas Instruments. This device is known for its high thermal stability and adjustable output voltage, making it suitable for a wide range of applications including automotive, commercial, and military environments. The TL431 series offers excellent performance as a replacement for Zener diodes in various power supply and regulation circuits.

Key Specifications

AttributeValue
PackageSOT-23 (DBZ)
Pins3
Operating Temperature Range-40°C to 125°C
Reference VoltageApproximately 2.5V
Output Voltage RangeVref to 36V
Output ImpedanceTypical 0.2Ω
Sink Current Capability1mA to 100mA
Reference Voltage Tolerance2% (Standard grade), 1% (A grade), 0.5% (B grade)
Power Dissipation950mW
Mounting MethodSurface Mount

Key Features

  • Programmable output voltage up to 36V, set by two external resistors.
  • Reference voltage tolerance at 25°C: 0.5% (B grade), 1% (A grade), and 2% (Standard grade).
  • Typical output impedance of 0.2Ω and low output noise.
  • Sink-current capability: 1mA to 100mA.
  • Operation from -40°C to 125°C, ensuring stability over a wide temperature range.
  • Active output circuitry with a sharp turn-on characteristic, making it an excellent replacement for Zener diodes.

Applications

  • Shunt regulator.
  • Precision current limiter.
  • Precision constant current sink.
  • Isolated feedback loop for Switch Mode Power Supply (SMPS).
  • On-board regulation, adjustable power supplies, and switching power supplies.

Q & A

  1. What is the TL431QDBZTG4? The TL431QDBZTG4 is a three-terminal adjustable shunt regulator produced by Texas Instruments.
  2. What is the operating temperature range of the TL431QDBZTG4? The operating temperature range is -40°C to 125°C.
  3. What is the reference voltage of the TL431QDBZTG4? The reference voltage is approximately 2.5V.
  4. How is the output voltage of the TL431QDBZTG4 set? The output voltage can be set to any value between Vref and 36V using two external resistors.
  5. What are the typical applications of the TL431QDBZTG4? Applications include shunt regulation, precision current limiting, precision constant current sinking, and isolated feedback loops for SMPS.
  6. What is the sink-current capability of the TL431QDBZTG4? The sink-current capability ranges from 1mA to 100mA.
  7. What is the typical output impedance of the TL431QDBZTG4? The typical output impedance is 0.2Ω.
  8. Is the TL431QDBZTG4 suitable for automotive applications? Yes, it is qualified according to AEC-Q100 (grade 1) and recommended for use in automotive applications.
  9. What is the power dissipation of the TL431QDBZTG4? The power dissipation is 950mW.
  10. What are the different grades of reference voltage tolerance available for the TL431 series? The TL431 series is available in three grades: 0.5% (B grade), 1% (A grade), and 2% (Standard grade).

Product Attributes

Reference Type:Shunt
Output Type:Adjustable
Voltage - Output (Min/Fixed):2.495V
Voltage - Output (Max):36 V
Current - Output:100 mA
Tolerance:±2.2%
Temperature Coefficient:- 
Noise - 0.1Hz to 10Hz:- 
Noise - 10Hz to 10kHz:- 
Voltage - Input:- 
Current - Supply:- 
Current - Cathode:1 mA
Operating Temperature:-40°C ~ 125°C (TA)
Mounting Type:Surface Mount
Package / Case:TO-236-3, SC-59, SOT-23-3
Supplier Device Package:SOT-23-3
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Similar Products

Part Number TL431QDBZTG4 TL432QDBZTG4 TL431IDBZTG4 TL431QDBVTG4 TL431QDBZRG4
Manufacturer Texas Instruments Texas Instruments Texas Instruments Texas Instruments Texas Instruments
Product Status Discontinued at Digi-Key Obsolete Discontinued at Digi-Key Obsolete Discontinued at Digi-Key
Reference Type Shunt Shunt Shunt Shunt Shunt
Output Type Adjustable Adjustable Adjustable Adjustable Adjustable
Voltage - Output (Min/Fixed) 2.495V 2.495V 2.495V 2.495V 2.495V
Voltage - Output (Max) 36 V 36 V 36 V 36 V 36 V
Current - Output 100 mA 100 mA 100 mA 100 mA 100 mA
Tolerance ±2.2% ±2.2% ±2.2% ±2.2% ±2.2%
Temperature Coefficient - - - - -
Noise - 0.1Hz to 10Hz - - - - -
Noise - 10Hz to 10kHz - - - - -
Voltage - Input - - - - -
Current - Supply - - - - -
Current - Cathode 1 mA 1 mA 1 mA 1 mA 1 mA
Operating Temperature -40°C ~ 125°C (TA) -40°C ~ 125°C (TA) -40°C ~ 85°C (TA) -40°C ~ 125°C (TA) -40°C ~ 125°C (TA)
Mounting Type Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount
Package / Case TO-236-3, SC-59, SOT-23-3 TO-236-3, SC-59, SOT-23-3 TO-236-3, SC-59, SOT-23-3 SC-74A, SOT-753 TO-236-3, SC-59, SOT-23-3
Supplier Device Package SOT-23-3 SOT-23-3 SOT-23-3 SOT-23-5 SOT-23-3

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