My Inquiry
My Account
Diodes Incorporated AP432ARG-7
- Part No.:
- AP432ARG-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AP432ARG-7.pdf
- Description:
- IC VREF SHUNT ADJ 0.5% SC59R
- Quantity:
- Payment:
- Shipping:
Inventory:3,705
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP432ARG-7 from Diodes Incorporated is a 3-terminal adjustable precision shunt regulator with 1.24V ±1% reference voltage, 200mA sink current capability, and 0.2Ω dynamic output impedance. It operates over –20°C to +85°C and sets output voltage from 1.24V to 20V via external resistor divider-enabling precise voltage monitoring, over/under-voltage protection, and current limiting in power supply feedback loops.
For engineers reviewing the AP432ARG-7 datasheet, AP432ARG-7 pinout, AP432ARG-7 application, or AP432ARG-7 equivalent, key selection criteria include reference tolerance (±1%), cathode current range (150μA–200mA), temperature coefficient (30 ppm/°C), and SOT25 package compatibility with standard PCB layouts for isolated feedback paths.
Technical Context
The AP432ARG-7 implements a bandgap-based precision reference with active output circuitry enabling sharp turn-on characteristics and low 0.2Ω dynamic impedance-critical for stable regulation under fast load transients. Its internal error amplifier compares the divided cathode voltage against VREF and drives the cathode terminal to maintain regulation.
It functions as a programmable two-terminal shunt device where anode connects to ground or low-impedance return, cathode sinks current from the regulated node, and REF senses the feedback divider midpoint. The device requires ≥150μA minimum cathode current to maintain regulation and exhibits <1.2μA reference input current variation across temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VREF | 1.24V ±1% - defines base accuracy of all programmed output voltages |
| Sink Current | 200mA max - supports high-current shunt regulation without external pass devices |
| Min Cathode Current | 150μA - ensures regulation starts at very light loads, enabling low-power standby operation |
| Temp Coefficient | 30 ppm/°C - guarantees ≤±3mV drift over –20°C to +85°C for stable long-term performance |
| Dynamic Impedance | 0.2Ω typical - minimizes output voltage perturbation during transient current steps |
| Output Voltage Range | 1.24V to 20V - set by external R1/R2 divider; enables flexible system-level voltage scaling |
| Operating Temp | –20°C to +85°C - suitable for industrial-grade power supplies and embedded control modules |
Pinout & Package
AP432ARG-7 is supplied in the SOT25 (SC-74A) surface-mount package: 3-pin, 2.8mm × 2.9mm footprint, 1.1mm height, RoHS-compliant lead-free finish. Pin 1 = Cathode, Pin 2 = Anode, Pin 3 = REF, Pin 4 = NC, Pin 5 = Anode (dual-anode configuration improves thermal and current-handling symmetry).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (CATHODE) | Current Sink Terminal | Connects to regulated node; sinks up to 200mA to maintain VOUT = VREF × (1 + R1/R2) |
| Pin 2 (ANODE) | Reference Return Path | Low-impedance ground connection for internal reference and error amplifier |
| Pin 3 (REF) | Feedback Sense Input | High-impedance input for resistor divider midpoint; draws only ~1.4–3.5μA |
| Pin 4 (NC) | No Connect | Internally unconnected; must be left floating or tied to ground per layout best practice |
| Pin 5 (ANODE) | Secondary Return Path | Dual-anode structure reduces thermal resistance and improves current sharing in high-power shunt applications |
Key Features
| Feature | Design Value |
|---|---|
| Precision Reference Voltage | 1.24V ±1% - eliminates need for trim pots in factory-calibrated power supplies |
| Low Dynamic Output Impedance | 0.2Ω - maintains tight regulation during rapid load changes in SMPS feedback loops |
| Programmable Output Range | 1.24V–20V - supports single-part design across multiple output rails (e.g., 3.3V, 5V, 12V, 15V) |
| Fast Turn-On Response | Sub-microsecond activation - enables reliable overvoltage crowbar triggering and delay timing circuits |
| Low Output Noise | Typical <10µVRMS - avoids noise coupling into sensitive analog or ADC reference paths |
Applications
| Over-Voltage / Under-Voltage Protection | Constant-Current Sink |
|---|---|
|
Use Scenario: Monitoring DC bus voltage in industrial PLC power modules to disable downstream loads if voltage exceeds 28V or drops below 20V. IC Role / Device Role / Timing Role: Precision shunt regulator configured as dual-threshold comparator using two resistor dividers and external transistors. Use Value: Achieves ±0.5% trip accuracy over temperature without calibration, replacing discrete op-amp + reference solutions. |
Use Scenario: Providing stable 100mA bias current to a GaN HEMT gate driver stage in a 48V telecom rectifier. IC Role / Device Role / Timing Role: Shunt-connected constant-current source where IOUT = VREF/RCL. Use Value: Delivers 100mA with <±2% error across line and load variations-reducing component count vs. op-amp + MOSFET designs. |
| Higher-Current Shunt Regulator | Voltage Monitor for Microcontroller Reset |
|
Use Scenario: Replacing Zener diodes in 12V auxiliary rail regulation for automotive body control modules requiring >150mA sink capability. IC Role / Device Role / Timing Role: Primary shunt regulator with external NPN transistor boosting total sink current to 1.5A. Use Value: Enables stable 12.0V ±1.2% output with 0.2Ω effective impedance-improving ripple rejection by 20dB vs. 1N4742A Zener. |
