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Diodes Incorporated AP431SHANTR-G1
- Part No.:
- AP431SHANTR-G1
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AP431SHANTR-G1.pdf
- Description:
- IC VREF SHUNT ADJ 0.5% SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:12,209
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Product details
Overview
AP431SHANTR-G1 from Diodes Incorporated is a 3-terminal adjustable precision shunt regulator with 2.495V reference voltage (±0.5% tolerance at +25°C), 50μA typical minimum cathode current for regulation, 0.1Ω typical dynamic impedance, and operation up to 36V cathode voltage - used as a low-power Zener replacement in feedback loops of switching power supplies, USB chargers, and voltage adapters.
For engineers reviewing the AP431SHANTR-G1 datasheet, AP431SHANTR-G1 pinout, AP431SHANTR-G1 application, or AP431SHANTR-G1 equivalent, this device supports precision voltage setting from 2.495V to 36V, delivers stable regulation down to ultra-low 100μA max cathode current, maintains ±11mV reference deviation over –40°C to +125°C, and is qualified for industrial-temperature embedded power control designs.
Technical Context
The AP431SHANTR-G1 implements a bandgap-based 2.495V reference with high-gain error amplifier driving an NPN output stage, enabling sharp turn-on and low temperature coefficient (typ. 11mV over full range). Its architecture supports stable operation under capacitive loads up to 100µF without oscillation.
It operates as a 3-terminal programmable shunt: REF senses voltage divider output, ANODE connects to system ground, and CATHODE sinks current to regulate output voltage via external resistor network - delivering sink current from 100µA to 100mA with <0.3Ω dynamic impedance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.495V ±0.5% at +25°C - sets precise regulation threshold for feedback networks |
| Min Cathode Current | 50μA typ., 100μA max - enables regulation in ultra-low-power standby modes |
| Dynamic Impedance | 0.1Ω typ. - ensures minimal output voltage shift under load transients |
| Cathode Voltage Range | 2.495V to 36V - supports wide-output adjustable regulators without external series pass devices |
| Temp Range | –40°C to +125°C - suitable for industrial and automotive under-hood applications |
| Ref Voltage Drift | ±11mV max over –40°C to +125°C - guarantees tight output stability across thermal extremes |
| Sink Current Range | 100µA to 100mA - accommodates both light-load biasing and high-current error correction |
Pinout & Package
AP431SHANTR-G1 is packaged in SOT23 (Package Code: N), a surface-mount 3-pin transistor outline with 1.27mm lead pitch and 2.3×2.5mm footprint. Thermal resistance θJC is 140°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (REF) | Reference input | High-impedance node sensing divided output voltage; draws only 0.2–0.5µA |
| Pin 2 (ANODE) | Anode connection | Connected to system ground; forms return path for cathode sink current |
| Pin 3 (CATHODE) | Cathode output | Sinks regulated current to maintain VOUT; handles up to 100mA continuous |
Key Features
| Feature | Design Value |
|---|---|
| Low regulation current | 50μA typical minimum cathode current enables use in energy-harvesting and battery-backed systems |
| Precision reference | 2.495V ±0.5% initial tolerance ensures accurate voltage setting without trimming |
| Capacitive load stability | Stable with ≥100µF output capacitance - eliminates need for external compensation in SMPS feedback |
| Wide temperature stability | ±11mV reference deviation over –40°C to +125°C reduces calibration overhead in harsh environments |
| Green packaging | Totally lead-free, halogen- and antimony-free SOT23 package compliant with RoHS 3 and IEC 61249-2-21 |
Applications
| USB-C Charger Feedback | Industrial DC-DC Converter |
|---|---|
Use Scenario: Regulates 5V/9V/15V/20V output in USB PD power adapters using optocoupler-isolated feedback loop. IC Role / Device Role / Timing Role: Adjustable shunt regulator providing precise voltage reference to optocoupler LED driver. Use Value: 50μA min cathode current allows reliable regulation during low-load/no-load conditions common in USB-C standby states. | Use Scenario: Sets output voltage in 24V-to-5V isolated flyback converter for PLC I/O modules. IC Role / Device Role / Timing Role: Primary-side voltage reference in secondary-side feedback circuit with TL431-compatible topology. Use Value: ±0.5% reference tolerance and ±11mV temp drift ensure <±1% output accuracy across –40°C to +70°C operating range. |
| Graphic Card VRM Monitor | Smart Home Power Adapter |
Use Scenario: Monitors GPU core voltage (0.8–1.2V) via resistor divider and triggers overvoltage protection. IC Role / Device Role / Timing Role: Precision shunt element in fast-response OVP latch circuit with comparator interface. Use Value: 0.1Ω dynamic impedance ensures rapid response to voltage spikes without overshoot or delay. | Use Scenario: Provides stable 3.3V auxiliary rail in Wi-Fi router AC/DC adapter with multi-output transformer. IC Role / Device Role / Timing Role: Secondary-side shunt regulator controlling auxiliary winding feedback for main output regulation. Use Value: SOT23 package enables compact layout on space-constrained PCBs while maintaining thermal performance up to +125°C ambient. |
