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Nexperia USA Inc. TLVH431NAQDBZRVL
- Part No.:
- TLVH431NAQDBZRVL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TLVH431NAQDBZRVL.pdf
- Description:
- IC VREF SHUNT ADJ 1.5% TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:19,062
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Product details
Overview
TLVH431NAQDBZR from Nexperia is an A-grade adjustable precision shunt regulator in SOT23 package, featuring 1.0 % reference voltage tolerance (1228–1252 mV at 10 mA, 25 °C), 0.1 Ω typical dynamic cathode-anode impedance, and 0.08–70 mA sink current range. It operates across –40 °C to +125 °C and serves as a programmable voltage reference or precision current sink in isolated SMPS feedback paths.
For engineers reviewing the TLVH431NAQDBZR datasheet, TLVH431NAQDBZR pinout, TLVH431NAQDBZR application, or TLVH431NAQDBZR equivalent, this device supports stable 1.24–14 V output programming via two external resistors, delivers low-noise regulation in space-constrained power management circuits, and enables high-accuracy current limiting without external op-amps.
Technical Context
The TLVH431NAQDBZR implements a three-terminal shunt topology with internal bandgap reference and active error amplifier driving a bipolar output stage. Its sharp turn-on characteristic and 0.1 Ω dynamic impedance enable Zener diode replacement in precision regulation loops.
It functions as a two-input comparator: REF pin senses divided output voltage, while cathode-anode voltage (VKA) is regulated by sinking current through the K–A path. The A-grade 1.0 % Vref tolerance and –40 °C to +125 °C operation support automotive-adjacent industrial and telecom power designs requiring long-term stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference voltage (Vref) | 1228–1252 mV at 10 mA, 25 °C - defines minimum programmable output (VOUT = Vref × (1 + R1/R2)) with ±10 mV variation over full temperature range |
| Cathode current (IK) | 0.08–70 mA - sets usable load current range for shunt regulation; IK(min) = 55 μA ensures reliable turn-on under light loads |
| Dynamic impedance (ZKA) | 0.10–0.15 Ω at f < 1 kHz - provides low AC impedance for ripple rejection and loop stability in feedback networks |
| Reference current (Iref) | 0.19–0.30 μA at 10 mA cathode current - contributes negligible error in high-R divider designs (e.g., R1 = 10 kΩ adds < 3 mV offset) |
| Temperature range | –40 °C to +125 °C - supports extended industrial and under-hood applications where thermal drift must remain within ±2.2 mV of nominal Vref |
| Cathode-anode voltage (VKA) | 1.24–14 V - determines maximum output voltage headroom; 14 V rating allows direct use with 12 V rail systems plus margin |
| Off-state current (Ioff) | 0.01–0.05 μA at VKA = 14 V - ensures minimal leakage when disabled, critical for battery-backed or standby circuits |
Pinout & Package
SOT23-3 plastic surface-mounted package (3.0 × 1.4 × 1.1 mm); normal pinning configuration (REF–K–A).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (REF) | Reference input | High-impedance node sensing voltage divider output; draws only 0.19–0.30 μA, enabling high-value resistor selection |
| 2 (K) | Cathode | Current-sink output terminal; connects to regulated rail or SMPS optocoupler anode; handles up to 70 mA continuous |
| 3 (A) | Anode | Return path to ground or low-side reference; forms regulated shunt path with cathode; requires low-inductance PCB layout |
Key Features
| Feature | Design Value |
|---|---|
| A-grade 1.0 % Vref tolerance | Reduces initial output error in programmable supplies-e.g., 5.0 V setpoint has ±50 mV max deviation vs. ±75 mV for standard grade |
| 0.1 Ω typical dynamic impedance | Enables >60 dB ripple suppression at 100 kHz without external compensation, simplifying isolated flyback feedback design |
| –40 °C to +125 °C operation | Validates performance across full industrial ambient range; Vref drift limited to ±2.2 mV over temperature for A-grade variants |
| Low 0.19–0.30 μA reference current | Permits use of 100 kΩ–1 MΩ resistor dividers, minimizing power loss and thermal drift in high-precision references |
| Sharp turn-on characteristic | Eliminates Zener knee uncertainty; achieves stable regulation within 100 ns of threshold crossing, improving transient response |
Applications
| Isolated SMPS Feedback | Precision Current Sink |
|---|---|
|
Use Scenario: Secondary-side voltage sensing in flyback converters using optocoupler-coupled feedback. IC Role / Device Role / Timing Role: Shunt regulator providing precise 2.5 V reference to optocoupler LED anode, closing primary-side PWM loop. Use Value: 1.0 % Vref tolerance and 0.1 Ω impedance maintain <±1 % output regulation across line/load/temperature, reducing need for post-regulation LDOs. |
Use Scenario: Constant-current biasing of laser diodes or LED strings in industrial lighting drivers. IC Role / Device Role / Timing Role: Adjustable current sink where cathode current (IK) is set by REF-to-ground resistor (R = Vref/IOUT). Use Value: 0.19–0.30 μA Iref introduces <0.3 % error at 100 mA output; thermal drift <±2.2 mV ensures <±0.2 % current variation from –40 °C to +125 °C. |
| Programmable Shunt Regulator | Precision Voltage Reference |
|
