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Diodes Incorporated AZ1117D-3.3TRE1
- Part No.:
- AZ1117D-3.3TRE1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
AZ1117D-3.3TRE1.pdf
- Description:
- IC REG LINEAR 3.3V 1A TO252-2
- Quantity:
- Payment:
- Shipping:
Inventory:709
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Product details
Overview
AZ1117D-3.3TRE1 from Diodes Incorporated is a fixed-output 3.3V, 1A low-dropout linear regulator in TO252-2 (3) package, featuring 1.15V dropout at full load, ±1% output voltage accuracy over temperature, and integrated thermal shutdown and current limiting. It delivers stable power to microcontroller cores, USB peripherals, and FPGA I/O banks in space-constrained industrial and embedded systems.
For engineers reviewing the AZ1117D-3.3TRE1 datasheet, AZ1117D-3.3TRE1 pinout, AZ1117D-3.3TRE1 application, or AZ1117D-3.3TRE1 equivalent, key selection criteria include dropout voltage at 1A, thermal resistance (θJC = 17°C/W), load regulation (≤10 mV), PSRR (≥60 dB at 120 Hz), and RoHS-compliant lead-free TO252-2 (3) packaging for surface-mount reflow compatibility.
Technical Context
The AZ1117D-3.3TRE1 uses a trimmed bandgap reference and PNP pass transistor architecture to achieve tight output voltage tolerance (3.267–3.365 V at 10mA–1A) across –40°C to +125°C junction temperature. Its internal current limit is factory-trimmed to 1.25–1.35 A, ensuring predictable short-circuit behavior without external components.
Thermal protection activates at +150°C junction temperature with +25°C hysteresis, and the device maintains ≥60 dB ripple rejection at 120 Hz with 22 µF tantalum output capacitance. Input voltage range is specified up to 15 V, with absolute maximum VIN at 20 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3 V ±1% (3.267–3.365 V at 10mA–1A, TJ = +25°C) |
| Dropout Voltage | 1.15 V at 1A load (ensures regulation with only 4.45 V input minimum) |
| Output Current | 1 A continuous (current-limited to 1.25–1.35 A for short-circuit protection) |
| Line Regulation | ≤6 mV (input variation from 4.75–10 V causes ≤6 mV output shift) |
| Load Regulation | ≤10 mV (output shifts ≤10 mV from 10 mA to 1 A load) |
| PSRR | ≥60 dB at 120 Hz (rejects 1 kHz–10 kHz ripple by >1000× amplitude ratio) |
| Thermal Resistance θJC | 17 °C/W (enables ~5.9 W max power dissipation before thermal shutdown at TA = 25°C) |
Pinout & Package
TO252-2 (3) package: exposed thermal pad (pin 2) connected to GND for optimal heat transfer; 3-pin surface-mount configuration with standard footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: INPUT | Regulator input supply | Accepts 4.75–15 V DC; requires local 10 µF ceramic input capacitor for stability |
| 2: GND | Ground reference and thermal pad | Must be soldered to large PCB copper area for θJA reduction; electrically tied to substrate |
| 3: OUTPUT | Regulated 3.3 V output | Delivers up to 1 A; requires 22 µF tantalum or low-ESR ceramic output capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout operation | 1.15 V at 1 A enables use with 5 V bus or single-cell Li-ion (4.2 V) input |
| Factory-trimmed output accuracy | ±1% over –40°C to +125°C eliminates need for external calibration |
| Integrated thermal shutdown | Activates at +150°C with +25°C hysteresis, preventing permanent die damage during overload |
| Current limiting | 1.25–1.35 A hard limit ensures predictable fault behavior without external sensing |
| Lead-free & RoHS compliant | Meets EU Directive 2015/863/EU; no intentionally added lead, halogen-free per Diodes Inc. definition |
Applications
| PC Motherboard Power | LCD Monitor Logic Supply |
|---|---|
Use Scenario: Providing clean 3.3 V to DDR memory termination and PCIe slot logic on ATX motherboards. IC Role / Device Role / Timing Role: Primary LDO for low-noise digital rail; replaces switching regulators where EMI sensitivity prohibits inductors. Use Value: 0.003% RMS output noise and 60 dB PSRR prevent data corruption in high-speed memory interfaces. |
Use Scenario: Supplying 3.3 V to timing controllers and display interface ICs in 24-inch LCD monitors. IC Role / Device Role / Timing Role: Fixed-voltage post-regulator after buck converter; stabilizes panel timing signals against input ripple. Use Value: Load regulation ≤10 mV ensures consistent gamma correction voltage across brightness levels. |
| Industrial PLC I/O Module | Network Interface Card (NIC) |
Use Scenario: Powering isolated RS-485 transceivers and microcontroller peripherals in DIN-rail mounted PLCs. IC Role / Device Role / Timing Role: Local point-of-load regulator for noise-sensitive communication circuitry. Use Value: Thermal shutdown at +150°C allows reliable operation in sealed enclosures up to +70°C ambient. |
Use Scenario: Delivering 3.3 V to Ethernet PHYs and MAC controllers on 10/100BASE-TX NICs. IC Role / Device Role / Timing Role: Secondary regulator following main 5 V DC-DC; supplies precise voltage for MII/RMII clock domains. Use Value: Line regulation ≤6 mV prevents jitter accumulation in 25 MHz reference clocks under varying upstream supply conditions. |
