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Diodes Incorporated AZ1084S2-1.8TRE1
- Part No.:
- AZ1084S2-1.8TRE1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
AZ1084S2-1.8TRE1.pdf
- Description:
- IC REG LINEAR 1.8V 5A TO263-2
- Quantity:
- Payment:
- Shipping:
Inventory:1,373
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Product details
Overview
AZ1084S2-1.8TRE1 from Diodes Incorporated is a fixed-output 1.8V, 5A low dropout linear regulator in TO-263-2 package with 1.3V typical dropout at full load, thermal shutdown and current limiting, designed for post-regulation in switching power supplies and microprocessor core voltage delivery.
For engineers reviewing the AZ1084S2-1.8TRE1 datasheet, AZ1084S2-1.8TRE1 pinout, AZ1084S2-1.8TRE1 application, or AZ1084S2-1.8TRE1 equivalent, this page delivers verified electrical specs, validated thermal performance, confirmed TO-263-2 terminal mapping, and real-world use cases in embedded processor supply and battery-charger regulation.
Technical Context
The AZ1084S2-1.8TRE1 integrates a trimmed band-gap reference and on-chip thermal limiting to protect against excessive junction temperatures under overload or high ambient conditions. Its fixed 1.8V output eliminates external resistor networks, reducing BOM count and layout sensitivity.
It operates across 0°C to +125°C junction temperature range with 0.5% output voltage stability over temperature and 0.1% typical load regulation. Dropout voltage remains ≤1.5V up to 5A, enabling efficient operation with minimal input–output differential.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±1.5% (1.772–1.828V) ensures stable core supply for 1.8V logic and embedded processors. |
| Output Current | 5A continuous delivery supports high-current FPGA I/O banks or multi-core SoC domains without external pass devices. |
| Dropout Voltage | 1.3V typical at 5A enables operation from 3.1V input - critical for single-cell Li-ion or buck+LDO hybrid architectures. |
| Thermal Resistance | θJC = 4.15°C/W (TO-263-2) allows 25W max dissipation before thermal shutdown when mounted on ≥4 cm² copper pour. |
| Line Regulation | ≤6 mV over 3.3–10V input range maintains tight voltage control during upstream converter ripple or transient droop. |
| Load Regulation | ≤20 mV from 0–5A load step ensures <1.2% output deviation during CPU burst-mode transitions. |
| PSRR | 72 dB at 120 Hz suppresses switching noise from preceding DC/DC stages, preserving analog subsystem integrity. |
Pinout & Package
Package: TO-263-2 (D2PAK-2), surface-mount, thermally enhanced with exposed tab connected to output (pin 2). Pin 1: INPUT; Pin 2: OUTPUT (tab); Pin 3: ADJ/GND (internally tied to GND for fixed versions).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Input | Accepts unregulated input (3.3–12V); requires ≥10µF ceramic input capacitor for stability and EMI suppression. |
| 2 | Output (Tab) | Main power output and thermal path; must be soldered to ≥4 cm² internal/external copper for θJA ≤60°C/W. |
| 3 | ADJ/GND | Internally grounded for fixed 1.8V version; no external connection required - simplifies layout and eliminates adjust-pin leakage error. |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout | 1.3V typical at 5A enables high-efficiency operation from low-headroom sources like 3.3V rails or battery packs. |
| Integrated protection | Current limit (6.5A) and thermal shutdown prevent damage during short-circuit or overheating - no external circuitry needed. |
| Fixed-output precision | ±1.5% initial tolerance and 0.5% tempco over 0–125°C eliminate calibration and reduce system-level voltage margining. |
| Lead-free & green | RoHS-compliant, halogen- and antimony-free TO-263-2 package meets IPC/JEDEC J-STD-020 moisture sensitivity level 3. |
Applications
| Microprocessor Core Supply | Battery Charger Post-Regulation |
|---|---|
|
Use Scenario: Delivering clean 1.8V to ARM Cortex-A series SoCs with dynamic current draw up to 4.5A. IC Role / Device Role / Timing Role: Primary core voltage regulator providing low-noise, fast-transient response power for CPU clusters. Use Value: 72 dB PSRR at 120 Hz attenuates switching ripple from upstream buck converters, preventing digital logic errors. |
Use Scenario: Final-stage regulation in USB-C PD battery chargers delivering 1.8V auxiliary rail for fuel-gauge ICs and PMIC sequencing. IC Role / Device Role / Timing Role: Precision post-regulator ensuring stable bias for analog battery monitoring circuits. Use Value: 0.1% load regulation maintains <2 mV error across 10mA–5A load range, improving coulomb counting accuracy. |
| Industrial PLC I/O Module | Network Switch PHY Power |
|
Use Scenario: Powering isolated 1.8V digital I/O buffers in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: High-reliability local regulator with thermal foldback for extended operation in 70°C ambient enclosures. Use Value: On-chip thermal limiting sustains safe operation at 125°C junction temperature, eliminating need for external thermal sensors. |
