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Diodes Incorporated AZ1117R-1.2TRE1
- Part No.:
- AZ1117R-1.2TRE1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-243AA
- Datasheet:
-
AZ1117R-1.2TRE1.pdf
- Description:
- IC REG LINEAR 1.2V 1.25A SOT89
- Quantity:
- Payment:
- Shipping:
Inventory:2,386
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Product details
Overview
AZ1117R-1.2TRE1 from Diodes Incorporated is a fixed-output 1.2 V, 1 A low-dropout linear regulator in SOT89 package, featuring 1.15 V dropout at full load, ±2% output voltage accuracy, and integrated thermal shutdown and current limiting. It delivers stable bias for low-voltage logic rails in space-constrained embedded power supplies.
For engineers reviewing the AZ1117R-1.2TRE1 datasheet, AZ1117R-1.2TRE1 pinout, AZ1117R-1.2TRE1 application, or AZ1117R-1.2TRE1 equivalent, key selection criteria include dropout voltage at 1 A, thermal resistance in SOT89, load regulation under 10 mV, quiescent current below 10 mA, and RoHS-compliant lead-free packaging.
Technical Context
The AZ1117R-1.2TRE1 uses a trimmed bandgap reference to maintain 1.2 V output within ±2% over temperature and load. Its internal current limit is factory-trimmed to 1.25–1.35 A, ensuring consistent short-circuit protection without external components.
Thermal shutdown activates at +150 °C junction temperature with +25 °C hysteresis, and the device operates across –40 °C to +125 °C ambient. Input voltage range is 3.0 V to 10 V, supporting common intermediate bus voltages feeding 1.2 V core logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.2 V ±2% (guaranteed over 10 mA–1 A load and –40 °C to +125 °C) |
| Dropout Voltage | 1.15 V at 1 A (enables operation from 3.0 V input to deliver 1.2 V output) |
| Load Regulation | ≤10 mV (ensures <0.83% output deviation from 10 mA to 1 A load) |
| Quiescent Current | 5–10 mA (minimizes no-load power loss in always-on subsystems) |
| Ripple Rejection | 60–75 dB at 120 Hz (suppresses upstream switching noise in mixed-signal rails) |
| Thermal Shutdown | Triggers at +150 °C junction, +25 °C hysteresis (prevents permanent damage during overload) |
| Package | SOT89 (3-pin, surface-mount, θJA = 165 °C/W, footprint compatible with legacy designs) |
Pinout & Package
SOT89 package: 3-pin, single-ended, surface-mount plastic package with exposed thermal pad (pin 2 is input, pin 3 is ground, pin 1 is output). Thermal resistance θJA = 165 °C/W without heatsink.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Regulated Output | Delivers stable 1.2 V to load; requires ≥10 µF ceramic or tantalum output capacitor for stability |
| 2 (IN) | Input Supply | Accepts 3.0–10 V DC; must be decoupled with ≥1 µF capacitor near pin |
| 3 (GND) | Ground Reference | Common return path for input, output, and internal circuitry; connects to thermal pad for heat dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout voltage | 1.15 V at 1 A enables use with 3.3 V or 5 V input rails to generate 1.2 V efficiently |
| Factory-trimmed current limit | 1.25–1.35 A ensures predictable short-circuit behavior without external sensing |
| On-chip thermal shutdown | +150 °C activation with +25 °C hysteresis provides autonomous fault recovery in sealed enclosures |
| ±2% output accuracy | Meets tight tolerance requirements for FPGA core voltage and microcontroller I/O rails |
| Lead-free & RoHS compliant | Fully compliant with EU Directive 2015/863/EU; no intentionally added lead or halogens |
Applications
| PC Motherboard VRM Auxiliary Rail | LCD Monitor Logic Supply |
|---|---|
Use Scenario: Powers 1.2 V I/O banks of southbridge or embedded controller on ATX motherboard. IC Role / Device Role / Timing Role: Fixed-output LDO providing clean, low-noise supply independent of main CPU VRM. Use Value: 10 mV load regulation ensures signal integrity across varying USB/peripheral activity; SOT89 footprint saves board area near dense BGA components. | Use Scenario: Supplies 1.2 V logic for timing controller and interface ICs in 24-bit RGB LCD panels. IC Role / Device Role / Timing Role: Local point-of-load regulator decoupling display driver ICs from noisy DC-DC converters. Use Value: 75 dB ripple rejection suppresses 120 Hz artifacts from AC-DC front-end; thermal shutdown prevents latch-up during panel hot-plug events. |
| Graphic Card Memory Interface | ADSL Modem PHY Core |
Use Scenario: Delivers 1.2 V to GDDR6 memory termination and level-shift circuits on PCIe add-in cards. IC Role / Device Role / Timing Role: Low-noise bias source for high-speed data lanes requiring sub-10 mV rail deviation. Use Value: 0.003% RMS output noise minimizes jitter in memory clock distribution; 1.15 V dropout allows direct regulation from 3.3 V auxiliary rail. | Use Scenario: Powers 1.2 V analog front-end and DSP core in residential DSL line cards. IC Role / Device Role / Timing Role: Isolated low-power supply for sensitive analog sections, separated from digital switching noise. Use Value: 60 dB PSRR at 120 Hz rejects transformer-coupled mains interference; –40 °C to +125 °C rating supports unventilated indoor deployment. |