Use Scenario: On-board 3.3 V or 5 V regulation for microcontrollers where input rail exceeds LDO dropout. IC Role / Device Role / Timing Role: Three-terminal shunt element dissipating excess current to hold output at programmed voltage. Use Value: 70 mA sink capability supports up to 230 mW dissipation (at 3.3 V); SOT23 footprint enables placement adjacent to load for minimal trace inductance. |
Use Scenario: High-stability reference for 12-bit ADCs or DACs in data acquisition modules. IC Role / Device Role / Timing Role: Buffered reference source with external op-amp follower, delivering low-noise 2.048 V or 4.096 V outputs. Use Value: Low 0.1 Ω ZKA and 0.01–0.05 μA Ioff prevent loading-induced drift; 1.0 % initial accuracy eliminates factory calibration for mid-tier instrumentation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable shunt regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431ACDBZR | Same A-grade 1.0 % Vref, but rated for 0 °C to +70 °C only | Limited to commercial-temperature applications; unsuitable for under-hood or industrial enclosures | Select when ambient stays below 70 °C and cost sensitivity outweighs extended temp qualification |
| TLVH431AIDBZR | Same A-grade 1.0 % Vref and –40 °C to +85 °C rating; identical SOT23 package | Lower max operating temperature than TLVH431NAQDBZR (+85 °C vs. +125 °C) | Choose for cost-optimized industrial designs where junction temperature remains ≤85 °C with derated power |
Compared with TLVH431NAQDBZR, TLVH431ACDBZR sacrifices temperature range for lower cost in benign environments, while TLVH431AIDBZR offers identical accuracy at reduced thermal capability-making TLVH431NAQDBZR optimal for high-reliability, wide-temperature applications demanding full A-grade precision.
Availability
TLVH431NAQDBZR is available at Aetrix Electronics and suitable for isolated SMPS feedback, precision current sinks, programmable shunt regulators, and high-stability voltage references requiring stable component supply across extended temperature ranges.
Supply support for TLVH431NAQDBZR 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, with manufacturing rooted in process efficiency and automotive-grade quality systems.
The TLVH431N family targets precision analog power management-designed specifically for shunt regulation, current limiting, and isolated feedback in industrial, telecom, and consumer power supplies where Zener replacement and tight Vref tolerance are critical.
FAQ
What is the minimum cathode current required for regulation?
The TLVH431NAQDBZR requires a minimum cathode current (IK(min)) of 55 μA to maintain regulation at Vref. This value is specified at VKA = Vref and ensures stable turn-on even under ultra-light load conditions, such as in high-impedance feedback networks where total current may fall below 100 μA.
Can TLVH431NAQDBZR replace a Zener diode directly?
Yes-TLVH431NAQDBZR replaces Zener diodes in shunt regulation roles with superior performance: it offers 1.0 % Vref tolerance versus typical ±5 % Zener tolerance, 0.1 Ω dynamic impedance versus 10–100 Ω Zener impedance, and sharp turn-on eliminating knee uncertainty. No additional components are needed beyond the two external resistors.
How does the mirrored pinning variant differ from TLVH431NAQDBZR?
TLVH431NAQDBZR uses normal pinning (REF–K–A), whereas mirrored variants like TLVH431NAMQDBZR swap REF and K pins (K–REF–A). Using a mirrored part in a normal-pinning layout causes immediate functional failure-REF connected to cathode forces uncontrolled conduction. Pinout must match PCB footprint exactly.
What is the impact of reference current (Iref) on output accuracy?
Iref (0.19–0.30 μA) flows into the REF pin and develops voltage drop across the upper resistor (R1) in the divider network. For R1 = 10 kΩ, this adds 1.9–3.0 mV error to the setpoint-<0.12 % at 2.5 V output. Accuracy impact scales linearly with R1 value, so high-precision designs use R1 ≤ 10 kΩ to keep Iref-induced error below 0.1 %.
TLVH431NAQDBZRVL 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
TLVH431NAQDBZRVL FAQ
1.How can I place an order for TLVH431NAQDBZRVL through Aetrix?
Please submit a Request for Quotation (RFQ) for TLVH431NAQDBZRVL 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 TLVH431NAQDBZRVL reliable?
The price and inventory of TLVH431NAQDBZRVL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLVH431NAQDBZRVL is usually 5 days.
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Once your TLVH431NAQDBZRVL 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 TLVH431NAQDBZRVL?
For technical support, including TLVH431NAQDBZRVL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLVH431NAQDBZRVL requirements.
6.How does Aetrix verify that TLVH431NAQDBZRVL is sourced from the original manufacturer or authorized distributors?
All TLVH431NAQDBZRVL 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 TLVH431NAQDBZRVL meets industry standards.
7.What is the process for return or replacement of TLVH431NAQDBZRVL?
All TLVH431NAQDBZRVL units undergo pre-shipment inspection (PSI). If there is an issue with TLVH431NAQDBZRVL, 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 TLVH431NAQDBZRVL part is unused and in its original packaging.
Return procedure for TLVH431NAQDBZRVL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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