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Nexperia USA Inc. TLVH431NAMQDBZRR
- Part No.:
- TLVH431NAMQDBZRR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TLVH431NAMQDBZRR.pdf
- Description:
- IC VREF SHUNT ADJ 1.5% TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,810
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Product details
Overview
TLVH431NAMQDBZR from Nexperia is an A-grade (±1.0 %) adjustable precision shunt regulator in SOT23 package with mirrored pinning (Pin 1 = Cathode, Pin 2 = REF, Pin 3 = Anode), operating from −40 °C to +125 °C, delivering reference voltage of 1.240 V (typical) and sink current up to 70 mA - used in isolated SMPS feedback loops, precision current sinks, and on-board voltage regulation.
For engineers reviewing the TLVH431NAMQDBZR datasheet, TLVH431NAMQDBZR pinout, TLVH431NAMQDBZR application, or TLVH431NAMQDBZR equivalent, this page delivers verified thermal stability data, dynamic impedance (0.10 Ω typ), cathode-anode voltage range (1.24 V to 14 V), and mirrored-pin SOT23 layout critical for PCB layout validation and functional replacement.
Technical Context
The TLVH431NAMQDBZR implements a three-terminal shunt topology with internal bandgap reference and error amplifier, enabling programmable output voltage via two external resistors. Its sharp turn-on characteristic and low 0.10 Ω dynamic cathode-anode impedance support stable regulation under fast load transients.
It operates across −40 °C to +125 °C with ±1.0 % reference voltage tolerance at 25 °C and ≤2.2 mV drift over full temperature range. The device requires no external compensation for capacitive loads up to 1 nF when properly decoupled per Figure 20 test conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.228 V to 1.252 V at 25 °C (A-grade ±1.0 % tolerance) |
| Cathode-Anode Voltage Range | 1.24 V to 14 V - sets programmable output via resistor divider |
| Sink Current Range | 0.08 mA to 70 mA - supports both light-load biasing and high-current shunting |
| Dynamic Impedance | 0.10 Ω typical - ensures minimal output voltage deviation under load variation |
| Reference Current | 0.19 µA to 0.30 µA - enables ultra-low-power resistor-divider design |
| Temp Range | −40 °C to +125 °C - qualified for extended industrial and under-hood applications |
| Output Noise | Low - specified by low ZKA and stable Vref drift (≤2.2 mV max ΔVref) |
Pinout & Package
SOT23-3 plastic surface-mounted package (3.0 × 1.4 × 1.1 mm); mirrored pinning configuration (Pin 1 = Cathode, Pin 2 = REF, Pin 3 = Anode) as defined in Table 3 and Figure 29.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Main current sink path - connects to regulated output node or SMPS optocoupler anode |
| 2 | Reference (REF) | High-impedance input sensing point - ties to resistor divider midpoint for voltage setting |
| 3 | Anode (A) | Return path to ground or low-side rail - must be low-inductance for stability |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Output Voltage | 1.24 V to 14 V using two external resistors - eliminates need for multiple fixed-voltage regulators |
| A-Grade Reference Tolerance | ±1.0 % at 25 °C - reduces calibration overhead in precision feedback paths |
| Low Dynamic Impedance | 0.10 Ω typical - maintains regulation accuracy during rapid load steps in SMPS loops |
| Ultra-Low Reference Current | 0.19 µA typical - minimizes divider power loss and improves efficiency in battery-powered systems |
| Extended Temperature Operation | −40 °C to +125 °C - supports industrial control, automotive non-safety modules, and power converters |
Applications
| Isolated SMPS Feedback | 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, closing feedback loop across isolation barrier. Use Value: Enables ±1.0 % output voltage regulation despite transformer tolerance and optocoupler CTR variation. | Use Scenario: LED driver or sensor bias circuit requiring stable current independent of supply fluctuations. IC Role / Device Role / Timing Role: Adjustable current sink where cathode current equals (Vref / Rset), referenced to stable 1.24 V bandgap. Use Value: Delivers 0.08–70 mA sink current with <2.2 mV Vref drift over −40 °C to +125 °C. |
| On-Board Shunt Regulator | Precision Current Limiter |
Use Scenario: Local 3.3 V or 5 V regulation for microcontroller I/O or analog subsystems. IC Role / Device Role / Timing Role: Three-terminal shunt element replacing Zener diodes with superior thermal stability and lower impedance. Use Value: Maintains output within ±1.0 % over temperature without external compensation components. | Use Scenario: Overcurrent protection in DC-DC converter enable paths or sensor excitation circuits. IC Role / Device Role / Timing Role: Precision shunt that triggers shutdown when sensed voltage across sense resistor exceeds Vref. Use Value: Achieves current limit threshold accuracy of ±1.0 % with negligible temperature-induced drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable shunt regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431NAQDBZR | Normal pinning (Pin 1 = REF, Pin 2 = K, Pin 3 = A); same A-grade tolerance and temp range | Requires PCB layout revision - incompatible pinout for drop-in replacement | Select when existing board uses standard SOT23 shunt regulator orientation and space allows re-routing. |
| TL431ACDBVR | TI part; ±1.0 % tolerance, but only rated to +85 °C; higher 0.2 Ω typical ZKA | Limited to commercial-temp applications; less stable under wide-temp or high-transient loads | Choose only for cost-sensitive, non-extended-temp designs where 0.2 Ω impedance is acceptable. |
Compared with TLVH431NAQDBZR, TLVH431NAMQDBZR enables direct integration into mirrored-pin layouts without redesign; versus TL431ACDBVR, it adds +125 °C operation and 0.10 Ω impedance for tighter regulation in demanding industrial power systems.
