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Diodes Incorporated AP432AWG-7
- Part No.:
- AP432AWG-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AP432AWG-7.pdf
- Description:
- IC VREF SHUNT ADJ 0.5% SC59-3
- Quantity:
- Payment:
- Shipping:
Inventory:215
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Product details
Overview
AP432AWG-7 from Diodes Incorporated is a 3-terminal adjustable precision shunt regulator with ±0.5% reference voltage tolerance, 1.24 V nominal VREF, and guaranteed thermal stability over −20°C to +85°C. It delivers up to 200 mA sink current, features 0.2 Ω dynamic output impedance, and supports programmable output voltages from 1.24 V to 20 V using two external resistors - widely used in feedback loops of isolated DC-DC converters and voltage monitors.
For engineers reviewing the AP432AWG-7 datasheet, AP432AWG-7 pinout, AP432AWG-7 application, or AP432AWG-7 equivalent, this device serves as a high-accuracy Zener replacement in power supply regulation, overvoltage protection, and precision current sinking - where tight reference tolerance, low tempco (30 ppm/°C), and sharp turn-on response are critical.
Technical Context
The AP432AWG-7 implements an internal bandgap reference amplifier driving an NPN output stage, enabling precise cathode-to-reference voltage control via external resistor dividers. Its active output circuitry ensures fast turn-on and stable regulation down to 150 µA minimum cathode current.
It operates as a 3-terminal shunt regulator: cathode sinks current to ground when VKA exceeds the programmed threshold (VREF × (1 + R₁/R₂)), with reference input (REF) sensing the divider node and anode tied to system ground. Dynamic output impedance remains ≤0.5 Ω across 0.1–15 mA cathode current swing at ≤1 kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VREF Tolerance | ±0.5% - enables fixed-output regulation without trim potentiometers, reducing BOM cost and long-term drift. |
| Reference Voltage | 1.24 V (typical) - sets minimum programmable output; defines accuracy baseline for all derived voltages. |
| Max Cathode Current | 200 mA - supports high-current shunt regulation and crowbar circuits without external pass devices. |
| Temp Coefficient | 30 ppm/°C - ensures <±3 mV drift over −20°C to +85°C, critical for industrial temperature stability. |
| Dynamic Impedance | 0.2 Ω (typical) - maintains tight output regulation under dynamic load transients in feedback networks. |
| Min Cathode Current | 150 µA - allows stable regulation even in ultra-low-power bias networks or high-resistance dividers. |
| Output Voltage Range | 1.24 V to 20 V - achieved with standard resistor ratios; avoids need for multiple fixed-voltage regulators. |
Pinout & Package
AP432AWG-7 is packaged in SC59 (SOT-23-5 compatible outline), a 3-pin surface-mount package with gull-wing leads and RoHS-compliant lead-free finish. Pin 1 = Anode (ground reference), Pin 2 = Cathode (current sink terminal), Pin 3 = REF (reference input).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1: Anode | Ground return path for internal reference and output stage | Must be connected directly to system ground plane; forms common reference for VKA measurement. |
| Pin 2: Cathode | Current-sinking output terminal | Sinks regulated current to ground; voltage at this node defines regulated output in shunt configuration. |
| Pin 3: REF | High-impedance reference input | Connects to resistor divider midpoint; draws only 1.4–3.5 µA, minimizing divider loading error. |
Key Features
| Feature | Design Value |
|---|---|
| Precision reference voltage | 1.24 V ±0.5% - eliminates need for post-production calibration or trimming in mid-accuracy power supplies. |
| Low dynamic output impedance | 0.2 Ω - sustains regulation during rapid load steps in SMPS feedback paths without added compensation. |
| Sharp turn-on response | Active NPN output stage - reduces regulation delay vs. passive Zener diodes, improving transient immunity. |
| Programmable output range | 1.24 V to 20 V - one device replaces multiple fixed shunt regulators, simplifying inventory and design reuse. |
| Low reference input current | 1.4–3.5 µA - permits use of high-value resistors in voltage dividers, lowering quiescent power in battery systems. |
Applications
| Isolated Flyback Feedback | Overvoltage Protection |
|---|---|
|
Use Scenario: Secondary-side voltage sensing in AC/DC flyback converters with optocoupler feedback. IC Role / Device Role / Timing Role: Shunt regulator providing precise reference to optocoupler LED drive circuit. Use Value: ±0.5% VREF and 30 ppm/°C tempco ensure <±2% output voltage accuracy across line, load, and temperature. |
Use Scenario: Monitoring input rail voltage to trigger shutdown before downstream IC damage. IC Role / Device Role / Timing Role: Adjustable threshold detector using resistor divider and comparator interface. Use Value: Programmable trip point from 1.24 V to 20 V enables single-BOM support for multiple input voltage classes. |
| Constant-Current Sink | Adjustable Linear Regulator |
|
Use Scenario: LED biasing or sensor excitation requiring stable current independent of supply variation. IC Role / Device Role / Timing Role: Precision current source formed by REF pin connected to sense resistor to ground. Use Value: 150 µA min cathode current and 0.2 Ω impedance enable accurate 1–200 mA sinking with <1% error. |
