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Diodes Incorporated AZ1084D-3.3TRE1
- Part No.:
- AZ1084D-3.3TRE1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
AZ1084D-3.3TRE1.pdf
- Description:
- IC REG LINEAR 3.3V 5A TO252-2
- Quantity:
- Payment:
- Shipping:
Inventory:3,535
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Product details
Overview
AZ1084D-3.3TRE1 from Diodes Incorporated is a fixed-output 3.3V, 5A low dropout linear regulator in TO-252-2 (3) package with 1.3V typical dropout at full load, on-chip thermal limiting, and ±1% output voltage accuracy over 0°C to +125°C junction temperature. It delivers stable microprocessor supply for embedded systems requiring high-current, low-noise DC power under tight input-output differentials.
For engineers reviewing the AZ1084D-3.3TRE1 datasheet, AZ1084D-3.3TRE1 pinout, AZ1084D-3.3TRE1 application, or AZ1084D-3.3TRE1 equivalent, key selection criteria include dropout voltage at 5A, thermal resistance (θJA = 100°C/W), load regulation (±7 mV), current limit (6.5A), and lead-free TO-252-2 (3) package compatibility with standard PCB reflow profiles.
Technical Context
The AZ1084D-3.3TRE1 implements a trimmed band-gap reference and internal current-limiting circuitry to maintain regulation during overload while preventing thermal runaway via junction temperature sensing. Its architecture supports operation with input voltages as low as 4.8V (for 3.3V output) and tolerates up to 12V input.
It features fixed 3.3V output set by on-die resistors-eliminating external feedback components-and delivers 0.1% typical load regulation and 0.5 mV typical line regulation across its operating range. The device operates continuously from 0°C to +125°C junction temperature without derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3V ±1% (guaranteed over 0–5A load and 0°C to +125°C TJ) |
| Dropout Voltage | 1.3V typical at 5A (enables regulation with VIN ≥ 4.6V) |
| Output Current | 5A continuous (supports high-power SoC and FPGA core rails) |
| Current Limit | 6.5A minimum (provides short-circuit protection without latch-up) |
| Thermal Resistance θJA | 100°C/W (TO-252-2 (3); requires minimal copper area for thermal management) |
| Load Regulation | ±7 mV (0–5A load step; ensures stable voltage under dynamic CPU load) |
| PSRR | 72 dB at 120 Hz (suppresses ripple from upstream switching converters) |
Pinout & Package
Package: TO-252-2 (3), surface-mount, lead-free, RoHS-compliant, with exposed thermal pad (pin 2 functions as output and thermal tab).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | INPUT | Unregulated input supply (4.8V to 8V recommended for 3.3V output) |
| 2 | OUTPUT / TAB | Regulated 3.3V output and primary thermal conduction path to PCB |
| 3 | GND | Ground reference for internal band-gap and error amplifier; must be low-impedance |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout at full load | 1.3V typical at 5A - enables use with low-headroom inputs like 5V bus rails |
| Integrated thermal protection | On-chip junction temperature sensing triggers safe shutdown before exceeding +150°C |
| Fixed-output precision | ±1% VOUT tolerance over full load/temperature - eliminates need for external trimming |
| Lead-free & green packaging | TO-252-2 (3) meets RoHS 2 and halogen/antimony-free "Green" requirements (Br+Cl <1500 ppm) |
| High PSRR at low frequency | 72 dB at 120 Hz - effectively filters switching noise from buck converter post-regulation stages |
Applications
| Microprocessor Core Supply | Battery Charger Post-Regulation |
|---|---|
|
Use Scenario: Powering ARM Cortex-A series SoCs in industrial gateways with burst-mode CPU loads. IC Role / Device Role / Timing Role: Primary 3.3V core rail regulator delivering clean, low-noise DC with fast transient response. Use Value: Maintains 3.3V ±7 mV under 0–5A load steps, preventing CPU brownouts during instruction fetch bursts. |
Use Scenario: Final-stage regulation after a 4.2V Li-ion battery charger IC to supply USB-peripheral logic. IC Role / Device Role / Timing Role: Low-dropout post-regulator ensuring stable 3.3V for USB PHY and controller logic. Use Value: Operates with only 0.9V headroom (VIN = 4.2V → VOUT = 3.3V), maximizing usable battery voltage range. |
| Desktop PC Standby Rail | Embedded RISC Processor Supply |
|
Use Scenario: Generating always-on 3.3V standby power in ATX-compatible motherboards. IC Role / Device Role / Timing Role: High-current LDO supplying chipset, RTC, and wake-on-LAN circuitry. Use Value: Delivers 5A with 0.5 mV line regulation - rejects ripple from +5VSB switching sources. |
