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NXP Semiconductors TL431MSDT,215
- Part No.:
- TL431MSDT,215
- Manufacturer:
- NXP Semiconductors
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL431MSDT,215.pdf
- Description:
- IC VREF SHUNT ADJ 2% TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,995
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Product details
Overview
TL431MSDT,215 from Nexperia is a 2 % tolerance, adjustable precision shunt regulator in SOT23 package, operating from −40 °C to +125 °C, with reference voltage 2.44 V–2.55 V, dynamic impedance 0.2 Ω, and cathode current capability of 1–100 mA - used for isolated feedback loops in automotive-grade switch-mode power supplies.
For engineers reviewing the TL431MSDT,215 datasheet, TL431MSDT,215 pinout, TL431MSDT,215 application, or TL431MSDT,215 equivalent, this page delivers verified specifications, mirrored-pin SOT23 layout, AEC-Q100 Grade 1 qualification status, thermal derating curves, and direct alternatives for SMPS feedback design.
Technical Context
The TL431MSDT,215 implements a three-terminal shunt regulator architecture with internal bandgap reference and transconductance amplifier, enabling precise voltage regulation via external resistor divider. Its mirrored pinning (REF–K–A) distinguishes it from standard-pin variants and supports stable operation up to 125 °C ambient.
It features 0.2 Ω typical dynamic cathode-anode impedance below 1 kHz, 6 mV max reference voltage drift over −40 °C to +125 °C, and ESD robustness of 4 kV HBM - optimized for linear regulation and isolated SMPS feedback where stability under variable load capacitance is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage (Vref) | 2440–2550 mV at 10 mA cathode current - sets minimum output voltage threshold for adjustable regulation |
| Reference Tolerance | ±2 % - defines initial accuracy of regulated output without trimming |
| Operating Temperature | −40 °C to +125 °C - qualified for under-hood automotive and industrial environments |
| Cathode Current Range | 1–100 mA - determines maximum shunt power dissipation and external pass transistor drive capability |
| Dynamic Impedance (ZKA) | 0.2 Ω typical below 1 kHz - ensures tight regulation under fast load transients |
| AEC-Q100 Qualification | Grade 1 - validated for automotive applications requiring reliability at 125 °C junction temperature |
| ESD Rating | 4 kV HBM - protects against handling-induced electrostatic discharge during assembly |
Pinout & Package
SOT23 plastic surface-mounted package (TO-236AB), 3-pin, 1.3 mm × 2.9 mm footprint, 1.1 mm height - compatible with standard reflow and wave soldering profiles per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | REF | Reference input - connects to resistor divider midpoint; controls regulation point |
| 2 | K (Cathode) | Cathode output - sinks current to ground or return path; drives optocoupler LED in isolated SMPS |
| 3 | A (Anode) | Anode - connects to system ground or low-side return; completes shunt current path |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable Output Voltage | Programmable from 2.5 V to 36 V using two external resistors - replaces discrete Zener+transistor circuits |
| Mirrored Pin Configuration | REF–K–A pinout (vs. standard K–REF–A) - enables PCB layout optimization in high-density feedback paths |
| Low Output Impedance | 0.2 Ω typical - maintains regulation accuracy despite cathode current variations from 1 mA to 100 mA |
| High-Temperature Stability | Specified performance across −40 °C to +125 °C - supports engine control units and battery management systems |
| EMI-Robust Operation | Stable under load capacitance up to 100 nF at VKA > 10 V - reduces need for external compensation in noisy SMPS environments |
Applications
| Automotive SMPS Feedback | Industrial Precision Shunt Regulator |
|---|---|
Use Scenario: Isolated DC-DC converter in engine control module requiring stable 5 V rail under wide temperature and EMI conditions. IC Role / Device Role / Timing Role: Shunt regulator providing error signal to optocoupler in secondary-side feedback loop. Use Value: AEC-Q100 Grade 1 rating and 125 °C operation ensure functional safety compliance without derating. |
Use Scenario: On-board 3.3 V reference for sensor signal conditioning in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Adjustable shunt reference replacing fixed-voltage Zener diodes for improved accuracy and thermal stability. Use Value: ±2 % Vref tolerance and 0.2 Ω dynamic impedance enable <10 mV output variation across 0–100 mA load range. |
| Precision Current Sink | Overvoltage Protection Circuit |
Use Scenario: Constant-current LED driver for dashboard backlighting with thermal compensation. IC Role / Device Role / Timing Role: Precision current sink controlling LED brightness via REF terminal voltage setpoint. Use Value: 1–100 mA sink range and 6 mV max Vref drift allow stable current regulation across vehicle cabin temperature extremes. |
Use Scenario: Overvoltage clamp protecting microcontroller I/O pins in 12 V automotive accessory circuits. IC Role / Device Role / Timing Role: Shunt-based crowbar element triggered when input exceeds programmable threshold. Use Value: Fast turn-on characteristic and 37 V absolute max cathode-anode voltage provide robust transient suppression without external TVS dependency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431ACDBZR | 1 % reference tolerance, 0–70 °C temp range, standard pinning (K–REF–A) | Commercial-grade power supplies with tighter initial accuracy but no automotive qualification | Select when higher initial accuracy is required and extended temperature operation is not needed |
| TL431BMSDT | 0.5 % reference tolerance, mirrored pinning, same −40 °C to +125 °C range | High-precision automotive feedback where <10 mV total Vref error budget is mandatory | Choose for systems requiring best-in-class reference accuracy without changing PCB layout |
Compared with TL431MSDT,215, TL431ACDBZR trades automotive temperature range and mirrored pinout for tighter 1 % tolerance, while TL431BMSDT retains identical packaging and temperature rating but improves reference accuracy to ±0.5 % - enabling higher-precision feedback without layout revision.
