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Nexperia USA Inc. TL431BCDBZR,215
- Part No.:
- TL431BCDBZR,215
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL431BCDBZR,215.pdf
- Description:
- IC VREF SHUNT ADJ 0.5% TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:15,534
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Product details
Overview
TL431BCDBZR,215 from Nexperia is a B-grade (±0.5 %) adjustable precision shunt regulator in SOT23 package, featuring 2.495 V reference voltage, 0.2 Ω dynamic cathode-anode impedance, and 1–100 mA sink current capability. It operates across –40 °C to 125 °C and serves as a programmable voltage reference or error amplifier in isolated SMPS feedback loops.
For engineers reviewing the TL431BCDBZR,215 datasheet, TL431BCDBZR,215 pinout, TL431BCDBZR,215 application, or TL431BCDBZR,215 equivalent, key selection criteria include reference tolerance (0.5 %), thermal drift (≤34 mV over –40 °C to +125 °C), cathode current range, SOT23 pin compatibility, and suitability for precision current sinking or shunt regulation in industrial power supplies.
Technical Context
The TL431BCDBZR,215 implements a three-terminal shunt regulator architecture with an internal bandgap reference, error amplifier, and NPN output stage. Its reference voltage is set externally via two resistors between cathode, anode, and REF pins, enabling output programming from 2.495 V to 36 V.
It delivers sharp turn-on characteristics and low dynamic impedance (0.2 Ω typical), supporting stable operation in closed-loop feedback paths. The device maintains ±0.5 % reference accuracy at 10 mA cathode current and 25 °C, with guaranteed performance across –40 °C to +125 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage (Vref) | 2483–2507 mV at IK = 10 mA, 25 °C - defines minimum programmable output threshold |
| Reference Tolerance | ±0.5 % - enables high-accuracy voltage setting in precision feedback networks |
| Cathode Current Range | 1–100 mA - supports direct sinking of error signal currents without external amplification |
| Dynamic Cathode-Anode Impedance | 0.2 Ω typical - ensures minimal voltage perturbation under load transients in regulation loops |
| Temperature Range | –40 °C to +125 °C - qualified for extended industrial and under-hood applications |
| Output Noise | Low - enables clean reference generation without added filtering in sensitive analog circuits |
| ESD Rating | 4 kV HBM - provides robustness against handling and board-level electrostatic discharge |
Pinout & Package
SOT23 plastic surface-mounted package (3 leads), 1.9 mm × 1.1 mm footprint, 0.95 mm height, standard JEDEC MO-203AA outline. Thermal resistance Rth(j-a) = 360 K/W on FR4 PCB (standard footprint).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - K (Cathode) | Current sink output terminal | Connects to regulated rail or optocoupler anode in SMPS feedback; carries full error current |
| 2 - REF (Reference) | High-impedance sensing input | Monitors divided output voltage; draws only 2–4 µA, enabling high-resistance divider networks |
| 3 - A (Anode) | Return path and current source reference | Typically tied to system ground or low-side return; sets cathode-to-anode voltage compliance |
Key Features
| Feature | Design Value |
|---|---|
| Programmable output voltage up to 36 V | Enables single-part support for diverse supply rails using only two external resistors |
| B-grade reference tolerance (±0.5 %) | Reduces calibration overhead in factory-trimmed power modules and industrial controllers |
| Typical output impedance: 0.2 Ω | Minimizes gain error in feedback loops and improves transient response stability |
| Sink current capability: 1–100 mA | Directly drives optocoupler LEDs or small MOSFET gates without buffer stages |
| Low reference current (2–4 µA) | Permits use of >1 MΩ resistor dividers, reducing power loss and noise coupling |
Applications
| Isolated SMPS Feedback | Precision Shunt Regulator |
|---|---|
|
Use Scenario: Secondary-side voltage sensing in flyback or forward converters with optocoupler-coupled feedback. IC Role / Device Role / Timing Role: Error amplifier and reference comparator driving optocoupler LED current. Use Value: Enables ±0.5 % output regulation accuracy across line/load/temperature while maintaining loop stability with <100 pF compensation. |
Use Scenario: Low-cost, adjustable 3.3 V or 5 V local regulation for microcontrollers or sensors. IC Role / Device Role / Timing Role: Adjustable shunt element replacing Zener diodes in series-pass or parallel-regulated topologies. Use Value: Delivers tighter voltage tolerance and lower dynamic impedance than discrete Zeners, improving load regulation by >10×. |
| Precision Constant Current Sink | Programmable Threshold Comparator |
|
Use Scenario: LED biasing or sensor excitation requiring stable current independent of supply variation. IC Role / Device Role / Timing Role: Two-resistor-configured current sink with REF pin as virtual ground node. Use Value: Achieves <±1 % current accuracy over temperature using only passive components-no op-amp needed. |