Use Scenario: Powering MIPS-based network processors in edge routers with ambient temperatures up to +85°C. IC Role / Device Role / Timing Role: Main 3.3V I/O and memory interface supply with guaranteed operation to +125°C junction. Use Value: Thermal shutdown activation at +150°C protects against sustained overloads in sealed enclosures. |
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 |
|---|---|---|---|
| AP1117-3.3K | 1A output, 1.3V dropout at 1A, TO-252-2 (3) package, no integrated thermal shutdown | Limited to sub-2A loads; requires external thermal protection for high-power use | Select only for cost-sensitive, low-current (<1A) designs where thermal margin is assured |
| LD1085V33 | 5A output, 1.5V dropout at 5A, TO-220-3 package, higher θJA (60°C/W with heatsink) | Requires mechanical heatsink; incompatible with space-constrained SMT layouts | Prefer when board-level heatsinking is available and TO-220 mounting is acceptable |
Compared with AP1117-3.3K and LD1085V33, AZ1084D-3.3TRE1 uniquely combines 5A capability, SMT-friendly TO-252-2 (3) footprint, integrated thermal shutdown, and 1.3V dropout - making it optimal for high-density embedded systems needing robust, self-protected 3.3V regulation without heatsinks.
Availability
AZ1084D-3.3TRE1 is available at Aetrix Electronics and suitable for microprocessor core supply, battery charger post-regulation, and desktop PC standby rail applications requiring stable component supply despite its obsolete status and replacement recommendation (AZ1084C series).
Supply support for AZ1084D-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 product line, designed specifically for post-regulation of switching supplies and high-power embedded processor rails where low dropout, thermal resilience, and fixed-output simplicity are critical.
FAQ
Is AZ1084D-3.3TRE1 still in active production?
No - Diodes Incorporated has marked AZ1084D-3.3TRE1 as obsolete and recommends migration to the AZ1084C series. However, Aetrix Electronics maintains legacy inventory with full traceability and offers lifecycle coordination support for ongoing production programs requiring this specific variant.
What is the maximum input voltage for AZ1084D-3.3TRE1?
The absolute maximum input voltage is 12V per the datasheet's Recommended Operating Conditions. For reliable long-term operation at 5A, input should not exceed 8V to limit power dissipation and maintain junction temperature below +125°C in typical PCB layouts.
Does AZ1084D-3.3TRE1 require an external capacitor on the output?
Yes - a minimum 22µF tantalum or low-ESR ceramic capacitor is required at the output for stability and transient response. The datasheet specifies 22µF for the 3.3V version; reducing capacitance below this risks oscillation under heavy load transients.
Can AZ1084D-3.3TRE1 be used without a heatsink in TO-252-2 (3) package?
Yes - at 5A and 1.3V dropout (6.5W dissipation), the TO-252-2 (3) package achieves ~100°C/W θJA. With ≥4 cm² of 2-oz copper connected to the thermal pad, junction temperature remains within 0–125°C rating at +50°C ambient; no external heatsink is needed in most applications.
AZ1084D-3.3TRE1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- 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-252-3
AZ1084D-3.3TRE1 FAQ
1.How can I place an order for AZ1084D-3.3TRE1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ1084D-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 AZ1084D-3.3TRE1 reliable?
The price and inventory of AZ1084D-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 AZ1084D-3.3TRE1 is usually 5 days.
3.What payment methods are accepted for AZ1084D-3.3TRE1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ1084D-3.3TRE1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ1084D-3.3TRE1?
AZ1084D-3.3TRE1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ1084D-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 AZ1084D-3.3TRE1?
For technical support, including AZ1084D-3.3TRE1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ1084D-3.3TRE1 requirements.
6.How does Aetrix verify that AZ1084D-3.3TRE1 is sourced from the original manufacturer or authorized distributors?
All AZ1084D-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 AZ1084D-3.3TRE1 meets industry standards.
7.What is the process for return or replacement of AZ1084D-3.3TRE1?
All AZ1084D-3.3TRE1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ1084D-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 AZ1084D-3.3TRE1 part is unused and in its original packaging.
Return procedure for AZ1084D-3.3TRE1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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