My Inquiry
My Account
Diodes Incorporated AZ432AZTR-G1
- Part No.:
- AZ432AZTR-G1
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- -
- Datasheet:
-
AZ432AZTR-G1.pdf
- Description:
- IC VREF SHUNT ADJ TO92
- Quantity:
- Payment:
- Shipping:
Inventory:2,079
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AZ432AZTR-G1 from Diodes Incorporated is a low-voltage (1.25V) adjustable precision shunt regulator with 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, sinks 0.1–100 mA cathode current, and sets output voltage from 1.25V to 18V using two external resistors. It replaces Zener diodes in PC motherboard voltage regulation and switching power supply feedback loops.
For engineers reviewing the AZ432AZTR-G1 datasheet, AZ432AZTR-G1 pinout, AZ432AZTR-G1 application, or AZ432AZTR-G1 equivalent, this page delivers verified electrical parameters, package-specific terminal mapping, thermal performance data, real-world use cases in voltage adapters and graphic card VRMs, and validated alternative parts for continuity planning.
Technical Context
The AZ432AZTR-G1 implements a bandgap-based precision reference core with sharp turn-on characteristics and low output impedance, enabling stable closed-loop regulation even under capacitive loads up to 10 µF. Its internal architecture supports operation with cathode-to-anode voltages from VREF to 18 V and maintains <±4 mV reference deviation over -40°C to +125°C.
It functions as a 3-terminal programmable shunt: the REF pin senses the reference node, ANODE connects to system ground or return path, and CATHODE sinks current to regulate output voltage. The device requires no external compensation and achieves <0.15 Ω max dynamic impedance across 1 kHz to 1 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VREF | 1.250 V ±0.5% - precise setpoint for feedback loop calibration |
| Tempco | 20 ppm/°C typical - ensures <±4 mV drift over full -40°C to +125°C range |
| ZKA | 0.05 Ω typical - enables tight regulation under fast load transients |
| IKAMIN | 55 µA minimum - allows stable regulation at ultra-low bias currents |
| VKA Max | 18 V - supports direct use in 12 V and 15 V rail feedback networks |
| IKA Range | 0.1–100 mA - accommodates both low-power sensing and high-current shunt applications |
| θJC (SOT-23) | 84.84 °C/W - defines thermal derating for continuous 370 mW dissipation |
Pinout & Package
AZ432AZTR-G1 is supplied in SOT-23 package (3-pin, surface-mount), with lead-free and green-compliant construction per RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CATHODE) | Current sink output | Connects to regulated output node; sinks current to maintain VREF at pin 3 |
| 2 (ANODE) | Ground reference | Must be connected to system ground or return path; forms current return loop |
| 3 (REF) | Precision reference input | Senses divider network midpoint; regulates when voltage equals VREF |
Key Features
| Feature | Design Value |
|---|---|
| Programmable output range | 1.25 V to 18 V via R1/R2 resistor divider - eliminates need for multiple Zener values |
| Low tempco stability | 20 ppm/°C typical - reduces calibration drift in automotive and industrial environments |
| Capacitive load immunity | Stable with ≥10 µF output capacitance - simplifies EMI filter integration without oscillation risk |
| Ultra-low IREF | 0.15 µA typical - minimizes divider current error and power loss in high-impedance feedback networks |
| Wide operating temperature | -40°C to +125°C ambient - qualified for under-hood and server board applications |
Applications
| Graphic Card VRM | PC Motherboard |
|---|---|
Use Scenario: Precision voltage setting for GPU core and memory rails in discrete graphics cards. IC Role / Device Role / Timing Role: Shunt regulator in feedback path of multiphase buck converters, adjusting output based on REF pin voltage. Use Value: 0.5% VREF tolerance ensures ±12 mV accuracy on 2.5 V rail, meeting PCIe Gen5 GPU voltage margin requirements. |
Use Scenario: Regulation of CPU VDDIO, SOC standby, and chipset I/O rails on ATX motherboards. IC Role / Device Role / Timing Role: Adjustable reference for secondary DC-DC controllers managing 1.05 V, 1.8 V, and 3.3 V domains. Use Value: Low 0.05 Ω ZKA maintains regulation during rapid load steps from DDR5 memory bursts. |
| Voltage Adapter | Switching Power Supply |
Use Scenario: Universal AC/DC adapter output regulation across 5 V to 15 V USB-PD and legacy barrel-jack designs. IC Role / Device Role / Timing Role: Primary-side shunt reference feeding optocoupler feedback in flyback controllers. Use Value: 18 V cathode rating supports direct interface with 15 V auxiliary windings without external clamping. |
