My Inquiry
My Account
Nexperia USA Inc. TL431BQDBZR,215
- Part No.:
- TL431BQDBZR,215
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL431BQDBZR,215.pdf
- Description:
- IC VREF SHUNT ADJ 0.5% TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:15,688
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TL431BQDBZR,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 125 °C, delivering 2.483–2.507 V reference voltage at 10 mA cathode current, and supporting output programming from 2.495 V to 36 V via two external resistors - used in isolated SMPS feedback loops requiring tight voltage regulation.
For engineers reviewing the TL431BQDBZR,215 datasheet, TL431BQDBZR,215 pinout, TL431BQDBZR,215 application, or TL431BQDBZR,215 equivalent, this page delivers verified pin mapping, thermal derating curves, dynamic impedance behavior, reference current drift over temperature, and validated alternatives for automotive-qualified or industrial-grade shunt regulation designs.
Technical Context
The TL431BQDBZR,215 implements a three-terminal shunt topology with an internal bandgap reference, error amplifier, and NPN output stage. Its 0.2 Ω typical dynamic cathode-anode impedance and 2–4 μA reference current enable stable closed-loop control in optocoupler-coupled feedback paths.
It operates with 1 mA to 100 mA sink current, supports cathode-anode voltages up to 36 V, and maintains ±0.5 % reference accuracy over –40 °C to +125 °C - meeting AEC-Q100 Grade 1 requirements per revision history v.8 (2025).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference voltage (Vref) | 2.483–2.507 V at 10 mA, IK = 10 mA, Tamb = 25 °C - defines minimum programmable output threshold |
| Cathode current range | 1–100 mA - sets usable load-sinking capability without external buffering |
| Output impedance (ZKA) | 0.2 Ω typical, f < 1 kHz - ensures minimal voltage deviation under dynamic load transients |
| Reference current (Iref) | 2–4 μA - determines resistor network power loss and bias stability in high-impedance dividers |
| Temp. drift (ΔVref) | ±17–34 mV over –40 °C to +125 °C - constrains long-term setpoint error in wide-temperature environments |
| Cathode-anode voltage (VKA) | 2.495–36 V - defines maximum programmable output voltage with external resistor scaling |
| ESD rating (HBM) | 4 kV - supports handling in standard assembly lines without special ESD controls |
Pinout & Package
SOT23 plastic surface-mounted package (3 leads), 1.9 mm × 1.1 mm × 1.0 mm body, standard footprint per Fig. 28 (reflow soldering), with normal pinning configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - K (Cathode) | Sink output terminal | Connects to regulated node or optocoupler LED anode; carries full load current |
| 2 - REF (Reference) | Feedback input | High-impedance node sensing voltage divider output; requires low-noise routing |
| 3 - A (Anode) | Return path | Connected to system ground or low-side return; completes shunt current loop |
Key Features
| Feature | Design Value |
|---|---|
| 0.5 % reference voltage tolerance | Enables <10 mV absolute error in 2.5 V reference applications across full industrial temperature range |
| AEC-Q100 Grade 1 qualification | Validated for automotive powertrain and body electronics where ambient reaches +125 °C |
| 0.2 Ω dynamic output impedance | Reduces output voltage ripple by >20 dB vs. Zener diodes under 10–100 mA load steps |
| 1 mA minimum cathode current | Allows stable regulation down to ultra-low-power standby modes without auxiliary bias |
| 4 kV HBM ESD rating | Eliminates need for external protection in board-level ESD zones compliant with IEC 61000-4-2 Level 3 |
Applications
| Isolated SMPS Feedback | Precision Current Sink |
|---|---|
|
Use Scenario: Secondary-side voltage regulation in flyback converters using optocoupler isolation. 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 ensures ±1 % output voltage accuracy despite transformer winding ratio variation and optocoupler CTR drift. |
Use Scenario: Constant-current biasing of laser diodes in fiber-optic transceivers. IC Role / Device Role / Timing Role: Adjustable shunt element setting precise current through external sense resistor. Use Value: 2–4 μA reference current enables high-value resistor networks, reducing self-heating error in 10–100 mA sink applications. |
| Programmable Voltage Reference | Overvoltage Protection Threshold |
|
Use Scenario: Configurable reference for ADC monitoring or comparator trip points in battery management systems. IC Role / Device Role / Timing Role: Precision voltage source scaled by resistor divider to generate stable thresholds. Use Value: 9 mV typical tempco over 0–70 °C limits threshold drift to <0.4 % full-scale in 3.3 V ADC reference designs. |
