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Diodes Incorporated AZ1084T-ADJE1
- Part No.:
- AZ1084T-ADJE1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-220-3
- Datasheet:
-
AZ1084T-ADJE1.pdf
- Description:
- IC REG LINEAR POS ADJ 5A TO220-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,332
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Product details
Overview
AZ1084T-ADJE1 from Diodes Incorporated is an adjustable 5A low-dropout linear regulator in TO-220-3 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 desktop PCs and embedded systems.
For engineers reviewing the AZ1084T-ADJE1 datasheet, AZ1084T-ADJE1 pinout, AZ1084T-ADJE1 application, or AZ1084T-ADJE1 equivalent, this page provides verified technical context, validated pin functions, confirmed thermal and regulation specs, and real-world application mappings - all derived from Diodes Incorporated's official DS36598 Rev. 3-2 datasheet.
Technical Context
The AZ1084T-ADJE1 implements a band-gap referenced error amplifier driving a PNP pass transistor, enabling precise output voltage control via external resistive divider on the ADJ pin. Its internal current limit (6.5A) and thermal foldback protect against sustained overload and ambient-induced junction overheating up to +125°C.
Line regulation is 0.015% (typical) and load regulation is 0.1% (typical) for the adjustable version, ensuring minimal output deviation across input voltage swings (2.85–10V) and load currents (0–5A). The device operates without minimum load requirement above 3mA, simplifying design in low-power standby states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 5A continuous - supports high-current digital loads like RISC processor cores and FPGA I/O banks. |
| Dropout Voltage | 1.3V typical at 5A - enables operation with only 1.3V headroom, critical for battery-powered post-regulation. |
| Reference Voltage | 1.225V to 1.270V - tight 1.25V ±1.7% tolerance ensures accurate programmable output setting. |
| Current Limit | 6.5A - provides robust short-circuit protection while allowing brief inrush during system startup. |
| Thermal Shutdown | Activates at +150°C junction - prevents permanent damage under sustained overload or poor heatsinking. |
| PSRR | 72dB at 120Hz - suppresses ripple from upstream switching converters, reducing need for additional filtering. |
| Quiescent Current | 5–10mA - low bias draw maintains efficiency in always-on subsystems without compromising regulation speed. |
Pinout & Package
Package: TO-220-3 (3-pin through-hole, tab-connected to OUTPUT, RoHS-compliant lead-free finish).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (INPUT) | Unregulated input supply connection | Accepts 2.85–12V input; must be decoupled with ≥10µF capacitor near pin to ensure stability. |
| 2 (OUTPUT) | Regulated output voltage node | Tab-connected in TO-220-3; requires thermal pad contact to PCB copper for θJA = 60°C/W performance. |
| 3 (ADJ/GND) | Feedback reference and current sink | Connects to resistor divider (R1/R2); sinks 55–120µA - sets VOUT = 1.25V × (1 + R2/R1) + IADJ×R2. |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout voltage | 1.3V at 5A enables use with 3.3V or 5V intermediate rails where headroom is constrained. |
| Integrated thermal protection | Automatic foldback below +125°C junction ensures safe operation without external thermal sensors. |
| Adjustable output range | Programmable from 1.25V to 10V using two external resistors - supports diverse core and I/O voltage requirements. |
| Lead-free & green packaging | TO-220-3 package meets RoHS 2 and halogen/antimony-free "Green" standards (≤900ppm Br/Cl, ≤1000ppm Sb). |
| High PSRR | 72dB at 120Hz reduces sensitivity to switching noise - eliminates need for cascaded LDO stages in noise-sensitive analog sections. |
Applications
| Microprocessor Core Supply | Battery Charger Post-Regulation |
|---|---|
|
Use Scenario: Providing clean, tightly regulated 1.2V–1.8V to ARM Cortex-A series processors in industrial edge controllers. IC Role / Device Role / Timing Role: Primary voltage regulation stage delivering low-noise DC power to CPU core logic and cache SRAM. Use Value: 0.1% load regulation and 72dB PSRR maintain <±10mV output deviation during dynamic current transients up to 5A. |
Use Scenario: Final-stage regulation after buck converter in 12V automotive battery charger modules. IC Role / Device Role / Timing Role: Precision post-regulator ensuring constant-voltage charging compliance for LiFePO₄ cells. Use Value: 1.3V dropout allows operation down to 13.3V input when alternator output dips, sustaining 12.6V charge voltage. |
| Desktop PC +12V Rail Conditioning | Industrial PLC I/O Power |
|
Use Scenario: Generating +5V/3.3V auxiliary rails from ATX +12V supply in compact embedded PC designs. IC Role / Device Role / Timing Role: High-current linear regulator replacing inefficient discrete solutions in space-constrained motherboards. Use Value: TO-220-3 package with tab-to-output enables direct mounting to chassis ground plane, achieving 60°C/W θJA without added heatsink. |
