My Inquiry
My Account
Diodes Incorporated AS431HMANTR-G1
- Part No.:
- AS431HMANTR-G1
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AS431HMANTR-G1.pdf
- Description:
- IC VREF SHUNT ADJ 0.5% SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,172
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AS431HMANTR-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 for stable voltage reference in switching power supplies, chargers, and precision regulators.
For engineers reviewing the AS431HMANTR-G1 datasheet, AS431HMANTR-G1 pinout, AS431HMANTR-G1 application, or AS431HMANTR-G1 equivalent, key selection factors include its mirror-pinout SOT23 package, -40°C to +125°C operating range, 0.5mA minimum regulation current, and low 5mV typical reference voltage deviation over full temperature range.
Technical Context
The AS431HMANTR-G1 implements a bandgap-based precision reference core with internal error amplifier and output stage optimized for shunt regulation. Its functional block diagram shows direct feedback from cathode to reference input, enabling programmable output via external resistor divider.
It operates as a two-quadrant device: sinking cathode current (0.5–100mA) while maintaining stable reference voltage at the REF pin. The mirror pin-out configuration (REF–CATHODE–ANODE on pins 1–2–3) enables PCB layout compatibility with legacy designs requiring reversed terminal routing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VREF | 2.495V nominal; sets minimum programmable output voltage with ±0.5% initial accuracy. |
| VKA max | 36V; maximum cathode-to-anode voltage for adjustable output configuration. |
| IKA range | 0.5mA to 100mA; defines usable sink current window for stable regulation. |
| Tempco | 20ppm/°C typical; ensures ≤16mV total reference drift from -40°C to +125°C. |
| ZKA | 0.15Ω typical; provides low-output-impedance reference for high-loop-gain feedback. |
| Operating temp | -40°C to +125°C; supports industrial and automotive under-hood applications. |
| Package | SOT23 with mirror pin-out (Pin 1=REF, Pin 2=CATHODE, Pin 3=ANODE). |
Pinout & Package
AS431HMANTR-G1 is housed in a RoHS-compliant, lead-free SOT23 package with mirror pin-out configuration. This variant places REF on pin 1, CATHODE on pin 2, and ANODE on pin 3 - distinct from standard SOT23 shunt regulators.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (REF) | Reference input | High-impedance node connected to internal bandgap; sets regulation threshold via external resistor divider. |
| Pin 2 (CATHODE) | Output/sink terminal | Carries regulated cathode current; connects to supply rail or feedback node of DC-DC converter. |
| Pin 3 (ANODE) | Ground return | Low-impedance return path for cathode current; must be tied to system ground or common reference point. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable output range | 2.495V to 36V via two-resistor divider - eliminates need for multiple Zener diodes. |
| Capacitive load stability | Stable up to 100µF without oscillation - simplifies EMI filtering in power supply outputs. |
| Low noise performance | Sub-10µV RMS output noise - critical for precision ADC references and sensor signal chains. |
| Thermal stability | 5mV typical reference deviation over -40°C to +125°C - enables unheated industrial operation. |
| RoHS/Green compliance | Halogen- and antimony-free, <900ppm Br/Cl, <1000ppm Sb - meets automotive and EU environmental mandates. |
Applications
| Chargers | Switching Power Supplies |
|---|---|
|
Use Scenario: Constant-voltage stage in USB PD and fast-charging adapters. IC Role / Device Role / Timing Role: Precision shunt reference for feedback loop of secondary-side controller. Use Value: Enables ±0.5% output voltage accuracy across temperature, improving battery charging consistency and longevity. |
Use Scenario: Voltage sensing in isolated flyback and forward converters. IC Role / Device Role / Timing Role: Primary-side referenced shunt regulator providing optocoupler bias and feedback reference. Use Value: Low 0.15Ω dynamic impedance ensures minimal loop gain variation, improving transient response and cross-regulation. |
| Graphic Cards | Precision Voltage References |
|
Use Scenario: GPU core voltage monitoring and VRM calibration. IC Role / Device Role / Timing Role: High-stability reference for ADC-based rail telemetry and closed-loop margining. Use Value: 20ppm/°C tempco and 5mV max drift allow accurate voltage reporting over full board thermal profile. |