Use Scenario: Output voltage sensing in open-frame 24 V/48 V telecom and industrial SMPS units. IC Role / Device Role / Timing Role: Secondary-side reference for TL431-replacement feedback circuits in isolated forward converters. Use Value: 20 ppm/°C tempco ensures <±0.3% output variation over 85°C ambient rise, meeting IEC 62368-1 thermal compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable shunt regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431BIDBZR | 2.495 V fixed reference; 0.5% tolerance; higher 0.2 Ω ZKA; requires external divider for <2.495 V outputs | Not suitable for sub-2.5 V regulation; less flexible for 1.25–2.4 V rails like LPDDR5 I/O | Select when existing TL431 footprint and 2.5 V nominal output are acceptable |
| AZ431LZTR-E1 | Same 1.25 V reference; 1.0% tolerance; identical pinout and thermal specs; newer production status | Direct replacement where 1% tolerance is sufficient; avoids obsolete-part procurement risk | Preferred for new designs requiring long-term availability and AEC-Q200-compatible variants |
Compared with TL431BIDBZR, AZ432AZTR-G1 enables lower-voltage regulation and tighter thermal drift control; compared with AZ431LZTR-E1, it offers superior 0.5% initial accuracy but carries obsolescence risk requiring last-time-buy planning.
Availability
AZ432AZTR-G1 is available at Aetrix Electronics and suitable for PC motherboard voltage regulation, graphic card VRMs, and switching power supply feedback circuits requiring stable component supply despite its obsolete status.
Supply support for AZ432AZTR-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 centers across Asia and manufacturing in Taiwan, China, and Malaysia.
AZ432AZTR-G1 belongs to Diodes' precision reference product line, engineered specifically for high-accuracy, low-drift shunt regulation in computing, consumer, and industrial power systems where Zener diode limitations necessitate active voltage control.
FAQ
What is the maximum cathode voltage rating for AZ432AZTR-G1?
The absolute maximum cathode-to-anode voltage (VKA) is 20 V, but the recommended operating limit is 18 V. Exceeding 18 V risks accelerated parametric shift and reduced long-term reliability, especially above 125°C junction temperature. Operation at 18 V is validated for continuous use with proper thermal management in SOT-23 package.
Can AZ432AZTR-G1 replace a standard 3.3 V Zener diode?
Yes - by configuring R1 = 10.0 kΩ and R2 = 16.2 kΩ, AZ432AZTR-G1 delivers 3.30 V ±0.5% with <±0.15 mV/°C drift, outperforming typical 5% tolerance Zeners that exhibit >50 ppm/°C tempco and poor dynamic impedance. No additional compensation is required.
Is AZ432AZTR-G1 qualified for automotive applications?
No - AZ432AZTR-G1 is not AEC-Q100 qualified. Diodes offers automotive-grade alternatives like AZ431L-AE-13 (AEC-Q100 Grade 1) with identical pinout and 1.0% tolerance, but AZ432AZTR-G1 lacks PPAP documentation, IATF 16949 traceability, and extended-temperature validation beyond datasheet limits.
What is the minimum cathode current needed for regulation?
The minimum cathode current (IKAMIN) is 55 µA at 25°C, rising to 80 µA across -40°C to +125°C. Below this threshold, the device exits regulation and VOUT collapses toward VKA. Designers must ensure divider network and load leakage do not reduce IKA below 80 µA under worst-case conditions.
AZ432AZTR-G1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- -
- Series:
- -
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Tolerance:
- -
- Temperature Coefficient:
- -
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
AZ432AZTR-G1 FAQ
1.How can I place an order for AZ432AZTR-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ432AZTR-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 AZ432AZTR-G1 reliable?
The price and inventory of AZ432AZTR-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ432AZTR-G1 is usually 5 days.
3.What payment methods are accepted for AZ432AZTR-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ432AZTR-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ432AZTR-G1?
AZ432AZTR-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ432AZTR-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 AZ432AZTR-G1?
For technical support, including AZ432AZTR-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ432AZTR-G1 requirements.
6.How does Aetrix verify that AZ432AZTR-G1 is sourced from the original manufacturer or authorized distributors?
All AZ432AZTR-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 AZ432AZTR-G1 meets industry standards.
7.What is the process for return or replacement of AZ432AZTR-G1?
All AZ432AZTR-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ432AZTR-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 AZ432AZTR-G1 part is unused and in its original packaging.
Return procedure for AZ432AZTR-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AZ432AZTR-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
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…
