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Diodes Incorporated AZ1084CD-1.8TRG1
- Part No.:
- AZ1084CD-1.8TRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
AZ1084CD-1.8TRG1.pdf
- Description:
- IC REG LINEAR 1.8V 5A TO252-2
- Quantity:
- Payment:
- Shipping:
Inventory:1,444
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Product details
Overview
AZ1084CD-1.8TRG1 from Diodes Incorporated is a fixed-output 1.8V, 5A low-dropout linear regulator in TO252-2 (3) package with 1.35V typical dropout at full load, on-chip thermal limiting and current limiting, and compatibility with low-ESR ceramic output capacitors. It delivers stable microprocessor core voltage for embedded systems requiring high-current, low-noise post-regulation after switching supplies.
For engineers reviewing the AZ1084CD-1.8TRG1 datasheet, AZ1084CD-1.8TRG1 pinout, AZ1084CD-1.8TRG1 application, or AZ1084CD-1.8TRG1 equivalent, key selection criteria include dropout voltage at 5A, thermal shutdown behavior under sustained load, output voltage tolerance over temperature and line/load variation, and compatibility with compact ceramic capacitor networks in space-constrained PCB layouts.
Technical Context
The AZ1084CD-1.8TRG1 implements a trimmed bandgap reference with internal resistor divider to fix VOUT at 1.8V ±1.5% across 0°C to +125°C junction temperature. Its PNP pass transistor architecture enables low dropout while maintaining stability with ≥10µF ceramic output capacitance.
Thermal protection activates when junction temperature exceeds +150°C, and current limiting engages at 6.5A typical, both implemented via on-die circuitry without external components. Line regulation is 0.5mV typical over 3.3V–10V input range, and load regulation is 7mV typical from 0mA to 5A output current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8V ±1.5% (1.764V–1.836V) at 10mA–5A load, ensuring compliance with 1.8V core logic supply tolerances |
| Dropout Voltage | 1.35V typical at 4.5A, enabling operation from 3.15V input minimum for 1.8V output |
| Output Current | 5A continuous, supporting high-power SoC and FPGA core rails without external parallel devices |
| Current Limit | 6.5A typical, providing short-circuit protection while allowing brief inrush during power-up |
| Operating Temperature | 0°C to +125°C junction range, validated for industrial and embedded processor supply environments |
| Line Regulation | 0.5mV typical (6mV max) over 3.3V–10V input, minimizing output shift during input rail sag |
| Load Regulation | 7mV typical (20mV max) from 0mA to 5A, maintaining voltage accuracy across dynamic CPU load states |
Pinout & Package
Package: TO252-2 (3), surface-mount, thermally enhanced DPAK variant with exposed drain pad for PCB heat sinking. Dimensions: 6.5mm × 10.4mm × 2.38mm (L × W × H), weight 0.312g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (INPUT) | Input voltage supply connection | Accepts 3.3V–10V DC input; requires ≥10µF low-ESR ceramic bypass capacitor placed adjacent to pin |
| 2 (OUTPUT) | Regulated 1.8V output node | Delivers up to 5A; connects directly to load and output capacitor; trace width must support 5A continuous current |
| 3 (GND) | Ground reference and thermal path | Common return for internal circuitry and primary thermal conduction path to PCB copper pour |
Key Features
| Feature | Design Value |
|---|---|
| Low ESR capacitor compatibility | Stable with ≥10µF ceramic output capacitors, eliminating need for bulky tantalum or electrolytic types |
| Integrated thermal shutdown | Automatic foldback at +150°C junction temperature, preventing permanent damage during overload or poor heatsinking |
| Trimmed bandgap reference | 1.225V–1.270V reference voltage tolerance ensures 1.8V output accuracy without external calibration |
| Lead-free & RoHS compliant | Fully lead-free construction with <900ppm Br/Cl and <1000ppm Sb, meeting EU RoHS 3 and automotive green standards |
| High PSRR | 72dB at 120Hz, suppressing ripple from upstream switching converters in hybrid power architectures |
Applications
| Microprocessor Core Supply | Battery Charger Post-Regulator |
|---|---|
|
Use Scenario: Providing clean 1.8V core voltage to ARM Cortex-A series SoCs in industrial gateways. IC Role / Device Role / Timing Role: Primary LDO delivering regulated power to CPU VDD_CORE pins with fast transient response to load steps. Use Value: 7mV load regulation and 100µs transient recovery maintain core voltage within ±3% during 0–5A load transients, preventing clock domain violations. |
Use Scenario: Final-stage regulation after buck converter in USB-C PD battery charger for Li-ion packs. IC Role / Device Role / Timing Role: Low-noise linear post-regulator isolating sensitive analog charging control circuitry from switching noise. Use Value: 72dB PSRR at 120Hz attenuates switching ripple to <100µV RMS, ensuring accurate battery voltage sensing and charge termination. |
| Desktop PC Standby Rail | RISC-V Development Board Power |
|
Use Scenario: Generating always-on 1.8V standby voltage for real-time clock and wake-on-LAN circuitry. IC Role / Device Role / Timing Role: High-reliability LDO operating continuously at light load with minimal quiescent current impact. Use Value: 5mA typical IQ enables >1-year battery backup life in RTC applications without compromising startup speed or regulation accuracy. |
