My Inquiry
My Account
Nexperia USA Inc. TLVH431NAMQDBZRVL
- Part No.:
- TLVH431NAMQDBZRVL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TLVH431NAMQDBZRVL.pdf
- Description:
- IC VREF SHUNT ADJ 1.5% TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,634
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TLVH431NAMQDBZR from Nexperia is an A-grade adjustable precision shunt regulator in SOT23 package with mirrored pinning (K-REF-A), 1.0% reference voltage tolerance at 1240 mV, 0.1 Ω dynamic cathode-anode impedance, and -40 °C to +125 °C operating range. It functions as a programmable voltage reference or current sink in feedback loops of isolated DC-DC converters, precision current limiters, and on-board regulation circuits.
For engineers reviewing the TLVH431NAMQDBZR datasheet, TLVH431NAMQDBZR pinout, TLVH431NAMQDBZR application, or TLVH431NAMQDBZR equivalent, this page delivers verified electrical parameters, mirrored-pin SOT23 layout, thermal derating curves, stability boundary data for capacitive loads, and real-world use cases in SMPS feedback and constant-current sinks.
Technical Context
The TLVH431NAMQDBZR implements a three-terminal shunt topology with internal bandgap reference and active error amplifier driving a NPN output stage. Its reference voltage is set externally via two resistors between cathode, anode, and REF pins, enabling output programming from 1.24 V to 14 V.
It features sharp turn-on characteristics and low output impedance (0.1 Ω typical), making it suitable for high-stability feedback paths. The mirrored pinning (Pin 1 = K, Pin 2 = REF, Pin 3 = A) distinguishes it from normal-pinning variants and requires PCB layout verification to avoid functional failure.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference voltage (Vref) | 1240 mV ±10 mV (A-grade, 1.0% tolerance at 25 °C; enables precise voltage setting across temperature) |
| Cathode current range (IK) | 0.08 mA to 70 mA (supports wide-range current sinking without external amplification) |
| Dynamic cathode-anode impedance (ZKA) | 0.10 Ω typical (ensures stable regulation under fast load transients up to 1 kHz) |
| Reference current (Iref) | 0.19–0.30 μA (ultra-low bias current minimizes resistor-divider loading error) |
| Operating temperature | -40 °C to +125 °C (qualified for industrial and extended-temperature embedded power systems) |
| Max cathode-anode voltage (VKA) | 14 V (sets absolute upper bound for programmable output voltage configuration) |
| Off-state current (Ioff) | ≤0.05 μA at VKA = 14 V (enables low-power shutdown modes in battery-backed systems) |
Pinout & Package
SOT23 plastic surface-mounted package (3 leads), 1.9 mm × 1.1 mm footprint, 0.95 mm height, standard JEDEC MO-178AC outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | K (cathode) | Main current sink path; connects to regulated output node or SMPS transformer secondary side |
| 2 | REF (reference) | High-impedance input sensing node; sets output voltage via external R1/R2 divider |
| 3 | A (anode) | Return path to ground or system common; forms current loop with cathode and reference |
Key Features
| Feature | Design Value |
|---|---|
| Programmable output voltage | 1.24 V to 14 V using only two external resistors - eliminates need for multiple fixed-voltage references |
| A-grade reference tolerance | ±1.0% at 25 °C with ≤2.2 mV drift over -40 °C to +125 °C - supports tight-loop regulation in harsh environments |
| Low output noise & impedance | 0.1 Ω typical ZKA and <10 µV RMS noise - maintains signal integrity in sensitive analog feedback paths |
| Mirrored pinning configuration | Pin 1 = K, Pin 2 = REF, Pin 3 = A - prevents misrouting in automated assembly when mixed with normal-pinning variants |
| Stability with capacitive loads | Stable with ≥10 nF CL at IK = 10 mA (per Fig. 20) - simplifies compensation in isolated flyback designs |
Applications
| Isolated SMPS Feedback | Precision Current Limiter |
|---|---|
|
Use Scenario: Secondary-side voltage sensing in flyback or forward converters with optocoupler-based isolation. IC Role / Device Role / Timing Role: Shunt regulator providing stable reference to optocoupler LED, enabling closed-loop regulation across isolation barrier. Use Value: Enables ±1% output voltage accuracy despite transformer winding ratio variation and optocoupler CTR drift. |
Use Scenario: Overcurrent protection in 5 V/12 V DC rails feeding microcontrollers or sensors. IC Role / Device Role / Timing Role: Adjustable shunt element that diverts excess current away from protected load when threshold is exceeded. Use Value: Programmable trip point (e.g., 2.5 A via 10 mΩ sense + R1/R2) with <100 µs response to fault conditions. |
| Precision Constant-Current Sink | On-Board Voltage Reference |
|
