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Diodes Incorporated AZ1084D-ADJTRG1
- Part No.:
- AZ1084D-ADJTRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
AZ1084D-ADJTRG1.pdf
- Description:
- IC REG LINEAR POS ADJ 5A TO252-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,852
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Product details
Overview
AZ1084D-ADJTRG1 from Diodes Incorporated is an adjustable 5A low-dropout linear regulator in TO-252-2 (3) package, delivering stable output voltage via external resistor divider, with 1.3V typical dropout at full load, ±1.5% output voltage accuracy over temperature, and integrated thermal shutdown and current limiting. It serves as a post-regulator for switching supplies in embedded microprocessor power rails.
For engineers reviewing the AZ1084D-ADJTRG1 datasheet, AZ1084D-ADJTRG1 pinout, AZ1084D-ADJTRG1 application, or AZ1084D-ADJTRG1 equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, application-specific implementation guidance, and confirmed alternative options for LDO selection in high-current analog and digital supply systems.
Technical Context
The AZ1084D-ADJTRG1 uses a trimmed band-gap reference and internal error amplifier to regulate output voltage based on feedback from the ADJ pin. Its dropout behavior remains linear down to 1.3V at 5A, enabling operation with minimal input–output differential across its 0–125°C junction temperature range.
Thermal protection activates when junction temperature exceeds +150°C, and current limiting engages at 6.5A typical, both implemented via on-chip circuitry without external components. Load and line regulation are specified at 0.1% and 0.015% respectively for the adjustable version, supporting precision rail generation in noise-sensitive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 5A continuous - supports high-power microprocessor core or FPGA I/O rails without external pass devices. |
| Dropout Voltage | 1.3V typical at 5A - enables ≥3.3V output from 4.6V input, critical for battery-powered post-regulation. |
| Reference Voltage | 1.225V to 1.270V - sets output accuracy baseline; VOUT = VREF × (1 + R2/R1) + IADJ × R2. |
| Line Regulation | 0.015% typical - ensures <±0.5mV output shift per 1V input change, vital for stable ADC reference supplies. |
| Load Regulation | 0.1% typical - guarantees ≤3.3mV output deviation from 0 to 5A load, suitable for dynamic CPU supply loads. |
| Quiescent Current | 5–10mA - low bias current preserves efficiency in always-on subsystems while maintaining fast transient response. |
| PSRR | 72dB at 120Hz - suppresses ripple from upstream switching converters, reducing need for large output capacitance. |
Pinout & Package
Package: TO-252-2 (3), surface-mount, lead-free, RoHS-compliant, with exposed thermal pad connected to GND/ADJ terminal for enhanced heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (INPUT) | Input voltage supply | Accepts 2.85–12V input; requires ≥10µF ceramic input capacitor close to pin for stability and EMI reduction. |
| 2 (OUTPUT) | Regulated output voltage | Delivers adjustable output (≥1.25V); connects to 22µF tantalum or low-ESR polymer output capacitor for transient response. |
| 3 (ADJ/GND) | Feedback and ground reference | Serves as voltage divider node and thermal pad connection point; must be tied to system ground for proper regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout voltage | 1.3V typical at 5A enables efficient operation with minimal headroom-critical for single-cell Li-ion or 5V bus post-regulation. |
| Integrated thermal protection | Shuts down at +150°C junction temperature and auto-recovers upon cooling-eliminates need for external thermal sensors in compact PCB layouts. |
| Current limiting | 6.5A typical foldback limit prevents damage during short-circuit events without requiring external current-sense resistors. |
| Adjustable output | Configurable from 1.25V to 12V using two external resistors-supports multiple rail voltages from one BOM item in multi-voltage systems. |
| Lead-free & green packaging | TO-252-2 (3) meets RoHS 2 and halogen/antimony-free "Green" requirements (<900ppm Br+Cl, <1000ppm Sb)-complies with global environmental mandates. |
Applications
| Microprocessor Core Supply | Battery Charger Post-Regulator |
|---|---|
|
Use Scenario: Powering ARM Cortex-A series SoCs requiring clean, tightly regulated 1.2V–1.8V core voltage with fast load transients. IC Role / Device Role / Timing Role: Primary LDO delivering stable core rail; responds to 10mA–5A load steps within 100µs. Use Value: 0.1% load regulation and 72dB PSRR maintain <±10mV output deviation during CPU burst activity, preventing timing violations. |
Use Scenario: Final-stage regulation after buck converter in USB-C PD battery chargers delivering 4.2V/4.35V to Li-ion cells. IC Role / Device Role / Timing Role: Precision post-regulator ensuring constant-voltage charge termination accuracy. Use Value: ±1.5% total output tolerance over temperature guarantees ±15mV accuracy at 4.2V, meeting JEITA charge profile compliance. |
| Desktop PC Standby Rail | Industrial PLC I/O Module Supply |
|
