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Nexperia USA Inc. TLVH431NAIDBZR-QR
- Part No.:
- TLVH431NAIDBZR-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TLVH431NAIDBZR-QR.pdf
- Description:
- IC VREF SHUNT 1.24V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,184
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Product details
Overview
TLVH431NAIDBZR-Q from Nexperia is an A-grade adjustable precision shunt regulator in SOT23 package, featuring 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 current sink in automotive feedback loops and precision power regulation circuits.
For engineers reviewing the TLVH431NAIDBZR-Q datasheet, TLVH431NAIDBZR-Q pinout, TLVH431NAIDBZR-Q application, or TLVH431NAIDBZR-Q equivalent, this device supports stable shunt regulation up to 14 V with two external resistors, delivers low-noise performance in isolated SMPS feedback paths, and meets AEC-Q100 Grade 1 qualification for automotive use.
Technical Context
The TLVH431NAIDBZR-Q implements a three-terminal shunt topology with internal bandgap reference and active error amplifier driving a bipolar output stage. Its reference voltage is set externally via resistor divider between cathode and reference pins, enabling precise output voltage tuning from 1.24 V to 14 V.
It operates with sink current from 80 μA to 70 mA, exhibits ≤1.3 mV reference voltage drift over −40 °C to +85 °C, and maintains <0.30 μA reference current across temperature - critical for high-accuracy current limiting and feedback stability in automotive power systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1228–1252 mV (A-grade, 1.0 % tolerance at 10 mA, 25 °C) - ensures tight output regulation in closed-loop feedback designs |
| Temperature Range | −40 °C to +85 °C - qualified for under-hood automotive environments and industrial control systems |
| Cathode Current Range | 0.08 mA to 70 mA - supports both low-power biasing and high-current shunt regulation without external amplification |
| Dynamic Impedance | 0.10–0.15 Ω (f < 1 kHz) - provides stable voltage reference under transient load conditions in SMPS feedback networks |
| Reference Current | 0.19–0.30 μA (max at 25 °C) - enables high-impedance resistor dividers, reducing power loss in battery-sensitive applications |
| AEC-Q100 Grade | Grade 1 (−40 °C to +125 °C junction) - confirms reliability for automotive powertrain and body electronics |
| Package | SOT23 (TO-236AB) - surface-mount compatible with standard reflow profiles and space-constrained PCB layouts |
Pinout & Package
SOT23 plastic surface-mounted package (TO-236AB), 3-lead, normal pinning configuration per Table 3 and Figure 29.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (REF) | Reference input | High-impedance node connected to resistor divider midpoint; sets regulated output voltage via external R1/R2 ratio |
| 2 (K) | Cathode | Current-sink output terminal; connects to regulated rail or SMPS optocoupler anode; handles up to 70 mA |
| 3 (A) | Anode | Return path to ground or low-side reference; completes shunt current loop and defines cathode-anode voltage drop |
Key Features
| Feature | Design Value |
|---|---|
| Programmable output voltage | 1.24 V to 14 V using two external resistors - eliminates need for multiple fixed-voltage references in multi-rail systems |
| A-grade reference tolerance | 1.0 % (vs. 1.5 % standard grade) - reduces output error budget in precision feedback paths for EV DC-DC converters |
| Low dynamic impedance | 0.1 Ω typical - minimizes output voltage perturbation during fast load transients in isolated flyback controllers |
| Automotive qualification | AEC-Q100 Grade 1 compliant - validated for continuous operation in automotive ambient and junction temperature extremes |
| Low reference current | ≤0.30 μA - allows use of >1 MΩ resistor dividers, cutting standby power in always-on vehicle modules |
Applications
| Automotive SMPS Feedback | Precision Current Sink |
|---|---|
Use Scenario: Isolated flyback converter in ADAS camera ECU requiring stable 5 V output under varying input and load conditions. IC Role / Device Role / Timing Role: Shunt regulator in optocoupler feedback path, setting reference voltage for secondary-side error amplifier. Use Value: 1.0 % reference tolerance and low 0.1 Ω impedance ensure ±1.5 % output regulation across temperature and line/load variations. |
Use Scenario: LED driver for interior lighting with dimming control and thermal derating. IC Role / Device Role / Timing Role: Precision constant-current sink regulating LED string current independent of forward voltage drift. Use Value: Sink current accuracy maintained within ±2 % over −40 °C to +85 °C due to low reference drift (≤1.3 mV) and stable ZKA. |
| Programmable Shunt Regulator | Overvoltage Protection Reference |
Use Scenario: Backup power supply for telematics module where main 12 V rail may sag during cranking. IC Role / Device Role / Timing Role: Adjustable shunt regulator clamping auxiliary 3.3 V rail to prevent brownout during engine start. Use Value: External resistor programming enables exact 3.3 V threshold with 1.0 % initial accuracy and minimal temperature coefficient. |