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 ref, ±1% tolerance, 100μA min cathode current, SOT23-3 | Higher min cathode current increases quiescent loss in ultra-low-power designs | Select when cost sensitivity outweighs standby current requirements |
| AP431SAANTR-G1 | 2.500V ref, ±0.5% tolerance, same 50μA min cathode current, identical SOT23 package | 0.005V higher reference shifts output setpoint; requires resistor recalibration | Choose for legacy 2.5V designs where existing feedback dividers are optimized for 2.5V |
Compared with TL431ACDBVR and AP431SAANTR-G1, the AP431SHANTR-G1 uniquely combines 2.495V reference, ±0.5% tolerance, and 50μA typical regulation current - making it optimal for next-generation USB PD adapters and industrial converters demanding lowest possible no-load power loss.
Availability
AP431SHANTR-G1 is available at Aetrix Electronics and suitable for USB-C charger design, industrial DC-DC converter development, and smart home power adapter production requiring stable component supply and long-term lifecycle support.
Supply support for AP431SHANTR-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 AP431S/AP431SH product line targets high-accuracy, low-quiescent-power shunt regulation in power supply feedback paths - specifically engineered to replace Zener diodes in switching converters, chargers, and voltage adapters where thermal stability and low minimum cathode current are critical.
FAQ
What is the maximum cathode voltage rating for AP431SHANTR-G1?
The absolute maximum cathode voltage (VKA) is 40V, but the recommended operating maximum is 36V. Exceeding 36V risks violating the device's safe operating area and may cause premature failure. The 36V limit ensures stable regulation while maintaining specified reference voltage accuracy and thermal performance within the –40°C to +125°C ambient range.
Can AP431SHANTR-G1 replace TL431 in existing designs?
Yes - AP431SHANTR-G1 is pin-compatible with TL431 in SOT23 packages and shares identical pinout (REF-ANODE-CATHODE), electrical function, and gain characteristics. However, its 2.495V reference (vs. TL431's 2.495V nominal) and tighter ±0.5% tolerance require verification of output voltage accuracy; resistor values may need minor adjustment to maintain target VOUT.
Does AP431SHANTR-G1 require external compensation for stability?
No external compensation is required. The device is internally compensated and remains stable with output capacitances up to 100µF, as confirmed by Diodes' stability boundary testing across cathode voltages (5V–15V) and load currents. This eliminates the need for series RC networks commonly used with older shunt regulators in SMPS feedback loops.
Is AP431SHANTR-G1 qualified for automotive applications?
AP431SHANTR-G1 is not AEC-Q100 qualified. It is rated for industrial temperature range (–40°C to +125°C) and RoHS 3 compliance, but lacks automotive-specific change control, PPAP documentation, or IATF 16949-manufactured lot traceability. For automotive use, contact Diodes Incorporated directly to request AEC-Q100-qualified variants such as AP431SHQxxx-G1.
AP431SHANTR-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:
- -
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 100 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
AP431SHANTR-G1 FAQ
1.How can I place an order for AP431SHANTR-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP431SHANTR-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 AP431SHANTR-G1 reliable?
The price and inventory of AP431SHANTR-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP431SHANTR-G1 is usually 5 days.
3.What payment methods are accepted for AP431SHANTR-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP431SHANTR-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP431SHANTR-G1?
AP431SHANTR-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP431SHANTR-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 AP431SHANTR-G1?
For technical support, including AP431SHANTR-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP431SHANTR-G1 requirements.
6.How does Aetrix verify that AP431SHANTR-G1 is sourced from the original manufacturer or authorized distributors?
All AP431SHANTR-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 AP431SHANTR-G1 meets industry standards.
7.What is the process for return or replacement of AP431SHANTR-G1?
All AP431SHANTR-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AP431SHANTR-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 AP431SHANTR-G1 part is unused and in its original packaging.
Return procedure for AP431SHANTR-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP431SHANTR-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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