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Diodes Incorporated AZ432ANTR-E1
- Part No.:
- AZ432ANTR-E1
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AZ432ANTR-E1.pdf
- Description:
- IC VREF SHUNT ADJ 0.5% SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,460
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Product details
Overview
AZ432ANTR-E1 from Diodes Incorporated is a low-voltage (1.25V) adjustable precision shunt regulator in SOT-23-3 package, delivering 0.5% initial reference voltage accuracy, 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, serving as a Zener diode replacement in PC motherboard voltage regulation and switching power supply feedback loops.
For engineers reviewing the AZ432ANTR-E1 datasheet, AZ432ANTR-E1 pinout, AZ432ANTR-E1 application, or AZ432ANTR-E1 equivalent, this page provides verified functional identity, validated SOT-23 pin mapping, confirmed thermal stability specs, and real-world use cases in precision voltage adaptation circuits.
Technical Context
The AZ432ANTR-E1 implements a bandgap-based precision reference core with sharp turn-on characteristics and low output impedance, enabling stable closed-loop regulation across capacitive loads. Its internal architecture supports programmable output voltages from 1.25V to 18V using two external resistors while maintaining ±4mV reference deviation over -40°C to +125°C.
It functions as a three-terminal shunt regulator where the REF pin senses the divided output voltage, the ANODE connects to system ground or return path, and the CATHODE sinks current to regulate voltage. The device exhibits 0.15–0.4µA reference input current and <0.1µA off-state cathode leakage at 18V cathode voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.250V ±0.5% - sets precise feedback threshold for adjustable regulators |
| Tempco | 20 ppm/°C typical - ensures ≤±4mV drift over full -40°C to +125°C range |
| Dynamic Impedance | 0.05Ω typical - maintains tight regulation under fast load transients |
| Cathode Current Range | 0.1mA to 100mA - 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 without added filtering |
| Thermal Resistance | 84.84°C/W (Junction-to-Case, SOT-23) - defines power dissipation limit at 370mW max |
Pinout & Package
AZ432ANTR-E1 is housed in a standard SOT-23-3 plastic package with gull-wing leads, 1.3mm height, and JEDEC MS-012 compliant outline. Thermal pad is not present; PCB copper area must be used for heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CATHODE) | Current sink node | Connects to regulated output node; sinks error current to maintain VREF at divider junction |
| 2 (ANODE) | Ground reference | Must be connected to system ground or return path; ties internal reference circuit to common potential |
| 3 (REF) | Feedback sense input | High-impedance input monitoring resistor divider; regulates output when voltage equals 1.25V |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Output | 1.25V–18V via two-resistor divider - eliminates need for multiple fixed-voltage references |
| Capacitive Load Stability | Stable with ≥10µF ceramic output caps - simplifies EMI filtering in compact PSU designs |
| Low Temp Drift | ≤4mV over -40°C to +125°C - enables single calibration point across full operating range |
| High Sink Current | 100mA max cathode current - supports >5W shunt regulation without external pass devices |
| Low Reference Current | 0.15–0.4µA - minimizes divider resistor power loss and improves light-load efficiency |
Applications
| Graphic Cards | PC Motherboards |
|---|---|
Use Scenario: Precision 1.2V GPU core voltage regulation with dynamic load steps. IC Role / Device Role / Timing Role: Shunt regulator providing feedback reference for multiphase buck controller. Use Value: 0.5% reference accuracy ensures ±6mV output tolerance at 1.2V, meeting PCIe Gen5 GPU voltage spec. | Use Scenario: Standby 3.3V rail regulation on ATX motherboard VRM. IC Role / Device Role / Timing Role: Adjustable shunt reference for secondary LDO or supervisor IC. Use Value: Low 0.05Ω dynamic impedance prevents output droop during 10A standby current surges. |
| Voltage Adapters | Switching Power Supplies |
Use Scenario: Universal-input AC/DC adapter with selectable 5V/9V/12V outputs. IC Role / Device Role / Timing Role: Programmable reference for optocoupler feedback loop in flyback converter. Use Value: 20 ppm/°C tempco ensures consistent output voltage across ambient temperatures without recalibration. | Use Scenario: 24V-to-5V isolated DC-DC module for industrial PLC I/O. IC Role / Device Role / Timing Role: Secondary-side shunt reference for synchronous rectifier control. Use Value: High 100mA sink current allows direct drive of optocoupler LED without buffer transistor. |
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 | 2.495V nominal reference, 1% tolerance, higher 0.2Ω dynamic impedance | Requires different resistor divider ratio; less suitable for sub-2.5V outputs | Select when legacy design uses TL431 footprint and 2.5V reference suffices |
| AZ431LARTR-G1 | Same 1.25V reference, 0.5% tolerance, but rated only to +85°C ambient | Limited to commercial-temperature applications; lower thermal robustness | Choose for cost-sensitive consumer boards where extended temperature range is unnecessary |
Compared with TL431ACDBVR and AZ431LARTR-G1, AZ432ANTR-E1 uniquely delivers 1.25V reference, full -40°C to +125°C operation, and 0.05Ω dynamic impedance-making it optimal for industrial-grade adjustable shunt regulation where low-voltage accuracy and thermal stability are critical.
