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Diodes Incorporated AZ1086H-ADJTRG1
- Part No.:
- AZ1086H-ADJTRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
AZ1086H-ADJTRG1.pdf
- Description:
- IC REG LIN POS ADJ 1.5A SOT223-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,996
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Product details
Overview
AZ1086H-ADJTRG1 from BCD Semiconductor Manufacturing Limited is an adjustable low-dropout linear regulator delivering up to 1.5A output current with typical dropout voltage of 1.3V at full load, thermal shutdown protection, and ±1.2% reference voltage accuracy (1.225–1.270V). It operates across 0°C to 125°C junction temperature and supports post-regulation in switching power supplies for microprocessor core rails.
For engineers reviewing the AZ1086H-ADJTRG1 datasheet, AZ1086H-ADJTRG1 pinout, AZ1086H-ADJTRG1 application, or AZ1086H-ADJTRG1 equivalent, this part serves as a high-current, green-packaged LDO for space-constrained motherboard and telecom power domains where precise output adjustability and thermal robustness are required.
Technical Context
The AZ1086H-ADJTRG1 implements a bandgap-referenced error amplifier driving a PNP pass transistor, enabling stable regulation with external resistor feedback. Its internal current limiting (2.3A) and thermal shutdown (165°C trip, 30°C hysteresis) operate independently of load conditions.
Designed for fixed or adjustable configurations, the ADJ version uses two external resistors to set VOUT = VREF × (1 + R2/R1) + IADJ × R2, where IADJ remains ≤120μA over temperature. Load regulation stays within 0.4% across 10mA–1.5A output range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1.5A continuous - supports high-current digital loads like microprocessor cores and FPGA I/O banks. |
| Dropout Voltage | 1.3V typical at 1.5A - enables operation with minimal input–output differential, improving efficiency in battery-backed or post-switching-supply applications. |
| Reference Voltage | 1.225–1.270V - tight tolerance ensures ±1.2% output accuracy when using precision external resistors. |
| Line Regulation | 0.015% typical - maintains stable output despite input rail fluctuations, critical for noise-sensitive analog subsystems. |
| Thermal Shutdown | 165°C junction trip with 30°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking. |
| Quiescent Current | 5–10mA - low bias consumption preserves efficiency in always-on power domains without compromising transient response. |
| Ripple Rejection | 60–75dB at 120Hz - suppresses switching noise from upstream DC/DC converters, enabling clean supply for ADCs and PLLs. |
Pinout & Package
SOT-223 package (3-pin, surface-mount), thermally enhanced with exposed tab connected to GND/ADJ pin for improved heat dissipation. Pin 1: INPUT; Pin 2: OUTPUT; Pin 3: ADJ/GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (INPUT) | Unregulated input supply connection | Accepts 2.7–15V input; must be decoupled with ≥10μF ceramic/tantalum capacitor to ensure stability and transient immunity. |
| Pin 2 (OUTPUT) | Regulated output node | Delivers adjustable voltage; requires ≥22μF output capacitance (low-ESR tantalum or ceramic) for loop stability and load transient response. |
| Pin 3 (ADJ/GND) | Feedback reference and ground return | Connects to voltage divider (R1–R2) for output setting; also serves as thermal pad attachment point and primary ground path for internal protection circuits. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable output via two resistors | Enables custom VOUT from 1.25V to ≤VIN − 1.3V without requiring multiple fixed-voltage SKUs. |
| Integrated thermal shutdown | Automatically disables output above 165°C junction temperature, preventing catastrophic failure under sustained overload. |
| Current limiting | 2.3A foldback limit protects against short-circuit events while minimizing power dissipation during fault conditions. |
| Green RoHS-compliant packaging | G1 suffix indicates halogen-free, lead-free construction meeting IPC/JEDEC J-STD-020 moisture sensitivity level 3 (MSL3). |
| Low quiescent current | 5–10mA operation enables use in standby power rails without significant battery drain or idle power loss. |
Applications
| Microprocessor Core Supply | Battery Charger Post-Regulator |
|---|---|
Use Scenario: Providing clean, tightly regulated 1.2–1.8V supply to ARM Cortex-A series SoCs on embedded motherboards. IC Role / Device Role / Timing Role: Primary voltage regulation stage after buck converter, delivering low-noise, low-ripple power to CPU core logic. Use Value: 60–75dB ripple rejection and 0.4% load regulation ensure stable core voltage during dynamic frequency scaling and burst workloads. |
Use Scenario: Final-stage regulation in Li-ion battery charging circuits, converting 5V USB or adapter output to precise 4.2V charge termination voltage. IC Role / Device Role / Timing Role: Precision voltage reference and current-limited output driver ensuring safe constant-voltage phase completion. Use Value: 1.225–1.270V reference accuracy and 2.3A current limit enable ±0.5% charge voltage control and overcurrent-safe termination. |
| Telecom Line Card Power | Set-Top Box AV Subsystem |
Use Scenario: Generating isolated 3.3V and 5.0V rails for Ethernet PHYs, SerDes interfaces, and management controllers in carrier-grade line cards. IC Role / Device Role / Timing Role: Secondary LDO supplying noise-sensitive analog front-end circuitry and clock distribution ICs. Use Value: 0.015% line regulation and 120°C max operating junction temperature support reliable operation in fanless, high-density telecom chassis. |
Use Scenario: Powering HDMI transmitter ICs, audio DACs, and video decoder SoCs in consumer STB platforms requiring low EMI and thermal headroom. IC Role / Device Role / Timing Role: Local point-of-load regulator delivering stable 1.8V/3.3V to high-speed digital interfaces and analog signal chains. Use Value: SOT-223 footprint and 120°C/W θJA allow direct PCB copper pour heatsinking, eliminating need for discrete thermal vias in cost-sensitive designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC29302WU | Higher dropout (0.4V typ @ 3A), TO-263-5 package, no ADJ/GND shared pin | Supports higher current but lacks SOT-223 footprint and integrated thermal pad grounding | Prefer when >1.5A output or lower dropout is mandatory; avoid if board space or thermal pad routing constraints apply |
| LD1086DT-TR | Fixed-output variants only; adjustable version (LD1086D2T) uses separate GND pin, not ADJ/GND combo | Requires additional PCB trace routing for GND separation; less flexible for multi-rail designs | Select only for legacy ST design reuse; not recommended for new designs requiring compact ADJ/GND integration |
Compared with MIC29302WU and LD1086DT-TR, AZ1086H-ADJTRG1 uniquely combines SOT-223 thermal efficiency, single-pin ADJ/GND simplification, and 1.3V dropout at 1.5A-making it optimal for space-constrained, thermally demanding LDO applications where layout simplicity and thermal performance are prioritized over ultra-low dropout or ultra-high current.
