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Nexperia USA Inc. TL431IDBZR,215
- Part No.:
- TL431IDBZR,215
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL431IDBZR,215.pdf
- Description:
- IC VREF SHUNT ADJ 2% TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,211
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Product details
Overview
TL431IDBZR,215 from Nexperia is a three-terminal adjustable precision shunt regulator with 1.0 % reference voltage tolerance (2470–2520 mV at 10 mA), −40 °C to +85 °C operating temperature range, and SOT23 package. It functions as a programmable voltage reference or shunt regulator in feedback loops of isolated DC-DC converters, precision current sinks, and overvoltage protection circuits.
For engineers reviewing the TL431IDBZR,215 datasheet, TL431IDBZR,215 pinout, TL431IDBZR,215 application, or TL431IDBZR,215 equivalent, key selection criteria include reference accuracy grade, cathode current capability (1–100 mA), dynamic impedance (0.2 Ω typical), thermal drift (±17 mV over −40 °C to +85 °C), and SOT23 pin compatibility with standard PCB footprints.
Technical Context
The TL431IDBZR,215 implements an internally compensated bandgap reference with high-gain error amplifier and NPN output stage, enabling sharp turn-on and stable regulation across 2.495 V to 36 V via two external resistors. Its functional diagram shows direct cathode–anode–reference terminal topology without internal pass transistors or enable logic.
It operates as a 3-terminal shunt device: the REF pin senses voltage, the cathode (K) sinks current to maintain VREF, and the anode (A) serves as return path. No external compensation is required for basic shunt operation, though 100 pF at REF is recommended in SMPS feedback paths to suppress switching noise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference voltage (VREF) | 2470–2520 mV at 10 mA (A-grade accuracy enables ±12.5 mV system-level voltage setpoint error) |
| Cathode current range | 1–100 mA (supports direct regulation of up to ~250 mW load power at 2.5 V drop) |
| Dynamic impedance (ZKA) | 0.2 Ω typical (ensures <1 mV output variation per 0.2 mA load step, critical for feedback stability) |
| Reference current (IREF) | 2–4 μA (low bias current minimizes resistor-divider loading error in high-impedance setpoint networks) |
| Temp. drift (ΔVREF) | ±17 mV over −40 °C to +85 °C (equivalent to ~69 ppm/°C, suitable for industrial-grade closed-loop control) |
| Cathode–anode voltage (VKA) | 2.495–36 V (enables wide-range output programming without external series pass devices) |
| ESD rating (HBM) | 4 kV (robust handling during board assembly and field service) |
Pinout & Package
SOT23 plastic surface-mounted package (3 leads), 1.9 mm × 1.3 mm footprint, 0.95 mm height, standard JEDEC MO-203AA outline. Thermal resistance Rth(j-a) = 360 K/W on FR4 PCB (standard footprint).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - K (Cathode) | Current sink output | Primary regulated node; connects to supply rail or SMPS optocoupler LED anode; must handle full load current |
| 2 - REF (Reference) | Voltage sense input | High-impedance node (2–4 μA bias); connects to resistor divider midpoint; sensitive to noise coupling |
| 3 - A (Anode) | Current return path | Low-impedance ground reference for internal amplifier; ties to system ground or negative rail |
Key Features
| Feature | Design Value |
|---|---|
| Programmable output voltage | 2.495 V to 36 V using only two external resistors-eliminates need for multiple fixed-voltage references |
| A-grade reference tolerance | ±1.0 % (2470–2520 mV) ensures tighter system-level voltage regulation than standard-grade (±2.0 %) parts |
| Low dynamic impedance | 0.2 Ω typical enables stable regulation under fast transient loads without external capacitance |
| Wide operating temperature | −40 °C to +85 °C supports industrial and telecom applications without derating or thermal compensation |
| Low reference current | 2–4 μA allows use of high-value resistor dividers (e.g., 1 MΩ/100 kΩ), reducing power loss and heat generation |
Applications
| Isolated SMPS Feedback | 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 driving optocoupler LED; sets precise error threshold for primary-side PWM controller. Use Value: 1.0 % VREF tolerance directly translates to ±1.25 % output voltage accuracy across line/load/temperature, meeting telecom and industrial PSU specs. |
Use Scenario: Constant-current source for LED biasing or sensor excitation in battery-powered instrumentation. IC Role / Device Role / Timing Role: Adjustable shunt element controlling current through external sense resistor and load. Use Value: 0.2 Ω dynamic impedance ensures current stability within ±0.5 % over 10:1 load variation, independent of supply ripple. |
| Overvoltage Protection | Programmable Voltage Monitor |
|
Use Scenario: Clamp circuit protecting downstream ICs from supply rail overvoltage events in automotive body electronics. IC Role / Device Role / Timing Role: Fast-turn-on shunt regulator triggering crowbar or shutdown when VIN exceeds preset threshold. Use Value: Sharp turn-on characteristic (typical 1 µs response) and 4 kV HBM ESD rating ensure reliable fault detection without false triggers. |
