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Nexperia USA Inc. TLVH431NIDBZRVL
- Part No.:
- TLVH431NIDBZRVL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TLVH431NIDBZRVL.pdf
- Description:
- IC VREF SHUNT ADJ 1.5% TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,859
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Product details
Overview
TLVH431NIDBZR from Nexperia is an adjustable precision shunt regulator in SOT23 package, featuring 1.24 V reference voltage (±1.5 % tolerance), -40 °C to +85 °C operating temperature range, and 0.1 Ω typical dynamic cathode-anode impedance. It sinks 0.08–70 mA cathode current and sets output voltage up to 14 V via two external resistors-used in isolated SMPS feedback loops and precision current sinks.
For engineers reviewing the TLVH431NIDBZR datasheet, TLVH431NIDBZR pinout, TLVH431NIDBZR application, or TLVH431NIDBZR equivalent, this page delivers verified electrical parameters, SOT23 normal-pinning configuration, thermal derating curves, stability guidance for capacitive loads, and A-grade vs standard-grade performance distinctions.
Technical Context
The TLVH431NIDBZR implements a three-terminal shunt topology with internal bandgap reference and active error amplifier driving a high-gain NPN output stage. Its sharp turn-on characteristic and low 0.1 Ω dynamic impedance enable Zener diode replacement in precision regulation.
It operates as a programmable voltage-controlled current sink: cathode current IK varies linearly with cathode-anode voltage VKA above Vref (1.24 V), with reference current Iref ≤ 0.30 μA and off-state leakage < 0.05 μA at 14 V-analogous to a 2-terminal device but with independent REF terminal for resistor-based voltage setting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference voltage (Vref) | 1240 mV ±15 mV (1.5 % tolerance) at 10 mA, 25 °C - defines minimum regulation threshold and sets output via R1/R2 divider |
| Cathode current range (IK) | 0.08 mA to 70 mA - determines maximum shunt power dissipation and compatible load/sink capability |
| Dynamic cathode-anode impedance (ZKA) | 0.10 Ω typical (f < 1 kHz) - ensures stable regulation under fast load transients and low output noise |
| Reference current (Iref) | 0.19–0.30 μA - contributes minimal error in R1/R2 voltage divider calculation; enables high-resistor-value designs |
| Operating temperature range | -40 °C to +85 °C - validated for industrial environments; reference drift ≤ ±10 mV over full range |
| Max cathode-anode voltage (VKA) | 14 V - sets absolute upper limit for output voltage programming and isolation barrier withstand |
| Thermal resistance (Rth(j-a)) | 360 K/W on FR4 PCB - defines power derating slope: 350 mW at 25 °C, down to ~125 mW at 85 °C |
Pinout & Package
SOT23-3 plastic surface-mounted package (3.0 × 1.4 × 1.1 mm), normal pinning configuration per Table 3 and Figure 29.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (REF) | Reference input | High-impedance node connected to internal bandgap; sets regulated voltage via external R1/R2 divider |
| 2 (K) | Cathode | Current-sink output terminal; connects to positive rail in shunt regulator or SMPS optocoupler anode |
| 3 (A) | Anode | Return path for cathode current; ties to system ground or negative rail in standard configurations |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable output voltage | Programmable from 1.24 V to 14 V using only two external resistors-eliminates need for multiple fixed-voltage regulators |
| Low output impedance | 0.1 Ω typical ensures minimal output voltage deviation under varying load currents and improves transient response |
| Low reference current | ≤ 0.30 μA reduces divider resistor power loss and enables use of >1 MΩ resistors for ultra-low quiescent current designs |
| Sharp turn-on characteristic | Active output stage provides steep IV knee-enables accurate current limiting and stable operation with capacitive loads ≥ 1 nF |
| Stability boundary defined | Figures 20–22 specify stable CL vs IK operating region; avoids oscillation in SMPS feedback without added compensation |
Applications
| Isolated SMPS Feedback Loop | Precision Current Sink |
|---|---|
Use Scenario: Secondary-side voltage sensing in flyback or forward converters with optocoupler-based isolation. IC Role / Device Role / Timing Role: Shunt regulator providing precise reference to optocoupler LED anode; regulates feedback current proportional to output voltage. Use Value: Enables ±1 % output regulation across line/load/temperature; replaces discrete Zener + transistor with tighter tolerance and lower temperature drift. |
Use Scenario: Constant-current biasing of laser diodes or LED strings in industrial lighting or sensing modules. IC Role / Device Role / Timing Role: Adjustable current sink where cathode current IK = (Vref / Rset) + Iref × (1 + R1/R2), set by single resistor. Use Value: Delivers stable 1–70 mA sink with < 0.1 % current variation over temperature-no op-amp or sense resistor required. |
| Shunt Voltage Regulator | Precision Current Limiter |
