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Nexperia USA Inc. TLVH431NIDBZR-QVL
- Part No.:
- TLVH431NIDBZR-QVL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TLVH431NIDBZR-QVL.pdf
- Description:
- IC VREF SHUNT 1.24V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,813
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Product details
Overview
TLVH431NIDBZR-Q from Nexperia is an AEC-Q100 grade 1 qualified adjustable precision shunt regulator in SOT23 package, with 1.0 % reference voltage tolerance (1228–1252 mV at 25 °C), −40 °C to +85 °C operating temperature range, and 0.1 Ω typical dynamic cathode-anode impedance. It functions as a programmable voltage reference or shunt regulator in automotive feedback loops and precision current sinks.
For engineers reviewing the TLVH431NIDBZR-Q datasheet, TLVH431NIDBZR-Q pinout, TLVH431NIDBZR-Q application, or TLVH431NIDBZR-Q equivalent, key selection criteria include its A-grade 1.0 % Vref tolerance, mirrored pinning (K-REF-A), 70 mA sink capability, and qualification for automotive power supply feedback and isolated SMPS control.
Technical Context
The TLVH431NIDBZR-Q implements a three-terminal shunt regulator architecture with internal bandgap reference and error amplifier, enabling precise output voltage setting from 1.24 V to 14 V via two external resistors. Its active output stage delivers sharp turn-on characteristics and low 0.1 Ω dynamic impedance below 1 kHz.
Designed for automotive environments, it features −40 °C to +85 °C operation, AEC-Q100 Grade 1 qualification, and stable performance across cathode currents from 80 μA to 70 mA. The mirrored pinning (Pin 1 = K, Pin 2 = REF, Pin 3 = A) distinguishes it from normal-pinned variants and affects PCB layout compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Vref tolerance | 1.0 % (1228–1252 mV @ 25 °C); enables high-accuracy voltage setting in feedback networks |
| Operating temp | −40 °C to +85 °C; supports under-hood automotive electronics without derating |
| Sink current | 0.08 mA to 70 mA; sufficient for driving optocoupler LEDs or biasing series pass transistors |
| ZKA (dynamic impedance) | 0.10–0.15 Ω @ f < 1 kHz; ensures stable regulation under fast load transients |
| Reference current | 0.19–0.30 μA @ IK = 10 mA; minimizes resistor-divider power loss and thermal drift |
| ΔVref/ΔVKA | −0.5 to −2.7 mV/V; quantifies reference stability over cathode-anode voltage variation |
| IK(min) | 55–80 μA; defines minimum cathode current needed to maintain regulation |
Pinout & Package
SOT23 (TO-236AB) surface-mount package, 3-lead, 1.3 mm × 2.9 mm footprint, 1.1 mm height, with mirrored pinning configuration (K-REF-A).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - K | Cathode | Main current sink terminal; connects to regulated output node or optocoupler anode |
| 2 - REF | Reference input | High-impedance sensing node; sets output voltage via external R1/R2 divider |
| 3 - A | Anode | Return path to ground or low-side rail; completes shunt current loop |
Key Features
| Feature | Design Value |
|---|---|
| Programmable output voltage | 1.24 V to 14 V via two external resistors; eliminates need for multiple fixed-voltage references |
| A-grade reference accuracy | 1.0 % Vref tolerance over temperature; reduces calibration overhead in automotive feedback systems |
| Low output noise & impedance | 0.1 Ω typical ZKA; maintains tight regulation during switching noise injection in SMPS applications |
| AEC-Q100 Grade 1 qualified | Qualified for automotive use up to +85 °C ambient; meets reliability requirements for engine control and body electronics |
| Mirrored pinning | K-REF-A arrangement; enables layout compatibility with legacy TL431-based designs using alternate routing |
Applications
| Automotive Isolated Feedback Loop | Precision Constant Current Sink |
|---|---|
|
Use Scenario: Secondary-side voltage sensing in flyback or forward converters with optocoupler isolation. IC Role / Device Role / Timing Role: Shunt regulator providing stable reference to optocoupler LED, enabling primary-side PWM controller adjustment. Use Value: 1.0 % Vref tolerance and −40 °C to +85 °C operation ensure ±1 % output voltage regulation across vehicle lifetime and environmental extremes. |
Use Scenario: LED driver or sensor bias circuit requiring stable current independent of supply variation. IC Role / Device Role / Timing Role: Precision current sink where cathode current equals (Vref / Rset), with REF node grounded and A tied to load return. Use Value: 0.19–0.30 μA reference current minimizes Rset power dissipation and improves thermal stability vs. Zener-based solutions. |
| On-Board Shunt Regulator | Adjustable Series Pass Reference |
|
Use Scenario: Local 3.3 V or 5 V regulation from higher intermediate bus (e.g., 12 V battery rail) in infotainment modules. IC Role / Device Role / Timing Role: Three-terminal shunt element dissipating excess power to hold output voltage constant. Use Value: 70 mA sink capability and 0.1 Ω impedance allow stable regulation under 200 mW load step changes without external compensation. |
Use Scenario: Programmable voltage reference for linear regulators or ADC reference buffers in ADAS domain controllers. IC Role / Device Role / Timing Role: Adjustable reference source feeding the non-inverting input of an op-amp controlling series pass transistor base/gate. Use Value: 1228–1252 mV Vref with 1.0 % tolerance provides tighter initial accuracy than standard 1.25 V references, reducing system-level calibration steps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431ACDBZR-Q | Normal pinning (REF-K-A), same 1.0 % Vref tolerance and −40 °C to +85 °C range | Requires PCB layout revision due to reversed REF/K placement; identical electrical behavior | Select when existing layout uses standard pinout and no redesign is feasible |
| TLVH431NQDBZR-Q | Same mirrored pinning but 1.5 % Vref tolerance and −40 °C to +125 °C rating | Better high-temp support but looser reference accuracy; suitable for under-hood sensors | Select when junction temperature exceeds +85 °C and 1.5 % tolerance is acceptable |
Compared with TLVH431NIDBZR-Q, TLVH431ACDBZR-Q offers identical accuracy but requires pinout-compatible layout, while TLVH431NQDBZR-Q trades 0.5 % Vref tolerance for extended +125 °C operation-making the former optimal for space-constrained A-grade designs and the latter for high-temperature automotive zones.
