My Inquiry
My Account
Nexperia USA Inc. TL431AQDBZR,215
- Part No.:
- TL431AQDBZR,215
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL431AQDBZR,215.pdf
- Description:
- IC VREF SHUNT ADJ 1% TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:177,208
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TL431AQDBZR,215 from Nexperia is an A-grade (±1.0 %) adjustable precision shunt regulator in SOT23 package, featuring 2.495 V reference voltage, 1 mA to 100 mA sink current capability, and operation across –40 °C to 125 °C. It functions as a programmable voltage reference or error amplifier in feedback loops of isolated DC-DC converters and precision current sinks.
For engineers reviewing the TL431AQDBZR,215 datasheet, TL431AQDBZR,215 pinout, TL431AQDBZR,215 application, or TL431AQDBZR,215 equivalent, key selection criteria include reference tolerance (1.0 %), thermal drift (≤34 mV over –40 °C to 125 °C), dynamic impedance (0.2 Ω), cathode-anode voltage range (2.495 V to 36 V), and automotive-grade qualification status per revision history.
Technical Context
The TL431AQDBZR,215 implements a bandgap-based 2.495 V reference with internal error amplifier and NPN output stage, enabling precise shunt regulation via external resistor divider. Its three-terminal architecture (anode, cathode, reference) supports both shunt and series configurations without external biasing components.
It delivers stable regulation under varying load and line conditions, with typical output impedance of 0.2 Ω and reference current ≤4 μA. The device operates with cathode-anode voltage from Vref up to 36 V and maintains ±1.0 % reference accuracy across –40 °C to 125 °C ambient temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference voltage (Vref) | 2.495 V nominal; ±1.0 % tolerance ensures 2.470–2.520 V accuracy at 10 mA cathode current and 25 °C. |
| Cathode-anode voltage (VKA) | 2.495 V to 36 V operating range; enables direct use in 5 V–36 V power rails without external level shifting. |
| Cathode current (IK) | 1 mA to 100 mA sink capability; supports low-power biasing and high-current shunt regulation in SMPS feedback paths. |
| Dynamic impedance (ZKA) | 0.2 Ω typical; ensures minimal output voltage variation under fast load transients in closed-loop control systems. |
| Reference current (Iref) | 2.0–4.0 μA; ultra-low input bias enables high-resistance feedback dividers without significant error contribution. |
| Temperature range | –40 °C to +125 °C; qualified for under-hood automotive and industrial environments per revision v.8 (2025). |
| Output noise | Low-noise design; avoids signal corruption in precision analog feedback and sensing applications. |
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/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - K (Cathode) | Current sink output terminal | Connects to regulated node (e.g., SMPS optocoupler anode or series pass transistor base); carries full load current. |
| 2 - REF (Reference) | High-impedance voltage sense input | Interfaces with resistor divider; draws ≤4 μA, enabling >1 MΩ feedback networks without accuracy loss. |
| 3 - A (Anode) | Current return path | Connected to system ground or low-side return; completes shunt current path and sets reference potential. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable output voltage | Set from 2.495 V to 36 V using two external resistors; eliminates need for multiple fixed-voltage references. |
| A-grade reference tolerance | ±1.0 % over full temperature range; reduces calibration overhead in production test and improves long-term stability. |
| Low dynamic impedance | 0.2 Ω typical; maintains tight regulation during rapid load steps in isolated flyback or forward converter feedback loops. |
| Wide operating temperature | –40 °C to +125 °C; supports automotive engine control units, industrial PLCs, and outdoor power electronics. |
| ESD robustness | 4 kV HBM rating; withstands handling and board assembly without additional protection circuitry. |
Applications
| Isolated SMPS Feedback | Precision Current Sink |
|---|---|
Use Scenario: Secondary-side voltage regulation in flyback converters with optocoupler isolation. IC Role / Device Role / Timing Role: Error amplifier and reference in closed-loop feedback path; compares sensed output voltage against internal 2.495 V reference. Use Value: Enables ±1.0 % output regulation across line/load/temperature; replaces discrete Zener + op-amp solutions with single-component reliability. |
Use Scenario: Constant-current source for LED biasing or sensor excitation in industrial instrumentation. IC Role / Device Role / Timing Role: Shunt-regulated current sink; fixes voltage across sense resistor to set precise current magnitude. Use Value: Delivers stable 1–100 mA current with <0.2 Ω effective output resistance, minimizing drift due to supply variation. |
| Adjustable Voltage Reference | Overvoltage Protection Threshold |