Availability
AZ432ANTR-E1 is available at Aetrix Electronics and suitable for PC motherboard voltage regulation, switching power supply feedback loops, and industrial voltage adapter designs requiring stable component supply and long-term lifecycle support.
Supply support for AZ432ANTR-E1 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 ICs, with manufacturing certified to IATF 16949 and product qualification per AEC-Q100/101 standards.
The AZ432 series belongs to Diodes' precision reference product line, engineered specifically for high-stability shunt regulation in space-constrained power management systems where Zener diode limitations-such as poor tempco and high dynamic impedance-must be overcome.
FAQ
What is the minimum cathode current required for regulation in AZ432ANTR-E1?
The AZ432ANTR-E1 requires a minimum cathode current of 55µA (typical) to maintain regulation, with 80µA specified as maximum under worst-case conditions. This low startup current enables reliable operation even with high-value feedback resistors, reducing quiescent power in always-on circuits.
Can AZ432ANTR-E1 replace a standard 3.3V Zener diode directly?
No-AZ432ANTR-E1 is a 1.25V adjustable shunt regulator, not a fixed-voltage Zener. To replace a 3.3V Zener, external resistors must be added to set VOUT = 3.3V via the formula VOUT = 1.25V × (1 + R1/R2). Its superior tempco and dynamic impedance make it a functional upgrade, but not a drop-in mechanical or electrical replacement.
Is AZ432ANTR-E1 RoHS compliant and halogen-free?
Yes-AZ432ANTR-E1 carries the "E1" suffix, indicating full RoHS compliance per Directive 2011/65/EU and halogen-free status per IEC 61249-2-21. The device contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE, and bromine/chlorine content is below 900 ppm each.
Does AZ432ANTR-E1 require an output capacitor for stability?
No-AZ432ANTR-E1 is inherently stable with capacitive loads up to at least 10µF, as confirmed by Diodes' datasheet performance curves. Unlike many older shunt references, it does not oscillate or ring with ceramic or tantalum output capacitors, eliminating mandatory external compensation.
AZ432ANTR-E1 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-E1 FAQ
1.How can I place an order for AZ432ANTR-E1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ432ANTR-E1 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-E1 reliable?
The price and inventory of AZ432ANTR-E1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ432ANTR-E1 is usually 5 days.
3.What payment methods are accepted for AZ432ANTR-E1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ432ANTR-E1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ432ANTR-E1?
AZ432ANTR-E1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ432ANTR-E1 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-E1?
For technical support, including AZ432ANTR-E1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ432ANTR-E1 requirements.
6.How does Aetrix verify that AZ432ANTR-E1 is sourced from the original manufacturer or authorized distributors?
All AZ432ANTR-E1 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-E1 meets industry standards.
7.What is the process for return or replacement of AZ432ANTR-E1?
All AZ432ANTR-E1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ432ANTR-E1, 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-E1 part is unused and in its original packaging.
Return procedure for AZ432ANTR-E1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AZ432ANTR-E1 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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