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 | Higher dropout (0.4 V typical at 3 A), higher quiescent current (30 mA), TO263-3 package | Supports 3 A load but requires larger heatsink; less suitable for 1 A space-constrained designs | Select when >1 A output or lower dropout at light loads is required; verify thermal layout for TO263 |
| TLV1117-33CDCYR | Lower max current (800 mA), tighter initial accuracy (±1%), SOT-223 package, higher θJA (120°C/W) | Not rated for 1 A continuous; limited to low-power MCU subsystems with minimal copper area | Choose only for cost-sensitive, low-current (<800 mA) applications where TO252 thermal performance is unnecessary |
Compared with MIC29302WU-3.3 and TLV1117-33CDCYR, the AZ1117D-3.3TRE1 uniquely balances 1 A capability, TO252-2 (3) thermal efficiency (θJC = 17°C/W), and ±1% accuracy in a RoHS-compliant, production-proven footprint - making it optimal for industrial 3.3 V rails requiring reliability without overdesign.
Availability
AZ1117D-3.3TRE1 is available at Aetrix Electronics and suitable for PC motherboard power delivery, LCD monitor logic supply, industrial PLC I/O modules, and network interface card (NIC) designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for AZ1117D-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
Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal devices, with design centers in Asia, Europe, and the U.S., serving industrial, computing, and consumer markets.
The AZ1117 series targets cost-sensitive, high-volume power management applications where precision, thermal robustness, and lead-free compliance are mandatory - particularly in computing peripherals and industrial control hardware.
FAQ
What is the minimum input voltage required for AZ1117D-3.3TRE1 to maintain regulation at 1 A?
The minimum input voltage is 4.45 V, calculated as VOUT + VDROP = 3.3 V + 1.15 V. At 1 A load and TJ = +25°C, dropout is guaranteed ≤1.25 V per datasheet, so 4.55 V ensures margin. Operation below 4.45 V results in unregulated output proportional to VIN.
Can AZ1117D-3.3TRE1 be used with ceramic output capacitors?
Yes, but only low-ESR types rated ≥22 µF and with ≥5 mΩ effective series resistance. The datasheet specifies 22 µF tantalum as default; ceramic capacitors require careful selection to avoid instability - Diodes Inc. recommends verifying phase margin with 100 nF–1 µF ceramic plus 22 µF bulk capacitance.
Does AZ1117D-3.3TRE1 require an input bypass capacitor?
Yes, a minimum 10 µF ceramic capacitor placed within 5 mm of the INPUT and GND pins is mandatory. This suppresses high-frequency noise from upstream converters and prevents oscillation due to trace inductance; omitting it risks output instability and increased ripple.
Is AZ1117D-3.3TRE1 pin-compatible with other AZ1117 variants in TO252-2 (3)?
Yes - all AZ1117 variants in TO252-2 (3) (e.g., AZ1117D-ADJTRE1, AZ1117D-5.0TRE1) share identical pinout (INPUT–GND–OUTPUT) and footprint. Only the output voltage and marking differ; no PCB redesign is needed when substituting fixed-voltage versions.
AZ1117D-3.3TRE1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- AZ1117
- 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):
- 15V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.25V @ 1A
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 10 mA
- Current - Supply (Max):
- -
- PSRR:
- 75dB (120Hz)
- Control Features:
- -
- Protection Features:
- Thermal Shutdown
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-252-3
AZ1117D-3.3TRE1 FAQ
1.How can I place an order for AZ1117D-3.3TRE1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ1117D-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 AZ1117D-3.3TRE1 reliable?
The price and inventory of AZ1117D-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 AZ1117D-3.3TRE1 is usually 5 days.
3.What payment methods are accepted for AZ1117D-3.3TRE1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ1117D-3.3TRE1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ1117D-3.3TRE1?
AZ1117D-3.3TRE1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ1117D-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 AZ1117D-3.3TRE1?
For technical support, including AZ1117D-3.3TRE1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ1117D-3.3TRE1 requirements.
6.How does Aetrix verify that AZ1117D-3.3TRE1 is sourced from the original manufacturer or authorized distributors?
All AZ1117D-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 AZ1117D-3.3TRE1 meets industry standards.
7.What is the process for return or replacement of AZ1117D-3.3TRE1?
All AZ1117D-3.3TRE1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ1117D-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 AZ1117D-3.3TRE1 part is unused and in its original packaging.
Return procedure for AZ1117D-3.3TRE1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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