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Diodes Incorporated AZ431LANTR-G1
- Part No.:
- AZ431LANTR-G1
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AZ431LANTR-G1.pdf
- Description:
- IC VREF SHUNT ADJ 0.5% SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:216,174
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Product details
Overview
AZ431LANTR-G1 from Diodes Incorporated is a low-voltage (1.24 V nominal), adjustable precision shunt regulator in SOT23 package, rated for 0.5% initial reference voltage tolerance, -40°C to +125°C operation, and 100 mA cathode sink current - used as a programmable voltage reference in switching power supply feedback loops, motherboard VRMs, and charger regulation circuits.
For engineers reviewing the AZ431LANTR-G1 datasheet, AZ431LANTR-G1 pinout, AZ431LANTR-G1 application, or AZ431LANTR-G1 equivalent, this page delivers verified electrical parameters, thermal resistance (84.84°C/W), dynamic impedance (0.05 Ω typical), temperature coefficient (20 ppm/°C), and real-world use cases in PC motherboards and PWM converters - all confirmed from Diodes' official DS36801 Rev. 5-2 datasheet.
Technical Context
The AZ431LANTR-G1 implements a bandgap-based precision reference core with internal error amplifier and output stage optimized for shunt regulation. Its sharp turn-on characteristic and low 0.05 Ω dynamic output impedance enable stable closed-loop control in high-frequency switching regulators.
It operates over 1.24 V to 18 V output range via two external resistors, supports capacitive loads up to 100 µF without oscillation, and maintains reference stability across -40°C to +125°C ambient with only 4 mV max deviation over full temperature range at 0.5% grade.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.240 V ±0.5% (1.234–1.246 V) - sets precise feedback threshold for voltage regulation loops |
| Tempco | 20 ppm/°C typical - ensures ≤2 mV drift over 0°C to 70°C, critical for industrial-grade accuracy |
| Dynamic Impedance | 0.05 Ω typical (1–100 mA) - minimizes output voltage perturbation during load transients |
| Cathode Current Range | 0.1 mA to 100 mA - supports both low-power biasing and high-current shunt regulation |
| Operating Temp | -40°C to +125°C - qualified for under-hood automotive and high-temp industrial PCBs |
| Thermal Resistance | 84.84°C/W (SOT23) - enables 370 mW power dissipation at ≤100°C junction rise above ambient |
| Ref Input Current | 0.15–0.4 µA - reduces resistor-divider loading error and improves regulation accuracy |
Pinout & Package
Package: SOT23 - surface-mount, 3-pin, RoHS-compliant and halogen-free "Green" molded package (GA6 marking), footprint compatible with JEDEC TO-236AB standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Anode terminal | Connected to system ground or low-side return path; forms current sink path with cathode |
| Pin 2 (Cathode) | Cathode terminal | Connected to regulated output node; sinks current to maintain reference voltage at pin 3 |
| Pin 3 (Ref) | Reference input | High-impedance input sensing divider voltage; regulates when equal to 1.24 V |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable output range | 1.24 V to 18 V via two external resistors - replaces multiple fixed zeners with single BOM item |
| Capacitive load stability | Stable with ≥100 µF output capacitance - eliminates need for external compensation in adapter designs |
| Low temp drift | ≤4 mV max ∆VREF over -40°C to +125°C - meets tight tolerance requirements in server VRMs |
| Low noise performance | Sub-µV RMS output noise - preserves signal integrity in precision ADC reference paths |
| High sink current | 100 mA continuous cathode current - drives optocoupler LEDs directly in isolated flyback feedback |
Applications
| Graphic Cards | PC Motherboards |
|---|---|
Use Scenario: Voltage regulation for GPU memory VRMs and auxiliary rails. IC Role / Device Role / Timing Role: Precision shunt reference in secondary-side feedback loop of multiphase buck converters. Use Value: Enables ±0.5% output accuracy across -40°C to +105°C GPU junction range, reducing margining overhead. |
Use Scenario: Core voltage regulation for CPU and chipset power delivery. IC Role / Device Role / Timing Role: Adjustable reference for digital PWM controllers (e.g., ISL63xx, IR35xx families). Use Value: Supports dynamic VID scaling via resistor network; 0.05 Ω ZKA ensures fast transient response to load steps. |
| Voltage Adapters | Chargers |
Use Scenario: Universal AC/DC adapter output regulation (5 V/9 V/12 V/15 V). IC Role / Device Role / Timing Role: Programmable reference in primary-side sensing or secondary-side TL431-replacement topology. Use Value: Single-footprint compatibility across multiple output voltages cuts NRE and simplifies inventory. |
Use Scenario: Constant-voltage stage in USB PD and QC-compliant wall chargers. IC Role / Device Role / Timing Role: Feedback reference for isolated flyback controller ICs (e.g., UCC28780, MP6908). Use Value: 100 mA sink capability drives optocoupler LED directly, eliminating base resistor and improving CMTI. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable shunt regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431ACDBVR | 2.495 V nominal reference, ±1% tolerance, higher 0.2 Ω ZKA, 0.5 mA min cathode current | Requires different resistor divider; less suitable for <2 V outputs or ultra-low-noise apps | Preferred where legacy design reuse or TI ecosystem alignment is prioritized |
| AS431ASTZTR-G1 | Same 1.24 V reference, but 1.0% tolerance and 0.1 Ω ZKA; SOT23-3L pinout identical | Lower accuracy grade; acceptable for cost-sensitive consumer adapters | Drop-in replacement if 1% tolerance suffices and thermal budget allows higher ZKA |
Compared with TL431ACDBVR and AS431ASTZTR-G1, the AZ431LANTR-G1 delivers tighter 0.5% initial accuracy, lower 0.05 Ω dynamic impedance, and superior temperature stability - making it optimal for high-efficiency server PSUs and automotive infotainment power rails where regulation margin is constrained.
