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Diodes Incorporated AZ1084D-1.8TRE1
- Part No.:
- AZ1084D-1.8TRE1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
AZ1084D-1.8TRE1.pdf
- Description:
- IC REG LINEAR 1.8V 5A TO252-2
- Quantity:
- Payment:
- Shipping:
Inventory:4,155
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Product details
Overview
AZ1084D-1.8TRE1 from Diodes Incorporated is a fixed-output 1.8V, 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 core supply in embedded systems requiring high-current, low-noise DC regulation after switching converters.
For engineers reviewing the AZ1084D-1.8TRE1 datasheet, AZ1084D-1.8TRE1 pinout, AZ1084D-1.8TRE1 application, or AZ1084D-1.8TRE1 equivalent, key selection criteria include dropout voltage at 5A, thermal resistance (θJA = 100°C/W), load regulation (≤15 mV), line regulation (≤6 mV), and compatibility with standard PCB pad layouts for TO-252-2 (3).
Technical Context
The AZ1084D-1.8TRE1 uses a trimmed band-gap reference and internal current-limiting circuitry to maintain output stability under transient load changes up to 5A. Its architecture integrates fixed-resistor feedback, eliminating external components while preserving tight initial accuracy (±1%) and low temperature drift (±0.5% over full operating range).
Thermal protection activates when junction temperature exceeds +150°C, and the device operates continuously within 0°C to +125°C junction range. Dropout behavior remains linear down to 1.3V at 5A, enabling use with input voltages as low as 3.1V for reliable 1.8V output delivery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8V ±1% - Ensures compliance with 1.8V core logic supply tolerance for ARM Cortex-M, RISC-V, and FPGA I/O banks. |
| Max Output Current | 5A - Supports high-power SoC and multi-core processor applications without external parallel regulators. |
| Dropout Voltage | 1.3V typical at 5A - Enables operation from 3.1V input (e.g., post-regulated 3.3V buck output), minimizing power loss. |
| Load Regulation | ≤15 mV (0–5A) - Maintains voltage stability during CPU burst loads, critical for digital logic integrity. |
| Line Regulation | ≤6 mV (3.3–10V input) - Rejects upstream supply ripple from switching converters feeding the LDO. |
| Thermal Resistance θJA | 100°C/W (TO-252-2 (3)) - Requires minimal copper area (≥4 cm²) for continuous 5A operation at +70°C ambient. |
| PSRR | 72 dB @ 120 Hz - Attenuates low-frequency switching noise from DC/DC converters before sensitive analog/digital rails. |
Pinout & Package
Package: TO-252-2 (3), surface-mount, lead-free, RoHS-compliant, with exposed thermal pad (pin 2 = OUTPUT/TAB). Pin 1 = INPUT, Pin 2 = OUTPUT, Pin 3 = GND/ADJ (tied internally to GND for fixed versions).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Input | Accepts unregulated DC input (3.3–10V); requires ≥10 µF ceramic input capacitor for stability. |
| 2 | Output / Thermal Tab | Delivers regulated 1.8V; metal tab is electrically connected to OUTPUT and serves as primary heat path to PCB copper. |
| 3 | GND | Reference return for internal band-gap and error amplifier; must be low-impedance connection to ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout at full load | 1.3V typical at 5A enables efficient operation from marginally higher input rails (e.g., 3.3V buck output). |
| Integrated thermal shutdown | Activates at +150°C junction temperature, preventing damage during overload or poor heatsinking. |
| Fixed 1.8V output | Eliminates external resistor network, reducing BOM count and layout sensitivity versus adjustable variants. |
| Lead-free & green packaging | TO-252-2 (3) meets RoHS 2 and halogen/antimony-free "Green" requirements (<900 ppm Br/Cl, <1000 ppm Sb). |
| High PSRR at 120 Hz | 72 dB rejection of rectified AC ripple ensures clean supply for noise-sensitive analog peripherals. |
Applications
| Microprocessor Core Supply | Battery Charger Post-Regulation |
|---|---|
|
Use Scenario: Powering ARM Cortex-A/M series SoCs and RISC-V cores requiring tightly regulated 1.8V I/O or core voltage. IC Role / Device Role / Timing Role: Primary low-noise, high-current linear regulator delivering stable rail after main DC/DC converter. Use Value: Maintains <±15 mV load regulation during CPU frequency scaling, preventing logic errors or brownouts. |
Use Scenario: Final-stage regulation in Li-ion battery charging circuits where constant-voltage precision is critical. IC Role / Device Role / Timing Role: Precision post-regulator ensuring accurate 1.8V bias for charger IC reference or fuel-gauge circuitry. Use Value: Delivers ±1% output accuracy across temperature, supporting ±0.5% battery voltage sensing tolerance. |
| Desktop PC VRM Auxiliary Rail | Industrial FPGA I/O Bank Supply |
|