Use Scenario: Powering isolated digital I/O modules requiring stable 5V at up to 4.5A in factory automation cabinets. IC Role / Device Role / Timing Role: Main DC-DC regulator supplying field-side logic and level-shifting circuitry. Use Value: Thermal shutdown at +150°C prevents failure during prolonged 55°C ambient operation with limited airflow. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1529CT-5#PBF | Fixed 5V output, 3A max, 0.35V dropout at 3A, higher cost, no ADJ pin | Not suitable for programmable output; limited to fixed-rail use cases | Select only if 5V fixed output suffices and lower dropout is mandatory |
| TPS75733KTTT | 3A max, 0.17V dropout at 3A, integrated enable/shutdown, QFN-20 package | Requires PCB redesign for surface-mount layout; lacks TO-220 mechanical robustness | Prefer for space-constrained, high-efficiency designs where thermal pad soldering is feasible |
Compared with LT1529CT-5#PBF and TPS75733KTTT, the AZ1084T-ADJE1 uniquely balances 5A capability, adjustable output, TO-220-3 mechanical reliability, and cost-effective through-hole assembly - making it optimal for industrial power modules requiring field-serviceable replacement and wide input/output flexibility.
Availability
AZ1084T-ADJE1 is available at Aetrix Electronics and suitable for desktop PC power delivery, industrial PLC I/O subsystems, and battery charger post-regulation requiring stable component supply across multi-year production cycles.
Supply support for AZ1084T-ADJE1 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 semiconductor manufacturer specializing in discrete, analog, and mixed-signal components, with emphasis on power management, signal integrity, and protection devices.
The AZ1084 series belongs to Diodes' high-current LDO portfolio, engineered specifically for post-regulation in computing, industrial, and battery-powered systems where precision, thermal resilience, and package versatility are critical.
FAQ
What is the minimum input-to-output voltage required for stable regulation?
The AZ1084T-ADJE1 requires a minimum dropout of 1.3V (typical) at 5A load to maintain regulation. At light loads (<100mA), dropout drops to ~0.8V. Operation below specified dropout causes output voltage collapse and loss of feedback control - verify VIN ≥ VOUT + 1.5V (max) across full temperature and load range.
Can the ADJ pin be left floating or tied directly to ground?
No. The ADJ pin must be connected to a resistor divider between OUTPUT and GND to set VOUT. Floating or grounding ADJ forces unregulated output (~VIN − VBE) and risks thermal runaway. Minimum recommended R1 is 150Ω to limit IADJ-induced error and ensure ≥3mA load current per datasheet.
Is a heatsink mandatory for 5A continuous operation?
Yes. With θJA = 60°C/W and maximum power dissipation of ~7.5W at 5A/1.5V dropout, junction temperature rises ~450°C above ambient without heatsinking. A 10°C/W heatsink (or ≥10cm² 2oz copper pour) is required to hold TJ ≤ +125°C at +50°C ambient.
Does the device require input or output capacitance for stability?
Yes. Diodes specifies ≥10µF tantalum or ≥22µF aluminum electrolytic at INPUT and ≥10µF at OUTPUT. Ceramic capacitors alone are insufficient due to ESR requirements; adding 1Ω series resistor to ceramic output cap may stabilize if low-ESR types are used.
AZ1084T-ADJE1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- 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:
- Through Hole
- Supplier Device Package:
- TO-220-3
AZ1084T-ADJE1 FAQ
1.How can I place an order for AZ1084T-ADJE1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ1084T-ADJE1 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 AZ1084T-ADJE1 reliable?
The price and inventory of AZ1084T-ADJE1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ1084T-ADJE1 is usually 5 days.
3.What payment methods are accepted for AZ1084T-ADJE1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ1084T-ADJE1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ1084T-ADJE1?
AZ1084T-ADJE1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ1084T-ADJE1 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 AZ1084T-ADJE1?
For technical support, including AZ1084T-ADJE1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ1084T-ADJE1 requirements.
6.How does Aetrix verify that AZ1084T-ADJE1 is sourced from the original manufacturer or authorized distributors?
All AZ1084T-ADJE1 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 AZ1084T-ADJE1 meets industry standards.
7.What is the process for return or replacement of AZ1084T-ADJE1?
All AZ1084T-ADJE1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ1084T-ADJE1, 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 AZ1084T-ADJE1 part is unused and in its original packaging.
Return procedure for AZ1084T-ADJE1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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