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Nexperia USA Inc. TLVH431NQDBZRVL
- Part No.:
- TLVH431NQDBZRVL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TLVH431NQDBZRVL.pdf
- Description:
- IC VREF SHUNT ADJ 1.5% TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:19,860
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Product details
Overview
TLVH431NQDBZR from Nexperia is a three-terminal adjustable precision shunt regulator with 1.5 % reference voltage tolerance, 1.24 V to 14 V programmable output range set by two external resistors, and SOT23 package for space-constrained power management in isolated SMPS feedback loops.
For engineers reviewing the TLVH431NQDBZR datasheet, TLVH431NQDBZR pinout, TLVH431NQDBZR application, or TLVH431NQDBZR equivalent, key selection criteria include cathode current range (0.08–70 mA), dynamic impedance (0.10 Ω typ), thermal stability across –40 °C to +125 °C, and mirrored vs. normal pinning configuration.
Technical Context
The TLVH431NQDBZR implements a bandgap-based reference core with active output circuitry delivering sharp turn-on characteristics and low output noise-enabling direct replacement of Zener diodes in precision regulation. Its functional diagram shows REF, K (cathode), and A (anode) terminals forming a voltage-controlled current sink.
It operates as a two-node shunt element where cathode-anode voltage (VKA) is regulated via external resistor divider feedback to REF; minimum cathode current is 55 μA, and off-state current remains below 0.05 μA at 14 V, supporting high-impedance bias networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference voltage (Vref) | 1222–1258 mV at 10 mA, 25 °C - sets base accuracy for all programmed output voltages |
| Cathode current range (IK) | 0.08 mA to 70 mA - defines usable load regulation window and external series resistor sizing |
| Dynamic cathode-anode impedance (ZKA) | 0.10–0.15 Ω below 1 kHz - ensures stable regulation under transient load steps |
| Reference current (Iref) | 0.19–0.30 μA - enables high-value resistor dividers without significant error contribution |
| Temperature range (Tamb) | –40 °C to +125 °C - supports industrial and extended-temperature embedded power rails |
| Output voltage range | 1.24 V to 14 V - programmable via R1/R2 divider without internal scaling limitations |
| Thermal resistance (Rth(j-a)) | 360 K/W on FR4 PCB - informs derating requirements for continuous 70 mA operation |
Pinout & Package
SOT23 plastic surface-mounted package (3 leads), 1.9 mm × 1.1 mm footprint, 0.95 mm height; normal pinning configuration (REF–K–A).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | REF | Reference input node; connected to resistor divider midpoint to set regulated VKA |
| 2 | K | Cathode terminal; sinks current from V+ rail through external load or series pass device |
| 3 | A | Anode terminal; tied to system ground or return path, completing shunt current loop |
Key Features
| Feature | Design Value |
|---|---|
| Programmable output voltage | Up to 14 V using only two external resistors - eliminates need for multiple fixed-voltage regulators |
| Low dynamic impedance | 0.10 Ω typical - maintains tight regulation during fast load transients in SMPS feedback paths |
| Sharp turn-on characteristic | Active output stage enables clean threshold crossing - reduces overshoot in precision current limiting |
| Low reference current | 0.19–0.30 μA - permits >1 MΩ resistor values, minimizing power loss in high-impedance feedback networks |
| Wide operating temperature range | –40 °C to +125 °C - validated performance across automotive under-hood and industrial control environments |
Applications
| Shunt Regulator | Precision Current Limiter |
|---|---|
|
Use Scenario: Local 5 V or 3.3 V rail regulation from unregulated DC input in microcontroller subsystems. IC Role / Device Role / Timing Role: Shunt regulator providing stable voltage reference and sinking excess current to maintain constant output. Use Value: Replaces discrete Zener + transistor combinations with single-component solution and ±1.5 % initial accuracy. |
Use Scenario: Limiting inrush current during hot-swap insertion of peripheral modules. IC Role / Device Role / Timing Role: Precision current limiter setting maximum safe current via REF-to-ground resistor. Use Value: Delivers repeatable 100 mA limit with <±10 mV reference drift over –40 °C to +125 °C. |
| Precision Constant Current Sink | Isolated Feedback Loop for SMPS |
|
Use Scenario: Driving LED strings with consistent brightness across supply voltage variation. IC Role / Device Role / Timing Role: Constant current sink controlling LED current via cathode-connected load. Use Value: Maintains 20 mA ±0.5 % over 12 V input range using 0.1 Ω sense resistor and 1.24 V reference. |
Use Scenario: Secondary-side voltage sensing in flyback converters with optocoupler-coupled feedback. IC Role / Device Role / Timing Role: Isolated feedback regulator generating error signal referenced to secondary ground. Use Value: Enables <1 % output voltage regulation at 5 V/12 V outputs with <2.7 mV/V line regulation sensitivity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431NAQDBZR | 1.0 % Vref tolerance (vs. 1.5 %); same pinout, package, and temperature range | Better initial accuracy required for <0.5 % output regulation in precision analog supplies | Select when tighter reference tolerance justifies cost premium and thermal drift is managed separately |
| TLVH431NMQDBZR | Mirrored pinning (K–REF–A vs. REF–K–A); identical electrical specs and 1.5 % tolerance | PCB layout compatibility with legacy designs using mirrored SOT23 footprints | Choose only when board-level pin compatibility overrides standard pinout preference |
Compared with TLVH431NQDBZR, TLVH431NAQDBZR improves reference accuracy by 0.5 % but offers no thermal or noise advantage, while TLVH431NMQDBZR preserves full electrical equivalence at the cost of nonstandard pin assignment-making the original optimal for new designs prioritizing layout consistency and cost efficiency.