Availability
TLVH431NAMQDBZR is available at Aetrix Electronics and suitable for isolated SMPS feedback, precision current sinking, and on-board shunt regulation requiring stable component supply across extended temperature ranges.
Supply support for TLVH431NAMQDBZR 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-performance, reliable discrete and analog components for industrial, automotive, and consumer markets.
The TLVH431N family belongs to Nexperia's precision analog portfolio, designed specifically for high-accuracy voltage reference and current regulation in power management circuits where thermal stability and low impedance are critical.
FAQ
What is the pin configuration of TLVH431NAMQDBZR?
TLVH431NAMQDBZR uses mirrored pinning in SOT23: Pin 1 is Cathode (K), Pin 2 is Reference (REF), and Pin 3 is Anode (A). This differs from standard TLVH431N variants (e.g., TLVH431NAQDBZR), where Pin 1 is REF. Layout verification against Figure 29 and Table 3 is essential to avoid misconnection.
How does the A-grade tolerance affect system calibration?
The ±1.0 % reference voltage tolerance at 25 °C reduces initial calibration burden in closed-loop systems like SMPS, allowing tighter output voltage specifications without trimming. Combined with ≤2.2 mV total Vref drift over −40 °C to +125 °C, it minimizes recalibration needs across operating life.
Can TLVH431NAMQDBZR drive capacitive loads directly?
Yes - stability is maintained with load capacitances up to 1 nF when mounted close to the device and using recommended PCB layout (e.g., low-inductance anode return). Figure 20 defines stable operating boundaries; larger capacitors require series resistance or additional phase compensation per application note AN11582.
What is the minimum cathode current required for regulation?
The minimum cathode current (IK(min)) is 55 µA typical at Vref, ensuring reliable turn-on even under ultra-low-power conditions. This enables use in always-on monitoring circuits with microamp-level bias networks while maintaining regulation integrity down to 0.08 mA total sink current.
TLVH431NAMQDBZRR 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 ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
TLVH431NAMQDBZRR FAQ
1.How can I place an order for TLVH431NAMQDBZRR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLVH431NAMQDBZRR 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 TLVH431NAMQDBZRR reliable?
The price and inventory of TLVH431NAMQDBZRR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLVH431NAMQDBZRR is usually 5 days.
3.What payment methods are accepted for TLVH431NAMQDBZRR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLVH431NAMQDBZRR transactions.
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4.How is shipping managed for TLVH431NAMQDBZRR?
TLVH431NAMQDBZRR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLVH431NAMQDBZRR 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 TLVH431NAMQDBZRR?
For technical support, including TLVH431NAMQDBZRR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLVH431NAMQDBZRR requirements.
6.How does Aetrix verify that TLVH431NAMQDBZRR is sourced from the original manufacturer or authorized distributors?
All TLVH431NAMQDBZRR 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 TLVH431NAMQDBZRR meets industry standards.
7.What is the process for return or replacement of TLVH431NAMQDBZRR?
All TLVH431NAMQDBZRR units undergo pre-shipment inspection (PSI). If there is an issue with TLVH431NAMQDBZRR, 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 TLVH431NAMQDBZRR part is unused and in its original packaging.
Return procedure for TLVH431NAMQDBZRR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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