Use Scenario: Input overvoltage detection in DC-DC front-end stages for industrial PLC modules. IC Role / Device Role / Timing Role: Comparator reference enabling fast shutdown when input exceeds safe limit. Use Value: 36 V max VKA allows direct connection to 24 V nominal rails with 50 % headroom, eliminating level-shifting components. |
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 | 1 % Vref tolerance, 0–70 °C temp range, same SOT23/normal pinning | Lower cost for commercial-grade power supplies where extended temperature is not required | Select when ambient stays below 70 °C and ±10 mV reference error is acceptable |
| TL431BIDBZR | Same 0.5 % Vref, but –40 °C to +85 °C rating and mirrored pinning (REF-K-A) | Requires PCB layout revision due to pin swap; suitable for legacy designs using MFDT-style footprints | Choose only if existing board uses mirrored pinout and temperature range ≤85 °C suffices |
Compared with TL431ACDBZR, TL431BQDBZR,215 trades wider temperature coverage (+125 °C) and tighter tolerance (0.5 %) for higher cost; versus TL431BIDBZR, it retains normal pinning and adds 40 °C higher max operating temperature - critical for under-hood automotive modules.
Availability
TL431BQDBZR,215 is available at Aetrix Electronics and suitable for isolated SMPS feedback, precision current sinking, programmable voltage references, and overvoltage protection circuits requiring stable component supply across automotive and industrial temperature ranges.
Supply support for TL431BQDBZR,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 devices, with leadership in logic, MOSFETs, diodes, and precision analog ICs.
TL431BQDBZR,215 belongs to Nexperia's precision shunt regulator product line, engineered for automotive-grade feedback stability, low-output-impedance regulation, and seamless replacement of Zener diodes in safety-critical power systems.
FAQ
What is the maximum cathode-anode voltage for TL431BQDBZR,215?
The absolute maximum cathode-anode voltage is 37 V per IEC 60134 limiting values, but recommended operating conditions specify 36 V. Exceeding 36 V risks violating thermal limits and degrading long-term reliability, especially above 125 °C junction temperature.
Does TL431BQDBZR,215 require an external capacitor on the REF pin?
Yes - a 100 pF capacitor is recommended at the REF pin to suppress high-frequency noise coupling from optocouplers or switching nodes, as shown in Figure 26 of the datasheet. Omitting it may cause instability or oscillation in isolated feedback loops.
Can TL431BQDBZR,215 be used in place of a Zener diode?
Yes - it replaces Zener diodes in applications needing better voltage accuracy, lower dynamic impedance, or adjustable output. Unlike Zeners, it requires ≥1 mA cathode current to regulate and has active error amplification, enabling sharper turn-on and lower temperature drift.
Is TL431BQDBZR,215 pin-compatible with TI's TL431 series?
No - while functionally similar, Nexperia's TL431BQDBZR,215 uses SOT23 with normal pinning (K-REF-A), whereas TI's TL431 variants commonly use TO-92 or SOIC packages with different pinouts. Direct substitution requires PCB redesign and validation of thermal performance.
TL431BQDBZR,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 ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
TL431BQDBZR,215 FAQ
1.How can I place an order for TL431BQDBZR,215 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL431BQDBZR,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 TL431BQDBZR,215 reliable?
The price and inventory of TL431BQDBZR,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL431BQDBZR,215 is usually 5 days.
3.What payment methods are accepted for TL431BQDBZR,215?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL431BQDBZR,215 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL431BQDBZR,215?
TL431BQDBZR,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL431BQDBZR,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 TL431BQDBZR,215?
For technical support, including TL431BQDBZR,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL431BQDBZR,215 requirements.
6.How does Aetrix verify that TL431BQDBZR,215 is sourced from the original manufacturer or authorized distributors?
All TL431BQDBZR,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 TL431BQDBZR,215 meets industry standards.
7.What is the process for return or replacement of TL431BQDBZR,215?
All TL431BQDBZR,215 units undergo pre-shipment inspection (PSI). If there is an issue with TL431BQDBZR,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 TL431BQDBZR,215 part is unused and in its original packaging.
Return procedure for TL431BQDBZR,215:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL431BQDBZR,215 Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
