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Diodes Incorporated AZ432ANTR-G1
- Part No.:
- AZ432ANTR-G1
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AZ432ANTR-G1.pdf
- Description:
- IC VREF SHUNT ADJ 0.5% SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:1,728
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Product details
Overview
AZ432ANTR-G1 from Diodes Incorporated is a low-voltage (1.25V) adjustable precision shunt regulator in SOT-23-3 package, delivering 0.5% initial reference voltage tolerance, 20 ppm/°C typical temperature coefficient, and 0.05Ω typical dynamic output impedance. It operates from -40°C to +125°C with cathode current capability up to 100mA, and serves as a Zener diode replacement in PC motherboard voltage regulation and switching power supply feedback loops.
For engineers reviewing the AZ432ANTR-G1 datasheet, AZ432ANTR-G1 pinout, AZ432ANTR-G1 application, or AZ432ANTR-G1 equivalent, this page provides verified functional identity, validated SOT-23 pin mapping, confirmed thermal stability specs, and real-world use cases in precision voltage setting circuits requiring stable 1.25–18V programmability.
Technical Context
The AZ432ANTR-G1 implements a bandgap-based precision reference core with sharp turn-on characteristics and low output impedance, enabling stable closed-loop regulation without external compensation in most applications. Its reference input current remains below 0.4 µA across temperature, minimizing resistor-divider loading error.
It functions as a three-terminal adjustable shunt regulator: cathode sinks current to ground via an external resistor network, while the reference pin senses the regulated node. The device maintains regulation down to 55 µA minimum cathode current and exhibits <15 mV total reference voltage drift over -40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.250 V ±0.5% - sets precise feedback threshold for adjustable regulators |
| Tempco | 20 ppm/°C typical - ensures <±4 mV drift over full -40°C to +125°C range |
| Dynamic Impedance | 0.05 Ω typical - maintains tight regulation under fast load transients |
| Cathode Current Range | 0.1 mA to 100 mA - supports wide output power scaling in shunt configurations |
| Operating Temp | -40°C to +125°C - qualified for industrial and extended-temperature embedded systems |
| Output Noise | Low - enables clean feedback in high-PSRR DC-DC converters |
| Min Cathode Current | 55 µA - allows regulation at ultra-low quiescent power in standby modes |
Pinout & Package
AZ432ANTR-G1 is housed in a RoHS-compliant, green-band SOT-23-3 plastic package (JEDEC TO-236AB), with 1.3 mm height and 2.9 mm × 1.3 mm footprint. Thermal resistance θJC is 84.84°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CATHODE) | Current sink terminal | Connects to regulated output node; sinks all error current to ground |
| 2 (ANODE) | Ground reference | Must be tied to system ground; substrate-connected in SOT-23 |
| 3 (REF) | Precision reference input | Senses feedback divider midpoint; draws only 0.15–0.4 µA |
Key Features
| Feature | Design Value |
|---|---|
| Programmable output range | 1.25 V to 18 V using two external resistors - eliminates need for multiple fixed references |
| Capacitive load stability | Stable with ≥10 µF output capacitance - simplifies EMI filtering without phase compensation |
| Low temp deviation | 3 mV typical over 0°C to +70°C - reduces calibration burden in consumer-grade systems |
| High sink current capacity | 100 mA max cathode current - supports >1 W dissipation in shunt mode with proper heatsinking |
| Low output impedance | 0.05 Ω typical - minimizes output voltage shift under 10 mA load step changes |
Applications
| Graphic Cards | PC Motherboards |
|---|---|
|
Use Scenario: Voltage margining and GPU core rail trimming during validation. IC Role / Device Role / Timing Role: Adjustable shunt reference in DAC-controlled feedback loop of multiphase VRMs. Use Value: Enables ±3% fine-tuning of 0.8–1.2 V GPU core voltage with <±1 mV repeatability across temperature. |
Use Scenario: Standby 3.3 V and 5 V rail regulation on ATX power delivery networks. IC Role / Device Role / Timing Role: Precision reference for secondary-side error amplifiers in isolated flyback controllers. Use Value: Maintains <±1% output accuracy over -40°C to +85°C ambient, critical for USB and PCIe interface stability. |
| Voltage Adapters | Switching Power Supplies |
|
Use Scenario: Universal-input AC/DC adapter with multiple output voltages (5 V, 9 V, 12 V). IC Role / Device Role / Timing Role: Programmable reference for optocoupler feedback in primary-side regulated topologies. Use Value: Allows single PCB design to support 3 output profiles via resistor selection, reducing BOM variants. |
