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Diodes Incorporated AP432YG-13
- Part No.:
- AP432YG-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- TO-243AA
- Datasheet:
-
AP432YG-13.pdf
- Description:
- IC VREF SHUNT ADJ 1% SOT89-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,872
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Product details
Overview
AP432YG-13 from Diodes Incorporated is a 3-terminal adjustable precision shunt regulator with ±1% reference voltage tolerance (1.24 V), 200 mA sink current capability, and 0.2 Ω dynamic output impedance. It operates over –20°C to +85°C and delivers programmable output voltage from 1.24 V to 20 V using two external resistors - widely deployed in feedback loops of AC/DC adapters, LED drivers, and voltage monitors.
For engineers reviewing the AP432YG-13 datasheet, AP432YG-13 pinout, AP432YG-13 application, or AP432YG-13 equivalent, key selection criteria include cathode current regulation threshold (150 µA), temperature coefficient (30 ppm/°C), low-noise operation, and SOT89-3 thermal performance for high-current shunt regulation.
Technical Context
The AP432YG-13 implements an internal bandgap reference and high-gain error amplifier driving an NPN output stage, enabling sharp turn-on and stable regulation across load and line variations. Its active sink architecture replaces Zener diodes in closed-loop feedback paths where precision, low drift, and fast transient response are required.
It functions as a 3-terminal programmable voltage reference with cathode-anode-ref terminal configuration; regulation occurs when cathode voltage exceeds the internal 1.24 V reference by the resistor-divider ratio. Stability is maintained up to 100 µF capacitive loads depending on cathode current and programmed voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.24 V ±1% - sets minimum programmable output; enables fixed or adjustable regulation without trimming. |
| Sink Current Capacity | 200 mA - supports high-current shunt regulation in 5–24 V power supplies without external pass devices. |
| Min Cathode Current | 150 µA - ensures regulation initiates at ultra-low bias, critical for standby-mode power management. |
| Temp Coefficient | 30 ppm/°C - guarantees ≤±3 mV output drift over –20°C to +85°C, suitable for industrial-grade references. |
| Dynamic Impedance | 0.2 Ω - provides tight output regulation under dynamic load steps; reduces ripple amplification in feedback networks. |
| Output Voltage Range | 1.24 V to 20 V - set via external R1/R2 divider; eliminates need for multiple fixed-voltage regulators. |
| Operating Temp | –20°C to +85°C - validated for commercial and extended-temperature embedded power applications. |
Pinout & Package
AP432YG-13 is housed in a thermally enhanced SOT89-3 package with exposed tab for improved heat dissipation (800 mW PD rating). Pin 1 = Anode, Pin 2 = Cathode, Pin 3 = Reference - configured for direct integration into secondary-side feedback circuits.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Current return path to ground or supply rail | Completes shunt current loop; must be connected to lowest potential node in feedback network. |
| Pin 2 (Cathode) | Regulated output node / error amplifier output | Drives optocoupler LED or TL431 replacement circuit; sinks up to 200 mA to maintain VREF × (1+R1/R2). |
| Pin 3 (REF) | Reference input / error amplifier inverting input | Connects to voltage divider midpoint; senses output proportionally; determines regulation setpoint. |
Key Features
| Feature | Design Value |
|---|---|
| Precision reference tolerance | ±1% (AP432) - eliminates trim potentiometers in production, reducing BOM cost and long-term drift risk. |
| Low dynamic output impedance | 0.2 Ω - maintains regulation accuracy despite rapid load transients in SMPS feedback paths. |
| Fast turn-on response | Sub-microsecond activation - prevents output overshoot during power-up or fault recovery in regulated supplies. |
| Programmable output range | 1.24 V to 20 V - supports single-part design across multiple output voltages without redesigning reference network. |
| Lead-free & Halogen-free | SOT89-3 "Green" package (RoHS 2, <900 ppm Br/Cl, <1000 ppm Sb) - meets global environmental compliance mandates. |
Applications
| AC/DC Adapter Feedback | LED Constant-Current Driver |
|---|---|
|
Use Scenario: Secondary-side voltage sensing in isolated flyback converters powering consumer electronics. IC Role / Device Role / Timing Role: Shunt regulator providing optocoupler bias and precise output voltage feedback to primary controller. Use Value: Replaces discrete Zener + transistor with ±1% initial accuracy and 30 ppm/°C stability, improving cross-regulation and no-load efficiency. |
Use Scenario: High-brightness LED string current regulation in architectural lighting systems. IC Role / Device Role / Timing Role: Adjustable shunt reference setting constant current via sense resistor in linear LED driver topology. Use Value: Enables accurate 100–500 mA current control with <±2% total error over temperature, eliminating need for laser-trimmed resistors. |
