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Diodes Incorporated AZ1117S-3.3TRE1
- Part No.:
- AZ1117S-3.3TRE1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
AZ1117S-3.3TRE1.pdf
- Description:
- IC REG LINEAR 3.3V 1.25A TO263-2
- Quantity:
- Payment:
- Shipping:
Inventory:4,431
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Product details
Overview
AZ1117S-3.3TRE1 from Diodes Incorporated is a fixed-output 3.3V, 1A low-dropout linear regulator in SOT-223 package, delivering ±1% output voltage accuracy at 10mA–1A load, with 1.15V dropout at full current and integrated thermal shutdown. It serves as a primary post-regulation supply for microcontroller cores, DDR memory termination, and USB peripheral power in embedded systems.
For engineers reviewing the AZ1117S-3.3TRE1 datasheet, AZ1117S-3.3TRE1 pinout, AZ1117S-3.3TRE1 application, or AZ1117S-3.3TRE1 equivalent, key selection criteria include dropout voltage at 1A, thermal resistance (θJA = 120°C/W), output voltage tolerance over temperature, ripple rejection (75dB @ 120Hz), and SOT-223 thermal pad layout compatibility.
Technical Context
The AZ1117S-3.3TRE1 uses a trimmed bandgap reference and PNP pass transistor architecture to maintain stable 3.3V output across –40°C to +125°C junction temperature. Its internal current limit (1.25–1.35A) and thermal shutdown (trip at +150°C, +25°C hysteresis) operate independently of external components.
Unlike switching regulators, it requires no external compensation and achieves 0.003% RMS output noise (10Hz–10kHz) with only 10µF input and 22µF output tantalum capacitors. Load regulation remains within ±0.4% from 10mA to 1A at fixed 2V headroom.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3V ±1% (10mA–1A, –40°C to +125°C); enables direct powering of 3.3V logic without trimming resistors |
| Dropout Voltage | 1.15V at 1A (ΔVOUT = 1%); supports operation from 4.45V input minimum in worst-case thermal conditions |
| Load Regulation | ±0.4% (10mA → 1A, VIN–VOUT = 2V); ensures stable rail under dynamic CPU/memory load transitions |
| Ripple Rejection | 75dB @ 120Hz (COUT = 22µF tantalum); suppresses switching noise from upstream DC/DC converters |
| Thermal Shutdown | Activates at +150°C junction, +25°C hysteresis; prevents permanent damage during sustained overload or poor PCB heatsinking |
| Quiescent Current | 5–10mA (VIN = VOUT + 1.25V); minimizes no-load power loss in always-on subsystems |
| PSRR Bandwidth | Effective up to 100kHz; maintains clean output despite high-frequency noise on input rail |
Pinout & Package
SOT-223 package with exposed thermal pad (pin 2 connected to VOUT for heatsinking). Standard 3-pin configuration optimized for low-profile PCB mounting and manual rework.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Tab) | VOUT | Power output terminal and thermal pad connection; must be soldered to ≥100mm² copper pour for θJA ≤ 120°C/W |
| 2 | INPUT | Main input supply connection; requires ≥10µF ceramic or tantalum bypass capacitor within 5mm |
| 3 | GND | Ground reference for regulator control circuitry and feedback path; separate low-impedance return required |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 3.3V output | Eliminates external resistor network, reducing BOM count and layout sensitivity vs. adjustable variants |
| 1.15V dropout @ 1A | Enables single-cell Li-ion (3.0–4.2V) or 5V rail post-regulation without headroom margin penalty |
| ±1% output accuracy | Meets tight tolerance requirements for FPGA I/O banks and ARM Cortex-A/M core supplies |
| Integrated thermal shutdown | Self-protecting operation under sustained overload or inadequate PCB copper; no external sensor needed |
| Lead-free & RoHS compliant | Meets EU Directive 2015/863/EU; compatible with standard SnAgCu reflow profiles (peak 260°C) |
Applications
| PC Motherboard VRM | LCD Monitor Logic Supply |
|---|---|
Use Scenario: Providing clean 3.3V bias to PCIe slot detection circuits and SMBus controllers. IC Role / Device Role / Timing Role: Primary low-noise post-regulator downstream of main 12V/5V buck converter. Use Value: 75dB ripple rejection prevents SMBus communication errors caused by switching noise coupling. | Use Scenario: Powering timing controller (TCON) and LVDS transmitter ICs in 24-bit RGB panels. IC Role / Device Role / Timing Role: Stable 3.3V reference for pixel clock generation and gamma correction DACs. Use Value: ±1% output accuracy ensures consistent grayscale rendering across operating temperature range. |
| Industrial PLC I/O Module | USB-C Docking Station |
Use Scenario: Supplying isolated CAN transceiver and digital isolator side-rail in fieldbus interface modules. IC Role / Device Role / Timing Role: Local 3.3V regulator for signal-level translation and level-shifting logic. Use Value: Thermal shutdown prevents latch-up during transient overvoltage events on 24V field wiring. | Use Scenario: Delivering regulated 3.3V to USB PD controller, display port alt-mode logic, and embedded MCU. IC Role / Device Role / Timing Role: Secondary LDO for protocol stack management and firmware execution. Use Value: 1.15V dropout allows operation from 5V USB-C VBUS even under cable voltage drop (≥4.45V). |