Use Scenario: High-efficiency 24 V to 5 V buck converter for industrial I/O modules. IC Role / Device Role / Timing Role: Shunt regulator in TL431-replacement feedback network with improved thermal drift. Use Value: Reduces output voltage drift by 40% versus standard TL431, improving long-term calibration retention. |
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 fixed reference; 2% initial tolerance; higher 0.2 Ω dynamic impedance | Requires level-shifting circuitry for 1.25 V setpoints; less suitable for low-voltage rails | Choose when legacy design compatibility or higher reference voltage is required |
| AZ431LARTR-G1 | Same 1.25 V base, but 1.5% tolerance and 50 ppm/°C tempco; SOT-23-3 pin-compatible | Lower cost alternative where ±1.5% output accuracy is acceptable | Choose for cost-sensitive consumer applications where tighter regulation is not mandatory |
Compared with TL431ACDBVR and AZ431LARTR-G1, AZ432ANTR-G1 delivers superior 0.5% initial accuracy and 20 ppm/°C stability-critical for high-precision feedback in server PSUs and telecom power modules-while maintaining identical SOT-23-3 footprint and biasing behavior.
Availability
AZ432ANTR-G1 is available at Aetrix Electronics and suitable for PC motherboard voltage regulation, switching power supply feedback networks, and industrial voltage adapter designs requiring stable component supply and long-term lifecycle continuity.
Supply support for AZ432ANTR-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 manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.
The AZ432 series belongs to Diodes' precision reference product line, engineered specifically for high-stability, low-drift shunt regulation in power management subsystems where Zener diodes lack accuracy and thermal performance.
FAQ
What is the minimum cathode current required for regulation in AZ432ANTR-G1?
The AZ432ANTR-G1 requires a minimum cathode current of 55 µA to maintain regulation, as specified in the Electrical Characteristics table under IKA(Min). This low threshold enables stable operation in ultra-low-power standby circuits and battery-backed systems where current budget is constrained.
Can AZ432ANTR-G1 replace TL431 in existing designs?
Yes, AZ432ANTR-G1 is pin-compatible with TL431 in SOT-23-3 layout and shares identical cathode-anode-reference pinout. However, its 1.25 V reference voltage differs from TL431's 2.495 V, so resistor divider values must be recalculated to achieve the same output voltage. No other circuit changes are needed.
Is AZ432ANTR-G1 suitable for automotive applications?
AZ432ANTR-G1 is rated for -40°C to +125°C operation and meets industrial reliability standards, but it is not AEC-Q100 qualified. For automotive applications, Diodes recommends contacting their automotive team for PPAP-capable alternatives such as the AZ432Q series, which undergoes additional qualification testing.
How does the 0.5% reference voltage tolerance impact system-level accuracy?
The 0.5% initial tolerance directly limits the worst-case output voltage error in resistor-programmed configurations. For example, in a 5 V output design using R1/R2 = 3, the reference tolerance contributes ±25 mV error before considering resistor tolerances and temperature drift-making it suitable for applications requiring ≤±3% total output accuracy.
AZ432ANTR-G1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Adjustable
- Voltage - Output (Min/Fixed):
- 1.25V
- 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
AZ432ANTR-G1 FAQ
1.How can I place an order for AZ432ANTR-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ432ANTR-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 AZ432ANTR-G1 reliable?
The price and inventory of AZ432ANTR-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ432ANTR-G1 is usually 5 days.
3.What payment methods are accepted for AZ432ANTR-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ432ANTR-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ432ANTR-G1?
AZ432ANTR-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ432ANTR-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 AZ432ANTR-G1?
For technical support, including AZ432ANTR-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ432ANTR-G1 requirements.
6.How does Aetrix verify that AZ432ANTR-G1 is sourced from the original manufacturer or authorized distributors?
All AZ432ANTR-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 AZ432ANTR-G1 meets industry standards.
7.What is the process for return or replacement of AZ432ANTR-G1?
All AZ432ANTR-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ432ANTR-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 AZ432ANTR-G1 part is unused and in its original packaging.
Return procedure for AZ432ANTR-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AZ432ANTR-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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