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Diodes Incorporated AZ1084S-3.3TRE1
- Part No.:
- AZ1084S-3.3TRE1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-263-4, D2PAK (3 Leads + Tab), TO-263AA
- Datasheet:
-
AZ1084S-3.3TRE1.pdf
- Description:
- IC REG LINEAR 3.3V 5A TO263
- Quantity:
- Payment:
- Shipping:
Inventory:4,049
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Product details
Overview
AZ1084S-3.3TRE1 from Diodes Incorporated is a fixed-output 3.3V, 5A low dropout linear regulator in TO-263 (D²PAK) package, featuring 1.3V typical dropout at full load, on-chip thermal limiting, and ±1% output voltage accuracy over 0°C to +125°C. It delivers stable microprocessor supply for embedded systems requiring high-current, low-noise post-regulation after switching converters.
For engineers reviewing the AZ1084S-3.3TRE1 datasheet, AZ1084S-3.3TRE1 pinout, AZ1084S-3.3TRE1 application, or AZ1084S-3.3TRE1 equivalent, key selection criteria include dropout voltage at 5A, thermal resistance (θJA = 60°C/W), load regulation (≤15 mV), line regulation (≤6 mV), and compatibility with standard TO-263 heatsinking layouts.
Technical Context
The AZ1084S-3.3TRE1 uses a trimmed band-gap reference and internal current-limiting circuitry to maintain output stability under transient loads up to 6.5A and junction temperatures up to +125°C. Its architecture integrates fixed-resistor feedback, eliminating external components while preserving tight DC accuracy (±1%) across input ranges from 4.8V to 8V.
Thermal protection activates when die temperature exceeds +150°C, and the device operates within 0°C to +125°C ambient with no minimum load requirement above 3mA. PSRR reaches 72dB at 120Hz with 25µF tantalum output capacitance, supporting noise-sensitive analog and digital rail applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3V ±1% (guaranteed over 10mA–5A load and 4.8V–8V input) |
| Dropout Voltage | 1.3V typical at 5A (enables operation with only 4.6V input for 3.3V output) |
| Output Current | 5A continuous (supports single-rail CPU core or FPGA I/O supply) |
| Current Limit | 6.5A (protects against short-circuit events without latch-up) |
| Thermal Resistance | θJA = 60°C/W (TO-263 package; requires PCB copper area ≥4 cm² for full 5A rating) |
| Load Regulation | ≤15 mV (ΔVOUT from 0–5A; ensures stable voltage under dynamic processor load) |
| Line Regulation | ≤6 mV (ΔVOUT over 4.8–8V input; maintains accuracy despite upstream converter ripple) |
Pinout & Package
Package: TO-263 (D²PAK), surface-mount, thermally enhanced with exposed tab connected to output.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Input) | VIN | Main power input; accepts 4.8V–12V; requires ≥10µF ceramic input capacitor |
| 2 (Output) | VOUT | Regulated 3.3V output; connects to exposed tab; requires ≥22µF low-ESR output capacitor |
| 3 (Tab/GND) | GND | Ground reference; electrically tied to package tab; must be soldered to large PCB copper pour |
Key Features
| Feature | Design Value |
|---|---|
| Low Dropout Operation | 1.3V at 5A enables use with 5V intermediate bus or battery-sourced inputs down to 4.6V |
| Integrated Thermal Protection | Shuts down at +150°C junction temperature and auto-recovers upon cooling |
| Fixed Output Accuracy | ±1% over full load/temperature range eliminates need for external trimming resistors |
| Lead-Free & Green Compliance | RoHS-compliant, halogen- and antimony-free packaging per JEDEC J-STD-020 |
| High Ripple Rejection | 72dB PSRR at 120Hz supports clean power delivery downstream of buck converters |
Applications
| Microprocessor Core Supply | Battery Charger Post-Regulation |
|---|---|
Use Scenario: Powering ARM Cortex-A series SoCs with burst currents up to 4.5A and tight 3.3V tolerance requirements. IC Role / Device Role / Timing Role: Primary 3.3V LDO delivering low-noise, fast-transient response power to CPU VDD_IO rails. Use Value: Maintains <15mV load regulation during 0→5A transients, preventing logic errors or brownouts during instruction fetch bursts. |
Use Scenario: Final-stage regulation after a 5V switching charger IC supplying Li-ion battery management circuits. IC Role / Device Role / Timing Role: Low-dropout post-regulator ensuring stable 3.3V for ADC references and charge-status monitoring ICs. Use Value: 1.3V dropout allows operation with weak or aging 5V sources; thermal shutdown prevents overheating during prolonged charging cycles. |
| Desktop PC I/O Rail | RISC Processor Peripheral Supply |
Use Scenario: Providing isolated 3.3V for PCIe slot auxiliary power or USB controller logic in compact desktop motherboards. IC Role / Device Role / Timing Role: High-current, space-constrained LDO replacing discrete regulator solutions in dense board layouts. Use Value: TO-263 package enables >4W dissipation with minimal heatsink; 60°C/W θJA supports convection-only cooling. |