Availability
TL431MSDT,215 is available at Aetrix Electronics and suitable for automotive power conversion, industrial sensor interfaces, and precision current regulation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TL431MSDT,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 leader in discrete, logic, and PowerMOS semiconductors, formed in 2017 from the former NXP Standard Products division, with focus on automotive, industrial, and computing markets.
The TL431MSDT,215 belongs to Nexperia's precision analog shunt regulator product line, designed specifically for high-reliability feedback control in automotive-grade switch-mode power supplies and industrial regulation systems.
FAQ
What is the pin configuration of TL431MSDT,215?
The TL431MSDT,215 uses mirrored pinning in SOT23: Pin 1 = REF, Pin 2 = K (cathode), Pin 3 = A (anode). This differs from standard-pin TL431 variants (K–REF–A) and must be accounted for in PCB layout to avoid functional failure. The TL431MSDT,215 datasheet confirms this configuration in Table 3 and Figure 39.
Is TL431MSDT,215 qualified for automotive use?
Yes, TL431MSDT,215 is AEC-Q100 qualified Grade 1, rated for operation from −40 °C to +125 °C ambient temperature and validated for automotive powertrain and body electronics. This qualification is explicitly stated in Section 11.1 and Table 6 of the official Nexperia datasheet for TL431MSDT,215.
What is the maximum cathode-anode voltage for TL431MSDT,215?
The absolute maximum cathode-anode voltage (VKA) for TL431MSDT,215 is 37 V, with recommended operating limit at 36 V. Exceeding 37 V risks permanent damage. This value is specified in Table 6 (Limiting Values) and Table 8 (Operating Conditions) of the TL431MSDT,215 datasheet.
How does TL431MSDT,215 differ from TL431SDT?
TL431MSDT,215 and TL431SDT share the same 2 % tolerance and −40 °C to +125 °C rating, but TL431MSDT,215 uses mirrored pinning (REF–K–A), whereas TL431SDT uses standard pinning (K–REF–A). Both are intended for linear applications, but pinout incompatibility prevents direct PCB substitution without layout change.
What is the typical dynamic impedance of TL431MSDT,215?
The typical dynamic cathode-anode impedance (ZKA) of TL431MSDT,215 is 0.2 Ω at frequencies below 1 kHz and cathode currents from 1 mA to 100 mA. This low impedance ensures minimal output voltage deviation during load transients and is confirmed in Table 10 (Characteristics) of the TL431MSDT,215 datasheet.
TL431MSDT,215 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- SOT-23 (TO-236AB)
TL431MSDT,215 FAQ
1.How can I place an order for TL431MSDT,215 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL431MSDT,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 TL431MSDT,215 reliable?
The price and inventory of TL431MSDT,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL431MSDT,215 is usually 5 days.
3.What payment methods are accepted for TL431MSDT,215?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL431MSDT,215 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL431MSDT,215?
TL431MSDT,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL431MSDT,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 TL431MSDT,215?
For technical support, including TL431MSDT,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL431MSDT,215 requirements.
6.How does Aetrix verify that TL431MSDT,215 is sourced from the original manufacturer or authorized distributors?
All TL431MSDT,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 TL431MSDT,215 meets industry standards.
7.What is the process for return or replacement of TL431MSDT,215?
All TL431MSDT,215 units undergo pre-shipment inspection (PSI). If there is an issue with TL431MSDT,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 TL431MSDT,215 part is unused and in its original packaging.
Return procedure for TL431MSDT,215:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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