Use Scenario: Calibration reference in portable test equipment and data acquisition systems. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage source for DAC/ADC reference buffers. Use Value: Sub-10µV RMS noise and 0.5% initial tolerance support 16-bit+ measurement accuracy without trimming. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable shunt regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431CDBVR | Standard pin-out (REF–ANODE–CATHODE), 2% VREF tolerance, higher 0.3Ω ZKA. | Limited to commercial temp range (-40°C to +85°C); unsuitable for extended-temperature industrial use. | Select when cost sensitivity outweighs precision and temperature range requirements. |
| AS431HANTR-G1 | Identical electrical specs but normal SOT23 pin-out (REF–ANODE–CATHODE); same 0.5% tolerance and -40°C to +125°C rating. | Requires PCB redesign for pin mapping; no change in thermal or regulation performance. | Select when legacy layout compatibility with standard pin-out is required. |
Compared with TL431CDBVR, AS431HMANTR-G1 offers tighter 0.5% tolerance, lower 0.15Ω impedance, and guaranteed operation to +125°C - making it superior for high-reliability industrial feedback loops. Versus AS431HANTR-G1, the mirror pin-out enables drop-in replacement in space-constrained layouts where cathode routing conflicts with standard pin assignments.
Availability
AS431HMANTR-G1 is available at Aetrix Electronics and suitable for switching power supplies, fast chargers, and precision voltage references requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AS431HMANTR-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, specializing in high-reliability power management, signal integrity, and protection solutions.
The AS431H series belongs to Diodes' precision reference product line, engineered specifically for industrial-grade shunt regulation in space-constrained, thermally demanding environments where Zener diode alternatives lack stability and accuracy.
FAQ
What is the pin configuration of AS431HMANTR-G1?
AS431HMANTR-G1 uses a mirror pin-out in SOT23: Pin 1 = REF, Pin 2 = CATHODE, Pin 3 = ANODE. This differs from the standard SOT23 shunt regulator layout and must be verified in PCB layout to avoid reverse-bias or open-loop conditions.
Can AS431HMANTR-G1 replace a Zener diode directly?
Yes - AS431HMANTR-G1 replaces Zener diodes in adjustable shunt configurations using two external resistors. Unlike Zeners, it provides 0.5% initial accuracy, 20ppm/°C tempco, and stable regulation down to 0.5mA cathode current, eliminating calibration and thermal drift issues.
What is the minimum cathode current needed for regulation?
The AS431HMANTR-G1 requires a minimum cathode current of 0.35mA (typical) and 0.5mA (guaranteed) to maintain regulation. Below this threshold, reference voltage accuracy degrades and dynamic impedance rises significantly.
Is AS431HMANTR-G1 qualified for automotive applications?
No - AS431HMANTR-G1 is not AEC-Q100 qualified. While it operates from -40°C to +125°C and is RoHS/Green compliant, Diodes specifies that automotive-grade variants require explicit PPAP capability and IATF 16949 manufacturing - which this part does not carry.
AS431HMANTR-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
AS431HMANTR-G1 FAQ
1.How can I place an order for AS431HMANTR-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AS431HMANTR-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 AS431HMANTR-G1 reliable?
The price and inventory of AS431HMANTR-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AS431HMANTR-G1 is usually 5 days.
3.What payment methods are accepted for AS431HMANTR-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AS431HMANTR-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AS431HMANTR-G1?
AS431HMANTR-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AS431HMANTR-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 AS431HMANTR-G1?
For technical support, including AS431HMANTR-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AS431HMANTR-G1 requirements.
6.How does Aetrix verify that AS431HMANTR-G1 is sourced from the original manufacturer or authorized distributors?
All AS431HMANTR-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 AS431HMANTR-G1 meets industry standards.
7.What is the process for return or replacement of AS431HMANTR-G1?
All AS431HMANTR-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AS431HMANTR-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 AS431HMANTR-G1 part is unused and in its original packaging.
Return procedure for AS431HMANTR-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AS431HMANTR-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…