Use Scenario: Supplying 3.3V to peripherals (UART, SPI, GPIO) on RISC-V evaluation boards with variable load profiles. IC Role / Device Role / Timing Role: Fixed-output LDO decoupling switching noise from sensitive communication interfaces. Use Value: 72dB PSRR at 120Hz suppresses switching artifacts from upstream DC/DC, reducing UART bit errors by >99.9%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP2303WG-7 | 3.3V/3A, 300mV dropout, SOT-23-5 package; lower current, smaller footprint | Not suitable for >3A loads; lacks thermal shutdown flag or adjustable version | Select when board space is critical and peak load ≤3A; verify thermal margin with 100°C/W θJA |
| TLV1117-33CDR | 3.3V/800mA, 1.2V dropout, SO-8 package; lower current, higher dropout at full load | Cannot support 5A; requires parallel devices or heatsink for >1A operation | Choose only for low-power subsystems; avoid for main processor rails due to current limitation |
Compared with AP2303WG-7 and TLV1117-33CDR, AZ1084S-3.3TRE1 uniquely delivers 5A continuous current in TO-263 with 1.3V dropout and integrated thermal protection-making it the sole option among the three for high-current, thermally constrained embedded power rails.
Availability
AZ1084S-3.3TRE1 is available at Aetrix Electronics and suitable for microprocessor supply, battery charger post-regulation, and desktop PC I/O rail applications requiring stable component supply and long-term industrial lifecycle support.
Supply support for AZ1084S-3.3TRE1 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 portfolio, designed specifically for post-regulation in power-dense embedded systems where thermal efficiency and output accuracy under dynamic load are critical.
FAQ
What is the maximum input voltage for AZ1084S-3.3TRE1?
The absolute maximum input voltage is 12V per the datasheet's Recommended Operating Conditions. However, sustained operation above 8V is not recommended due to thermal limitations-power dissipation rises quadratically with VIN–VOUT, and the TO-263 package requires careful thermal design above 6.5V input at full 5A load.
Does AZ1084S-3.3TRE1 require an external capacitor on the ADJ pin?
No-the AZ1084S-3.3TRE1 is a fixed-output variant with internal resistor divider; the third pin is GND, not ADJ. Only the adjustable AZ1084-ADJ versions require external resistors and bypass capacitors on the ADJ pin. This part has no ADJ functionality.
Can AZ1084S-3.3TRE1 be used in parallel for higher current?
No-parallel operation is not supported. The device lacks current-sharing features such as precision output matching or current-balancing pins. Attempting parallel connection risks thermal runaway due to minor VOUT mismatches (<10mV), leading to uneven current distribution and premature failure of one unit.
Is AZ1084S-3.3TRE1 still in active production?
No-Diodes Incorporated has marked AZ1084 as OBSOLETE and recommends AZ1084C as the functional replacement. AZ1084S-3.3TRE1 remains available through Aetrix Electronics for legacy design support and last-time buy programs, with full traceability and documented lifecycle status.
AZ1084S-3.3TRE1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-263-4, D2PAK (3 Leads + Tab), TO-263AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 12V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- 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
AZ1084S-3.3TRE1 FAQ
1.How can I place an order for AZ1084S-3.3TRE1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ1084S-3.3TRE1 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 AZ1084S-3.3TRE1 reliable?
The price and inventory of AZ1084S-3.3TRE1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ1084S-3.3TRE1 is usually 5 days.
3.What payment methods are accepted for AZ1084S-3.3TRE1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ1084S-3.3TRE1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ1084S-3.3TRE1?
AZ1084S-3.3TRE1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ1084S-3.3TRE1 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 AZ1084S-3.3TRE1?
For technical support, including AZ1084S-3.3TRE1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ1084S-3.3TRE1 requirements.
6.How does Aetrix verify that AZ1084S-3.3TRE1 is sourced from the original manufacturer or authorized distributors?
All AZ1084S-3.3TRE1 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 AZ1084S-3.3TRE1 meets industry standards.
7.What is the process for return or replacement of AZ1084S-3.3TRE1?
All AZ1084S-3.3TRE1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ1084S-3.3TRE1, 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 AZ1084S-3.3TRE1 part is unused and in its original packaging.
Return procedure for AZ1084S-3.3TRE1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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