Use Scenario: Low-noise local regulation for analog subsystems where LDO dropout is prohibitive. IC Role / Device Role / Timing Role: Shunt-based linear regulator with series pass transistor controlled by AP432AWG-7 reference. Use Value: Low output noise and sharp turn-on allow clean regulation in audio and ADC reference applications. |
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% VREF, 1.24 V, but rated for only 100 mA max cathode current and higher 0.5 Ω typical ZKA | Limited to lower-power regulation; unsuitable for >100 mA crowbar or high-current sink designs | Select AZ431L only when cathode current stays below 100 mA and board space favors SOT-23-3 over SC59. |
| TL431BIDBZR | ±0.5% VREF, 2.495 V nominal, 100 mA max cathode current, requires external resistor scaling for <2.495 V outputs | Cannot regulate below 2.495 V without level-shifting circuitry; incompatible with 1.24 V–2.49 V range | Choose TL431BIDBZR only if system already uses 2.5 V references and design tolerates fixed VREF architecture. |
Compared with AZ431L and TL431BIDBZR, AP432AWG-7 offers superior 200 mA sink capability and lower 0.2 Ω output impedance - making it uniquely suitable for high-current shunt regulation and wide-range programmability without external level shifters.
Availability
AP432AWG-7 is available at Aetrix Electronics and suitable for isolated DC-DC feedback, overvoltage protection, and constant-current sink applications requiring stable component supply, long-lifecycle availability, and RoHS-compliant packaging.
Supply support for AP432AWG-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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
AP432AWG-7 belongs to Diodes' precision shunt regulator product line, engineered for high-accuracy voltage reference and regulation in cost-sensitive, space-constrained power systems where Zener diodes fall short on stability and adjustability.
FAQ
What is the maximum output voltage achievable with AP432AWG-7?
The AP432AWG-7 supports programmable output voltages up to 20 V, set by the external resistor divider network (VOUT = VREF × (1 + R₁/R₂)). This limit is defined by the absolute maximum cathode voltage rating of 20 V and applies across the full operating temperature range.
Can AP432AWG-7 replace a standard Zener diode directly?
Yes - AP432AWG-7 can directly replace Zener diodes in shunt regulation applications, offering tighter tolerance (±0.5%), lower dynamic impedance (0.2 Ω vs. typical 5–20 Ω for Zeners), and sharper turn-on. However, it requires three connections (anode, cathode, REF) versus two for a Zener, so PCB layout must accommodate the third pin.
What is the minimum cathode current required for regulation?
The AP432AWG-7 requires a minimum cathode current of 150 µA to maintain regulation, verified across −20°C to +85°C. Below this, the device exits regulation and VKA rises uncontrollably; design must ensure divider bias or load current meets this threshold under all operating conditions.
Does AP432AWG-7 support operation in high-humidity or automotive environments?
AP432AWG-7 is qualified for extended commercial temperature (−20°C to +85°C) and packaged in moisture-resistant SC59 with lead-free, halogen-free "Green" molding compound. While not AEC-Q200 qualified, its robust construction and 150°C max junction temperature support industrial and non-safety-critical automotive auxiliary systems with proper derating.
AP432AWG-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-59-3
AP432AWG-7 FAQ
1.How can I place an order for AP432AWG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP432AWG-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 AP432AWG-7 reliable?
The price and inventory of AP432AWG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP432AWG-7 is usually 5 days.
3.What payment methods are accepted for AP432AWG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP432AWG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP432AWG-7?
AP432AWG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP432AWG-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 AP432AWG-7?
For technical support, including AP432AWG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP432AWG-7 requirements.
6.How does Aetrix verify that AP432AWG-7 is sourced from the original manufacturer or authorized distributors?
All AP432AWG-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 AP432AWG-7 meets industry standards.
7.What is the process for return or replacement of AP432AWG-7?
All AP432AWG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP432AWG-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 AP432AWG-7 part is unused and in its original packaging.
Return procedure for AP432AWG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP432AWG-7 Tags
-
TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
Diodes Incorporated
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LM4040CYM3-2.5-TR
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LM4040CYM3-4.1-TR
Microchip Technology
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LM4040EIM3-2.5/NOPB
Texas Instruments
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AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
Texas Instruments
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LM4041DIM3-ADJ/NOPB
Texas Instruments
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LM4040DIM3X-2.5/NOPB
Texas Instruments
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LM4040DIM3-2.5/NOPB
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AZ431LANTR-G1
Diodes Incorporated
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