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Nexperia USA Inc. TL431ACDBZR,215
- Part No.:
- TL431ACDBZR,215
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL431ACDBZR,215.pdf
- Description:
- IC VREF SHUNT ADJ 1% TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,329
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Product details
Overview
TL431ACDBZR,215 from Nexperia is an A-grade adjustable precision shunt regulator in SOT23 package, featuring 1.0 % reference voltage tolerance (2.470 V to 2.520 V at 10 mA), 0.2 Ω typical dynamic cathode-anode impedance, and operation across –40 °C to 85 °C. It functions as a programmable 2.495 V reference with external resistor network, enabling precise voltage regulation in isolated SMPS feedback paths.
For engineers reviewing the TL431ACDBZR,215 datasheet, TL431ACDBZR,215 pinout, TL431ACDBZR,215 application, or TL431ACDBZR,215 equivalent, this device supports critical design tasks including shunt-based output voltage setting, precision current sinking, and stable error amplification in DC-DC converter control loops - all requiring confirmed thermal drift, sink current range, and reference accuracy.
Technical Context
The TL431ACDBZR,215 implements a three-terminal shunt topology with internal bandgap reference, error amplifier, and NPN output stage. Its reference node (REF) senses external resistor divider voltage, triggering cathode current modulation to maintain VREF = 2.495 V ±1 % over temperature and load.
It operates with 1 mA to 100 mA sink current, exhibits 9 mV typical reference drift from 0 °C to 70 °C, and delivers low-noise regulation via 0.2 Ω dynamic output impedance. The device requires no external compensation for stability in standard feedback configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference voltage | 2.470 V to 2.520 V at 10 mA cathode current - defines tight output setpoint tolerance for precision regulation |
| Cathode current range | 1 mA to 100 mA - supports direct replacement of Zener diodes and enables high-accuracy current limiting |
| Dynamic impedance | 0.2 Ω typical - ensures minimal output voltage deviation under fast load transients |
| Temperature range | –40 °C to +85 °C - qualified for industrial and extended commercial environments |
| Reference current | 2.0 µA to 4.0 µA - determines minimum bias required for REF node without loading external divider |
| Output noise | Low - enables stable closed-loop performance in sensitive analog feedback paths |
| Max cathode-anode voltage | 36 V - sets upper limit for regulated output voltage when used with external resistors |
Pinout & Package
SOT23-3 plastic surface-mounted package with normal pinning configuration (pin 1 = Cathode, pin 2 = REF, pin 3 = Anode), footprint compliant with JEDEC TO-236AB, 1.3 mm × 2.9 mm × 1.1 mm body dimensions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Sink terminal carrying regulated current; connects to output node in shunt configuration |
| 2 (REF) | Reference input | High-impedance sense node for external resistor divider; controls regulation point |
| 3 (A) | Anode | Return path to ground or low-side rail; completes current loop with cathode |
Key Features
| Feature | Design Value |
|---|---|
| Programmable output voltage | 2.495 V to 36 V via two external resistors - eliminates need for multiple fixed-voltage references |
| A-grade reference tolerance | ±1.0 % at 25 °C - enables tighter output regulation than standard-grade TL431 variants |
| Low temperature drift | 9 mV over 0 °C to 70 °C - maintains accuracy across ambient variations without external trimming |
| Sharp turn-on characteristic | Active output stage with fast response - improves transient rejection vs. passive Zener solutions |
| ESD robustness | 4 kV HBM - withstands handling and board-level electrostatic discharge during assembly |
Applications
| Isolated SMPS Feedback | Precision Current Sink |
|---|---|
Use Scenario: Secondary-side voltage sensing in flyback or forward converters with optocoupler-coupled error signal. IC Role / Device Role / Timing Role: Shunt regulator providing stable 2.495 V reference to drive optocoupler LED, closing primary-side PWM loop. Use Value: Enables ±1 % output regulation across line/load/temperature while reducing component count vs. discrete op-amp + reference solutions. |
Use Scenario: Constant-current biasing of laser diodes or LED strings in instrumentation and lighting systems. IC Role / Device Role / Timing Role: Precision shunt element controlling current through external sense resistor and pass transistor. Use Value: Delivers 1 % current accuracy over –40 °C to +85 °C without calibration, replacing higher-cost DAC-based solutions. |
| Adjustable Linear Regulator | Overvoltage Protection Circuit |
Use Scenario: Programmable output voltage setting in low-noise LDOs or series-pass regulators using external PNP/MOSFET. IC Role / Device Role / Timing Role: Reference and error amplifier driving base/gate of pass element to regulate output. Use Value: Supports 2.495 V to 36 V output range with <0.2 Ω effective output impedance, improving load regulation vs. Zener-based designs. |