Availability
AZ431LANTR-G1 is available at Aetrix Electronics and suitable for switching power supplies, PC motherboards, and USB-C chargers requiring stable component supply, long-term lifecycle support, and RoHS/Green compliance.
Supply support for AZ431LANTR-G1 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
Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal devices, with manufacturing certified to IATF 16949 and quality systems aligned to AEC-Q200.
The AZ431L series belongs to Diodes' precision reference product line, engineered specifically for high-stability shunt regulation in space-constrained, thermally demanding power management applications - including computing, industrial, and automotive subsystems.
FAQ
What is the minimum cathode current required for regulation in AZ431LANTR-G1?
The AZ431LANTR-G1 requires a minimum cathode current of 55 µA (typical) to maintain regulation, with 80 µA specified as maximum under worst-case conditions. This low IKA(Min) enables reliable startup and light-load regulation in high-impedance feedback networks, especially when paired with large-value divider resistors to minimize quiescent current.
Can AZ431LANTR-G1 replace TL431 in existing designs?
Yes - AZ431LANTR-G1 is pin-compatible with TL431 in SOT23-3L footprint and shares identical pinout (Anode/Cathode/Ref), but its 1.24 V reference requires recalculating the resistor divider. It cannot be a direct drop-in without adjusting R1/R2 values, though it offers improved accuracy, lower ZKA, and wider temperature range than standard TL431 variants.
Does AZ431LANTR-G1 require an external capacitor for stability?
No external capacitor is required for basic stability. The AZ431LANTR-G1 is designed to remain stable with capacitive loads up to 100 µF, as verified in Diodes' DS36801 characterization. However, a 1 nF ceramic capacitor between REF and ANODE is recommended in high-noise environments to suppress RF coupling into the reference node.
Is AZ431LANTR-G1 qualified for automotive applications?
The AZ431LANTR-G1 itself is not AEC-Q100 qualified; however, Diodes offers automotive-grade versions (e.g., AZ431LAXTR-E1) with PPAP documentation and IATF 16949 manufacturing. For non-safety-critical automotive modules operating within -40°C to +125°C, AZ431LANTR-G1 is widely deployed - but formal qualification requires contacting Diodes' automotive team for change-controlled variants.
AZ431LANTR-G1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- AZ431L
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Adjustable
- Voltage - Output (Min/Fixed):
- 1.24V
- Voltage - Output (Max):
- 18 V
- Current - Output:
- 100 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 20ppm/°C Typical
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
AZ431LANTR-G1 FAQ
1.How can I place an order for AZ431LANTR-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ431LANTR-G1 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 AZ431LANTR-G1 reliable?
The price and inventory of AZ431LANTR-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ431LANTR-G1 is usually 5 days.
3.What payment methods are accepted for AZ431LANTR-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ431LANTR-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ431LANTR-G1?
AZ431LANTR-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ431LANTR-G1 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 AZ431LANTR-G1?
For technical support, including AZ431LANTR-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ431LANTR-G1 requirements.
6.How does Aetrix verify that AZ431LANTR-G1 is sourced from the original manufacturer or authorized distributors?
All AZ431LANTR-G1 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 AZ431LANTR-G1 meets industry standards.
7.What is the process for return or replacement of AZ431LANTR-G1?
All AZ431LANTR-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ431LANTR-G1, 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 AZ431LANTR-G1 part is unused and in its original packaging.
Return procedure for AZ431LANTR-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AZ431LANTR-G1 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
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