Use Scenario: Generating a clean, temperature-stable reset signal for an ARM Cortex-M4 MCU when main 3.3V rail falls below 3.0V. IC Role / Device Role / Timing Role: Adjustable threshold detector feeding open-drain output to microcontroller's nRESET pin. Use Value: Provides 3.0V reset threshold with ±15mV accuracy over –40°C to +105°C-eliminating need for external voltage supervisor IC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable shunt regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AZ431L | 1.24V ±0.5%, 100mA sink, SO-8/SOT23 packages, no dual-anode pinout | Lacks Pin 5 (second anode); lower current rating limits use in >100mA shunt configurations | Preferred for cost-sensitive, lower-current designs where ±0.5% tolerance justifies trade-off in thermal robustness |
| TL431BIDBZR | 1.24V ±0.5%, 100mA sink, SOT23-3, no NC or dual-anode pins | Single-anode, 3-pin layout simplifies routing but increases thermal resistance at >75mA | Better for space-constrained consumer boards; not recommended for industrial 200mA shunt needs |
Compared with AZ431L and TL431BIDBZR, AP432ARG-7 offers higher sink current (200mA vs. 100mA), dual-anode thermal management, and SOT25 layout compatibility-making it optimal for industrial power supplies requiring robust, field-proven shunt regulation above 100mA.
Availability
AP432ARG-7 is available at Aetrix Electronics and suitable for industrial power supplies, telecom rectifiers, and embedded control modules requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for AP432ARG-7 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 components for power management, signal integrity, and connectivity applications.
The AP432 series belongs to Diodes' precision reference product line, designed specifically for high-accuracy, low-drift shunt regulation in industrial, computing, and telecom power systems where Zener replacement and programmable voltage setting are required.
FAQ
What is the minimum cathode current required for AP432ARG-7 to regulate?
The AP432ARG-7 requires a minimum cathode current of 150μA to maintain regulation across its full operating temperature range (–20°C to +85°C). This value is specified in the Electrical Characteristics table under IKA(MIN) and verified at VKA = VREF. Below this threshold, the device exits regulation and output voltage becomes undefined.
Can AP432ARG-7 replace a standard Zener diode directly on a PCB?
Yes-AP432ARG-7 can directly replace Zener diodes in most shunt regulator applications, provided the external resistor divider is added between cathode and REF pins. Unlike Zeners, it requires three connections (cathode, anode, REF) and delivers tighter tolerance (±1% vs. ±5%), lower dynamic impedance (0.2Ω vs. 10–50Ω), and superior temperature stability (30 ppm/°C vs. 50–100 ppm/°C).
Why does AP432ARG-7 have five pins when only three terminals are electrically active?
AP432ARG-7 uses a 5-pin SOT25 package with Pins 1 (CATHODE), 2 (ANODE), 3 (REF), 4 (NC), and 5 (ANODE). Pin 5 duplicates Pin 2 to reduce thermal resistance and improve current handling-especially critical at 200mA sink levels. Pin 4 is internally unconnected and must remain floating or grounded per layout guidelines to avoid parasitic coupling.
Is AP432ARG-7 suitable for use in automotive applications?
AP432ARG-7 is rated for –20°C to +85°C operation and meets RoHS and halogen-free requirements, but it is not AEC-Q200 qualified. For automotive applications requiring extended temperature range (–40°C to +125°C) or qualification, Diodes Incorporated recommends the AEC-Q200–qualified AZ431L or TL431 variants-AP432ARG-7 is intended for industrial and telecom equipment where ambient conditions remain within its specified range.
AP432ARG-7 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):
- 1.24V
- Voltage - Output (Max):
- 20 V
- Current - Output:
- 200 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 30ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 300 µA
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-59R
AP432ARG-7 FAQ
1.How can I place an order for AP432ARG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP432ARG-7 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 AP432ARG-7 reliable?
The price and inventory of AP432ARG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP432ARG-7 is usually 5 days.
3.What payment methods are accepted for AP432ARG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP432ARG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP432ARG-7?
AP432ARG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP432ARG-7 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 AP432ARG-7?
For technical support, including AP432ARG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP432ARG-7 requirements.
6.How does Aetrix verify that AP432ARG-7 is sourced from the original manufacturer or authorized distributors?
All AP432ARG-7 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 AP432ARG-7 meets industry standards.
7.What is the process for return or replacement of AP432ARG-7?
All AP432ARG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP432ARG-7, 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 AP432ARG-7 part is unused and in its original packaging.
Return procedure for AP432ARG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP432ARG-7 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…
