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Nexperia USA Inc. TLVH431NACDBZRVL
- Part No.:
- TLVH431NACDBZRVL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TLVH431NACDBZRVL.pdf
- Description:
- IC VREF SHUNT ADJ 1.5% TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,500
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Product details
Overview
TLVH431NACDBZR from Nexperia is an A-grade adjustable precision shunt regulator in SOT23 package, delivering 1.24 V reference voltage with ±1.0 % tolerance at 10 mA cathode current and 25 °C, supporting output programming from 1.24 V to 14 V via two external resistors, and featuring 0.1 Ω dynamic cathode-anode impedance for stable regulation in isolated SMPS feedback loops.
For engineers reviewing the TLVH431NACDBZR datasheet, TLVH431NACDBZR pinout, TLVH431NACDBZR application, or TLVH431NACDBZR equivalent, this device is selected for precision shunt regulation where tight reference accuracy, low output impedance, and wide temperature operation (0 °C to 70 °C) are required in space-constrained DC-DC converter designs.
Technical Context
The TLVH431NACDBZR implements a three-terminal shunt topology with internal bandgap reference and error amplifier driving a NPN pass transistor, enabling precise voltage regulation by sinking cathode current proportional to the difference between REF pin voltage and internal 1.24 V reference. Its mirrored pinning is not applicable-this part uses normal SOT23 pinning (REF–K–A).
It operates within 0.08 mA to 70 mA cathode current range, maintains reference voltage stability over 0 °C to 70 °C ambient, and achieves ≤10 mV reference drift across temperature with ≤0.5 mV/V cathode-anode voltage sensitivity-critical for high-accuracy feedback in regulated power supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference voltage (Vref) | 1.240 V ±1.0 % at 10 mA, IK = 10 mA, Tamb = 25 °C - sets minimum programmable output voltage threshold |
| Cathode-anode voltage (VK A) | 1.24 V to 14 V - defines maximum programmable output range when used with external resistor divider |
| Cathode current (IK) | 0.08 mA to 70 mA - determines minimum load current needed for regulation and maximum sink capability |
| Dynamic impedance (ZK A) | 0.10 Ω typical, f < 1 kHz - ensures minimal output voltage variation under dynamic load transients |
| Reference current (Iref) | 0.19 µA to 0.30 µA - establishes bias current draw from REF node, critical for high-resistance divider design |
| Temperature range | 0 °C to 70 °C - specifies commercial-grade operating envelope for reliable performance in non-automotive applications |
| Output noise | Low - enables clean feedback signaling without added filtering in sensitive analog control paths |
Pinout & Package
SOT23-3 plastic surface-mounted package (3.0 mm × 1.4 mm × 1.1 mm), standard footprint per Figure 29 and reflow soldering land pattern in Figure 30.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - REF | Reference input | High-impedance node sensing divided output voltage; connects to top of R1–R2 divider; draws only 0.19–0.30 µA |
| 2 - K | Cathode | Current-sink output terminal; connects to regulated output node or SMPS optocoupler anode; handles up to 70 mA |
| 3 - A | Anode | Return path to ground or low-side rail; completes shunt current path; must be low-impedance for stable regulation |
Key Features
| Feature | Design Value |
|---|---|
| A-grade reference tolerance | ±1.0 % at 25 °C - reduces output voltage calibration burden in production test and improves system-level accuracy |
| Programmable output range | 1.24 V to 14 V - supports single-device coverage across multiple supply rails without discrete Zener selection |
| Low dynamic impedance | 0.10 Ω typical - minimizes output voltage droop during fast load steps, improving transient response in feedback loops |
| Sharp turn-on characteristic | Active error amplifier + NPN output stage - eliminates Zener knee uncertainty and enables predictable regulation onset |
| Stable operation with capacitive loads | Validated up to 80 nF with proper layout per Figure 20 - accommodates common output filter capacitance without oscillation |
Applications
| Shunt Regulator | Precision Current Limiter |
|---|---|
Use Scenario: Regulating 5 V rail from 12 V input in industrial I/O module using resistor divider and series pass transistor. IC Role / Device Role / Timing Role: Shunt regulator providing stable 5 V reference to base drive circuit of PNP pass transistor. Use Value: Replaces 5.1 V Zener diode with ±1.0 % accuracy and 0.1 Ω impedance, reducing output drift under varying load and temperature. |
Use Scenario: Limiting charging current to 200 mA in USB-powered battery management IC. IC Role / Device Role / Timing Role: Precision current limiter setting exact trip point via REF-to-ground resistor. Use Value: Achieves ±1.0 % current limit accuracy independent of supply voltage variation, eliminating need for trimming. |
| Precision Constant Current Sink | Isolated Feedback Loop for SMPS |
