My Inquiry
My Account
Diodes Incorporated AS431HANTR-G1
- Part No.:
- AS431HANTR-G1
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AS431HANTR-G1.pdf
- Description:
- IC VREF SHUNT ADJ 0.5% SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:6,388
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AS431HANTR-G1 from Diodes Incorporated is a three-terminal adjustable precision shunt regulator with 0.5% reference voltage tolerance, 2.495V nominal VREF, and 36V maximum cathode voltage rating. It delivers sharp turn-on characteristics, 20ppm/°C typical temperature coefficient, and 0.15Ω typical dynamic impedance-enabling stable voltage reference and error amplification in feedback loops of isolated DC-DC converters and USB PD adapters.
For engineers reviewing the AS431HANTR-G1 datasheet, AS431HANTR-G1 pinout, AS431HANTR-G1 application, or AS431HANTR-G1 equivalent, key selection criteria include its programmable output range (2.495V–36V), low 5mV max VREF drift over –40°C to +125°C, sink current capability up to 100mA, SOT23 package thermal resistance (380°C/W), and RoHS-compliant green molding compound.
Technical Context
The AS431HANTR-G1 implements a bandgap-based precision reference core with internal error amplifier and NPN pass transistor, configured as a 3-terminal shunt regulator. Its functional block diagram confirms direct REF–ANODE–CATHODE topology with no external biasing required beyond R1/R2 divider network.
It operates across –40°C to +125°C ambient, supports capacitive loads up to 100µF without oscillation (per stability boundary plots), and maintains regulation down to 0.35mA minimum cathode current-making it suitable for low-power standby regulation and precision current-source topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VREF | 2.495V nominal; sets precise regulation point via external resistor divider |
| Voltage Tolerance | ±0.5% at 25°C; ensures tight output accuracy in closed-loop power supplies |
| VKA Max | 36V; enables use in 24V industrial rails and 30V PoE++ systems |
| IKA Range | 0.5–100mA sink current; supports both light-load sensing and high-current error amplification |
| Temp Coefficient | 20ppm/°C typical; guarantees <±8mV total VREF drift over full –40°C to +125°C range |
| ZKA | 0.15Ω typical dynamic impedance; provides low-noise, high-stability reference under load transients |
| Operating Temp | –40°C to +125°C; qualified for automotive under-hood and industrial control environments |
Pinout & Package
SOT23-3 package (2.3mm × 1.2mm footprint, 1.1mm height) with JEDEC-standard lead pitch (0.95mm). Lead finish: matte tin; moisture sensitivity level: MSL3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode) | Current return path | Connected to system ground or return rail; completes shunt current loop |
| 2 (Cathode) | Regulated output node | Drives feedback input of primary-side controller or connects to transformer bias winding |
| 3 (Ref) | Precision reference input | Connects to resistor divider midpoint; senses output voltage for regulation |
Key Features
| Feature | Design Value |
|---|---|
| Programmable VOUT | Set from 2.495V to 36V using two external resistors-no trimming required |
| Capacitive Load Stability | Stable with ≥100µF output capacitance; eliminates need for series damping resistors |
| Low Temperature Drift | 5mV typical ∆VREF over –40°C to +125°C-critical for battery-powered medical monitors |
| Low Output Noise | Sub-10µV RMS noise floor; preserves signal integrity in ADC reference paths |
| RoHS/Green Compliance | Halogen- and antimony-free; <900ppm Br/Cl, <1000ppm Sb-meets IPC-1752A Tier 1 reporting |
Applications
| USB-C Power Delivery Adapter | Industrial 24V DC-DC Converter |
|---|---|
Use Scenario: Regulates 20V PPS output in compact 65W GaN adapter with ±20mV accuracy requirement. IC Role / Device Role / Timing Role: Shunt reference in optocoupler-coupled secondary-side feedback loop. Use Value: Enables 0.5% output tolerance compliance with USB PD 3.1 specification without calibration. |
Use Scenario: Provides isolated 5V auxiliary supply for PLC I/O modules operating at –40°C ambient. IC Role / Device Role / Timing Role: Precision voltage reference for TL431-replacement feedback in flyback controller. Use Value: Maintains regulation stability across full industrial temperature range with no derating. |
| Laptop AC Adapter | Automotive Infotainment Power Rail |
Use Scenario: Sets 19.5V output in 90W laptop charger with multi-level OVP/OCP protection. IC Role / Device Role / Timing Role: Error amplifier reference in primary-side regulated quasi-resonant topology. Use Value: Delivers 0.15Ω dynamic impedance to suppress ripple-induced feedback errors. |
