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Diodes Incorporated AZ1117IH-1.2TRG1
- Part No.:
- AZ1117IH-1.2TRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
AZ1117IH-1.2TRG1.pdf
- Description:
- IC REG LINEAR 1.2V 1A SOT223
- Quantity:
- Payment:
- Shipping:
Inventory:9,345
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Product details
Overview
AZ1117IH-1.2TRG1 from Diodes Incorporated is a fixed-output 1.2 V low-dropout linear regulator in SOT223 package, delivering up to 1.35 A with ±1.2% output voltage accuracy at 25°C, 70 dB PSRR at 120 Hz, and thermal shutdown protection. It operates across –40°C to +125°C junction temperature and supports USB devices, PC motherboards, and add-on cards requiring stable low-voltage bias.
For engineers reviewing the AZ1117IH-1.2TRG1 datasheet, AZ1117IH-1.2TRG1 pinout, AZ1117IH-1.2TRG1 application, or AZ1117IH-1.2TRG1 equivalent, key selection criteria include dropout voltage (1.2–1.3 V @ 0.8 A), quiescent current (≤6 mA), RMS output noise (0.003% of VOUT), and compatibility with low-ESR ceramic capacitors (≤20 Ω, ≥10 µF).
Technical Context
The AZ1117IH-1.2TRG1 integrates a trimmed bandgap reference and on-chip thermal shutdown circuitry, enabling precise 1.2 V regulation under industrial temperature conditions. Its architecture supports fast transient response and maintains stability with ceramic output capacitors as low as 10 µF and ESR ≤20 Ω.
It features internal current limiting (1.35 A typ), adjustable thermal shutdown activation at +160°C with +16°C hysteresis, and line/load regulation performance of ≤10 mV over input voltage and load current ranges. The device is optimized for low-noise, low-power applications where input-to-output differential voltage is constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2 V ±1.2% (min/max 1.152 V / 1.248 V) ensures stable core/bias rail for low-voltage logic and analog circuits. |
| Dropout Voltage | 1.2–1.3 V @ 0.8 A (SOT223) enables operation with minimal VIN–VOUT margin-critical for battery-powered or multi-rail systems. |
| PSRR | 70 dB @ 120 Hz, 300 mA load provides effective rejection of ripple from upstream switching supplies or noisy DC sources. |
| RMS Output Noise | 0.003% of VOUT (10 Hz–10 kHz) translates to ~360 nV RMS for clean power delivery to RF, ADC, or precision analog stages. |
| Quiescent Current | Max 6 mA at zero load minimizes standby power loss in always-on subsystems such as USB suspend mode or sensor interfaces. |
| Thermal Shutdown | Activates at +160°C junction temperature with +16°C hysteresis, preventing permanent damage during overload or poor heatsinking. |
| Operating Junction Temp | –40°C to +125°C supports deployment in industrial control, automotive under-hood modules, and ruggedized computing. |
Pinout & Package
SOT223 package: 3-pin surface-mount, thermally enhanced plastic case with exposed tab connected to OUTPUT pin for improved heat dissipation. Pin 1 = INPUT, Pin 2 = OUTPUT, Pin 3 = GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (INPUT) | Regulator input supply connection | Accepts 2.4–15 V DC; must be ≥1.2 V + dropout voltage to maintain regulation; requires local 10 µF ceramic decoupling. |
| Pin 2 (OUTPUT) | Regulated 1.2 V output node | Delivers up to 1.35 A; connects to exposed thermal pad for PCB heat spreading; requires ≥10 µF/≤20 Ω ceramic capacitor. |
| Pin 3 (GND) | Reference and return path for internal circuitry | Low-impedance ground return essential for noise immunity and thermal shutdown accuracy; must tie directly to power plane. |
Key Features
| Feature | Design Value |
|---|---|
| Industrial temperature range | –40°C to +125°C operating junction temperature enables use in factory automation, motor drives, and outdoor electronics. |
| Low ESR capacitor compatibility | Stable with ceramic capacitors ≥10 µF and ESR ≤20 Ω-eliminates need for bulk electrolytic, reducing board space and aging concerns. |
| Trimmed bandgap reference | ±1.2% initial output accuracy ensures reliable power sequencing without external calibration in embedded controllers and FPGAs. |
| Integrated thermal protection | Auto-recovery shutdown at +160°C with +16°C hysteresis prevents latch-up during short-circuit or ambient overheating events. |
