My Inquiry
My Account
Nexperia USA Inc. TL431AIDBZR,215
- Part No.:
- TL431AIDBZR,215
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL431AIDBZR,215.pdf
- Description:
- IC VREF SHUNT ADJ 1% TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:43,804
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TL431AIDBZR,215 from Nexperia is an A-grade adjustable precision shunt regulator in SOT23 package, providing 1.0 % reference voltage tolerance (2.470 V to 2.520 V at 25 °C), 0.2 Ω typical dynamic cathode-anode impedance, and sink current capability from 1 mA to 100 mA. It operates across –40 °C to +85 °C and serves as a programmable voltage reference or error amplifier in isolated SMPS feedback loops.
For engineers reviewing the TL431AIDBZR,215 datasheet, TL431AIDBZR,215 pinout, TL431AIDBZR,215 application, or TL431AIDBZR,215 equivalent, key selection criteria include reference accuracy grade, thermal drift over industrial temperature range, cathode current compliance, dynamic impedance for loop stability, and SOT23 pin compatibility with legacy TL431 designs.
Technical Context
The TL431AIDBZR,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 and anode, enabling precise output voltage programming from 2.495 V up to 36 V.
It delivers sharp turn-on characteristics and low output noise, with typical temperature drift of 9 mV over 0 °C to 70 °C and 17–34 mV over –40 °C to +85 °C. The device supports stable operation with load capacitance up to 100 nF and exhibits <0.5 Ω dynamic impedance below 1 kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.470–2.520 V at 25 °C (A-grade 1.0 % tolerance; sets regulation threshold with external resistor divider) |
| Cathode-Anode Voltage Range | 2.495 V to 36 V (programmable output range; defines maximum regulated voltage capability) |
| Cathode Current Range | 1 mA to 100 mA (supports wide load current demands while maintaining regulation) |
| Dynamic Cathode-Anode Impedance | 0.2 Ω typical (enables fast transient response and stable feedback loop compensation) |
| Reference Current | 2.0–4.0 μA (low input bias enables high-impedance voltage sensing without loading divider) |
| Temperature Range | –40 °C to +85 °C (industrial-grade operation; validated for embedded power supply environments) |
| Output Noise | Low (no quantified RMS value specified, but explicitly cited as "low output noise" in features) |
Pinout & Package
SOT23-3 plastic surface-mounted package (3.0 mm × 1.4 mm × 1.1 mm); normal pinning configuration per Table 3 and Figure 27.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - K (Cathode) | Current sink output terminal | Connects to regulated rail or SMPS optocoupler anode; carries full load current; must handle ≥100 mA |
| 2 - REF (Reference) | High-impedance voltage sense input | Connects to resistor divider midpoint; draws only 2–4 μA; requires local 100 pF bypass for noise immunity |
| 3 - A (Anode) | Current return path | Typically tied to system ground or low-side return; completes shunt current path; low-impedance connection critical for stability |
Key Features
| Feature | Design Value |
|---|---|
| Programmable output voltage up to 36 V | Enables single-part support for multiple output rails (e.g., 3.3 V, 5 V, 12 V, 24 V) using only two external resistors |
| A-grade 1.0 % reference voltage tolerance | Reduces output voltage variation vs. standard-grade parts, improving system-level accuracy without trimming |
| Typical output impedance of 0.2 Ω | Minimizes load-regulation error and improves phase margin in closed-loop SMPS control designs |
| Sink current capability: 1 mA to 100 mA | Supports direct drive of optocouplers (e.g., PC817) and higher-current shunt applications without external transistors |
| Low reference current (2–4 μA) | Permits use of high-value resistor dividers (>1 MΩ), reducing power loss and thermal drift in precision references |
Applications
| Isolated SMPS Feedback Loop | Precision Shunt Regulator |
|---|---|
|
Use Scenario: Secondary-side voltage sensing in flyback or forward converters with optocoupler-based isolation. IC Role / Device Role / Timing Role: Error amplifier and programmable reference in feedback path; compares sensed output to internal Vref and drives optocoupler LED. Use Value: Enables ±1 % output regulation over line/load/temperature with minimal external components and no secondary-side LDO. |
Use Scenario: Low-cost, adjustable voltage clamp for microcontroller I/O protection or analog sensor biasing. IC Role / Device Role / Timing Role: Precision shunt element replacing Zener diodes; regulates node voltage by sinking excess current. Use Value: Delivers tighter voltage tolerance (1.0 %) and lower dynamic impedance than discrete Zeners, improving stability under varying load conditions. |
| Precision Constant Current Sink | Adjustable Series Pass Regulator |
|
