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Nexperia USA Inc. TLVH431NCDBZR-QR
- Part No.:
- TLVH431NCDBZR-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TLVH431NCDBZR-QR.pdf
- Description:
- IC VREF SHUNT 1.24V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,905
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Product details
Overview
TLVH431NCDBZR-Q from Nexperia is a three-terminal adjustable precision shunt regulator with 1.24 V reference voltage, 1.5 % initial tolerance, and 0.1 Ω typical dynamic cathode-anode impedance, operating across 0 °C to 70 °C ambient range in SOT23 package - used for isolated feedback in automotive-grade SMPS designs.
For engineers reviewing the TLVH431NCDBZR-Q datasheet, TLVH431NCDBZR-Q pinout, TLVH431NCDBZR-Q application, or TLVH431NCDBZR-Q equivalent, this device serves as a low-noise, AEC-Q100 grade-1 qualified replacement for Zener diodes in precision voltage regulation, current limiting, and optocoupler-coupled feedback loops where thermal stability and sink-current accuracy are critical.
Technical Context
The TLVH431NCDBZR-Q implements a bandgap-referenced error amplifier driving an NPN output stage, enabling sharp turn-on and stable operation with external resistor networks setting output voltage from 1.24 V to 14 V. Its 0.19–0.30 μA reference current minimizes loading on divider networks.
Designed for automotive applications, it meets AEC-Q100 Grade 1 (−40 °C to +125 °C junction) qualification and supports sink currents from 80 μA to 70 mA with <10 mV reference voltage drift over its 0 °C to 70 °C ambient operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference voltage (Vref) | 1240 mV typical; sets minimum regulation threshold and defines resistor-divider ratio for output programming |
| Reference tolerance | ±1.5 % at 25 °C; determines absolute output voltage accuracy before temperature and load effects |
| Cathode current range | 0.08 mA to 70 mA; defines usable load-sinking capability without dropout or thermal shutdown |
| Dynamic impedance (ZKA) | 0.10 Ω typical; ensures minimal output voltage variation under fast transient load changes |
| Operating temperature | 0 °C to 70 °C ambient; validated performance envelope for commercial and entry-level automotive subsystems |
| Thermal resistance (Rth(j-a)) | 360 K/W on FR4 PCB; informs derating requirements for continuous power dissipation up to 350 mW |
| 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, normal pinning configuration per Table 3 and Figure 29.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | REF | Reference input node; connects to resistor divider midpoint and controls regulation setpoint |
| 2 | K | Cathode terminal; sinks regulated current to ground or return path; primary power interface |
| 3 | A | Anode terminal; connects to system ground or low-impedance return; completes shunt current path |
Key Features
| Feature | Design Value |
|---|---|
| Programmable output voltage | 1.24 V to 14 V via two external resistors - enables flexible rail generation without dedicated regulators |
| Low output noise & impedance | 0.1 Ω typical ZKA and low inherent noise - preserves signal integrity in feedback paths of high-frequency SMPS |
| AEC-Q100 Grade 1 qualification | Qualified for automotive use (−40 °C to +125 °C junction) - supports under-hood and infotainment power systems |
| Sharp turn-on characteristic | Fast, well-defined regulation knee - eliminates ambiguity in threshold detection and improves loop stability |
| Low reference current | 0.19–0.30 μA typical - reduces resistor-divider power loss and thermal drift in precision applications |
Applications
| Automotive SMPS Feedback | Precision Current Sink |
|---|---|
Use Scenario: Isolated DC-DC converter in ADAS camera module requiring stable 3.3 V output with optocoupler-based secondary-side regulation. IC Role / Device Role / Timing Role: Shunt regulator providing precise reference to optocoupler LED drive circuit, closing voltage feedback loop across isolation barrier. Use Value: 1.5 % Vref tolerance and 0.1 Ω impedance maintain ±1.2 % output regulation despite input transients and temperature shifts. |
Use Scenario: LED biasing circuit in automotive interior lighting with strict current matching across multiple channels. IC Role / Device Role / Timing Role: Constant-current sink controlling LED string current via REF-to-ground resistor network. Use Value: 80 μA minimum cathode current and <10 mV Vref drift ensure stable 20 mA sink accuracy over 0–70 °C ambient. |
| On-Board Voltage Clamp | Adjustable Linear Regulator |
Use Scenario: Overvoltage protection for 5 V microcontroller supply rail in body control module exposed to load-dump transients. IC Role / Device Role / Timing Role: Precision shunt clamp activated above 5.1 V using resistor divider, diverting excess current away from sensitive logic. Use Value: 4 kV HBM ESD rating and 14 V max cathode-anode voltage enable reliable clamping without degradation during field operation. |
Use Scenario: Programmable 2.5–12 V auxiliary supply for sensor signal conditioning in engine control unit. IC Role / Device Role / Timing Role: Adjustable shunt regulator configured with series pass transistor to deliver low-noise, variable output. Use Value: 0.19–0.30 μA reference current allows high-value divider resistors, minimizing quiescent power in always-on subsystems. |
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 | 1.0 % reference tolerance; identical pinout and SOT23 package | Higher accuracy required in battery management reference circuits | Select when tighter initial Vref accuracy justifies cost premium and thermal drift remains within spec |
| TL431CDBZR | Non-automotive grade; 2.0 % Vref tolerance; wider −40 °C to +125 °C ambient range | Industrial power supplies where AEC-Q100 is not mandated | Choose for cost-sensitive non-automotive designs accepting higher tolerance and no automotive qualification |
Compared with TLVH431ACDBZR-Q, the TLVH431NCDBZR-Q trades 0.5 % Vref accuracy for lower cost and sufficient stability in commercial-temperature automotive subsystems; versus TL431CDBZR, it adds AEC-Q100 Grade 1 validation and tighter 1.5 % tolerance but restricts ambient operation to 0–70 °C.
