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Nexperia USA Inc. TL431BIDBZR,215
- Part No.:
- TL431BIDBZR,215
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL431BIDBZR,215.pdf
- Description:
- IC VREF SHUNT ADJ 0.5% TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,390
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Product details
Overview
TL431BIDBZR,215 from Nexperia is a B-grade (±0.5 %) adjustable precision shunt regulator in SOT23 package, configured with normal pinning (K-REF-A), operating across –40 °C to +85 °C, delivering 2.483–2.507 V reference voltage at 10 mA cathode current, and supporting programmable output voltages up to 36 V via two external resistors - widely used in isolated SMPS feedback loops.
For engineers reviewing the TL431BIDBZR,215 datasheet, TL431BIDBZR,215 pinout, TL431BIDBZR,215 application, or TL431BIDBZR,215 equivalent, key selection criteria include reference voltage tolerance (0.5 %), cathode current range (1–100 mA), dynamic impedance (0.2 Ω), thermal stability over –40 °C to +85 °C, and SOT23 footprint compatibility for space-constrained power regulation designs.
Technical Context
The TL431BIDBZR,215 implements a three-terminal shunt regulator architecture with an internal bandgap reference, error amplifier, and NPN output stage, enabling precise voltage regulation through external resistor dividers. Its functional diagram shows REF as high-impedance input, K as current-sinking output, and A as return path - forming a closed-loop control node in feedback networks.
It operates as a voltage-controlled current sink: when REF voltage exceeds Vref (2.495 V), the device turns on and sinks cathode current to maintain regulation. Its sharp turn-on characteristic (typical ZKA = 0.2 Ω) and low output noise make it suitable for replacing Zener diodes in precision applications requiring stable reference behavior under varying load and temperature conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference voltage (Vref) | 2.483–2.507 V at IK = 10 mA, Tamb = 25 °C - defines regulation setpoint accuracy for feedback divider design |
| Cathode current range | 1–100 mA - determines minimum bias and maximum sink capability for stable regulation |
| Dynamic cathode-anode impedance | 0.2 Ω typical (<1 kHz) - ensures low AC impedance for high-frequency loop stability in SMPS controllers |
| Reference voltage tolerance | ±0.5 % (B-grade) - enables tighter output voltage tolerance in regulated supplies without trimming |
| Temperature range | –40 °C to +85 °C - supports industrial-grade operation without derating in ambient environments |
| Output voltage range | 2.495 V to 36 V - set by external R1/R2 divider, allowing flexible regulation in diverse supply topologies |
| Reference input current | 2–4 μA - imposes minimal loading on feedback divider, preserving accuracy in high-impedance networks |
Pinout & Package
SOT23 plastic surface-mounted package (3 leads), 1.9 mm × 1.3 mm footprint, 0.95 mm height, standard JEDEC MO-178 variant with gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - K (Cathode) | Current sink output | Primary current path; connects to SMPS optocoupler anode or series pass transistor base; must handle up to 100 mA |
| 2 - REF (Reference) | High-impedance sense input | Feedback node for external resistor divider; draws only 2–4 μA, enabling high-R divider networks |
| 3 - A (Anode) | Return path / ground reference | Common return for cathode current and reference circuit; ties to system ground or low-side of feedback network |
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 |
| B-grade reference tolerance | ±0.5 % at 25 °C - reduces output voltage drift in untrimmed power supplies |
| Low dynamic impedance | 0.2 Ω typical - maintains regulation stability under fast load transients and high-frequency switching noise |
| Sharp turn-on characteristic | Sub-10 mV hysteresis - enables clean threshold detection and reliable comparator-like behavior in protection circuits |
| Industrial temperature range | –40 °C to +85 °C - ensures consistent performance in embedded power modules and motor drives |
Applications
| Isolated SMPS Feedback Loop | Precision Current Sink |
|---|---|
Use Scenario: Secondary-side voltage sensing in flyback or forward converters with optocoupler isolation. IC Role / Device Role / Timing Role: Shunt regulator providing error signal to optocoupler LED, closing regulation loop across transformer barrier. Use Value: Enables ±1 % output voltage regulation without primary-side sensing; 0.5 % Vref tolerance directly improves overall output accuracy. |
Use Scenario: Constant-current source for LED biasing or sensor excitation in industrial analog front-ends. IC Role / Device Role / Timing Role: Precision current sink where REF senses voltage across sense resistor, K sinks controlled current. Use Value: Delivers stable 1–100 mA sink with <±0.5 % setpoint error, eliminating need for op-amp-based current sources. |
| Adjustable Linear Regulator | Overvoltage Protection Threshold |