Availability
TLVH431NIDBZR-Q is available at Aetrix Electronics and suitable for automotive power supply feedback, precision current limiting, and isolated SMPS control requiring stable component supply across production lifecycles.
Supply support for TLVH431NIDBZR-Q 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 leading semiconductor manufacturer specializing in high-performance, reliable discrete and analog components for automotive, industrial, and consumer applications.
The TLVH431N-Q family targets automotive-grade precision voltage regulation, delivering AEC-Q100 qualified shunt regulators optimized for isolated feedback, current sinking, and on-board regulation in harsh environments.
FAQ
What is the pin configuration of TLVH431NIDBZR-Q?
TLVH431NIDBZR-Q uses mirrored pinning in SOT23: Pin 1 is Cathode (K), Pin 2 is Reference (REF), and Pin 3 is Anode (A). This differs from standard TL431-compatible pinouts and must be verified in layout to avoid functional failure. The marking code "8N%" identifies this variant on the device body.
How does the 1.0 % Vref tolerance impact design margin?
The 1.0 % Vref tolerance (1228–1252 mV at 25 °C) directly limits total output voltage error in resistor-programmed configurations. For a 5 V output set by R1/R2, worst-case error remains within ±1.2 % before considering resistor tolerance and temperature drift-reducing need for post-production trimming in automotive modules.
Can TLVH431NIDBZR-Q replace a standard TL431 in existing designs?
It can replace TL431 only if the PCB layout accommodates mirrored pinning (K-REF-A) and the application operates within −40 °C to +85 °C. Electrical parameters-including 0.1 Ω impedance, 70 mA sink, and 1.0 % Vref-are superior, but pin mismatch will cause immediate malfunction without board revision.
What thermal derating applies at 85 °C ambient?
At Tamb = 85 °C, maximum power dissipation drops to ~450 mW on FR4 PCB with standard footprint (per Fig. 2 curve #1), requiring cathode current ≤ 36 mA at 12.5 V VKA. For continuous 70 mA operation, use ceramic PCB (curve #3) or add copper pour to anode pad to sustain full rating up to 85 °C.
TLVH431NIDBZR-QVL 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):
- 1.24V
- Voltage - Output (Max):
- 14 V
- Current - Output:
- 70 mA
- Tolerance:
- ±1.5%
- Temperature Coefficient:
- -
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 80 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
TLVH431NIDBZR-QVL FAQ
1.How can I place an order for TLVH431NIDBZR-QVL through Aetrix?
Please submit a Request for Quotation (RFQ) for TLVH431NIDBZR-QVL 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 TLVH431NIDBZR-QVL reliable?
The price and inventory of TLVH431NIDBZR-QVL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLVH431NIDBZR-QVL is usually 5 days.
3.What payment methods are accepted for TLVH431NIDBZR-QVL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLVH431NIDBZR-QVL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLVH431NIDBZR-QVL?
TLVH431NIDBZR-QVL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLVH431NIDBZR-QVL 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 TLVH431NIDBZR-QVL?
For technical support, including TLVH431NIDBZR-QVL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLVH431NIDBZR-QVL requirements.
6.How does Aetrix verify that TLVH431NIDBZR-QVL is sourced from the original manufacturer or authorized distributors?
All TLVH431NIDBZR-QVL 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 TLVH431NIDBZR-QVL meets industry standards.
7.What is the process for return or replacement of TLVH431NIDBZR-QVL?
All TLVH431NIDBZR-QVL units undergo pre-shipment inspection (PSI). If there is an issue with TLVH431NIDBZR-QVL, 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 TLVH431NIDBZR-QVL part is unused and in its original packaging.
Return procedure for TLVH431NIDBZR-QVL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLVH431NIDBZR-QVL Tags
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