Use Scenario: Generates 3.3V reference for CAN FD transceiver bias in head unit power management IC. IC Role / Device Role / Timing Role: Stable shunt reference for analog front-end monitoring circuitry. Use Value: Meets AEC-Q100 Grade 2 (–40°C to +105°C) requirements with 5mV max drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable shunt regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431ACDR | 2.495V VREF, ±1% tolerance, 0.35Ω ZKA, SOIC-8 package | Higher thermal resistance (160°C/W), larger footprint, no green/halogen-free certification | Select when legacy PCB layout reuse is required and RoHS3 compliance is not mandated |
| AS431BANTR-G1 | Same package and pinout, but ±1.0% VREF tolerance, higher 14mV ∆VREF over temperature | Lower cost; acceptable where ±1% output accuracy suffices (e.g., non-critical bias rails) | Select for cost-sensitive industrial power supplies where 1% regulation is sufficient |
Compared with TL431ACDR and AS431BANTR-G1, the AS431HANTR-G1 offers tighter 0.5% initial tolerance, lower temperature drift (5mV vs. 14mV), and certified halogen-free construction-making it optimal for space-constrained, high-accuracy, and environmentally regulated designs.
Availability
AS431HANTR-G1 is available at Aetrix Electronics and suitable for USB-C PD adapters, industrial 24V DC-DC converters, and automotive infotainment power rails requiring stable component supply, long-term lifecycle support, and RoHS3-compliant sourcing.
Supply support for AS431HANTR-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.
The AS431H belongs to Diodes' precision reference product line, engineered specifically for high-accuracy, thermally stable shunt regulation in switching power supplies, chargers, and industrial control systems.
FAQ
What is the minimum cathode current required for regulation in the AS431HANTR-G1?
The AS431HANTR-G1 requires a minimum cathode current of 0.35mA to maintain regulation, as specified in the Electrical Characteristics table under IKA(Min). This low threshold enables operation in ultra-low-power standby modes and energy-harvesting circuits where quiescent current must be minimized.
Can the AS431HANTR-G1 replace a standard Zener diode directly?
Yes-the AS431HANTR-G1 is designed as a drop-in replacement for Zener diodes in shunt regulator configurations. Its three-terminal architecture (REF/ANODE/CATHODE) replaces two-terminal Zeners while delivering superior thermal stability, lower dynamic impedance, and programmable output voltage via external resistors.
Does the AS431HANTR-G1 require an external capacitor for stability?
No external capacitor is required for basic regulation stability. The device remains stable with capacitive loads up to 100µF, as confirmed by stability boundary condition plots in the datasheet. However, a 1nF ceramic capacitor between REF and ANODE is recommended for high-frequency noise suppression in sensitive analog applications.
What is the meaning of "G1" in the part number AS431HANTR-G1?
The "G1" suffix denotes Diodes Incorporated's Green compliance designation: halogen- and antimony-free packaging with bromine/chlorine <900ppm each and antimony <1000ppm. It also indicates RoHS 3 (2015/863/EU) compliance and lead-free matte tin plating on all terminals.
AS431HANTR-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:
- Active
- Reference Type:
- Shunt
- Output Type:
- Adjustable
- Voltage - Output (Min/Fixed):
- 2.495V
- Voltage - Output (Max):
- 36 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:
- 4µA
- Current - Cathode:
- 500 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
AS431HANTR-G1 FAQ
1.How can I place an order for AS431HANTR-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AS431HANTR-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 AS431HANTR-G1 reliable?
The price and inventory of AS431HANTR-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AS431HANTR-G1 is usually 5 days.
3.What payment methods are accepted for AS431HANTR-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AS431HANTR-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AS431HANTR-G1?
AS431HANTR-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AS431HANTR-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 AS431HANTR-G1?
For technical support, including AS431HANTR-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AS431HANTR-G1 requirements.
6.How does Aetrix verify that AS431HANTR-G1 is sourced from the original manufacturer or authorized distributors?
All AS431HANTR-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 AS431HANTR-G1 meets industry standards.
7.What is the process for return or replacement of AS431HANTR-G1?
All AS431HANTR-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AS431HANTR-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 AS431HANTR-G1 part is unused and in its original packaging.
Return procedure for AS431HANTR-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AS431HANTR-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…