Use Scenario: Programmable reference for ADCs, DACs, or comparator circuits requiring user-tunable trip points. IC Role / Device Role / Timing Role: Precision voltage source referenced to ground; configured via external R1/R2 divider. Use Value: Provides 2.495–36 V output with ±1.0 % accuracy and <34 mV total drift over –40 °C to 125 °C. |
Use Scenario: Adjustable overvoltage detection in battery management or DC bus monitoring systems. IC Role / Device Role / Timing Role: Comparator input reference; triggers shutdown when sensed voltage exceeds programmed threshold. Use Value: Enables field-programmable trip points (e.g., 12.5 V, 24.2 V) with sub-1 % hysteresis control via resistor ratio. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431ACDBZR | Same A-grade tolerance (±1.0 %) but rated for 0 °C to 70 °C only; lower max junction temperature. | Limited to commercial-grade applications; unsuitable for under-hood or extended-temperature industrial use. | Select when cost sensitivity outweighs wide-temperature requirement and ambient stays below 70 °C. |
| TL431BQDBZR | B-grade (±0.5 %) tolerance; identical SOT23 package and –40 °C to 125 °C rating. | Higher precision required for metrology or high-end power supplies where 0.5 % reference accuracy is mandatory. | Choose when tighter reference stability justifies premium pricing and layout allows same footprint. |
Compared with TL431ACDBZR, TL431AQDBZR,215 adds extended temperature support without sacrificing accuracy; versus TL431BQDBZR, it trades 0.5 % tolerance for broader availability and lower unit cost while retaining full automotive-qualified operation.
Availability
TL431AQDBZR,215 is available at Aetrix Electronics and suitable for isolated SMPS feedback, precision current sinking, and adjustable voltage reference applications requiring stable component supply across automotive, industrial, and telecom power designs.
Supply support for TL431AQDBZR,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, reliable discrete, logic, and MOSFET devices with focus on efficiency, miniaturization, and automotive qualification.
The TL431 family belongs to Nexperia's precision analog portfolio, engineered specifically for voltage regulation, feedback control, and current limiting in space-constrained, thermally demanding power systems.
FAQ
What is the maximum cathode-anode voltage for TL431AQDBZR,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 requires derating and thermal validation per Figure 2 power curves.
Does TL431AQDBZR,215 require external compensation in SMPS feedback?
No external compensation is required for basic shunt regulation, but a 100 pF capacitor at the REF pin is recommended per Figure 26 to suppress switching noise injection from the primary side in isolated topologies. Larger capacitors may cause instability depending on loop gain.
Can TL431AQDBZR,215 replace a Zener diode directly?
Yes - it functions as a 2.495 V Zener with superior characteristics: sharp turn-on, low dynamic impedance (0.2 Ω vs. typical Zener's 10–100 Ω), and programmable voltage up to 36 V. Pin-compatible replacement requires matching SOT23 orientation and verifying cathode/anode/ref connections.
Is TL431AQDBZR,215 qualified for automotive use?
Per Revision 8 (September 2025) datasheet, TL431AQDBZR,215 is listed among products changed to standard qualification - meaning it no longer holds active AEC-Q100 grade-1 certification. It remains rated for –40 °C to 125 °C but is not formally qualified for automotive safety-critical applications.
TL431AQDBZR,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:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
TL431AQDBZR,215 FAQ
1.How can I place an order for TL431AQDBZR,215 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL431AQDBZR,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 TL431AQDBZR,215 reliable?
The price and inventory of TL431AQDBZR,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL431AQDBZR,215 is usually 5 days.
3.What payment methods are accepted for TL431AQDBZR,215?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL431AQDBZR,215 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL431AQDBZR,215?
TL431AQDBZR,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL431AQDBZR,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 TL431AQDBZR,215?
For technical support, including TL431AQDBZR,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL431AQDBZR,215 requirements.
6.How does Aetrix verify that TL431AQDBZR,215 is sourced from the original manufacturer or authorized distributors?
All TL431AQDBZR,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 TL431AQDBZR,215 meets industry standards.
7.What is the process for return or replacement of TL431AQDBZR,215?
All TL431AQDBZR,215 units undergo pre-shipment inspection (PSI). If there is an issue with TL431AQDBZR,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 TL431AQDBZR,215 part is unused and in its original packaging.
Return procedure for TL431AQDBZR,215:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL431AQDBZR,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…