Availability
AZ1086H-ADJTRG1 is available at Aetrix Electronics and suitable for motherboard power supply, telecom line card, and set-top box AV subsystem applications requiring stable component supply with green packaging compliance and extended temperature operation.
Supply support for AZ1086H-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
BCD Semiconductor Manufacturing Limited is a Shanghai-based analog and power IC designer specializing in high-reliability, cost-optimized linear regulators, MOSFETs, and mixed-signal solutions for industrial and consumer markets.
The AZ1086 series targets mid-power, thermally constrained LDO applications-including post-regulation, battery charging, and microprocessor supply-where dropout voltage, thermal robustness, and package flexibility outweigh ultra-precision or ultra-low IQ requirements.
FAQ
What is the minimum load current required for stable operation of AZ1086H-ADJTRG1?
The AZ1086H-ADJTRG1 requires a minimum load current of 2–5mA across its operating junction temperature range (0°C to 125°C), as specified in the datasheet's Electrical Characteristics table. This ensures proper biasing of the internal bandgap reference and error amplifier. Below this threshold, output voltage may drift or regulation may become unstable, especially near dropout conditions.
Can AZ1086H-ADJTRG1 be used with ceramic output capacitors?
Yes, AZ1086H-ADJTRG1 is compatible with ceramic output capacitors, provided they meet the minimum 22μF value and have sufficient effective capacitance at DC bias. The datasheet specifies low-ESR tantalum as the reference, but ceramic capacitors with X5R/X7R dielectrics and appropriate derating (e.g., 47μF 6.3V X5R) deliver superior transient response and reliability without oscillation risk.
How does the ADJ/GND pin function in the SOT-223 package?
In the AZ1086H-ADJTRG1 SOT-223 package, Pin 3 serves as both the adjustment reference node and the thermal ground connection. Internally, it connects to the die substrate and the error amplifier's reference input. Externally, it must be tied to the bottom-side thermal pad and forms one leg of the R1–R2 feedback divider-requiring careful PCB layout to avoid ground bounce or thermal coupling errors.
What is the maximum allowable input voltage for AZ1086H-ADJTRG1?
The absolute maximum input voltage for AZ1086H-ADJTRG1 is 15V, as stated in the Absolute Maximum Ratings table. Operation above this level risks permanent damage to the internal pass transistor and bandgap circuitry. For reliable long-term use, the recommended maximum is 13V, especially at elevated ambient temperatures where power dissipation and thermal margin become critical.
AZ1086H-ADJTRG1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 15V
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- 13.5V
- Voltage Dropout (Max):
- 1.5V @ 1.5A
- Current - Output:
- 1.5A
- Current - Quiescent (Iq):
- 10 mA
- Current - Supply (Max):
- -
- PSRR:
- 75dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- 0°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
AZ1086H-ADJTRG1 FAQ
1.How can I place an order for AZ1086H-ADJTRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ1086H-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 AZ1086H-ADJTRG1 reliable?
The price and inventory of AZ1086H-ADJTRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ1086H-ADJTRG1 is usually 5 days.
3.What payment methods are accepted for AZ1086H-ADJTRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ1086H-ADJTRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ1086H-ADJTRG1?
AZ1086H-ADJTRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ1086H-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 AZ1086H-ADJTRG1?
For technical support, including AZ1086H-ADJTRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ1086H-ADJTRG1 requirements.
6.How does Aetrix verify that AZ1086H-ADJTRG1 is sourced from the original manufacturer or authorized distributors?
All AZ1086H-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 AZ1086H-ADJTRG1 meets industry standards.
7.What is the process for return or replacement of AZ1086H-ADJTRG1?
All AZ1086H-ADJTRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ1086H-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 AZ1086H-ADJTRG1 part is unused and in its original packaging.
Return procedure for AZ1086H-ADJTRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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