Use Scenario: Clamp circuit protecting downstream ICs from supply overvoltage events in automotive or industrial power rails. IC Role / Device Role / Timing Role: Fast-acting shunt element diverting excess current when sensed voltage exceeds threshold. Use Value: Responds within microseconds to overvoltage transients due to sharp turn-on, limiting peak voltage to ≤2.52 V above setpoint. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431CDBZR | 2.0 % reference tolerance, 0 °C to 70 °C temp range | Lower accuracy; suitable only for non-critical consumer supplies | Select when cost sensitivity outweighs regulation precision and extended temperature operation |
| TL431BCDBZR | 0.5 % reference tolerance, same –40 °C to 85 °C range | Higher accuracy but identical thermal and electrical envelope | Choose when tighter output stability is required without changing PCB layout or thermal design |
Compared with TL431CDBZR, TL431ACDBZR,215 provides 1 % tolerance and wider temperature range at moderate cost increase; versus TL431BCDBZR, it trades 0.5 % accuracy for lower unit price while retaining full industrial operating capability.
Availability
TL431ACDBZR,215 is available at Aetrix Electronics and suitable for isolated SMPS feedback, precision current sinking, and adjustable linear regulation requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for TL431ACDBZR,215 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Nexperia is a global semiconductor expert delivering high-performance logic, analog, and discrete components with focus on efficiency, reliability, and sustainability.
TL431ACDBZR,215 belongs to Nexperia's precision shunt regulator product line, engineered for accurate voltage referencing and current control in power management circuits across industrial, computing, and communications equipment.
FAQ
What is the maximum cathode-anode voltage for TL431ACDBZR,215?
The absolute maximum cathode-anode voltage is 37 V per datasheet limiting values. For reliable operation, the recommended maximum is 36 V under continuous conditions. Exceeding 37 V risks permanent damage regardless of current level or duration.
Does TL431ACDBZR,215 require external compensation in feedback loops?
No external compensation is required for stability in standard shunt regulator configurations. The device features inherent phase margin sufficient for use with typical optocoupler-based SMPS feedback networks and capacitive loads up to 100 nF, as verified in Figure 17 of the datasheet.
How does the REF pin current affect resistor divider design?
The REF pin draws 2.0 µA to 4.0 µA, so the upper resistor in the divider must be sized to keep divider current ≥10× that value (i.e., ≥40 µA) to avoid accuracy degradation. For example, with 12 V input, R1 + R2 should be ≤300 kΩ to maintain 1 % reference accuracy.
Is TL431ACDBZR,215 qualified for automotive applications?
No - although earlier revisions included AEC-Q100 qualification, Revision 8 (2025) explicitly states that TL431ACDBZR,215 is not qualified for automotive use. It remains suitable for industrial and commercial applications within its –40 °C to +85 °C rating.
TL431ACDBZR,215 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Adjustable
- Voltage - Output (Min/Fixed):
- 2.495V
- Voltage - Output (Max):
- 36 V
- Current - Output:
- 100 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- -
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 600 µA
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
TL431ACDBZR,215 FAQ
1.How can I place an order for TL431ACDBZR,215 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL431ACDBZR,215 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TL431ACDBZR,215 reliable?
The price and inventory of TL431ACDBZR,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL431ACDBZR,215 is usually 5 days.
3.What payment methods are accepted for TL431ACDBZR,215?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL431ACDBZR,215 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL431ACDBZR,215?
TL431ACDBZR,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL431ACDBZR,215 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TL431ACDBZR,215?
For technical support, including TL431ACDBZR,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL431ACDBZR,215 requirements.
6.How does Aetrix verify that TL431ACDBZR,215 is sourced from the original manufacturer or authorized distributors?
All TL431ACDBZR,215 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TL431ACDBZR,215 meets industry standards.
7.What is the process for return or replacement of TL431ACDBZR,215?
All TL431ACDBZR,215 units undergo pre-shipment inspection (PSI). If there is an issue with TL431ACDBZR,215, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TL431ACDBZR,215 part is unused and in its original packaging.
Return procedure for TL431ACDBZR,215:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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