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Diodes Incorporated AZ1117H-3.3TRG1
- Part No.:
- AZ1117H-3.3TRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
AZ1117H-3.3TRG1.pdf
- Description:
- IC REG LINEAR 3.3V 1A SOT223
- Quantity:
- Payment:
- Shipping:
Inventory:17,890
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Product details
Overview
AZ1117H-3.3TRG1 from Diodes Incorporated is a fixed-output 3.3V, 1A low-dropout linear regulator in SOT223 package, delivering ±1% output voltage accuracy at 25°C, 1.15V dropout at full load, and integrated thermal shutdown and current limiting. It serves as a primary post-regulation supply for microcontroller core logic, DDR memory termination, and USB PHY power rails in embedded computing systems.
For engineers reviewing the AZ1117H-3.3TRG1 datasheet, AZ1117H-3.3TRG1 pinout, AZ1117H-3.3TRG1 application, or AZ1117H-3.3TRG1 equivalent, key selection criteria include dropout voltage at 1A, thermal resistance (θJA = 120°C/W), output voltage tolerance over temperature, PSRR at 120Hz, and minimum load current requirement in fixed-voltage configuration.
Technical Context
The AZ1117H-3.3TRG1 implements a bandgap-referenced error amplifier with internal current-limiting circuitry and thermal foldback protection. Its trimmed reference ensures 3.3V output remains within ±1% across -40°C to +125°C junction temperature range under 10mA–1A load conditions.
It operates with input voltages up to 15V and requires only two external capacitors: ≥10µF input and ≥22µF output (tantalum or ceramic). Dropout behavior is characterized at ∆VOUT = 1%, with 1.15V typical at IOUT = 1A and TJ = 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3V ±1% (10mA–1A, -40°C to +125°C); enables stable MCU I/O and peripheral rail without external feedback. |
| Dropout Voltage | 1.15V at 1A (TJ = 25°C); supports operation from 4.45V input, critical for single-cell Li-ion or 5V bus post-regulation. |
| Load Regulation | ≤10mV (10mA → 1A); maintains tight voltage control during dynamic CPU load transitions. |
| Ripple Rejection | 75dB at 120Hz (COUT = 22µF tantalum); suppresses switching noise from upstream DC/DC converters. |
| Quiescent Current | 5–10mA (VIN = VOUT + 1.25V); minimizes no-load power loss in always-on subsystems. |
| Thermal Shutdown | Activates at +150°C junction temperature with +25°C hysteresis; prevents permanent damage during sustained overload. |
| Package | SOT223; surface-mount, thermally enhanced 3-pin package with θJA = 120°C/W (no heatsink). |
Pinout & Package
SOT223 package: 3-pin surface-mount device with exposed thermal pad (pin 2 connected to GND internally in fixed versions). Pin 1 = OUTPUT, Pin 2 = GND, Pin 3 = INPUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | OUTPUT | Regulated 3.3V output node; requires ≥22µF low-ESR capacitor for stability and transient response. |
| Pin 2 | GND | Power ground reference and thermal conduction path; must be connected to large PCB copper area for heat dissipation. |
| Pin 3 | INPUT | Unregulated input (up to 15V); requires ≥10µF bypass capacitor placed adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout | 1.15V at 1A enables use with 5V bus or single-cell battery inputs while maintaining regulation margin. |
| Trimmed output accuracy | ±1% over temperature and load ensures reliable operation of 3.3V-tolerant interfaces (SPI, UART, SDIO) without calibration. |
| Integrated protection | Current limit (1.25–1.35A) and thermal shutdown prevent failure during short-circuit or high-ambient conditions. |
| Lead-free & RoHS compliant | Fully compliant with EU RoHS 2015/863/EU; suitable for consumer, industrial, and networking equipment. |
| Wide operating range | -40°C to +125°C junction temperature supports deployment in automotive cabin, industrial PLC, and telecom base station environments. |
Applications
| PC Motherboard Power | LCD Monitor Logic Supply |
|---|---|
|
Use Scenario: Providing clean 3.3V rail for southbridge I/O, SMBus controllers, and BIOS flash memory on ATX motherboards. IC Role / Device Role / Timing Role: Primary linear post-regulator converting 5V standby or main rail to precision 3.3V. Use Value: Low noise and high PSRR ensure signal integrity for high-speed digital interfaces without adding filtering complexity. |
Use Scenario: Powering timing controller (TCON), LVDS transmitter, and microcontroller in 1080p LCD panels. IC Role / Device Role / Timing Role: Stable 3.3V source for display interface logic requiring <±2% voltage tolerance. Use Value: 1.15V dropout allows direct derivation from 5V panel supply, reducing bill-of-materials vs. buck converter solution. |
| Graphic Card VRM Auxiliary Rail | ADSL Modem PHY Supply |
|
Use Scenario: Delivering 3.3V to PCIe slot detection circuitry, hot-plug controllers, and auxiliary logic on discrete GPUs. IC Role / Device Role / Timing Role: Secondary regulated supply independent of GPU core VRM, ensuring robust enumeration under thermal stress. Use Value: Thermal shutdown hysteresis (+25°C) prevents oscillation during GPU thermal throttling events. |