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 |
|---|---|---|---|
| MIC29152-1.2WT | Higher dropout (1.4 V at 1.5 A), TO220-3 package, 0.5% initial accuracy | Requires larger PCB area and heatsinking; better for high-ambient industrial environments | Select when tighter initial accuracy and higher thermal mass are prioritized over footprint size |
| AP2112K-1.2TRG1 | Lower quiescent current (60 µA), SOT23-5 package, 1.5% accuracy, 0.6 V dropout at 600 mA | Not rated for 1 A continuous; suited for ultra-low-power standby rails, not main logic supplies | Choose only for sub-600 mA loads where sleep-mode current dominates system budget |
Compared with MIC29152-1.2WT and AP2112K-1.2TRG1, the AZ1117R-1.2TRE1 uniquely balances 1 A capability, SOT89 compactness, and ±2% accuracy-making it optimal for cost-sensitive, space-constrained 1.2 V logic rails where thermal management is feasible via PCB copper pour.
Availability
AZ1117R-1.2TRE1 is available at Aetrix Electronics and suitable for PC motherboard auxiliary rails, LCD monitor logic supplies, graphic card memory interfaces, and ADSL modem PHY cores requiring stable component supply and long-term production continuity.
Supply support for AZ1117R-1.2TRE1 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 ICs, with emphasis on power management, signal integrity, and connectivity solutions.
The AZ1117 series targets cost-effective, robust linear regulation for consumer and computing applications-designed to replace older 78xx-style regulators with lower dropout, tighter accuracy, and integrated protection.
FAQ
What is the maximum input voltage for AZ1117R-1.2TRE1?
The absolute maximum input voltage is 20 V, but the recommended operating maximum is 10 V per the datasheet's Electrical Characteristics table. Exceeding 10 V risks exceeding safe power dissipation limits in the SOT89 package, especially at high ambient temperatures or full 1 A load.
Does AZ1117R-1.2TRE1 require an external capacitor on the output pin?
Yes-a minimum 10 µF output capacitor (tantalum or ceramic) is required for stability and transient response. The datasheet specifies 22 µF tantalum in typical applications; using less than 10 µF may cause oscillation or poor load-step recovery.
Is AZ1117R-1.2TRE1 pin-compatible with other AZ1117 variants in SOT89?
Yes-all SOT89-packaged AZ1117 variants (e.g., AZ1117R-3.3TRE1, AZ1117R-ADJTRE1) share identical pinout: Pin 1 = OUT, Pin 2 = IN, Pin 3 = GND. However, the adjustable version requires two external resistors and has different feedback behavior.
What is the thermal resistance (θJA) of AZ1117R-1.2TRE1 in SOT89?
The junction-to-ambient thermal resistance is 165 °C/W for the SOT89 package with standard JEDEC 2-layer board layout (1 in² copper pad). This value assumes no external heatsink; adding thermal vias or larger copper pours can reduce effective θJA by up to 30%.
AZ1117R-1.2TRE1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- AZ1117
- Package/Case:
- TO-243AA
- 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):
- 1.2V
- 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:
- SOT-89-3
AZ1117R-1.2TRE1 FAQ
1.How can I place an order for AZ1117R-1.2TRE1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ1117R-1.2TRE1 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 AZ1117R-1.2TRE1 reliable?
The price and inventory of AZ1117R-1.2TRE1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ1117R-1.2TRE1 is usually 5 days.
3.What payment methods are accepted for AZ1117R-1.2TRE1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ1117R-1.2TRE1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ1117R-1.2TRE1?
AZ1117R-1.2TRE1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ1117R-1.2TRE1 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 AZ1117R-1.2TRE1?
For technical support, including AZ1117R-1.2TRE1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ1117R-1.2TRE1 requirements.
6.How does Aetrix verify that AZ1117R-1.2TRE1 is sourced from the original manufacturer or authorized distributors?
All AZ1117R-1.2TRE1 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 AZ1117R-1.2TRE1 meets industry standards.
7.What is the process for return or replacement of AZ1117R-1.2TRE1?
All AZ1117R-1.2TRE1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ1117R-1.2TRE1, 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 AZ1117R-1.2TRE1 part is unused and in its original packaging.
Return procedure for AZ1117R-1.2TRE1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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