TL431BQDBZR Shunt regulator: NXP, SOT-23, TL431BQDBZR Datasheet
-40°C~125°C TA Adjustable 0.95mm PMIC TL431 TO-236-3, SC-59, SOT-23-3









-40°C~125°C TA Adjustable 0.95mm PMIC TL431 TO-236-3, SC-59, SOT-23-3
TL431BQDBZR shunt regulator is a three-terminal shunt regulator. This article will unlock more details about TL431BQDBZR, including its pinout, datasheet, feature and so on... Welcome your RFQ!

3 useful circuits with TL431.
TL431BQDBZR Pinout

TL431BQDBZR Pinout
| Pin | Symbol | Name |
| 1 | K | CATHODE |
| 2 | REF | REFERENCE |
| 3 | A | ANODE |
TL431BQDBZR CAD Model
Symbol

TL431BQDBZR Symbol
Footprint

TL431BQDBZR Footprint
3D Model

TL431BQDBZR 3D Model
TL431BQDBZR Description
The TL431BQDBZR is from a three-terminal shunt regulator family with an output voltage range between Vref and 36 V, to be set by two external resistors.
• The TL431xDBZR types feature an enhanced stability area with a very low load capacity requirement.
• The TL431xFDT types offer an enhanced stability area and a higher ElectroMagnetic Interference (EMI) ruggedness, for example, for Switch Mode Power Supply (SMPS) applications.
• The TL431xSDT types are designed for standard requirements and linear applications.
TL431BQDBZR Feature
Programmable output voltage up to 36 V
Three different reference voltage tolerances:
Standard grade: 2 %
A-Grade: 1 %
B-Grade : 0.5 %
Typical temperature drift: 6 mV (in a range of 0 ℃ up to 70 ℃)
Low output noise
Typical output impedance: 0.2 Ω
Sink current capability: 1 mA to 100 mA
AEC-Q100 qualified (grade 1)
TL431BQDBZR Application
Shunt regulator
Precision current limiter
Precision constant current sink
Isolated feedback loop for Switch Mode Power Supply (SMPS)
TL431BQDBZR Application Circuit
The following figure shows the application circuit of TL431BQDBZR:

TL431BQDBZR-Shunt regulator

TL431BQDBZR-Series pass regulator

TL431BQDBZR- High-current shunt regulator

TL431BQDBZR-TL431 in the control loop of SMPS
TL431BQDBZR Function Block Diagram
The following figure shows the functional block diagram of TL431BQDBZR:

TL431BQDBZR Functional Diagram
Specifications
- TypeParameter
- Factory Lead Time4 Weeks
- Mounting Type
The "Mounting Type" in electronic components refers to the method used to attach or connect a component to a circuit board or other substrate, such as through-hole, surface-mount, or panel mount.
Surface Mount - Package / Case
refers to the protective housing that encases an electronic component, providing mechanical support, electrical connections, and thermal management.
TO-236-3, SC-59, SOT-23-3 - Surface Mount
having leads that are designed to be soldered on the side of a circuit board that the body of the component is mounted on.
YES - Number of Pins3
- Operating Temperature
The operating temperature is the range of ambient temperature within which a power supply, or any other electrical equipment, operate in. This ranges from a minimum operating temperature, to a peak or maximum operating temperature, outside which, the power supply may fail.
-40°C~125°C TA - Packaging
Semiconductor package is a carrier / shell used to contain and cover one or more semiconductor components or integrated circuits. The material of the shell can be metal, plastic, glass or ceramic.
Digi-Reel® - Published2005
- Tolerance
In electronic components, "tolerance" refers to the acceptable deviation or variation from the specified or ideal value of a particular parameter, such as resistance, capacitance, or voltage. It indicates the range within which the actual value of the component can fluctuate while still being considered acceptable for use in a circuit. Tolerance is typically expressed as a percentage or a specific value and is important for ensuring the accuracy and reliability of electronic devices. Components with tighter tolerances are more precise but may also be more expensive. It is crucial to consider tolerance when selecting components to ensure proper functionality and performance of the circuit.
±0.5% - JESD-609 Code
The "JESD-609 Code" in electronic components refers to a standardized marking code that indicates the lead-free solder composition and finish of electronic components for compliance with environmental regulations.
e3 - Part Status
Parts can have many statuses as they progress through the configuration, analysis, review, and approval stages.
Active - Moisture Sensitivity Level (MSL)
Moisture Sensitivity Level (MSL) is a standardized rating that indicates the susceptibility of electronic components, particularly semiconductors, to moisture-induced damage during storage and the soldering process, defining the allowable exposure time to ambient conditions before they require special handling or baking to prevent failures
1 (Unlimited) - Number of Terminations3
- Terminal Finish
Terminal Finish refers to the surface treatment applied to the terminals or leads of electronic components to enhance their performance and longevity. It can improve solderability, corrosion resistance, and overall reliability of the connection in electronic assemblies. Common finishes include nickel, gold, and tin, each possessing distinct properties suitable for various applications. The choice of terminal finish can significantly impact the durability and effectiveness of electronic devices.
Tin (Sn) - Terminal Position
In electronic components, the term "Terminal Position" refers to the physical location of the connection points on the component where external electrical connections can be made. These connection points, known as terminals, are typically used to attach wires, leads, or other components to the main body of the electronic component. The terminal position is important for ensuring proper connectivity and functionality of the component within a circuit. It is often specified in technical datasheets or component specifications to help designers and engineers understand how to properly integrate the component into their circuit designs.
DUAL - Terminal Form
Occurring at or forming the end of a series, succession, or the like; closing; concluding.
GULL WING - Peak Reflow Temperature (Cel)
Peak Reflow Temperature (Cel) is a parameter that specifies the maximum temperature at which an electronic component can be exposed during the reflow soldering process. Reflow soldering is a common method used to attach electronic components to a circuit board. The Peak Reflow Temperature is crucial because it ensures that the component is not damaged or degraded during the soldering process. Exceeding the specified Peak Reflow Temperature can lead to issues such as component failure, reduced performance, or even permanent damage to the component. It is important for manufacturers and assemblers to adhere to the recommended Peak Reflow Temperature to ensure the reliability and functionality of the electronic components.
260 - Number of Functions1
- Terminal Pitch
The center distance from one pole to the next.
0.95mm - Time@Peak Reflow Temperature-Max (s)
Time@Peak Reflow Temperature-Max (s) refers to the maximum duration that an electronic component can be exposed to the peak reflow temperature during the soldering process, which is crucial for ensuring reliable solder joint formation without damaging the component.
30 - Base Part Number
The "Base Part Number" (BPN) in electronic components serves a similar purpose to the "Base Product Number." It refers to the primary identifier for a component that captures the essential characteristics shared by a group of similar components. The BPN provides a fundamental way to reference a family or series of components without specifying all the variations and specific details.
TL431 - JESD-30 Code
JESD-30 Code refers to a standardized descriptive designation system established by JEDEC for semiconductor-device packages. This system provides a systematic method for generating designators that convey essential information about the package's physical characteristics, such as size and shape, which aids in component identification and selection. By using JESD-30 codes, manufacturers and engineers can ensure consistency and clarity in the specification of semiconductor packages across various applications and industries.
R-PDSO-G3 - Number of Outputs1
- Output Type
The "Output Type" parameter in electronic components refers to the type of signal or data that is produced by the component as an output. This parameter specifies the nature of the output signal, such as analog or digital, and can also include details about the voltage levels, current levels, frequency, and other characteristics of the output signal. Understanding the output type of a component is crucial for ensuring compatibility with other components in a circuit or system, as well as for determining how the output signal can be utilized or processed further. In summary, the output type parameter provides essential information about the nature of the signal that is generated by the electronic component as its output.
Adjustable - Trim/Adjustable Output
Trim or adjustable output refers to the ability of an electronic component, such as a voltage regulator or power supply, to produce an output voltage that can be finely tuned or adjusted to meet specific requirements. This feature allows for precise control over the output voltage level, accommodating variations in load conditions or desired operational parameters. Users can typically achieve this adjustment through external resistors, potentiometers, or internal calibration mechanisms, ensuring optimal performance in diverse applications.
YES - Analog IC - Other Type
Analog IC - Other Type is a parameter used to categorize electronic components that are integrated circuits (ICs) designed for analog signal processing but do not fall into more specific subcategories such as amplifiers, comparators, or voltage regulators. These ICs may include specialized analog functions such as analog-to-digital converters (ADCs), digital-to-analog converters (DACs), voltage references, or signal conditioning circuits. They are typically used in various applications where precise analog signal processing is required, such as in audio equipment, instrumentation, communication systems, and industrial control systems. Manufacturers provide detailed specifications for these components to help engineers select the most suitable IC for their specific design requirements.
THREE TERMINAL VOLTAGE REFERENCE - Voltage - Output
Voltage - Output is a parameter that refers to the electrical potential difference between the output terminal or pin of an electronic component and a reference point, typically ground. It indicates the level of voltage that the component is capable of providing at its output under specified operating conditions. This parameter is crucial in determining the performance and functionality of the component in a circuit, as it directly affects the signal or power being delivered to other components or devices connected to the output. Engineers and designers use the voltage output specification to ensure compatibility and proper functioning of the component within the overall system.
2.495V - Voltage - Output (Min/Fixed)
Voltage - Output (Min/Fixed) refers to the minimum fixed output voltage level that an electronic component, such as a voltage regulator or power supply, is designed to provide under specified load conditions. This parameter ensures that the device consistently delivers a reliable voltage that meets the requirements of the connected circuits or components. It is critical for applications where stable and predictable voltage is necessary for proper operation.
2.495V - Reference Type
a code object that is not stored directly where it is created, but that acts as a kind of pointer to a value stored elsewhere.
Shunt - Output Voltage-Min
Output Voltage-Min is a parameter in electronic components that specifies the minimum voltage level that the component can provide at its output terminal under specified operating conditions. This parameter is crucial for determining the range of voltages that the component can deliver reliably to the connected circuit or device. It helps in ensuring that the output voltage remains within acceptable limits to prevent damage to the component or the connected components. Designers and engineers use this parameter to select components that meet the voltage requirements of their circuits and to ensure proper functionality and performance.
2.483V - Temp Coef of Voltage-Max
The parameter "Temp Coef of Voltage-Max" refers to the temperature coefficient of the maximum voltage rating of an electronic component. It indicates how the maximum voltage that the component can handle varies with temperature changes. A positive temperature coefficient means that the maximum voltage increases with temperature, while a negative coefficient indicates a decrease. This parameter is crucial for ensuring reliable performance and preventing breakdowns under different operating temperatures.
888 ppm/°C - Current - Cathode
Current - Cathode refers to the flow of electric current through the cathode terminal of an electronic component, such as a diode or a vacuum tube. It represents the amount of charge carriers, typically electrons, moving towards the cathode during operation. This parameter is crucial for determining the component's functionality and performance characteristics, as it influences the efficiency and stability of the circuit. High cathode current can indicate increased power consumption or potential overheating issues if not managed properly.
600μA - Voltage - Supply (Max)
Voltage - Supply (Max) is a parameter in electronic components that specifies the maximum voltage that can be safely applied to the component for proper operation. This parameter is crucial for ensuring the component's longevity and preventing damage due to overvoltage conditions. Exceeding the maximum supply voltage can lead to component failure, reduced performance, or even permanent damage. Designers must carefully consider this parameter when selecting components and designing circuits to ensure reliable and safe operation within the specified voltage limits.
36V - Voltage - Supply (Min)
Voltage - Supply (Min) is a parameter in electronic components that specifies the minimum voltage required for the component to operate within its specified performance range. This parameter indicates the lowest voltage level that can be safely applied to the component without causing malfunctions or damage. It is crucial to ensure that the supply voltage provided to the component is equal to or higher than the specified minimum voltage to guarantee proper functionality and reliability. Failure to meet this requirement may result in erratic behavior, reduced performance, or even permanent damage to the component.
2.495V - Length2.9mm
- Height Seated (Max)
Height Seated (Max) is a parameter in electronic components that refers to the maximum allowable height of the component when it is properly seated or installed on a circuit board or within an enclosure. This specification is crucial for ensuring proper fit and alignment within the overall system design. Exceeding the maximum seated height can lead to mechanical interference, electrical shorts, or other issues that may impact the performance and reliability of the electronic device. Manufacturers provide this information to help designers and engineers select components that will fit within the designated space and function correctly in the intended application.
1.1mm - Width1.3mm
- RoHS Status
RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.
ROHS3 Compliant
TL431BQDBZR Package