Availability
TLVH431NCDBZR-Q is available at Aetrix Electronics and suitable for automotive SMPS feedback, precision current sinking, and on-board voltage clamping requiring stable component supply across production volumes and extended lifecycle planning.
Supply support for TLVH431NCDBZR-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 delivering high-performance, reliable discrete, logic, and MOSFET devices with focus on efficiency, miniaturization, and automotive-grade reliability.
The TLVH431N-Q family targets automotive power management applications, specifically engineered to replace Zener diodes in isolated feedback, precision current control, and voltage regulation circuits demanding AEC-Q100 compliance.
FAQ
What is the maximum cathode-anode voltage for TLVH431NCDBZR-Q?
The absolute maximum cathode-anode voltage (VKA) is 14 V, as specified in Table 6 (Limiting Values). Operation beyond this voltage risks permanent device damage. Recommended operating conditions constrain VKA to Vref ≤ VKA ≤ 14 V, with Vref nominally 1.24 V - meaning the device regulates up to 14 V output when configured as a shunt.
Does TLVH431NCDBZR-Q require an external capacitor for stability?
Yes - stability depends on load capacitance and ESR, especially in high-current or wide-temperature applications. Figure 20 shows stable operation requires CL ≥ 1 nF at 25 °C with 150 Ω source impedance; larger values (e.g., 10–100 nF) are recommended for automotive environments. Always verify stability across full operating current and temperature ranges per Figures 20–22.
How does the 1.5 % reference tolerance affect output voltage accuracy?
The 1.5 % Vref tolerance directly propagates into output voltage error when using resistor dividers: for VOUT = Vref × (1 + R1/R2), a ±1.5 % Vref contributes ±1.5 % to total error before considering resistor tolerances and temperature coefficients. At 5 V output, this equals ±75 mV; combining with 1 % resistors yields ~±2.5 % total error at room temperature.
Can TLVH431NCDBZR-Q be used in place of TL431 in existing designs?
Yes - TLVH431NCDBZR-Q shares identical SOT23 pinout (REF-K-A), compatible cathode current range, and similar functional behavior. However, it features lower reference current (0.19–0.30 μA vs. ~2–4 μA for TL431), requiring recalculation of divider resistors to avoid excessive loading, and offers AEC-Q100 qualification absent in standard TL431 variants.
TLVH431NCDBZR-QR 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
TLVH431NCDBZR-QR FAQ
1.How can I place an order for TLVH431NCDBZR-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLVH431NCDBZR-QR 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 TLVH431NCDBZR-QR reliable?
The price and inventory of TLVH431NCDBZR-QR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLVH431NCDBZR-QR is usually 5 days.
3.What payment methods are accepted for TLVH431NCDBZR-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLVH431NCDBZR-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLVH431NCDBZR-QR?
TLVH431NCDBZR-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLVH431NCDBZR-QR 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 TLVH431NCDBZR-QR?
For technical support, including TLVH431NCDBZR-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLVH431NCDBZR-QR requirements.
6.How does Aetrix verify that TLVH431NCDBZR-QR is sourced from the original manufacturer or authorized distributors?
All TLVH431NCDBZR-QR 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 TLVH431NCDBZR-QR meets industry standards.
7.What is the process for return or replacement of TLVH431NCDBZR-QR?
All TLVH431NCDBZR-QR units undergo pre-shipment inspection (PSI). If there is an issue with TLVH431NCDBZR-QR, 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 TLVH431NCDBZR-QR part is unused and in its original packaging.
Return procedure for TLVH431NCDBZR-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLVH431NCDBZR-QR Tags
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TL431AIDBZR
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AN431AN-ATRG1
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LM4040CYM3-2.5-TR
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AZ431LBNTR-G1
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LM4040D20IDBZR
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LM4041DIM3-ADJ/NOPB
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LM4040DIM3X-2.5/NOPB
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AZ431LANTR-G1
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