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Diodes Incorporated AZ1084S2-ADJTRE1
- Part No.:
- AZ1084S2-ADJTRE1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
AZ1084S2-ADJTRE1.pdf
- Description:
- IC REG LINEAR POS ADJ 5A TO263
- Quantity:
- Payment:
- Shipping:
Inventory:2,787
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Product details
Overview
AZ1084S2-ADJTRE1 from Diodes Incorporated is an adjustable 5A low-dropout linear regulator in TO-263-2 package, delivering stable output voltage with 1.3V typical dropout at full load, ±1% output voltage accuracy over temperature, and integrated thermal shutdown and current limiting. It serves as a post-regulator for switching supplies and microprocessor core supply in embedded systems requiring high-current, low-noise DC power.
For engineers reviewing the AZ1084S2-ADJTRE1 datasheet, AZ1084S2-ADJTRE1 pinout, AZ1084S2-ADJTRE1 application, or AZ1084S2-ADJTRE1 equivalent, this page provides verified technical context, real-world application mappings, validated alternative parts, and supply-chain support details specific to the TO-263-2 adjustable variant.
Technical Context
The AZ1084S2-ADJTRE1 implements a band-gap referenced error amplifier driving a PNP pass transistor, enabling precise output regulation via external R1/R2 feedback network. Its architecture supports adjustable output from 1.25V to 10V with 1.225V reference voltage and 55–120µA adjust pin current.
Thermal protection activates when junction temperature exceeds +150°C, and current limiting engages at 5.5–6.5A under 3V headroom. The device operates across 0°C to +125°C junction range with 0.1% typical load regulation and 0.015% typical line regulation - critical for stable microprocessor rail generation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 5A continuous - supports high-power SoC and FPGA core rails without derating at moderate ambient temperatures. |
| Dropout Voltage | 1.3V typical at 5A - enables operation with minimal input–output differential, reducing power loss and heat generation. |
| Reference Voltage | 1.225V (min) to 1.270V (max) - sets precision of externally adjusted output; determines absolute accuracy of final VOUT. |
| Line Regulation | 0.015% typical - ensures <±0.375mV change in VOUT per 1V VIN variation, critical for noise-sensitive analog subsystems. |
| Load Regulation | 0.1% typical - guarantees ≤±2.5mV shift in VOUT from no-load to full 5A, maintaining tight tolerance under dynamic load steps. |
| Thermal Shutdown | Activates at TJ ≥ +150°C - protects die during overload or inadequate heatsinking; auto-recovery on cooldown. |
| Current Limit | 6.5A typical - prevents catastrophic failure during short-circuit or startup inrush into large capacitive loads. |
Pinout & Package
Package: TO-263-2 (D²PAK-2), surface-mount, thermally enhanced with exposed tab connected to OUTPUT pin. Pin 1 = INPUT, Pin 2 = OUTPUT (tab), Pin 3 = ADJ/GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | INPUT | Unregulated positive input supply; must be ≥ (VOUT + VDROP) and include ≥10µF low-ESR ceramic or tantalum bypass capacitance. |
| Pin 2 | OUTPUT | Regulated output node and thermal pad connection; requires direct PCB copper pour for thermal management and low-impedance return path. |
| Pin 3 | ADJ/GND | Feedback reference node; connects to voltage divider (R1–R2) between VOUT and GND; sinks 55–120µA for regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Low Dropout | 1.3V at 5A enables use with 3.3V or 5V intermediate rails to generate sub-3V processor cores efficiently. |
| Integrated Protection | Thermal shutdown + current limiting eliminates need for external fault-handling circuitry in compact designs. |
| Adjustable Output | VOUT = 1.25V × (1 + R2/R1) + IADJ×R2 - supports custom voltages from 1.25V to 10V with standard resistor values. |
| Lead-Free & Green | RoHS-compliant, halogen- and antimony-free package meets IPC-1752A environmental requirements for industrial and telecom equipment. |
| Stable with Ceramic Caps | Designed for ≥10µF output capacitance with ESR < 100mΩ - compatible with low-cost, high-reliability MLCCs. |
Applications
| Battery Charger Post-Regulation | Microprocessor Core Supply |
|---|---|
Use Scenario: Final-stage regulation after buck converter in Li-ion battery charging system, where ripple rejection and precise voltage control prevent overcharge. IC Role / Device Role / Timing Role: Low-noise linear post-regulator providing clean 3.3V or adjustable core voltage to charge-management IC and battery protection circuitry. Use Value: PSRR of 72dB at 120Hz suppresses switching ripple from upstream DC/DC, ensuring accurate battery voltage sensing and safe termination. |
Use Scenario: Primary core voltage supply for ARM Cortex-A series or RISC-V SoCs operating at 1.0–1.2V with dynamic current up to 5A. IC Role / Device Role / Timing Role: Adjustable LDO delivering tightly regulated VDD_CORE with fast transient response to CPU load changes. Use Value: 0.1% load regulation and 100µs transient recovery time maintain voltage within ±25mV window during 1A–5A load steps, preventing CPU throttling or reset. |
| Desktop PC VRM Auxiliary Rail | Industrial PLC I/O Power |
Use Scenario: Generating +2.5V or +1.8V auxiliary rail for DDR memory termination or PCIe slot logic in desktop motherboard VRM design. IC Role / Device Role / Timing Role: Secondary LDO supplying low-noise, low-ripple bias to memory interface circuits adjacent to high-speed digital traces. Use Value: RMS output noise of 0.003% of VOUT minimizes jitter in clock distribution networks and improves signal integrity margin. |
