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Nexperia USA Inc. TLVH431NQDBZRR
- Part No.:
- TLVH431NQDBZRR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TLVH431NQDBZRR.pdf
- Description:
- IC VREF SHUNT ADJ 1.5% TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,562
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Product details
Overview
TLVH431NQDBZRR 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 0.1 Ω typical dynamic cathode-anode impedance - used in isolated SMPS feedback loops, precision current sinks, and on-board voltage regulation.
For engineers reviewing the TLVH431NQDBZRR datasheet, TLVH431NQDBZRR pinout, TLVH431NQDBZRR application, or TLVH431NQDBZRR equivalent, this page delivers verified electrical parameters, SOT23 normal-pinning configuration, thermal derating curves, stability boundaries with load capacitance, and A-grade vs standard-grade performance distinctions.
Technical Context
The TLVH431NQDBZRR implements a bandgap-based reference core with active output circuitry delivering sharp turn-on characteristics and low output noise. Its functional diagram shows REF, K (cathode), and A (anode) terminals forming a 3-terminal shunt topology where cathode current (0.08–70 mA) regulates voltage via external resistor divider.
It operates across –40 °C to +125 °C ambient temperature, with reference voltage variation of ±5 mV over that range and ΔVref/ΔVKA of –0.8 to –2.7 mV/V. Dynamic cathode-anode impedance remains ≤0.15 Ω below 1 kHz, enabling stable operation with load capacitances as low as 10 nF under worst-case conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference voltage (Vref) | 1222–1258 mV at 10 mA, 25 °C - sets minimum programmable output (1.24 V) and defines accuracy baseline for external resistor network. |
| Cathode current range (IK) | 0.08 mA to 70 mA - determines usable load current range and power dissipation headroom (up to 950 mW on ceramic PCB). |
| Dynamic cathode-anode impedance (ZKA) | 0.10–0.15 Ω below 1 kHz - ensures minimal output voltage perturbation during transient load changes in feedback or current-sink applications. |
| Reference current (Iref) | 0.19–0.30 μA - contributes <10 μV error in high-impedance resistor dividers; critical for precision setting above 10 V output. |
| Temperature coefficient (ΔVref) | ±5 mV over –40 °C to +125 °C - enables stable regulation in automotive under-hood and industrial control environments without external compensation. |
| Output voltage range | 1.24 V to 14 V - achieved via R1/R2 ratio; supports both low-voltage logic rails and higher intermediate bus voltages in multi-rail systems. |
| ESD rating (HBM) | 4 kV - provides robustness against handling and board-level electrostatic discharge during assembly and field operation. |
Pinout & Package
SOT23 plastic surface-mounted package (3 leads), 1.9 mm × 1.1 mm × 1.0 mm body, standard footprint per Figure 29 and reflow soldering land pattern per Figure 30.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (REF) | Reference input | High-impedance node sensing voltage divider midpoint; draws only 0.3 μA max - enables high-R bias networks without significant error. |
| 2 (K) | Cathode | Current-sink output terminal; carries full regulated load current (up to 70 mA); connects to supply rail in shunt regulator configuration. |
| 3 (A) | Anode | Return path to ground or low-side reference; must be low-impedance to maintain regulation accuracy and thermal stability. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable output voltage up to 14 V | Enables single-part support for diverse rail voltages (e.g., 3.3 V, 5 V, 12 V) using only two external resistors - reduces BOM count in multi-output power supplies. |
| 1.5 % reference voltage tolerance (standard grade) | Guarantees initial output accuracy within ±18 mV at 12 V setting - sufficient for non-critical analog monitoring and general-purpose regulation. |
| 0.1 Ω typical output impedance | Minimizes load-regulation error (<1 mV at 10 mA step) - critical for maintaining tight voltage control in precision current-limiting circuits. |
| Sink current capability: 0.08–70 mA | Supports direct use in constant-current sink designs (e.g., LED biasing, sensor excitation) without additional pass transistors or op-amps. |
| Stable with ≥10 nF load capacitance | Validated stability boundary allows compact ceramic capacitor placement near device - simplifies layout in space-constrained DC/DC feedback paths. |
Applications
| Isolated SMPS 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 precise reference to optocoupler LED anode, enabling accurate primary-side duty-cycle adjustment. Use Value: Maintains ±1.5 % output regulation across line/load/temperature with no secondary-side LDO - reduces component count and improves efficiency. |
Use Scenario: Biasing high-accuracy current sources for pressure sensors or RTDs in industrial transmitters. IC Role / Device Role / Timing Role: Adjustable shunt element defining sink current magnitude via R1/R2 network; cathode connected to sensor return. Use Value: Delivers 0.01 % current stability over –40 °C to +125 °C due to low ΔVref/ΔT and sub-μA Iref - eliminates need for trimming. |
| On-Board Voltage Regulation | Adjustable Power Supply Reference |
|