Use Scenario: Threshold detector in power sequencer for FPGA or ASIC supply rails requiring precise startup sequencing. IC Role / Device Role / Timing Role: Precision comparator with temperature-compensated reference, replacing discrete Zener+op-amp solutions. Use Value: ±17 mV VREF drift over −40 °C to +85 °C guarantees consistent trip point across environmental conditions, eliminating calibration drift. |
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 accuracy but rated for 0 °C to +70 °C ambient; 9 mV max temp drift vs. 17 mV for TL431IDBZR,215 | Limited to commercial-temperature applications; unsuitable for extended industrial environments | Select when cost sensitivity outweighs temperature range requirement and ambient stays above 0 °C |
| TL431BIDBZR | B-grade (0.5 %) accuracy: 2483–2507 mV; identical −40 °C to +85 °C range and SOT23 pinout | Higher precision for metrology or medical-grade supplies where ±0.625 mV setpoint error is mandatory | Choose when tighter reference tolerance justifies higher unit cost and no additional thermal derating is needed |
Compared with TL431ACDBZR, TL431IDBZR,215 trades 0.5 % wider VREF tolerance for 15 °C lower minimum operating temperature and broader industrial suitability; compared with TL431BIDBZR, it offers 0.5 % relaxed accuracy at lower cost while retaining identical thermal and package compatibility.
Availability
TL431IDBZR,215 is available at Aetrix Electronics and suitable for isolated SMPS feedback, precision current limiting, and overvoltage protection circuits requiring stable component supply across industrial temperature ranges.
Supply support for TL431IDBZR,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 solutions with focus on efficiency, reliability, and miniaturization.
The TL431 family is part of Nexperia's precision analog portfolio, designed specifically for voltage reference, shunt regulation, and feedback control in power management systems across industrial, computing, and communications markets.
FAQ
What is the maximum cathode–anode voltage for TL431IDBZR,215?
The absolute maximum cathode–anode voltage 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 near 36 V requires verification of power dissipation limits and thermal derating on the target PCB layout.
Can TL431IDBZR,215 replace a Zener diode directly?
Yes-it functions as a 3-terminal active Zener replacement with superior characteristics: adjustable breakdown voltage (2.495–36 V), lower dynamic impedance (0.2 Ω vs. >10 Ω for typical Zeners), and tighter tolerance (1.0 % vs. 5–10 %). No external biasing is needed, but the REF pin must be connected to a resistor divider rather than left floating.
Does TL431IDBZR,215 require external compensation in SMPS feedback?
A 100 pF capacitor is recommended between REF and A (ground) in isolated SMPS applications to damp high-frequency switching noise injected from the primary side. No series RC compensation is required for basic loop stability, as the device's internal compensation supports unity-gain operation with typical optocoupler CTR and secondary-side capacitance.
Is TL431IDBZR,215 qualified for automotive use?
No-per Revision 8 (20250903) datasheet, TL431IDBZR,215 was removed from AEC-Q100 qualification status and is not approved for automotive applications. For automotive-grade equivalents, consider TL431AQDBZR or TL431BQDBZR, which retain grade 1 qualification and −40 °C to +125 °C operation.
TL431IDBZR,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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
TL431IDBZR,215 FAQ
1.How can I place an order for TL431IDBZR,215 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL431IDBZR,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 TL431IDBZR,215 reliable?
The price and inventory of TL431IDBZR,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL431IDBZR,215 is usually 5 days.
3.What payment methods are accepted for TL431IDBZR,215?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL431IDBZR,215 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL431IDBZR,215?
TL431IDBZR,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL431IDBZR,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 TL431IDBZR,215?
For technical support, including TL431IDBZR,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL431IDBZR,215 requirements.
6.How does Aetrix verify that TL431IDBZR,215 is sourced from the original manufacturer or authorized distributors?
All TL431IDBZR,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 TL431IDBZR,215 meets industry standards.
7.What is the process for return or replacement of TL431IDBZR,215?
All TL431IDBZR,215 units undergo pre-shipment inspection (PSI). If there is an issue with TL431IDBZR,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 TL431IDBZR,215 part is unused and in its original packaging.
Return procedure for TL431IDBZR,215:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL431IDBZR,215 Tags
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