Use Scenario: Biasing LED string in medical display backlight with fixed 350 mA sink. IC Role / Device Role / Timing Role: Constant current sink controlling LED brightness via cathode-connected load. Use Value: Maintains 350 mA within ±1.5 % over 0–70 °C using single external resistor, avoiding thermal derating. |
Use Scenario: Secondary-side voltage sensing in 12 V/3 A flyback converter with optocoupler feedback. IC Role / Device Role / Timing Role: Isolated feedback controller comparing output voltage against 1.24 V reference and driving optocoupler LED. Use Value: Enables ±1.0 % output regulation across line/load/temperature, meeting Class II efficiency and safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable shunt regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431NCDBZR | 1.5 % reference tolerance, same pinout and package | Lower accuracy requirement; acceptable where ±1.5 % output regulation suffices | Select when cost sensitivity outweighs tight reference accuracy needs |
| TL431CDBZR | 2.5 V fixed reference, 2 % tolerance, higher 0.2 Ω impedance | Fixed 2.5 V output only; unsuitable for <2.5 V programmable designs | Choose only if 2.5 V reference is sufficient and legacy compatibility is required |
Compared with TLVH431NCDBZR, TLVH431NACDBZR offers tighter 1.0 % reference accuracy and lower temperature drift, while TL431CDBZR lacks programmability below 2.5 V and exhibits higher output impedance-making TLVH431NACDBZR optimal for sub-2.5 V precision shunt regulation.
Availability
TLVH431NACDBZR is available at Aetrix Electronics and suitable for industrial power supplies, embedded DC-DC converters, and isolated feedback circuits requiring stable component supply with guaranteed long-term sourcing.
Supply support for TLVH431NACDBZR 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, headquartered in Nijmegen, Netherlands.
The TLVH431N family targets precision analog regulation in commercial-grade power management, designed specifically to replace Zener diodes with superior accuracy, stability, and programmability in compact SOT23 form factor.
FAQ
What is the minimum cathode current required for regulation?
The TLVH431NACDBZR requires a minimum cathode current of 55 µA to maintain regulation, verified across 0 °C to 70 °C ambient. This value ensures stable reference operation even with high-value resistor dividers drawing minimal current from the REF pin.
Can TLVH431NACDBZR be used in automotive applications?
No-TLVH431NACDBZR is commercially qualified (0 °C to 70 °C) and explicitly non-automotive per Nexperia's revision history. Automotive alternatives require -Q suffix parts with AEC-Q100 qualification and extended temperature range (–40 °C to 125 °C).
How does the mirrored pinning variant differ from TLVH431NACDBZR?
TLVH431NACDBZR uses normal SOT23 pinning (REF–K–A). Mirrored variants like TLVH431NAMQDBZR swap REF and K pins (K–REF–A); incorrect PCB layout for mirrored pinning causes functional failure-always verify marking code "8R%" and pin 1 orientation before placement.
What is the maximum power dissipation at 25 °C ambient?
At Tamb ≤ 25 °C on FR4 PCB with standard footprint, maximum power dissipation is 350 mW. Derating applies above 25 °C per Figure 2: e.g., 250 mW at 75 °C ambient. Exceeding limits risks thermal shutdown or permanent damage per Absolute Maximum Ratings.
TLVH431NACDBZRVL 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:
- 0°C ~ 70°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
TLVH431NACDBZRVL FAQ
1.How can I place an order for TLVH431NACDBZRVL through Aetrix?
Please submit a Request for Quotation (RFQ) for TLVH431NACDBZRVL 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 TLVH431NACDBZRVL reliable?
The price and inventory of TLVH431NACDBZRVL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLVH431NACDBZRVL is usually 5 days.
3.What payment methods are accepted for TLVH431NACDBZRVL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLVH431NACDBZRVL transactions.
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4.How is shipping managed for TLVH431NACDBZRVL?
TLVH431NACDBZRVL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLVH431NACDBZRVL 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 TLVH431NACDBZRVL?
For technical support, including TLVH431NACDBZRVL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLVH431NACDBZRVL requirements.
6.How does Aetrix verify that TLVH431NACDBZRVL is sourced from the original manufacturer or authorized distributors?
All TLVH431NACDBZRVL 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 TLVH431NACDBZRVL meets industry standards.
7.What is the process for return or replacement of TLVH431NACDBZRVL?
All TLVH431NACDBZRVL units undergo pre-shipment inspection (PSI). If there is an issue with TLVH431NACDBZRVL, 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 TLVH431NACDBZRVL part is unused and in its original packaging.
Return procedure for TLVH431NACDBZRVL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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