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Nexperia USA Inc. TLVH431NACDBZR-QVL
- Part No.:
- TLVH431NACDBZR-QVL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TLVH431NACDBZR-QVL.pdf
- Description:
- IC VREF SHUNT 1.24V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,200
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Product details
Overview
TLVH431NACDBZR-Q from Nexperia is an A-grade adjustable precision shunt regulator in SOT23 package, delivering 1.24 V reference voltage with ±1.0 % tolerance at 10 mA cathode current and 25 °C, supporting output programming from 1.24 V to 14 V via two external resistors, and qualified per AEC-Q100 Grade 1 for automotive feedback loops.
For engineers reviewing the TLVH431NACDBZR-Q datasheet, TLVH431NACDBZR-Q pinout, TLVH431NACDBZR-Q application, or TLVH431NACDBZR-Q equivalent, this device serves as a low-noise, low-impedance (0.1 Ω typical) shunt reference for isolated SMPS feedback, precision current sinking, and on-board voltage regulation where thermal stability across −40 °C to +70 °C is required.
Technical Context
The TLVH431NACDBZR-Q implements a three-terminal shunt topology with internal bandgap reference and error amplifier driving a high-gain NPN output stage. Its sharp turn-on characteristic and 0.1 Ω dynamic impedance enable stable regulation under fast load transients.
It operates with reference current as low as 0.19 μA (typ), supports cathode currents from 80 μA to 70 mA, and maintains reference voltage variation ≤ ±0.3 mV over 0 °C to 70 °C ambient - meeting A-grade accuracy requirements for automotive power management subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference voltage (Vref) | 1240 mV ±12.4 mV at IK = 10 mA, Tamb = 25 °C - sets absolute accuracy baseline for programmable output |
| Cathode-anode voltage (VKA) | 1.24 V to 14 V - defines maximum programmable output range using external resistor divider |
| Cathode current (IK) | 0.08 mA to 70 mA - determines minimum bias and maximum sink capability for feedback or current-limit circuits |
| Dynamic impedance (ZKA) | 0.10 Ω typical at f < 1 kHz - ensures minimal output voltage deviation during transient load changes |
| Reference current (Iref) | 0.19–0.30 μA typical - enables ultra-low-power biasing of resistor network without degrading accuracy |
| Temperature range | −40 °C to +70 °C - validated operating envelope for A-grade automotive cabin electronics |
| ESD rating (HBM) | 4 kV - provides robustness against handling and board-level electrostatic discharge events |
Pinout & Package
SOT23 (TO-236AB) plastic surface-mounted package, 3-lead, standard pinning configuration (REF–K–A).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (REF) | Reference input | High-impedance node sensing voltage divider midpoint; draws only 0.19–0.30 μA |
| 2 (K) | Cathode | Current-sink output terminal; carries full regulated load current up to 70 mA |
| 3 (A) | Anode | Return path to system ground or negative rail; forms cathode-anode voltage drop (VKA) |
Key Features
| Feature | Design Value |
|---|---|
| A-grade reference tolerance | ±1.0 % at 25 °C - enables tighter output voltage control than standard 1.5 % grade in safety-critical feedback paths |
| Low dynamic impedance | 0.10 Ω typical - minimizes output voltage ripple under dynamic load conditions in SMPS feedback |
| Ultra-low reference current | 0.19 μA typical - reduces resistor-divider power loss and improves accuracy in high-impedance networks |
| AEC-Q100 Grade 1 qualification | −40 °C to +125 °C junction temperature - certifies suitability for under-hood automotive applications |
| Sharp turn-on characteristic | Fast regulation onset below Vref - eliminates dead zone and improves transient response vs. Zener diodes |
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 reference providing stable 2.5 V feedback threshold to optocoupler LED driver. Use Value: Enables ±1 % output regulation over line/load/temperature with <0.1 Ω impedance minimizing opto-LED current variation. |
Use Scenario: Constant-current biasing of laser diodes or LEDs in automotive lighting modules. IC Role / Device Role / Timing Role: Adjustable current sink setting precise 100 mA drive independent of supply fluctuations. Use Value: Maintains current accuracy within ±1.5 % across −40 °C to +70 °C ambient using only two resistors. |
| On-Board Voltage Regulation | Precision Current Limiter |
Use Scenario: Local 3.3 V regulation for microcontroller I/O banks in automotive body control modules. IC Role / Device Role / Timing Role: Shunt regulator clamping voltage with series resistor, replacing discrete Zener + transistor. Use Value: Achieves 10 mV max Vref drift over 0 °C to 70 °C, reducing need for calibration in production test. |
Use Scenario: Overcurrent protection for 12 V CAN bus transceivers in vehicle networking nodes. IC Role / Device Role / Timing Role: Adjustable current limiter triggering shutdown when bus current exceeds 250 mA. Use Value: Provides repeatable trip point with <1 % tolerance and <100 ns response to fault events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable shunt regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431ACDBZR | Non-automotive grade; 1.0 % tolerance but only rated for 0 °C to 70 °C commercial temp range | Lacks AEC-Q100 qualification; unsuitable for automotive deployment | Select only for cost-sensitive industrial or consumer designs without automotive reliability requirements |
| TLVH431AQDBZR-Q | Same AEC-Q100 Grade 1 qualification but mirrored pinning (K–REF–A); 1.0 % tolerance; −40 °C to +125 °C extended temp range | Requires PCB layout revision due to reversed REF/K pins; supports higher ambient operation | Choose when design requires operation beyond +70 °C ambient or when mirrored pinout better fits routing constraints |
Compared with TLVH431NACDBZR-Q, TLVH431ACDBZR lacks automotive qualification and thermal range, while TLVH431AQDBZR-Q offers wider temperature support but mandates pinout redesign - making the NACDBZR-Q optimal for A-grade performance within standard automotive cabin environments without layout change.
