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Diodes Incorporated AZ1086H-3.3TRE1
- Part No.:
- AZ1086H-3.3TRE1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
AZ1086H-3.3TRE1.pdf
- Description:
- IC REG LINEAR 3.3V 1.5A SOT223
- Quantity:
- Payment:
- Shipping:
Inventory:1,411
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Product details
Overview
AZ1086H-3.3TRE1 from BCD Semiconductor Manufacturing Limited is a fixed-output 3.3V, 1.5A low dropout linear regulator in SOT-223 package, featuring 1.3V typical dropout at full load, on-chip thermal shutdown, and ±1% output voltage accuracy over temperature and load. It delivers stable power for microprocessor core supplies and post-regulation in telecom and set-top box power rails.
For engineers reviewing the AZ1086H-3.3TRE1 datasheet, AZ1086H-3.3TRE1 pinout, AZ1086H-3.3TRE1 application, or AZ1086H-3.3TRE1 equivalent, this part supports high-current, low-noise LDO design with verified thermal protection, precise load regulation (7 mV max), and compatibility with standard 10–22 μF tantalum/low-ESR ceramic output capacitors.
Technical Context
The AZ1086H-3.3TRE1 implements a bandgap-referenced error amplifier driving a PNP pass transistor, enabling stable regulation with minimal headroom. Its internal current limiting (2.3A) and thermal shutdown (165°C trip, 30°C hysteresis) operate independently of external components.
Designed for fixed-output operation, it integrates precision feedback resistors-eliminating external dividers-and maintains 0.1% typical load regulation and 0.5 mV typical line regulation across its 4.75–10V input range, making it suitable for noise-sensitive analog and digital supply domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3V ±1% (guaranteed over 0–125°C junction temp and 10mA–1.5A load) |
| Dropout Voltage | 1.3V typical at 1.5A (enables operation with VIN as low as 4.6V for 3.3V out) |
| Output Current | 1.5A continuous (supports CPU core, FPGA I/O, or ASIC logic rail loads) |
| Current Limit | 2.3A (protects against short-circuit faults without external sensing) |
| Thermal Shutdown | 165°C junction trip with 30°C hysteresis (prevents permanent die damage during overload) |
| Ripple Rejection | 75dB at 120Hz (suppresses switching noise from upstream DC/DC converters) |
| Quiescent Current | 10mA max (minimizes no-load power loss in always-on subsystems) |
Pinout & Package
SOT-223 package (3-pin, surface-mount, exposed thermal pad); footprint compatible with JEDEC MO-178AB; thermal resistance θJA = 120°C/W, θJC = 19.35°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (INPUT) | Input voltage supply connection | Accepts 4.75–10V DC; requires ≥10μF input capacitance for stability and transient response |
| 2 (OUTPUT) | Regulated 3.3V output node | Delivers up to 1.5A; connects directly to load; requires ≥22μF low-ESR output capacitor |
| 3 (GND) | Ground reference and thermal path | Common return for input/output circuits; soldered thermal pad must be connected to PCB ground plane for thermal performance |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout operation | 1.3V typical at 1.5A enables use in battery-powered or multi-rail systems with tight voltage margins |
| Integrated thermal protection | 165°C shutdown with 30°C hysteresis ensures safe recovery after fault without manual reset |
| Precision fixed output | 3.3V ±1% tolerance eliminates need for external feedback resistors and calibration |
| High ripple rejection | 75dB at 120Hz suppresses switching artifacts from buck converters in hybrid power architectures |
| Robust current limiting | 2.3A foldback limit prevents thermal runaway during sustained overload or short-circuit conditions |
Applications
| Microprocessor Core Supply | Post-Regulation for Switching Supply |
|---|---|
Use Scenario: Providing clean, low-noise 3.3V to ARM Cortex-A series SoC cores in embedded gateways. IC Role / Device Role / Timing Role: Primary LDO regulator delivering stable VDD_CORE with fast transient response to dynamic CPU load changes. Use Value: Maintains <±1% output accuracy under 0.1–1.5A step loads, preventing brownout resets during burst processing. |
Use Scenario: Final-stage regulation after a 5V buck converter in cable modem power architecture. IC Role / Device Role / Timing Role: Noise-filtering LDO that removes switching ripple and improves PSRR for sensitive PHY layer circuitry. Use Value: 75dB ripple rejection at 120Hz reduces conducted EMI into Ethernet PHY and DOCSIS RF sections. |
| Telecom Equipment Power | Set-Top Box Module Supply |
Use Scenario: Powering 3.3V FPGA configuration and control logic in optical line terminal (OLT) line cards. IC Role / Device Role / Timing Role: High-current, thermally robust LDO ensuring reliable startup and sustained operation in fanless telecom chassis. Use Value: 120°C/W θJA and integrated thermal shutdown enable continuous 1.5A operation in 70°C ambient environments. |