Use Scenario: Biasing high-precision op-amps or ADC references requiring stable current source. IC Role / Device Role / Timing Role: Two-resistor-configured current sink delivering fixed current independent of supply rail fluctuations. Use Value: Delivers 100 µA ±1.5% over -40 °C to +125 °C using 12.4 kΩ and 100 kΩ resistors (R1/R2). |
Use Scenario: Local 3.3 V or 5 V regulation for MCU I/O banks or sensor interfaces in space-constrained PCBs. IC Role / Device Role / Timing Role: Adjustable shunt regulator replacing Zener diodes for improved thermal stability and lower noise. Use Value: Reduces output voltage drift to ±5 mV over full temperature range versus ±50 mV for 5% Zeners. |
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 (REF-K-A), same A-grade tolerance and temp range | Requires different PCB layout; unsuitable for designs already routed for mirrored pinout | Select only if board revision allows pinout change and existing layout uses standard orientation |
| TL431ACDR | 3% reference tolerance, wider -40 °C to +125 °C range, SO-8 package | Larger footprint, higher output impedance (0.2 Ω), less stable with low-ESR ceramic caps | Acceptable for cost-sensitive non-critical applications where ±3% regulation suffices and board area permits SO-8 |
Compared with TLVH431NAQDBZR, TLVH431NAMQDBZR avoids PCB redesign in mirrored-pin layouts; compared with TL431ACDR, it delivers tighter tolerance, lower impedance, and smaller SOT23 footprint-critical for compact, high-accuracy power management.
Availability
TLVH431NAMQDBZR is available at Aetrix Electronics and suitable for isolated SMPS feedback, precision current limiting, and on-board voltage reference applications requiring stable component supply across industrial temperature ranges and long production lifecycles.
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 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 power management in cost-sensitive industrial and consumer systems, emphasizing small-footprint shunt regulation with automotive-grade thermal robustness and A-grade accuracy.
FAQ
What is the correct pinout configuration for TLVH431NAMQDBZR?
TLVH431NAMQDBZR uses mirrored pinning: Pin 1 = Cathode (K), Pin 2 = Reference (REF), Pin 3 = Anode (A). This differs from normal-pinning variants (e.g., TLVH431NAQDBZR) where Pin 1 = REF. Incorrect PCB layout will result in open-circuit or unregulated behavior.
Can TLVH431NAMQDBZR replace a Zener diode in a 5 V shunt regulator?
Yes-it replaces Zener diodes with superior performance: 1.0% reference tolerance vs. typical 5% Zener tolerance, 0.1 Ω dynamic impedance vs. >10 Ω for Zeners, and programmable output from 1.24 V to 14 V using two resistors instead of fixed-voltage parts.
What is the minimum cathode current required for regulation?
The minimum cathode current (IK(min)) is 55 µA at VKA = Vref, verified across -40 °C to +125 °C. Below this, regulation degrades; design must ensure IK ≥ 80 µA under worst-case conditions including resistor tolerance and temperature drift.
How does load capacitance affect stability in TLVH431NAMQDBZR circuits?
Stability depends on load capacitance (CL) and ESR: Figure 20 shows ≥10 nF CL ensures stability at IK = 10 mA. For higher currents or wider temperature ranges, CL ≥ 22 nF with ESR < 1 Ω is recommended. Always verify phase margin in final layout using network analyzer or SPICE simulation.
TLVH431NAMQDBZRVL 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
TLVH431NAMQDBZRVL FAQ
1.How can I place an order for TLVH431NAMQDBZRVL through Aetrix?
Please submit a Request for Quotation (RFQ) for TLVH431NAMQDBZRVL 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 TLVH431NAMQDBZRVL reliable?
The price and inventory of TLVH431NAMQDBZRVL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLVH431NAMQDBZRVL is usually 5 days.
3.What payment methods are accepted for TLVH431NAMQDBZRVL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLVH431NAMQDBZRVL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLVH431NAMQDBZRVL?
TLVH431NAMQDBZRVL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLVH431NAMQDBZRVL 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 TLVH431NAMQDBZRVL?
For technical support, including TLVH431NAMQDBZRVL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLVH431NAMQDBZRVL requirements.
6.How does Aetrix verify that TLVH431NAMQDBZRVL is sourced from the original manufacturer or authorized distributors?
All TLVH431NAMQDBZRVL 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 TLVH431NAMQDBZRVL meets industry standards.
7.What is the process for return or replacement of TLVH431NAMQDBZRVL?
All TLVH431NAMQDBZRVL units undergo pre-shipment inspection (PSI). If there is an issue with TLVH431NAMQDBZRVL, 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 TLVH431NAMQDBZRVL part is unused and in its original packaging.
Return procedure for TLVH431NAMQDBZRVL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLVH431NAMQDBZRVL Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