Use Scenario: Overvoltage detection or battery charge termination with temperature-compensated trip point. IC Role / Device Role / Timing Role: Single-supply comparator with Vref = 2.495 V as stable, low-drift threshold reference. Use Value: Eliminates need for external voltage reference IC; trip point drift limited to ≤34 mV over –40 °C to +125 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431ACDBZR | 1 % reference tolerance, 0 °C to +70 °C temp range, same SOT23 normal pinning | Lower accuracy and narrower temperature range; suitable for commercial-grade power supplies | Select when cost sensitivity outweighs industrial temperature or precision requirements |
| TL431BIDBZR | 0.5 % tolerance, –40 °C to +85 °C rating, mirrored pinning (REF/K/A vs K/REF/A) | Same precision but different pinout; requires PCB layout revision if substituting | Choose only if existing design uses mirrored SOT23 footprint and ambient stays ≤85 °C |
Compared with TL431ACDBZR, TL431BCDBZR,215 offers tighter tolerance and wider temperature range at identical package size; versus TL431BIDBZR, it provides identical electrical specs but avoids pinout rework due to normal SOT23 configuration.
Availability
TL431BCDBZR,215 is available at Aetrix Electronics and suitable for industrial power supplies, isolated DC-DC converters, and precision current sources requiring stable component supply with guaranteed long-term continuity.
Supply support for TL431BCDBZR,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 focused on high-volume, high-reliability logic, discrete, and power MOSFET solutions, headquartered in Nijmegen, Netherlands.
The TL431 family is part of Nexperia's precision analog portfolio, designed specifically for voltage reference, shunt regulation, and feedback control in cost-sensitive yet thermally demanding industrial and consumer power systems.
FAQ
What is the maximum cathode-anode voltage for TL431BCDBZR,215?
The absolute maximum cathode-anode voltage is 37 V per IEC 60134 limiting values. Recommended operating range is 2.495 V to 36 V. Exceeding 37 V risks permanent damage; operation above 36 V violates recommended conditions and may degrade reference stability or increase leakage.
Does TL431BCDBZR,215 require an external capacitor on the REF pin?
A 100 pF capacitor is recommended at the REF pin in SMPS feedback applications to suppress high-frequency switching noise coupling into the reference node. In non-switching shunt regulator use, it is optional but improves noise immunity when routing traces near noisy signals.
Can TL431BCDBZR,215 replace a Zener diode directly?
Yes-it functions as a 2.495 V Zener with programmable breakdown voltage, superior temperature stability (±34 mV over –40 °C to +125 °C), and lower dynamic impedance (0.2 Ω vs typical Zener >10 Ω). No additional biasing is needed, but external resistors must be sized to ensure ≥0.4 mA minimum cathode current.
Is TL431BCDBZR,215 qualified for automotive use?
No-per Revision History v.8 (20250903), TL431BCDBZR,215 is not AEC-Q100 qualified. Automotive qualification was removed for all DBZR-suffixed variants including this part. Use TL431BQDBZR or TL431BFDT instead for grade-1 automotive applications.
TL431BCDBZR,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:
- ±0.5%
- 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
TL431BCDBZR,215 FAQ
1.How can I place an order for TL431BCDBZR,215 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL431BCDBZR,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 TL431BCDBZR,215 reliable?
The price and inventory of TL431BCDBZR,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL431BCDBZR,215 is usually 5 days.
3.What payment methods are accepted for TL431BCDBZR,215?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL431BCDBZR,215 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL431BCDBZR,215?
TL431BCDBZR,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL431BCDBZR,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 TL431BCDBZR,215?
For technical support, including TL431BCDBZR,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL431BCDBZR,215 requirements.
6.How does Aetrix verify that TL431BCDBZR,215 is sourced from the original manufacturer or authorized distributors?
All TL431BCDBZR,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 TL431BCDBZR,215 meets industry standards.
7.What is the process for return or replacement of TL431BCDBZR,215?
All TL431BCDBZR,215 units undergo pre-shipment inspection (PSI). If there is an issue with TL431BCDBZR,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 TL431BCDBZR,215 part is unused and in its original packaging.
Return procedure for TL431BCDBZR,215:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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