Use Scenario: Supplying 3.3V to ADSL line driver ICs, DSPs, and Ethernet PHYs in residential gateways. IC Role / Device Role / Timing Role: Low-noise analog/RF domain supply decoupled from noisy digital switching sections. Use Value: 0.003% RMS output noise minimizes jitter in DSL line clock recovery and data conversion stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC29302WU-3.3 | Higher dropout (0.4V typ. @ 3A), higher quiescent current (15mA), TO263-5 package. | Better suited for high-current (>1.5A), low-thermal-resistance designs where board space permits larger package. | Select when >1A continuous load or lower θJA (<60°C/W) is required; not drop-in due to pinout and footprint mismatch. |
| AP2202K-3.3 | Lower current rating (300mA), smaller SOT23-5 package, no thermal shutdown, ±2% accuracy. | Targeted at ultra-low-power sensor nodes or auxiliary rails where size and cost outweigh performance needs. | Choose only for sub-300mA loads with relaxed accuracy and safety requirements; incompatible for 1A replacement. |
Compared with MIC29302WU-3.3 and AP2202K-3.3, the AZ1117H-3.3TRG1 delivers optimal balance of 1A capability, ±1% accuracy, and SOT223 thermal performance-making it preferred for mid-power embedded systems where reliability and proven field history matter.
Availability
AZ1117H-3.3TRG1 is available at Aetrix Electronics and suitable for PC motherboard power delivery, LCD monitor logic supplies, and ADSL modem PHY rails requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for AZ1117H-3.3TRG1 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., and manufacturing in China, Taiwan, and Thailand.
The AZ1117 series belongs to Diodes' precision linear regulator product line, engineered for cost-sensitive, high-volume applications demanding reliability, thermal robustness, and compatibility with standard PCB assembly processes.
FAQ
What is the maximum input voltage for AZ1117H-3.3TRG1?
The absolute maximum input voltage is 20V, but the recommended operating maximum is 15V per the datasheet's Recommended Operating Conditions table. Exceeding 15V risks exceeding safe power dissipation limits in SOT223, especially above 25°C ambient, and may trigger thermal shutdown prematurely.
Does AZ1117H-3.3TRG1 require an external capacitor on the ADJ pin?
No - the AZ1117H-3.3TRG1 is a fixed-output variant; the ADJ pin is internally connected to GND and not accessible externally. Only input (≥10µF) and output (≥22µF) capacitors are required, with low ESR values recommended for stability and transient response.
Can AZ1117H-3.3TRG1 be used in parallel for higher current?
No - the AZ1117H-3.3TRG1 lacks built-in current-sharing features or master-slave control. Parallel connection without external ballast resistors causes unequal current distribution and potential thermal runaway; Diodes does not recommend or characterize this configuration.
Is AZ1117H-3.3TRG1 suitable for automotive applications?
Yes - it is qualified for operation from -40°C to +125°C junction temperature and meets AEC-Q100 stress test requirements for temperature cycling and HTOL when used within its specified electrical limits. However, system-level qualification (e.g., ISO 16750) remains the responsibility of the end designer.
AZ1117H-3.3TRG1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- AZ1117
- Package/Case:
- TO-261-4, TO-261AA
- 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:
- SOT-223-3
AZ1117H-3.3TRG1 FAQ
1.How can I place an order for AZ1117H-3.3TRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ1117H-3.3TRG1 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 AZ1117H-3.3TRG1 reliable?
The price and inventory of AZ1117H-3.3TRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ1117H-3.3TRG1 is usually 5 days.
3.What payment methods are accepted for AZ1117H-3.3TRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ1117H-3.3TRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ1117H-3.3TRG1?
AZ1117H-3.3TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ1117H-3.3TRG1 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 AZ1117H-3.3TRG1?
For technical support, including AZ1117H-3.3TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ1117H-3.3TRG1 requirements.
6.How does Aetrix verify that AZ1117H-3.3TRG1 is sourced from the original manufacturer or authorized distributors?
All AZ1117H-3.3TRG1 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 AZ1117H-3.3TRG1 meets industry standards.
7.What is the process for return or replacement of AZ1117H-3.3TRG1?
All AZ1117H-3.3TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ1117H-3.3TRG1, 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 AZ1117H-3.3TRG1 part is unused and in its original packaging.
Return procedure for AZ1117H-3.3TRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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