Use Scenario: Powering isolated analog front-end (AFE) and digital I/O modules in programmable logic controller backplane with wide ambient temperature swing. IC Role / Device Role / Timing Role: High-current, wide-temperature-range LDO delivering stable 5.0V or 3.3V to sensor conditioning and optocoupler driver stages. Use Value: Guaranteed operation from 0°C to +125°C junction temperature and ±0.5% long-term stability over 1000 hours ensure reliability in uncooled industrial enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable 5A LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1963AEST-ADJ#TRPBF | Lower dropout (340mV @ 1.5A), lower IQ (1mA), but rated only to 1.5A output current. | Suitable for low-power embedded controllers; insufficient for 5A microprocessor core rails. | Select only if load current ≤1.5A and ultra-low IQ is prioritized over current capability. |
| TPS75733KTTR | Fixed 3.3V output, 3A rating, 1.15V dropout @ 3A, no adjustable option. | Cannot replace adjustable function; limited to fixed-voltage use cases like peripheral I/O rails. | Use only when 3.3V fixed output and ≤3A load are acceptable; not a functional substitute for AZ1084S2-ADJTRE1. |
Compared with LT1963AEST-ADJ#TRPBF and TPS75733KTTR, the AZ1084S2-ADJTRE1 uniquely delivers 5A adjustable regulation in TO-263-2 with proven thermal robustness in high-power industrial environments - making it irreplaceable for full-core SoC supply where both current and configurability are mandatory.
Availability
AZ1084S2-ADJTRE1 is available at Aetrix Electronics and suitable for battery chargers, microprocessor core supplies, and industrial PLC I/O power systems requiring stable component supply with full traceability and long-lifecycle support.
Supply support for AZ1084S2-ADJTRE1 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 power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
The AZ1084 series belongs to Diodes' high-current LDO product line, engineered specifically for post-regulation and core voltage supply in space-constrained, thermally demanding applications where reliability and precision outweigh switching efficiency trade-offs.
FAQ
What is the minimum required input-to-output voltage difference for stable operation?
The AZ1084S2-ADJTRE1 requires a minimum headroom of 1.3V (typical) at 5A load to maintain regulation; absolute minimum is 1.5V under worst-case conditions. Below this, output voltage drops linearly with input, and thermal shutdown may activate due to excessive power dissipation in the pass element.
Can this part be used with ceramic output capacitors?
Yes - the AZ1084S2-ADJTRE1 is stable with ceramic output capacitors ≥10µF and ESR < 100mΩ. No series resistance is needed, unlike older LDOs; this simplifies layout and improves transient response while reducing board area and cost.
How does the ADJ pin current affect output voltage accuracy?
IADJ (55–120µA) flows through R2 in the feedback divider, introducing a systematic offset: VOUT = VREF × (1 + R2/R1) + IADJ × R2. For 1% accuracy, R2 should be ≤10kΩ; higher values increase error proportionally and reduce noise immunity.
Is the TO-263-2 package thermally adequate for 5A continuous operation?
Yes - with a 4-layer PCB using ≥4 cm² copper pour connected to the exposed tab (Pin 2), θJA is ~60°C/W. At 25°C ambient and 5A load with 3V dropout, power dissipation is 15W, resulting in ~115°C junction rise - within the 0–125°C operating range. Forced airflow or heatsink further extends margin.
AZ1084S2-ADJTRE1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 12V
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- 10.5V
- Voltage Dropout (Max):
- 1.5V @ 5A
- Current - Output:
- 5A
- Current - Quiescent (Iq):
- 10 mA
- Current - Supply (Max):
- -
- PSRR:
- 72dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- 0°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263
AZ1084S2-ADJTRE1 FAQ
1.How can I place an order for AZ1084S2-ADJTRE1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ1084S2-ADJTRE1 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 AZ1084S2-ADJTRE1 reliable?
The price and inventory of AZ1084S2-ADJTRE1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ1084S2-ADJTRE1 is usually 5 days.
3.What payment methods are accepted for AZ1084S2-ADJTRE1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ1084S2-ADJTRE1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ1084S2-ADJTRE1?
AZ1084S2-ADJTRE1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ1084S2-ADJTRE1 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 AZ1084S2-ADJTRE1?
For technical support, including AZ1084S2-ADJTRE1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ1084S2-ADJTRE1 requirements.
6.How does Aetrix verify that AZ1084S2-ADJTRE1 is sourced from the original manufacturer or authorized distributors?
All AZ1084S2-ADJTRE1 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 AZ1084S2-ADJTRE1 meets industry standards.
7.What is the process for return or replacement of AZ1084S2-ADJTRE1?
All AZ1084S2-ADJTRE1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ1084S2-ADJTRE1, 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 AZ1084S2-ADJTRE1 part is unused and in its original packaging.
Return procedure for AZ1084S2-ADJTRE1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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