Use Scenario: Local 3.3 V or 5 V regulation for microcontroller I/O banks or analog peripherals in embedded systems. IC Role / Device Role / Timing Role: Three-terminal shunt regulator replacing Zener diodes; REF tied to resistor divider, K to unregulated rail, A to ground. Use Value: Achieves sharper knee and lower dynamic impedance than 5.1 V Zener - improves transient response and reduces output ripple by >30 %. |
Use Scenario: Programmable reference input for adjustable linear regulators (e.g., LM317) or DAC-controlled power supplies. IC Role / Device Role / Timing Role: Precision voltage source setting feedback node voltage; replaces fixed 2.5 V references to extend output range. Use Value: Enables 1.24–14 V output span with <0.1 % drift over temperature - supports flexible lab bench supply and test equipment design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431NAQDBZR | A-grade (1.0 % Vref tolerance) with same –40 °C to +125 °C temp range and SOT23 normal pinning. | Required where initial output accuracy better than ±15 mV at 12 V is mandatory (e.g., metrology-grade supplies). | Select when tighter initial tolerance justifies cost premium; identical pinout and layout compatibility. |
| TLVH431NQDBZT | Tape-and-reel variant of same electrical specs; identical Vref, IK, ZKA, and thermal ratings. | Used exclusively in automated SMT production; no functional difference in circuit behavior. | Choose for volume manufacturing; same schematic symbol and PCB footprint as TLVH431NQDBZRR. |
Compared with TLVH431NQDBZRR, TLVH431NAQDBZR improves initial accuracy by 0.5 % but shares identical thermal stability and dynamic impedance; TLVH431NQDBZT offers identical performance in tape-and-reel packaging for pick-and-place compatibility - neither alters circuit design or layout.
Availability
TLVH431NQDBZRR is available at Aetrix Electronics and suitable for isolated SMPS feedback loops, precision current sinks, and on-board voltage regulation requiring stable component supply across industrial temperature ranges and high-volume production cycles.
Supply support for TLVH431NQDBZRR 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 power MOSFET solutions, with strong emphasis on automotive and industrial applications.
The TLVH431N family belongs to Nexperia's precision analog portfolio, designed specifically for cost-sensitive yet accuracy-demanding shunt regulation tasks in power management subsystems - balancing performance, thermal robustness, and manufacturability.
FAQ
What is the minimum cathode current required for regulation?
The TLVH431NQDBZRR requires a minimum cathode current (IK(min)) of 55 μA to maintain regulation, verified at VKA = Vref across –40 °C to +125 °C. Below this threshold, the device exits active regulation and behaves as an open circuit between cathode and anode.
Can TLVH431NQDBZRR replace a Zener diode directly?
Yes - it replaces Zener diodes in shunt regulator configurations with superior performance: sharper turn-on, lower dynamic impedance (0.1 Ω vs typical 10–50 Ω for Zeners), and programmable voltage (1.24–14 V) without changing components. Pin-compatible replacement requires matching SOT23 normal pinning (REF-K-A).
How does load capacitance affect stability?
Stability is guaranteed for load capacitances ≥10 nF when placed close to the device, per Figure 20 test conditions. Capacitance below this value risks oscillation, especially at high temperatures or low cathode currents; ESR also impacts phase margin and must be considered in final layout.
What is the maximum power dissipation at 85 °C ambient?
At Tamb = 85 °C, maximum power dissipation is 580 mW when mounted on FR4 PCB with 1 cm² anode pad (Rth(j-a) = 216 K/W), calculated as (150 °C − 85 °C) / 216 K/W. Derating follows linear curve in Figure 2 - exceeding this causes junction temperature to exceed 150 °C absolute maximum.
TLVH431NQDBZRR 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
TLVH431NQDBZRR FAQ
1.How can I place an order for TLVH431NQDBZRR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLVH431NQDBZRR 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 TLVH431NQDBZRR reliable?
The price and inventory of TLVH431NQDBZRR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLVH431NQDBZRR is usually 5 days.
3.What payment methods are accepted for TLVH431NQDBZRR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLVH431NQDBZRR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLVH431NQDBZRR?
TLVH431NQDBZRR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLVH431NQDBZRR 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 TLVH431NQDBZRR?
For technical support, including TLVH431NQDBZRR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLVH431NQDBZRR requirements.
6.How does Aetrix verify that TLVH431NQDBZRR is sourced from the original manufacturer or authorized distributors?
All TLVH431NQDBZRR 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 TLVH431NQDBZRR meets industry standards.
7.What is the process for return or replacement of TLVH431NQDBZRR?
All TLVH431NQDBZRR units undergo pre-shipment inspection (PSI). If there is an issue with TLVH431NQDBZRR, 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 TLVH431NQDBZRR part is unused and in its original packaging.
Return procedure for TLVH431NQDBZRR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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