Use Scenario: Supplying 3.3V to HDMI controller, audio DAC, and tuner ICs in consumer STB mainboard. IC Role / Device Role / Timing Role: Fixed-output LDO replacing discrete regulator solutions to reduce BOM count and layout area. Use Value: SOT-223 package allows compact placement near load; ±1% accuracy ensures compliance with HDMI 2.0 and Dolby Digital timing specs. |
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 |
|---|---|---|---|
| MIC29302WU-3.3 | 3A output, higher dropout (0.4V @ 3A), TO-263-5 package | Better suited for higher-current loads but requires larger board area and different thermal management | Select when >1.5A peak current or lower dropout at higher load is required; not drop-in due to pinout and package mismatch |
| TLV1117-33CDCY | 800mA output, 1.2V dropout @ 800mA, SOT-223-3, tighter initial accuracy (±1.5%) | Limited to sub-1A applications; lower thermal capacity and current capability | Choose only for cost-sensitive, low-power designs where 1.5A headroom is unnecessary |
Compared with MIC29302WU-3.3 and TLV1117-33CDCY, the AZ1086H-3.3TRE1 uniquely balances 1.5A capability, SOT-223 footprint, and 1.3V dropout-making it optimal for space-constrained, medium-current applications requiring proven thermal resilience without upgrading to TO-263.
Availability
AZ1086H-3.3TRE1 is available at Aetrix Electronics and suitable for telecom equipment power, set-top box module supply, microprocessor core supply, and post-regulation for switching supply requiring stable component supply and RoHS-compliant lead-free packaging.
Supply support for AZ1086H-3.3TRE1 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 regulators, MOSFETs, and mixed-signal products for industrial and communications markets.
The AZ1086 series was developed specifically for high-current, low-dropout linear regulation in space-constrained telecom, computing, and consumer power systems-emphasizing thermal robustness, precision, and ease of integration.
FAQ
What is the minimum input voltage required for stable 3.3V output at 1.5A?
The AZ1086H-3.3TRE1 requires a minimum input voltage of 4.6V (3.3V + 1.3V typical dropout) to maintain regulation at 1.5A load. The datasheet specifies absolute minimum VIN of 4.75V under all operating conditions to ensure margin for worst-case dropout (1.5V) and line/load regulation drift.
Can AZ1086H-3.3TRE1 be used with ceramic output capacitors?
Yes-ceramic capacitors ≥22μF with ≤10mΩ ESR are fully supported and recommended for improved transient response. The device's internal compensation is stable with ceramic, tantalum, or aluminum electrolytic types; no external compensation is needed.
Does the SOT-223 package require thermal vias for 1.5A operation?
Yes-reliable 1.5A continuous operation requires connecting the exposed thermal pad to a minimum 100 mm² internal or external copper pour via ≥4 thermal vias (0.3mm diameter). Without this, junction temperature exceeds 125°C at ambient >50°C, triggering thermal shutdown.
How does the AZ1086H-3.3TRE1 handle short-circuit events?
Under short-circuit, the device limits output current to ~2.3A and enters thermal shutdown if junction temperature reaches 165°C. After cooling by ≥30°C, it automatically recovers-no latch or external reset is required. This cycle repeats until fault is removed.
AZ1086H-3.3TRE1 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:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 15V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- 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-3.3TRE1 FAQ
1.How can I place an order for AZ1086H-3.3TRE1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ1086H-3.3TRE1 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-3.3TRE1 reliable?
The price and inventory of AZ1086H-3.3TRE1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ1086H-3.3TRE1 is usually 5 days.
3.What payment methods are accepted for AZ1086H-3.3TRE1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ1086H-3.3TRE1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ1086H-3.3TRE1?
AZ1086H-3.3TRE1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ1086H-3.3TRE1 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-3.3TRE1?
For technical support, including AZ1086H-3.3TRE1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ1086H-3.3TRE1 requirements.
6.How does Aetrix verify that AZ1086H-3.3TRE1 is sourced from the original manufacturer or authorized distributors?
All AZ1086H-3.3TRE1 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-3.3TRE1 meets industry standards.
7.What is the process for return or replacement of AZ1086H-3.3TRE1?
All AZ1086H-3.3TRE1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ1086H-3.3TRE1, 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-3.3TRE1 part is unused and in its original packaging.
Return procedure for AZ1086H-3.3TRE1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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