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 (0.4V typical @ 3A, but 1.3V @ 1A), higher quiescent current (15mA), TO-263 package | Designed for higher-current loads (>1.5A); less suitable for space-constrained SOT-223 layouts | Select when >1.2A continuous output or enhanced thermal performance (θJA = 60°C/W) is required |
| TLV1117-33CDCYR | Lower dropout (1.1V @ 1A), tighter initial accuracy (±1%), same SOT-223 package, but 85°C max TJ | Not rated for industrial temperature range; unsuitable for extended ambient >85°C environments | Select only for commercial-grade applications where cost is prioritized over extended temperature capability |
Compared with MIC29302WU-3.3 and TLV1117-33CDCYR, the AZ1117S-3.3TRE1 uniquely balances industrial temperature rating (–40°C to +125°C), SOT-223 footprint, and guaranteed 1.15V dropout at 1A-making it optimal for thermally demanding embedded designs where board area and reliability are critical.
Availability
AZ1117S-3.3TRE1 is available at Aetrix Electronics and suitable for PC motherboard VRMs, LCD monitor logic supplies, industrial PLC I/O modules, and USB-C docking stations requiring stable component supply with full industrial temperature support.
Supply support for AZ1117S-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 manufacturer of discrete semiconductors and analog ICs, specializing in power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
The AZ1117 series belongs to Diodes' precision linear regulator product line, engineered specifically for post-regulation in space-constrained, thermally demanding applications where low noise, high accuracy, and robust fault protection are mandatory.
FAQ
What is the maximum input voltage for AZ1117S-3.3TRE1?
The absolute maximum input voltage is 20V, but the recommended operating maximum is 15V per datasheet Section 5. Exceeding 15V risks exceeding thermal limits under full load, especially in SOT-223 without heatsinking. For 3.3V output, typical use cases maintain VIN between 4.45V (dropout-limited) and 12V.
Does AZ1117S-3.3TRE1 require an output capacitor, and what type is recommended?
Yes-an output capacitor is mandatory for stability. The datasheet specifies ≥22µF tantalum or ≥10µF low-ESR ceramic. Tantalum provides best PSRR; ceramic requires careful ESR selection (0.1–0.5Ω) to avoid oscillation. No minimum ESR is required for tantalum, simplifying design.
How does thermal shutdown behave during overload conditions?
Thermal shutdown activates at +150°C junction temperature with +25°C hysteresis, meaning the device resumes regulation only after cooling to +125°C. During shutdown, output drops to ~0.5V and quiescent current falls to <1mA. This cycle repeats until fault condition clears, preventing permanent damage.
Can AZ1117S-3.3TRE1 be used in parallel for higher current?
No-parallel operation is not supported. The AZ1117 lacks current-sharing features or matching output impedance. Attempting parallel connection causes unequal current distribution and potential thermal runaway. For >1A, select a higher-current LDO (e.g., AZ2017) or switch to a DC/DC solution.
AZ1117S-3.3TRE1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- AZ1117
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- 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):
- 1.25V @ 1A
- Current - Output:
- 1.25A
- 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-263
AZ1117S-3.3TRE1 FAQ
1.How can I place an order for AZ1117S-3.3TRE1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ1117S-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 AZ1117S-3.3TRE1 reliable?
The price and inventory of AZ1117S-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 AZ1117S-3.3TRE1 is usually 5 days.
3.What payment methods are accepted for AZ1117S-3.3TRE1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ1117S-3.3TRE1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ1117S-3.3TRE1?
AZ1117S-3.3TRE1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ1117S-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 AZ1117S-3.3TRE1?
For technical support, including AZ1117S-3.3TRE1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ1117S-3.3TRE1 requirements.
6.How does Aetrix verify that AZ1117S-3.3TRE1 is sourced from the original manufacturer or authorized distributors?
All AZ1117S-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 AZ1117S-3.3TRE1 meets industry standards.
7.What is the process for return or replacement of AZ1117S-3.3TRE1?
All AZ1117S-3.3TRE1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ1117S-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 AZ1117S-3.3TRE1 part is unused and in its original packaging.
Return procedure for AZ1117S-3.3TRE1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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