| Over/Under-Voltage Protection | Programmable Voltage Monitor |
|
Use Scenario: Dual-threshold detection for battery-powered equipment operating from 9–16 V nominal inputs. IC Role / Device Role / Timing Role: Precision reference feeding comparator inputs to trigger shutdown when VIN falls below 8.5 V or rises above 17.2 V. Use Value: Achieves ±0.1 V trip-point accuracy using only two external resistors per threshold, reducing component count vs. dedicated supervisor ICs. |
Use Scenario: System health monitoring in industrial PLC I/O modules requiring configurable brownout detection. IC Role / Device Role / Timing Role: Programmable reference source for window comparators detecting supply deviations in real time. Use Value: Supports field-reconfigurable thresholds (e.g., 3.3 V ±5% or 5.0 V ±3%) via resistor changes - no firmware update or hardware revision needed. |
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 | ±0.5% reference tolerance, 100 mA sink current, SO-8/SOT23 packages | Limited thermal capacity and lower current drive restrict use in >100 mA shunt applications | Select when tighter initial accuracy is prioritized over current capability and thermal robustness. |
| TL431BIDBZR | ±0.5% tolerance, 100 mA sink, SOT23-3 package, higher 0.35 Ω output impedance | Lower power dissipation rating (350 mW) and reduced thermal margin in continuous 150+ mA operation | Prefer for space-constrained designs where 100 mA suffices and board area is premium. |
Compared with AZ431L and TL431BIDBZR, AP432YG-13 offers 2× higher sink current and 25% lower dynamic impedance in a thermally superior SOT89-3 package - making it optimal for high-reliability, medium-power shunt regulation where thermal headroom and regulation stiffness are critical.
Availability
AP432YG-13 is available at Aetrix Electronics and suitable for AC/DC adapters, LED drivers, and voltage supervision circuits requiring stable component supply, RoHS-compliant packaging, and extended-temperature operation.
Supply support for AP432YG-13 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-performance power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
The AP432 series belongs to Diodes' precision reference product line, engineered for high-accuracy, low-drift shunt regulation in cost-sensitive power supply feedback and voltage monitoring applications.
FAQ
What is the minimum cathode current required for regulation in AP432YG-13?
The AP432YG-13 requires a minimum cathode current of 150 µA to maintain regulation. This low threshold enables stable operation in ultra-low-power standby modes and energy-harvesting circuits where bias current is severely constrained.
Can AP432YG-13 replace a Zener diode directly in existing designs?
Yes - AP432YG-13 can directly replace Zener diodes in shunt regulator configurations. Its active output stage provides sharper knee characteristics, lower dynamic impedance (0.2 Ω vs. typical Zener's 5–20 Ω), and ±1% reference accuracy without temperature-compensating diodes.
Is AP432YG-13 suitable for automotive applications?
No - AP432YG-13 is specified for –20°C to +85°C operation and is not AEC-Q200 qualified. For automotive use, Diodes recommends the AZ431L-A or AP432A variants with extended temperature grades and qualification documentation.
How does the SOT89-3 package improve thermal performance over SOT23?
The SOT89-3 package features an exposed copper tab that lowers thermal resistance to ambient (θJA ≈ 125°C/W vs. ~200°C/W for SOT23), enabling 800 mW power dissipation - critical for sustained 200 mA sink operation without derating in compact PCB layouts.
AP432YG-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- TO-243AA
- 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:
- ±1%
- 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:
- SOT-89-3
AP432YG-13 FAQ
1.How can I place an order for AP432YG-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP432YG-13 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 AP432YG-13 reliable?
The price and inventory of AP432YG-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP432YG-13 is usually 5 days.
3.What payment methods are accepted for AP432YG-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP432YG-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP432YG-13?
AP432YG-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP432YG-13 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 AP432YG-13?
For technical support, including AP432YG-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP432YG-13 requirements.
6.How does Aetrix verify that AP432YG-13 is sourced from the original manufacturer or authorized distributors?
All AP432YG-13 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 AP432YG-13 meets industry standards.
7.What is the process for return or replacement of AP432YG-13?
All AP432YG-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP432YG-13, 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 AP432YG-13 part is unused and in its original packaging.
Return procedure for AP432YG-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP432YG-13 Tags
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