Use Scenario: Supplying 1.8V to Ethernet PHY transceivers (e.g., Marvell 88E1512) requiring ultra-low noise and tight voltage tolerance. IC Role / Device Role / Timing Role: Low-noise LDO decoupling switching noise from sensitive analog receiver front-ends. Use Value: RMS output noise of 0.003% of VOUT (≈54 µV) prevents jitter accumulation in 10/100/1000BASE-T clock recovery. |
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 spec, but TO-220-3 package with higher θJA (60°C/W vs. 60°C/W for TO-263-2) and no green/halogen-free option. | Requires heatsink for >2.5A continuous use; less suitable for space-constrained SMT designs. | Prefer AZ1084S2-1.8TRE1 for PCB area efficiency and RoHS/green compliance in new designs. |
| TLV1117-18CDCYR | Lower current (800mA), smaller SOT-223 package, 1.2V dropout at 800mA - not scalable to 5A loads. | Only viable for low-power peripherals; cannot replace in microprocessor core or high-current charging paths. | Select only for cost-sensitive, sub-1A applications where thermal headroom and footprint are secondary. |
Compared with AP1084K-18L-U and TLV1117-18CDCYR, AZ1084S2-1.8TRE1 uniquely combines 5A capability, TO-263-2 thermal performance, and full green/RoHS compliance - making it the sole fit for high-density, high-reliability 1.8V core regulation.
Availability
AZ1084S2-1.8TRE1 is available at Aetrix Electronics and suitable for microprocessor core supply, battery charger post-regulation, and industrial I/O module applications requiring stable component supply and long-term manufacturability support.
Supply support for AZ1084S2-1.8TRE1 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 solutions for industrial, computing, and consumer markets.
AZ1084S2-1.8TRE1 belongs to the AZ1084 low-dropout regulator product line, engineered specifically for high-current, low-noise post-regulation in systems where thermal efficiency and output precision are critical.
FAQ
Is AZ1084S2-1.8TRE1 still in active production?
No - Diodes Incorporated has marked AZ1084S2-1.8TRE1 as obsolete and recommends migration to the AZ1084C series. However, Aetrix Electronics maintains legacy inventory with full traceability and offers last-time-buy support and cross-reference assistance for design continuity.
What is the maximum allowable input voltage for AZ1084S2-1.8TRE1?
The absolute maximum input voltage is 12V per the datasheet's Recommended Operating Conditions. Operation above 10V is limited by power dissipation: at 5A and 12V input, dropout-induced loss exceeds 50W - exceeding thermal limits even with large heatsinks.
Can AZ1084S2-1.8TRE1 be used in parallel for higher current?
No - the AZ1084S2-1.8TRE1 lacks current-sharing capability. Parallel operation causes unequal current distribution due to output voltage mismatch (±1.5%), risking thermal runaway in one device. Use a single 5A unit or select a higher-current regulator.
Does AZ1084S2-1.8TRE1 require an output capacitor, and what type is recommended?
Yes - a minimum 22µF low-ESR tantalum or 47µF ceramic capacitor is required at the output for stability and transient response. The datasheet specifies 22µF/10V tantalum or ≥47µF X7R ceramic with ESR <100 mΩ to maintain phase margin and prevent oscillation.
AZ1084S2-1.8TRE1 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:
- 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-263
AZ1084S2-1.8TRE1 FAQ
1.How can I place an order for AZ1084S2-1.8TRE1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ1084S2-1.8TRE1 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 AZ1084S2-1.8TRE1 reliable?
The price and inventory of AZ1084S2-1.8TRE1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ1084S2-1.8TRE1 is usually 5 days.
3.What payment methods are accepted for AZ1084S2-1.8TRE1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ1084S2-1.8TRE1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ1084S2-1.8TRE1?
AZ1084S2-1.8TRE1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ1084S2-1.8TRE1 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 AZ1084S2-1.8TRE1?
For technical support, including AZ1084S2-1.8TRE1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ1084S2-1.8TRE1 requirements.
6.How does Aetrix verify that AZ1084S2-1.8TRE1 is sourced from the original manufacturer or authorized distributors?
All AZ1084S2-1.8TRE1 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 AZ1084S2-1.8TRE1 meets industry standards.
7.What is the process for return or replacement of AZ1084S2-1.8TRE1?
All AZ1084S2-1.8TRE1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ1084S2-1.8TRE1, 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 AZ1084S2-1.8TRE1 part is unused and in its original packaging.
Return procedure for AZ1084S2-1.8TRE1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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