Use Scenario: Powering 1.8V I/O banks on RISC-V evaluation boards with mixed-signal peripherals. IC Role / Device Role / Timing Role: Single-chip solution replacing discrete regulators and filtering networks for compact board layout. Use Value: TO252-2 (3) footprint with integrated thermal pad reduces PCB area by 40% versus legacy TO-220 solutions while maintaining 5A capability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP1084K-18L-U | Same 1.8V/5A rating but higher 1.5V dropout (typ), 100°C/W θJA vs. 100°C/W for AZ1084CD-1.8TRG1 | Limited to lower ambient temperatures due to reduced thermal margin at full load | Prefer AZ1084CD-1.8TRG1 where board-level heatsinking is constrained or ambient exceeds 70°C |
| TLV1117-18CDCYR | Lower 800mA output current, 1.2V dropout at 800mA, SO-8 package with no exposed thermal pad | Suitable only for low-power MCU I/O rails, not core voltage delivery | Select AZ1084CD-1.8TRG1 when ≥3A continuous current and thermal robustness are required |
Compared with AP1084K-18L-U and TLV1117-18CDCYR, the AZ1084CD-1.8TRG1 provides superior thermal performance in TO252-2 (3) packaging, tighter output voltage tolerance over temperature, and verified stability with ceramic capacitors-making it the optimal choice for high-current, space-constrained embedded power rails.
Availability
AZ1084CD-1.8TRG1 is available at Aetrix Electronics and suitable for microprocessor core supplies, battery charger post-regulation, and desktop PC standby rails requiring stable component supply with full production traceability and long-term lifecycle support.
Supply support for AZ1084CD-1.8TRG1 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 high-reliability power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
The AZ1084C series targets high-current linear regulation in space-constrained applications, emphasizing thermal resilience, ceramic capacitor compatibility, and tight DC accuracy for next-generation embedded processors and power subsystems.
FAQ
What is the minimum input voltage required for AZ1084CD-1.8TRG1 to maintain regulation at 5A?
The minimum input voltage is calculated as VOUT + VDROP = 1.8V + 1.35V = 3.15V. At 5A load and +25°C, the device maintains regulation down to 3.15V input; however, derating is required above +85°C junction temperature due to increased dropout. The datasheet specifies 3.3V minimum input for guaranteed operation across full temperature and load range.
Can AZ1084CD-1.8TRG1 be used with 4.7µF ceramic output capacitors?
No. The datasheet mandates ≥10µF ceramic output capacitance for stability. Using 4.7µF violates the minimum requirement and risks oscillation or poor transient response. Validated designs use 10µF–22µF X5R/X7R ceramics with ≤10mΩ ESR, placed within 5mm of the OUTPUT and GND pins.
Does AZ1084CD-1.8TRG1 require an input bypass capacitor?
Yes. A minimum 10µF low-ESR ceramic capacitor must be placed between INPUT and GND, located within 3mm of the device pins. This prevents input rail instability during load transients and reduces high-frequency noise coupling into the regulator's control loop.
Is AZ1084CD-1.8TRG1 qualified for automotive applications?
No. While the device operates from 0°C to +125°C, it is not AEC-Q100 qualified. Diodes offers automotive-grade variants (e.g., AZ1084CQ series) with PPAP documentation, IATF 16949 manufacturing, and extended reliability testing-AZ1084CD-1.8TRG1 is intended for industrial and commercial applications only.
AZ1084CD-1.8TRG1 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:
- Active
- 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 @ 4.5A
- 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
AZ1084CD-1.8TRG1 FAQ
1.How can I place an order for AZ1084CD-1.8TRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ1084CD-1.8TRG1 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 AZ1084CD-1.8TRG1 reliable?
The price and inventory of AZ1084CD-1.8TRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ1084CD-1.8TRG1 is usually 5 days.
3.What payment methods are accepted for AZ1084CD-1.8TRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ1084CD-1.8TRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ1084CD-1.8TRG1?
AZ1084CD-1.8TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ1084CD-1.8TRG1 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 AZ1084CD-1.8TRG1?
For technical support, including AZ1084CD-1.8TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ1084CD-1.8TRG1 requirements.
6.How does Aetrix verify that AZ1084CD-1.8TRG1 is sourced from the original manufacturer or authorized distributors?
All AZ1084CD-1.8TRG1 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 AZ1084CD-1.8TRG1 meets industry standards.
7.What is the process for return or replacement of AZ1084CD-1.8TRG1?
All AZ1084CD-1.8TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ1084CD-1.8TRG1, 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 AZ1084CD-1.8TRG1 part is unused and in its original packaging.
Return procedure for AZ1084CD-1.8TRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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