Use Scenario: Battery management system monitoring 48 V mild-hybrid bus voltage with overvoltage lockout. IC Role / Device Role / Timing Role: Precision reference for comparator-based OVLO circuit detecting >52 V fault condition. Use Value: Low 0.01–0.05 μA off-state current prevents false triggering; sharp turn-on characteristic ensures clean trip point. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable shunt regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431NIDBZR-Q | 1.5 % reference tolerance (1222–1258 mV), same −40 °C to +85 °C range and SOT23 package | Acceptable where ±1.5 % output regulation suffices; lower cost for non-critical subsystems | Select when tighter reference accuracy is not required and BOM cost optimization is prioritized |
| TLVH431NAQDBZR-Q | Same 1.0 % tolerance but rated for −40 °C to +125 °C ambient; identical electrical specs | Suitable for under-hood applications exceeding +85 °C ambient (e.g., engine control units) | Choose for extended temperature operation where junction temperature exceeds 125 °C |
Compared with TLVH431NAIDBZR-Q, TLVH431NIDBZR-Q trades 0.5 % reference accuracy for cost reduction in commercial-temperature applications, while TLVH431NAQDBZR-Q extends ambient rating to +125 °C without sacrificing A-grade tolerance - enabling direct substitution only where thermal envelope permits.
Availability
TLVH431NAIDBZR-Q is available at Aetrix Electronics and suitable for automotive power conversion, precision current regulation, and isolated feedback loop design requiring stable component supply across production lifecycles.
Supply support for TLVH431NAIDBZR-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 headquartered in Nijmegen, Netherlands, specializing in high-volume logic, analog, and discrete components with strong automotive and industrial focus.
The TLVH431N-Q family was designed specifically for automotive-grade precision voltage regulation, emphasizing AEC-Q100 compliance, low drift, and robustness in harsh electrical environments.
FAQ
What is the minimum cathode current required for regulation?
The TLVH431NAIDBZR-Q requires a minimum cathode current (IK(min)) of 55 μA to maintain regulation, verified across −40 °C to +85 °C. This value ensures reliable turn-on even at cold temperatures and low-power bias conditions, making it suitable for ultra-low-quiescent-current applications like always-on vehicle modules.
Can TLVH431NAIDBZR-Q replace a Zener diode in existing designs?
Yes - it replaces Zener diodes in shunt regulation and voltage reference roles with superior performance: sharper turn-on, lower dynamic impedance (0.1 Ω vs. typical Zener's 5–20 Ω), and programmable output (1.24–14 V). No circuit redesign is needed beyond adding two external resistors for voltage setting.
How does the mirrored pinning variant differ from TLVH431NAIDBZR-Q?
TLVH431NAIDBZR-Q uses normal SOT23 pinning (Pin 1 = REF, Pin 2 = K, Pin 3 = A). Mirrored variants (e.g., TLVH431NAMQDBZR-Q) swap REF and K pins (Pin 1 = K, Pin 2 = REF). PCB layout must match the specific pinning; mixing them causes functional failure.
Is external capacitor compensation required for stability?
Stability depends on load capacitance and ESR. Figure 20 shows stable operation with CL ≥ 1 nF at 25 °C, but higher capacitance (≥10 nF) is recommended for automotive temperature ranges. Always verify stability across full operating current and temperature using the test circuits in Figures 21–22.
TLVH431NAIDBZR-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%
- 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)
TLVH431NAIDBZR-QR FAQ
1.How can I place an order for TLVH431NAIDBZR-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLVH431NAIDBZR-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 TLVH431NAIDBZR-QR reliable?
The price and inventory of TLVH431NAIDBZR-QR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLVH431NAIDBZR-QR is usually 5 days.
3.What payment methods are accepted for TLVH431NAIDBZR-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLVH431NAIDBZR-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLVH431NAIDBZR-QR?
TLVH431NAIDBZR-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLVH431NAIDBZR-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 TLVH431NAIDBZR-QR?
For technical support, including TLVH431NAIDBZR-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLVH431NAIDBZR-QR requirements.
6.How does Aetrix verify that TLVH431NAIDBZR-QR is sourced from the original manufacturer or authorized distributors?
All TLVH431NAIDBZR-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 TLVH431NAIDBZR-QR meets industry standards.
7.What is the process for return or replacement of TLVH431NAIDBZR-QR?
All TLVH431NAIDBZR-QR units undergo pre-shipment inspection (PSI). If there is an issue with TLVH431NAIDBZR-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 TLVH431NAIDBZR-QR part is unused and in its original packaging.
Return procedure for TLVH431NAIDBZR-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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