Use Scenario: Programmable output voltage in low-noise linear regulators using PNP pass transistor. IC Role / Device Role / Timing Role: Reference and error amplifier driving pass element base; REF monitors output via divider, K controls base current. Use Value: Supports 2.5–36 V output with <0.5 % reference drift, improving line/load regulation over wide temperature range. |
Use Scenario: Voltage clamp in battery management or DC bus monitoring circuits. IC Role / Device Role / Timing Role: Comparator with temperature-compensated threshold; REF tied to monitored rail, K triggers crowbar or shutdown logic. Use Value: Provides stable 2.495 V threshold with <±0.5 % tolerance and <9 mV/°C drift, reducing false trips in harsh environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable shunt regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431ACDBZR | A-grade (±1.0 %) tolerance; 0–70 °C temp range; same SOT23 normal pinning | Lower accuracy and narrower temperature range - suitable for commercial-grade non-critical supplies | Select when cost sensitivity outweighs precision and extended temperature requirements |
| TL431IDBZR | Standard grade (±2.0 %); same –40 °C to +85 °C range; identical SOT23 normal pinning | Higher reference drift - acceptable where system-level calibration compensates for tolerance | Choose for legacy designs or cost-optimized industrial systems where ±2 % output tolerance is acceptable |
Compared with TL431ACDBZR and TL431IDBZR, the TL431BIDBZR,215 provides tighter reference accuracy (±0.5 % vs. ±1.0 % or ±2.0 %) and maintains that spec across –40 °C to +85 °C, making it optimal for uncalibrated, high-reliability power rails where output stability cannot be compromised.
Availability
TL431BIDBZR,215 is available at Aetrix Electronics and suitable for isolated SMPS feedback loops, precision current sinks, adjustable linear regulators, and overvoltage protection circuits requiring stable component supply and long-term manufacturability.
Supply support for TL431BIDBZR,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 discrete and analog components, headquartered in Nijmegen, Netherlands, with manufacturing in Asia and Europe.
The TL431 family belongs to Nexperia's precision analog portfolio, designed specifically for voltage reference and shunt regulation in power management subsystems across industrial, computing, and consumer applications.
FAQ
What is the maximum cathode-anode voltage for TL431BIDBZR,215?
The absolute maximum cathode-anode voltage (VKA) is 37 V per IEC 60134 limiting values. The recommended operating range is 2.495 V to 36 V. Exceeding 37 V risks permanent damage; operation above 36 V should be avoided in continuous use to ensure reliability and thermal safety.
Does TL431BIDBZR,215 require an external capacitor on the REF pin?
Yes - a small capacitor (~100 pF) is recommended at the REF input to damp high-frequency switching noise injected from the primary side in isolated SMPS applications. This prevents oscillation and improves loop stability without affecting DC regulation accuracy.
Can TL431BIDBZR,215 replace a Zener diode directly?
Yes, in most cases - it functions as a 2.495 V "programmable Zener" with superior characteristics: lower dynamic impedance (0.2 Ω vs. >10 Ω), sharper knee, lower temperature drift (9 mV/70 °C vs. >50 mV/70 °C), and adjustable output. External resistors are required to set voltage above 2.495 V.
Is TL431BIDBZR,215 qualified for automotive use?
No - although some TL431 variants (e.g., TL431QDBZR) carry AEC-Q100 Grade 1 qualification, TL431BIDBZR,215 is specified for industrial temperature range (–40 °C to +85 °C) and is not automotive-qualified. Its revision history confirms removal of automotive status for this part number.
TL431BIDBZR,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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
TL431BIDBZR,215 FAQ
1.How can I place an order for TL431BIDBZR,215 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL431BIDBZR,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 TL431BIDBZR,215 reliable?
The price and inventory of TL431BIDBZR,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL431BIDBZR,215 is usually 5 days.
3.What payment methods are accepted for TL431BIDBZR,215?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL431BIDBZR,215 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL431BIDBZR,215?
TL431BIDBZR,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL431BIDBZR,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 TL431BIDBZR,215?
For technical support, including TL431BIDBZR,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL431BIDBZR,215 requirements.
6.How does Aetrix verify that TL431BIDBZR,215 is sourced from the original manufacturer or authorized distributors?
All TL431BIDBZR,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 TL431BIDBZR,215 meets industry standards.
7.What is the process for return or replacement of TL431BIDBZR,215?
All TL431BIDBZR,215 units undergo pre-shipment inspection (PSI). If there is an issue with TL431BIDBZR,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 TL431BIDBZR,215 part is unused and in its original packaging.
Return procedure for TL431BIDBZR,215:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL431BIDBZR,215 Tags
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