Use Scenario: Generating +3.3V standby rail (always-on) for RTC, wake logic, and USB suspend detection in ATX motherboards. IC Role / Device Role / Timing Role: Low-noise, low-quiescent LDO supplying always-active control circuitry. Use Value: 0.003% RMS noise and 5–10mA IQ enable reliable 32.768kHz crystal oscillator operation and deep-sleep current budget adherence. |
Use Scenario: Providing isolated +5.0V for analog sensor signal conditioning and digital I/O buffers in harsh industrial environments. IC Role / Device Role / Timing Role: Robust local regulator with thermal/current protection for field-side power domains. Use Value: 0–125°C operating range and automatic thermal shutdown ensure uninterrupted operation in uncooled enclosures up to 70°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable 5A LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP1084K-ADJ | Same 5A rating and TO-252-2 (3) package, but 1.5V dropout at 5A (vs. 1.3V typ), 0.2% load regulation (vs. 0.1% typ). | Limited in ultra-low-headroom designs; less suitable for sub-5V input-to-3.3V output conversion. | Prefer AZ1084D-ADJTRG1 where dropout margin is constrained below 1.4V. |
| LT1963AEST-ADJ | 3A max output, SO-8 package, 340mV dropout at 1.5A, integrated soft-start, lower noise (40µVRMS). | Not scalable to 5A loads; requires parallel devices or different topology for equivalent current capability. | Select only for space-constrained, lower-current, ultra-low-noise applications where 5A is not required. |
Compared with AP1084K-ADJ and LT1963AEST-ADJ, AZ1084D-ADJTRG1 uniquely delivers 5A output with 1.3V dropout in a thermally optimized TO-252-2 (3) package, making it the only drop-in solution for high-current, low-headroom LDO needs without derating or paralleling.
Availability
AZ1084D-ADJTRG1 is available at Aetrix Electronics and suitable for microprocessor core supply, battery charger post-regulation, and industrial PLC I/O module supply requiring stable component supply across extended production lifecycles.
Supply support for AZ1084D-ADJTRG1 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.
AZ1084D-ADJTRG1 belongs to the AZ1084 series of high-current LDO regulators designed specifically for post-regulation in switching power supply architectures and high-efficiency linear power delivery in embedded and computing systems.
FAQ
What is the minimum input voltage required for AZ1084D-ADJTRG1 to regulate a 3.3V output?
The minimum input voltage equals the output voltage plus the dropout voltage. With 3.3V output and 1.3V typical dropout at 5A, the minimum input is 4.6V. At light loads, dropout drops further-down to ~1.1V at 1A-so 4.4V may suffice under partial load, but 4.6V ensures full 5A capability across temperature.
Can AZ1084D-ADJTRG1 be used without an output capacitor?
No. The datasheet mandates ≥22µF output capacitance (tantalum or low-ESR polymer) for stability and transient response. Omitting it causes oscillation and potential thermal runaway due to phase margin loss in the internal control loop.
How does the ADJ pin current affect output voltage accuracy?
IADJ is 55–120µA and flows through R2 in the feedback divider. For a typical 1.25V reference and 3.3V output (R2/R1 ≈ 1.64), a 100µA IADJ adds ~164µA error current into R2, causing ~0.2% additional output error. This is included in the ±1.5% total accuracy spec.
Is AZ1084D-ADJTRG1 still in active production?
No-AZ1084D-ADJTRG1 is obsolete and discontinued by Diodes Incorporated. The recommended replacement is AZ1084C-ADJTRG1, which maintains identical electrical specs and pinout but features updated process and qualification. Aetrix Electronics holds legacy stock and supports transition planning.
AZ1084D-ADJTRG1 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:
- 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:
- Surface Mount
- Supplier Device Package:
- TO-252-3
AZ1084D-ADJTRG1 FAQ
1.How can I place an order for AZ1084D-ADJTRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ1084D-ADJTRG1 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-ADJTRG1 reliable?
The price and inventory of AZ1084D-ADJTRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ1084D-ADJTRG1 is usually 5 days.
3.What payment methods are accepted for AZ1084D-ADJTRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ1084D-ADJTRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ1084D-ADJTRG1?
AZ1084D-ADJTRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ1084D-ADJTRG1 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-ADJTRG1?
For technical support, including AZ1084D-ADJTRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ1084D-ADJTRG1 requirements.
6.How does Aetrix verify that AZ1084D-ADJTRG1 is sourced from the original manufacturer or authorized distributors?
All AZ1084D-ADJTRG1 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-ADJTRG1 meets industry standards.
7.What is the process for return or replacement of AZ1084D-ADJTRG1?
All AZ1084D-ADJTRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ1084D-ADJTRG1, 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-ADJTRG1 part is unused and in its original packaging.
Return procedure for AZ1084D-ADJTRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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