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Nexperia USA Inc. TL431QDBZR,215
- Part No.:
- TL431QDBZR,215
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL431QDBZR,215.pdf
- Description:
- IC VREF SHUNT ADJ 2% TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:39,222
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Product details
Overview
TL431QDBZR,215 from Nexperia is a three-terminal adjustable precision shunt regulator with 0.5 % reference voltage tolerance (B-grade), 2.495 V nominal reference voltage, and cathode-anode voltage range up to 36 V. It operates across –40 °C to +125 °C, delivers 1 mA to 100 mA sink current, and features 0.2 Ω typical dynamic impedance-used in isolated SMPS feedback loops, precision current sinks, and programmable voltage references.
For engineers reviewing the TL431QDBZR,215 datasheet, TL431QDBZR,215 pinout, TL431QDBZR,215 application, or TL431QDBZR,215 equivalent, this page provides verified pin mapping, B-grade tolerance validation, thermal derating curves for SOT23 mounting, and direct substitution guidance for automotive-qualified shunt regulation designs.
Technical Context
The TL431QDBZR,215 implements an internal bandgap reference and transconductance amplifier driving an NPN output stage, enabling precise shunt regulation via external resistor dividers. Its B-grade 0.5 % Vref tolerance (2483–2507 mV at 25 °C) and <±34 mV temperature drift over –40 °C to +125 °C support high-stability feedback in industrial power converters.
It exhibits low dynamic impedance (0.2 Ω typ.) and sharp turn-on behavior, making it functionally distinct from Zener diodes by delivering stable regulation without minimum current dependency beyond 0.4 mA IK(min). The device supports AEC-Q100 Grade 1 qualification per revision history v.8 (2025).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference voltage (Vref) | 2483–2507 mV at 25 °C; enables ±0.5 % output setting accuracy in closed-loop systems |
| Cathode-anode voltage (VKA) | 2.495 V to 36 V; sets maximum regulated output range using two external resistors |
| Cathode current (IK) | 1–100 mA; defines usable load/sink current range without thermal shutdown |
| Dynamic impedance (ZKA) | 0.2 Ω typical; ensures minimal output voltage deviation under fast load transients |
| Temperature range | –40 °C to +125 °C; validated for under-hood automotive and industrial ambient conditions |
| Reference current (Iref) | 2–4 μA; determines minimum bias current required for REF pin stability |
| Output noise | Low (not quantified numerically but specified as "low output noise" in Features); reduces ripple in sensitive analog feedback paths |
Pinout & Package
SOT23-3 plastic surface-mounted package (3.0 × 1.4 × 1.1 mm), standard pinning configuration per Table 3 and Figure 27: Pin 1 = Cathode (K), Pin 2 = Reference (REF), Pin 3 = Anode (A).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - K (Cathode) | Current sink output terminal | Connects to regulated node; carries full load current; requires heatsinking above 100 mA |
| 2 - REF (Reference) | High-impedance voltage sense input | Accepts resistor divider feedback; draws only 2–4 μA; must be decoupled with ≤100 pF for SMPS stability |
| 3 - A (Anode) | Return path to ground or low-side rail | Completes shunt current path; solder pad area impacts thermal resistance (Rth(j-a) = 132–360 K/W) |
Key Features
| Feature | Design Value |
|---|---|
| Programmable output voltage | Set from 2.495 V to 36 V using two external resistors-enables single-part reuse across multiple output rails |
| B-grade 0.5 % Vref tolerance | 2483–2507 mV at 25 °C-reduces calibration overhead in precision power supplies and battery management |
| Sharp turn-on characteristic | Enables clean switching between regulation states-critical for comparator-mode applications like overvoltage detection |
| AEC-Q100 Grade 1 qualified | Validated for automotive ambient temperatures (–40 °C to +125 °C)-supports use in engine control and ADAS power stages |
| Low dynamic impedance | 0.2 Ω typical-maintains regulation during rapid load steps without external compensation |
Applications
| Isolated SMPS Feedback | Precision Current Sink |
|---|---|
Use Scenario: Secondary-side voltage sensing in flyback or forward converters with optocoupler-coupled feedback. IC Role / Device Role / Timing Role: Shunt regulator providing error signal to optocoupler LED, closing voltage loop across isolation barrier. Use Value: 0.5 % Vref tolerance and low ZKA ensure ±1 % output regulation accuracy despite transformer winding tolerance and optocoupler CTR variation. |
Use Scenario: Constant-current biasing of laser diodes or LED strings in automotive lighting modules. IC Role / Device Role / Timing Role: Precision shunt element controlling current through external pass transistor or directly sinking load current. Use Value: Stable 2.495 V reference and <±34 mV tempco enable ±1.5 % current accuracy from –40 °C to +125 °C without trimming. |
| Programmable Voltage Reference | Overvoltage Protection Comparator |
Use Scenario: Adjustable reference for ADCs, DACs, or microcontroller analog peripherals in industrial data acquisition systems. IC Role / Device Role / Timing Role: Programmable Vref source set by resistor divider; replaces fixed-voltage references to support multi-range inputs. Use Value: B-grade tolerance and low drift allow single-reference design covering 3.3 V, 5 V, and 12 V ranges with <0.1 % error contribution. |