Use Scenario: Low-power auxiliary rail regulation (e.g., 3.3 V or 5 V) in microcontroller subsystems with variable load. IC Role / Device Role / Timing Role: Three-terminal shunt element maintaining fixed voltage across load by sinking excess current from series pass element. Use Value: Achieves < 10 mV output variation over 0.08–70 mA load range; supports dropout-free operation with input up to 14 V. |
Use Scenario: Overcurrent protection in battery charging circuits or motor driver gate bias supplies. IC Role / Device Role / Timing Role: Fast-acting current limiter triggering when sensed voltage across sense resistor exceeds Vref. Use Value: Responds within microseconds to overcurrent events; maintains accuracy to ±1.5 % without calibration or trimming. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431ACDBZR | A-grade (1.0 % Vref tolerance) with same -40 °C to +70 °C temp range and SOT23 normal pinning | Better initial accuracy for metrology-critical biasing; identical thermal and dynamic impedance specs | Select when ±12.4 mV reference error is unacceptable, e.g., in precision DAC references or sensor excitation |
| TLVH431NQDBZR | Same 1.5 % tolerance but rated for -40 °C to +125 °C; otherwise identical electrical specs and SOT23 normal pinning | Required for under-hood automotive or high-temp industrial control where ambient exceeds 85 °C | Choose when extended temperature operation is mandatory and A-grade accuracy is not needed |
Compared with TLVH431NIDBZR, TLVH431ACDBZR trades wider temperature coverage for tighter initial accuracy, while TLVH431NQDBZR extends thermal range without improving tolerance-enabling selection based on dominant design constraint: accuracy, temperature, or cost.
Availability
TLVH431NIDBZR is available at Aetrix Electronics and suitable for isolated SMPS feedback loops, precision current sinks, shunt voltage regulators, and overcurrent protection circuits requiring stable component supply across industrial temperature ranges.
Supply support for TLVH431NIDBZR 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, headquartered in Nijmegen, Netherlands.
The TLVH431N family belongs to Nexperia's precision analog portfolio, designed specifically for cost-sensitive industrial and consumer power management applications requiring adjustable shunt regulation without complex support circuitry.
FAQ
What is the minimum cathode current required for regulation?
The TLVH431NIDBZR requires a minimum cathode current (IK(min)) of 55 μA to maintain regulation, verified across -40 °C to +85 °C. Below this, the device enters high-impedance off-state with leakage < 0.05 μA. This value is critical for designing high-resistor-divider networks where Iref + IK must exceed 55 μA.
Can TLVH431NIDBZR drive capacitive loads directly?
Yes, but stability depends on load capacitance (CL) and cathode current (IK). Figure 20 defines stable regions: for IK = 10 mA, CL must be < 1 nF or > 10 nF. Between these values, oscillation may occur. Always verify phase margin with actual PCB layout and ESR, especially in SMPS feedback paths.
How does reference current (Iref) affect output voltage accuracy?
Iref flows through the R1 resistor in the voltage divider, adding an offset error: VOUT = Vref × (1 + R1/R2) + Iref × R1. At 0.30 μA and R1 = 100 kΩ, this introduces up to 30 mV error-significant at low output voltages. Use lower R1 or account for Iref in design calculations to maintain ±1.5 % overall accuracy.
Is TLVH431NIDBZR qualified for automotive applications?
No. TLVH431NIDBZR is explicitly marked non-automotive qualified per Section 16 revision history and Legal Information. For automotive use, Nexperia offers the -Q qualified TLVH431N-Q series (e.g., TLVH431NQDBZQ), which undergoes AEC-Q101 stress testing and supports -40 °C to +125 °C operation with automotive-grade traceability.
TLVH431NIDBZRVL 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 ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
TLVH431NIDBZRVL FAQ
1.How can I place an order for TLVH431NIDBZRVL through Aetrix?
Please submit a Request for Quotation (RFQ) for TLVH431NIDBZRVL 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 TLVH431NIDBZRVL reliable?
The price and inventory of TLVH431NIDBZRVL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLVH431NIDBZRVL is usually 5 days.
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Once your TLVH431NIDBZRVL 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 TLVH431NIDBZRVL?
For technical support, including TLVH431NIDBZRVL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLVH431NIDBZRVL requirements.
6.How does Aetrix verify that TLVH431NIDBZRVL is sourced from the original manufacturer or authorized distributors?
All TLVH431NIDBZRVL 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 TLVH431NIDBZRVL meets industry standards.
7.What is the process for return or replacement of TLVH431NIDBZRVL?
All TLVH431NIDBZRVL units undergo pre-shipment inspection (PSI). If there is an issue with TLVH431NIDBZRVL, 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 TLVH431NIDBZRVL part is unused and in its original packaging.
Return procedure for TLVH431NIDBZRVL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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