Availability
TLVH431NACDBZR-Q is available at Aetrix Electronics and suitable for automotive power management, isolated DC-DC feedback, and precision current control requiring stable component supply with AEC-Q100 compliance and traceable sourcing.
Supply support for TLVH431NACDBZR-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 global semiconductor expert focused on essential efficiency technologies, delivering high-performance logic, analog, and discrete components optimized for automotive, industrial, and mobile applications.
TLVH431N-Q belongs to Nexperia's precision shunt regulator product line, engineered specifically for automotive-grade feedback, current regulation, and voltage reference functions demanding AEC-Q100 qualification and tight parametric stability.
FAQ
What is the minimum cathode current required for regulation?
The TLVH431NACDBZR-Q requires a minimum cathode current (IK(min)) of 55 μA to maintain regulation, verified at VKA = Vref. This ultra-low startup current enables reliable operation in high-impedance feedback networks where bias current must be minimized to avoid loading errors.
Can this device replace a Zener diode directly?
Yes - the TLVH431NACDBZR-Q can directly replace Zener diodes in shunt regulation applications due to its sharp turn-on characteristic, lower dynamic impedance (0.1 Ω vs. typical Zener >10 Ω), and programmable output. No additional active components are needed, though external resistor values must be recalculated for desired voltage setpoint.
How does the A-grade tolerance affect system-level accuracy?
The ±1.0 % reference voltage tolerance at 25 °C translates to ±12.4 mV absolute error, which propagates linearly into the final output voltage set by R1/R2. For a 5 V output, this yields ±50 mV total error before resistor tolerance and temperature drift - enabling tighter overall regulation than standard-grade alternatives in closed-loop systems.
Is load capacitance critical for stability?
Yes - stability depends on load capacitance and ESR, especially near the 10–100 nF range. Figure 20 shows stable operation with CL ≥ 10 nF at 25 °C, but verification across full temperature and current ranges is mandatory. Use low-ESR ceramic capacitors placed adjacent to the device to ensure phase margin >45°.
TLVH431NACDBZR-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%
- Temperature Coefficient:
- -
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 80 µA
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
TLVH431NACDBZR-QVL FAQ
1.How can I place an order for TLVH431NACDBZR-QVL through Aetrix?
Please submit a Request for Quotation (RFQ) for TLVH431NACDBZR-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 TLVH431NACDBZR-QVL reliable?
The price and inventory of TLVH431NACDBZR-QVL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLVH431NACDBZR-QVL is usually 5 days.
3.What payment methods are accepted for TLVH431NACDBZR-QVL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLVH431NACDBZR-QVL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLVH431NACDBZR-QVL?
TLVH431NACDBZR-QVL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLVH431NACDBZR-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 TLVH431NACDBZR-QVL?
For technical support, including TLVH431NACDBZR-QVL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLVH431NACDBZR-QVL requirements.
6.How does Aetrix verify that TLVH431NACDBZR-QVL is sourced from the original manufacturer or authorized distributors?
All TLVH431NACDBZR-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 TLVH431NACDBZR-QVL meets industry standards.
7.What is the process for return or replacement of TLVH431NACDBZR-QVL?
All TLVH431NACDBZR-QVL units undergo pre-shipment inspection (PSI). If there is an issue with TLVH431NACDBZR-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 TLVH431NACDBZR-QVL part is unused and in its original packaging.
Return procedure for TLVH431NACDBZR-QVL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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