Use Scenario: LED driver or sensor excitation circuit requiring stable current independent of supply variation. IC Role / Device Role / Timing Role: Reference-controlled current sink using REF and A terminals; sets current via sense resistor between K and A. Use Value: Achieves <1 % current accuracy over temperature due to matched internal reference and low ΔVref/ΔVKA (–1.0 to –2.0 mV/V). |
Use Scenario: Low-noise, adjustable linear regulator for analog subsystems where LDO dropout is unacceptable. IC Role / Device Role / Timing Role: Shunt-controlled series pass element; TL431 drives base/gate of external transistor to regulate output. Use Value: Supports >30 V input-to-output differential and avoids LDO quiescent current limitations while retaining 1 % reference accuracy. |
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 ambient range | Limited to commercial-temperature applications; unsuitable for industrial environments with extended cold/warm operation | Select when cost sensitivity outweighs temperature range requirement and board space allows same SOT23 footprint |
| TL431BIDBZR | B-grade 0.5 % tolerance (2.483–2.507 V), otherwise identical pinout, package, and temperature range | Higher accuracy enables tighter output regulation in high-end power supplies or metrology interfaces | Choose when system-level calibration budget is constrained and ±0.5 % reference error is required for compliance |
Compared with TL431ACDBZR, TL431AIDBZR,215 extends operational reliability to –40 °C, making it suitable for outdoor or industrial enclosures; versus TL431BIDBZR, it trades 0.5 % accuracy for broader availability and lower unit cost while retaining full functional compatibility.
Availability
TL431AIDBZR,215 is available at Aetrix Electronics and suitable for isolated SMPS feedback loops, precision shunt regulation, and constant-current sink circuits requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for TL431AIDBZR,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, reliable discrete and logic devices for automotive, industrial, and consumer markets.
TL431AIDBZR,215 belongs to Nexperia's precision analog shunt regulator product line, designed specifically for cost-sensitive yet accuracy-critical power management functions in non-automotive industrial systems.
FAQ
What is the maximum cathode-anode voltage for TL431AIDBZR,215?
The absolute maximum cathode-anode voltage (VKA) is 37 V per limiting values table. Recommended operating range is Vref to 36 V. Exceeding 37 V risks permanent damage; operation near 36 V requires thermal derating per Figure 2, especially on FR4 PCBs without enhanced copper area.
Does TL431AIDBZR,215 require an external capacitor on the REF pin?
Yes - a 100 pF ceramic capacitor is recommended directly at the REF pin to suppress high-frequency noise coupling from the primary side in SMPS applications. This prevents false triggering and improves loop stability, as noted in Figure 26 and Application Information section.
Can TL431AIDBZR,215 replace a Zener diode directly?
Yes, in most cases - it functions as a 2.5 V reference with programmable output, superior temperature stability, and lower dynamic impedance than typical Zeners. However, it requires a minimum cathode current of 0.4 mA (typical) to maintain regulation, unlike passive Zeners which conduct at any voltage above breakdown.
Is TL431AIDBZR,215 qualified for automotive use?
No - although some TL431 variants (e.g., TL431QDBZR) carry AEC-Q100 Grade 1 qualification, TL431AIDBZR,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 family.
TL431AIDBZR,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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
TL431AIDBZR,215 FAQ
1.How can I place an order for TL431AIDBZR,215 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL431AIDBZR,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 TL431AIDBZR,215 reliable?
The price and inventory of TL431AIDBZR,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL431AIDBZR,215 is usually 5 days.
3.What payment methods are accepted for TL431AIDBZR,215?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL431AIDBZR,215 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL431AIDBZR,215?
TL431AIDBZR,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL431AIDBZR,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 TL431AIDBZR,215?
For technical support, including TL431AIDBZR,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL431AIDBZR,215 requirements.
6.How does Aetrix verify that TL431AIDBZR,215 is sourced from the original manufacturer or authorized distributors?
All TL431AIDBZR,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 TL431AIDBZR,215 meets industry standards.
7.What is the process for return or replacement of TL431AIDBZR,215?
All TL431AIDBZR,215 units undergo pre-shipment inspection (PSI). If there is an issue with TL431AIDBZR,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 TL431AIDBZR,215 part is unused and in its original packaging.
Return procedure for TL431AIDBZR,215:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL431AIDBZR,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…