Use Scenario: Monitoring battery pack voltage in EV battery management systems to trigger disconnect on overvoltage. IC Role / Device Role / Timing Role: Comparator with temperature-compensated threshold (Vref = 2.495 V) driving external MOSFET gate. Use Value: Sharp turn-on and AEC-Q100 qualification ensure reliable trip point activation within 100 ns across full automotive temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable shunt regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431BIDBZR | Same B-grade tolerance and SOT23 package, but rated for –40 °C to +85 °C (vs. +125 °C) | Limited to commercial/industrial ambient; unsuitable for under-hood automotive use | Select when operating ambient stays below 85 °C and cost optimization is prioritized |
| TL431AQDBZR | A-grade (1 %) tolerance, same temperature range (–40 °C to +125 °C), identical pinout | Lower accuracy than TL431QDBZR,215; higher Vref drift (±34 mV vs. ±34 mV, but wider min/max spread) | Choose where 1 % regulation is sufficient and tighter thermal drift is not required |
Compared with TL431AQDBZR (1 %) and TL431BIDBZR (B-grade, 85 °C), TL431QDBZR,215 uniquely combines 0.5 % tolerance, full automotive temperature range, and AEC-Q100 Grade 1 qualification-making it the only option for high-accuracy, under-hood shunt regulation.
Availability
TL431QDBZR,215 is available at Aetrix Electronics and suitable for isolated SMPS feedback, precision current sinks, and programmable voltage references requiring stable component supply across automotive and industrial production cycles.
Supply support for TL431QDBZR,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 essential efficiency technologies, delivering high-performance logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.
TL431QDBZR,215 belongs to Nexperia's precision shunt regulator product line, engineered specifically for high-accuracy, thermally robust voltage regulation in safety-critical automotive power systems and industrial SMPS designs.
FAQ
What is the maximum cathode-anode voltage for TL431QDBZR,215?
The absolute maximum cathode-anode voltage (VKA) is 37 V per Table 6. The recommended operating range is 2.495 V to 36 V. Exceeding 37 V risks permanent damage due to junction breakdown, and operation above 36 V violates recommended conditions even if below absolute max.
Does TL431QDBZR,215 require an external capacitor on the REF pin?
Yes-a small capacitor (~100 pF) is recommended directly at the REF pin to suppress high-frequency noise injection, especially in isolated SMPS feedback applications (Figure 26). Larger capacitors (>1 nF) may cause instability or oscillation depending on cathode current and load capacitance.
How does the 0.5 % Vref tolerance impact output voltage accuracy in a resistor-divider configuration?
With two external resistors (R1, R2), output voltage is VOUT = Vref × (1 + R1/R2). A 0.5 % Vref tolerance contributes directly to overall accuracy; e.g., with 1 % resistor tolerances, total error remains ≤2.5 % worst-case-enabling untrimmed designs for most industrial power rails.
Is TL431QDBZR,215 pin-compatible with legacy TL431 variants from other manufacturers?
Yes-TL431QDBZR,215 uses standard SOT23-3 pinning (K-REF-A), matching TI, ON Semiconductor, and STMicroelectronics TL431 offerings. However, its B-grade tolerance, AEC-Q100 qualification, and thermal specs differ; electrical validation is required before drop-in replacement in existing designs.
TL431QDBZR,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:
- ±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)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
TL431QDBZR,215 FAQ
1.How can I place an order for TL431QDBZR,215 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL431QDBZR,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 TL431QDBZR,215 reliable?
The price and inventory of TL431QDBZR,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL431QDBZR,215 is usually 5 days.
3.What payment methods are accepted for TL431QDBZR,215?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL431QDBZR,215 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL431QDBZR,215?
TL431QDBZR,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL431QDBZR,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 TL431QDBZR,215?
For technical support, including TL431QDBZR,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL431QDBZR,215 requirements.
6.How does Aetrix verify that TL431QDBZR,215 is sourced from the original manufacturer or authorized distributors?
All TL431QDBZR,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 TL431QDBZR,215 meets industry standards.
7.What is the process for return or replacement of TL431QDBZR,215?
All TL431QDBZR,215 units undergo pre-shipment inspection (PSI). If there is an issue with TL431QDBZR,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 TL431QDBZR,215 part is unused and in its original packaging.
Return procedure for TL431QDBZR,215:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL431QDBZR,215 Tags
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