TL431BQDBZR Package
TL431BQDBZR Manufacturer
Nexperia is a dedicated global leader in Discretes, Logic and MOSFETs devices. This new company became independent at the beginning of 2017. Focused on efficiency, Nexperia produces consistently reliable semiconductor components at a high volume: 85 billion annually. The company’s extensive portfolio meets the stringent standards set by the Automotive industry. And industry-leading small packages, produced in their own manufacturing facilities, combine power and thermal efficiency with best-in-class quality levels. Built on over half a century of expertise, Nexperia has 11,000 employees across Asia, Europe and the U.S. supporting customers globally.
Datasheet PDF
- Datasheets :
- PCN Packaging :
- PCN Assembly/Origin :
- PCN Design/Specification :
- RohsStatement :
Trend Analysis
What family includes a range of 3-terminal adjustable shunt regulators?
TL431.
What type of shunt regulators feature an enhanced stability area with a very low load capacity requirement?
TL431xDBZR types.
What type of ruggedness does the TL431xFDT types offer?
Electromagnetic Interference (EMI) ruggedness.
What are the TL431xSDT types designed for?
Standard requirements and linear applications.
What are the applications of the shunt regulator?
A shunt regulator is used for low-powered circuits. It works by directing the current away from the load and sending it into the ground. It provides a path from the input voltage to a variable resistor which is connected to the ground.
What is the difference between series and shunt regulator?
A series regulator is connected in series with the load to stabilize the regulator's output voltage. A shunt regulator, on the other hand, is connected in parallel to the load to stabilize the device's output voltage.
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