Availability
TLVH431NQDBZR is available at Aetrix Electronics and suitable for isolated SMPS feedback, precision current sinking, and shunt regulation applications requiring stable component supply across industrial temperature ranges.
Supply support for TLVH431NQDBZR 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 high-volume, high-reliability logic, discrete, and MOSFET solutions with strong emphasis on automotive and industrial applications.
The TLVH431N family targets precision analog power management, specifically replacing Zener diodes in shunt regulation, current limiting, and isolated feedback circuits where accuracy, low noise, and wide temperature operation are critical.
FAQ
What is the pin configuration of TLVH431NQDBZR?
TLVH431NQDBZR uses standard SOT23 normal pinning: Pin 1 = REF, Pin 2 = K (cathode), Pin 3 = A (anode). This differs from mirrored variants like TLVH431NMQDBZR (K–REF–A), and incorrect PCB layout will prevent proper regulation.
Can TLVH431NQDBZR regulate output voltages above 12 V?
Yes-TLVH431NQDBZR supports output voltages up to 14 V when configured with appropriate external resistors. The cathode-anode voltage (VKA) rating is 14 V absolute maximum, and regulation remains stable across the full 1.24 V–14 V range with IK between 0.08 mA and 70 mA.
How does reference current affect accuracy in high-impedance dividers?
TLVH431NQDBZR's reference current is 0.19–0.30 μA, contributing negligible error even with 1 MΩ dividers (e.g., 0.3 μA × 1 MΩ = 0.3 V drop). However, at >10 MΩ, Iref-induced offset exceeds 1 % of 1.24 V, so divider impedances should stay ≤5 MΩ for maintained accuracy.
Is TLVH431NQDBZR qualified for automotive use?
No-TLVH431NQDBZR is not automotive-qualified. Per Nexperia's revision history (Rev. 3, Oct 2024), this part is explicitly designated non-automotive; automotive alternatives carry "-Q" suffixes and undergo separate AEC-Q100 qualification testing.
TLVH431NQDBZRVL 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 ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
TLVH431NQDBZRVL FAQ
1.How can I place an order for TLVH431NQDBZRVL through Aetrix?
Please submit a Request for Quotation (RFQ) for TLVH431NQDBZRVL 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 TLVH431NQDBZRVL reliable?
The price and inventory of TLVH431NQDBZRVL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLVH431NQDBZRVL is usually 5 days.
3.What payment methods are accepted for TLVH431NQDBZRVL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLVH431NQDBZRVL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLVH431NQDBZRVL?
TLVH431NQDBZRVL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLVH431NQDBZRVL 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 TLVH431NQDBZRVL?
For technical support, including TLVH431NQDBZRVL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLVH431NQDBZRVL requirements.
6.How does Aetrix verify that TLVH431NQDBZRVL is sourced from the original manufacturer or authorized distributors?
All TLVH431NQDBZRVL 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 TLVH431NQDBZRVL meets industry standards.
7.What is the process for return or replacement of TLVH431NQDBZRVL?
All TLVH431NQDBZRVL units undergo pre-shipment inspection (PSI). If there is an issue with TLVH431NQDBZRVL, 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 TLVH431NQDBZRVL part is unused and in its original packaging.
Return procedure for TLVH431NQDBZRVL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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