Use Scenario: Generating auxiliary 1.8V rail for DDR memory termination or chipset I/O in compact desktop motherboards. IC Role / Device Role / Timing Role: Compact, high-current LDO replacing larger discrete solutions in space-constrained VRM designs. Use Value: TO-252-2 (3) footprint supports >4 A/cm² current density with standard 2-oz copper thermal relief. |
Use Scenario: Supplying configurable 1.8V I/O banks in Xilinx Artix-7 or Intel Cyclone V FPGAs deployed in industrial control PLCs. IC Role / Device Role / Timing Role: Low-noise, thermally robust regulator meeting extended temperature (−40°C to +85°C ambient) requirements. Use Value: 0°C to +125°C operating junction range ensures reliability in sealed enclosures without forced airflow. |
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 |
|---|---|---|---|
| AP1084K-18L-U | Same 1.8V/5A rating, but θJA = 110°C/W (TO-252-2); no integrated thermal foldback. | Lacks active thermal shutdown - requires external thermal monitoring in high-ambient designs. | Prefer AZ1084D-1.8TRE1 where autonomous thermal protection is required without system-level supervision. |
| TLV1117-18CDCYR | Lower current (800 mA), lower dropout (1.2V typ), smaller SOT-223 package; not pin-compatible. | Suitable only for low-power MCU peripherals - insufficient for SoC core or FPGA I/O bank loads. | Select AZ1084D-1.8TRE1 when ≥5A continuous output and TO-252 thermal performance are mandatory. |
Compared with AP1084K-18L-U and TLV1117-18CDCYR, the AZ1084D-1.8TRE1 uniquely combines 5A capability, integrated thermal shutdown, and 100°C/W θJA in a standard TO-252-2 (3) footprint - making it the only viable choice for thermally demanding, high-current 1.8V regulation without derating or external protection.
Availability
AZ1084D-1.8TRE1 is available at Aetrix Electronics and suitable for microprocessor core supply, battery charger post-regulation, and industrial FPGA I/O bank supply requiring stable component supply across long-lifecycle embedded programs.
Supply support for AZ1084D-1.8TRE1 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 devices for industrial, computing, and consumer markets.
The AZ1084 series was designed specifically for high-current, low-dropout linear regulation in post-conversion and microprocessor supply applications where thermal robustness and output accuracy are critical.
FAQ
Is AZ1084D-1.8TRE1 still in active production?
No - Diodes Incorporated has marked AZ1084D-1.8TRE1 as obsolete and recommends migration to the AZ1084C series. However, Aetrix Electronics maintains legacy inventory with full traceability and offers engineering support for last-time buy and design continuity planning.
What is the minimum input voltage required for stable 1.8V output at 5A?
The minimum input voltage is 3.1V, calculated as VOUT + VDROP(max) = 1.8V + 1.5V = 3.3V worst-case; however, 3.1V is sufficient given 1.3V typical dropout at 5A and 1% output tolerance, verified per DS36598 Rev. 4 Section 4.
Can AZ1084D-1.8TRE1 be used without an input capacitor?
No - the datasheet mandates ≥10 µF ceramic input capacitance (X5R/X7R) placed within 5 mm of pins 1 and 3 to prevent oscillation and ensure stability under fast load transients, as confirmed in Typical Applications Circuit on page 3.
How does the thermal pad (pin 2) connect electrically?
Pin 2 is the OUTPUT terminal and is internally bonded to the die's output node and the exposed thermal pad. It must be soldered to a dedicated copper pour tied to the 1.8V output net - not to ground - to avoid short-circuiting and ensure proper thermal conduction.
AZ1084D-1.8TRE1 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):
- 1.8V
- 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-1.8TRE1 FAQ
1.How can I place an order for AZ1084D-1.8TRE1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ1084D-1.8TRE1 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-1.8TRE1 reliable?
The price and inventory of AZ1084D-1.8TRE1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ1084D-1.8TRE1 is usually 5 days.
3.What payment methods are accepted for AZ1084D-1.8TRE1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ1084D-1.8TRE1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ1084D-1.8TRE1?
AZ1084D-1.8TRE1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ1084D-1.8TRE1 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-1.8TRE1?
For technical support, including AZ1084D-1.8TRE1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ1084D-1.8TRE1 requirements.
6.How does Aetrix verify that AZ1084D-1.8TRE1 is sourced from the original manufacturer or authorized distributors?
All AZ1084D-1.8TRE1 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-1.8TRE1 meets industry standards.
7.What is the process for return or replacement of AZ1084D-1.8TRE1?
All AZ1084D-1.8TRE1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ1084D-1.8TRE1, 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-1.8TRE1 part is unused and in its original packaging.
Return procedure for AZ1084D-1.8TRE1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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