| Lead-free & RoHS-compliant | Fully compliant with EU RoHS 2/3 and halogen-free (<900 ppm Br/Cl, <1000 ppm Sb), meeting global environmental and automotive sourcing requirements. |
Applications
| USB Devices | Add-on Cards |
|---|---|
|
Use Scenario: Powering USB 2.0 peripheral ICs (e.g., hub controllers, PHY transceivers) from 5 V bus or local 3.3 V rail. IC Role / Device Role / Timing Role: Provides clean, low-noise 1.2 V supply for USB PHY core logic and PLL reference buffers. Use Value: 0.003% RMS noise and 70 dB PSRR suppress switching artifacts from host-side SMPS, preserving signal integrity and eye diagram margins. |
Use Scenario: Generating 1.2 V core voltage for FPGA I/O banks or PCIe endpoint logic on expansion cards. IC Role / Device Role / Timing Role: Low-dropout LDO delivering regulated bias for high-speed interface circuitry with tight voltage tolerance. Use Value: 1.2–1.3 V dropout allows direct derivation from 2.5 V or 3.3 V rails, minimizing power conversion stages and improving system efficiency. |
| DVD Players | PC Motherboards |
|
Use Scenario: Supplying 1.2 V to DVD drive servo controller ASICs and laser diode bias circuits. IC Role / Device Role / Timing Role: Stable low-noise voltage source for analog front-end and digital control logic in consumer optical storage. Use Value: Thermal shutdown and current limit protect against motor stall or lens actuator faults, enhancing field reliability. |
Use Scenario: Providing 1.2 V auxiliary rail for chipset voltage regulators, SMBus controllers, or embedded microcontrollers on ATX boards. IC Role / Device Role / Timing Role: Secondary LDO supporting always-on functions during S3/S4 sleep states with ultra-low quiescent current. Use Value: ≤6 mA IQ extends RTC and management controller uptime during main CPU power-down, reducing battery drain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC29302WU-1.2 | Higher dropout (1.5 V @ 3 A), higher IQ (15 mA), TO263-5 package | Better suited for high-current (>1.5 A), high-thermal-mass designs with heatsink capability | Select when >1.35 A continuous load or higher thermal margin is required; not drop-in due to pinout and footprint mismatch. |
| LP38691SD-1.2 | Lower max current (500 mA), lower noise (25 µV RMS), same SOT223 package | Optimized for ultra-low-noise analog rails (e.g., audio codecs, precision ADCs) with reduced load capacity | Choose for noise-sensitive sub-systems where 500 mA suffices; verify thermal derating at full load in compact layouts. |
Compared with MIC29302WU-1.2 and LP38691SD-1.2, the AZ1117IH-1.2TRG1 delivers optimal balance of current capability (1.35 A), low noise (360 nV RMS), and industrial temperature support in standard SOT223-making it ideal for cost-sensitive, medium-power embedded applications requiring proven reliability.
Availability
AZ1117IH-1.2TRG1 is available at Aetrix Electronics and suitable for USB devices, PC motherboards, and add-on cards requiring stable component supply across industrial temperature environments and long production lifecycles.
Supply support for AZ1117IH-1.2TRG1 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 manufacturer specializing in discrete, analog, and mixed-signal solutions for industrial, computing, and consumer markets.
The AZ1117I series targets industrial-grade power management, delivering robust LDO performance with extended temperature range, thermal safety, and RoHS/Green compliance for mission-critical embedded systems.
FAQ
What is the minimum input voltage required for regulation at 1.2 V output?
The AZ1117IH-1.2TRG1 requires VIN ≥ VOUT + dropout voltage. With typical dropout of 1.2 V at 0.8 A, minimum input is 2.4 V. At full 1.35 A load, dropout rises to 1.3 V, so VIN ≥ 2.5 V ensures regulation across all conditions per datasheet limits.
Can this regulator operate with a 10 µF ceramic output capacitor only?
Yes-the device is explicitly characterized for stability with ≥10 µF ceramic capacitors having ESR ≤20 Ω. No additional bulk capacitance is needed, simplifying layout and eliminating electrolytic aging concerns in long-life applications.
Is the SOT223 package thermally adequate for 1.35 A continuous operation?
In still air without heatsink, SOT223 has θJA = 125°C/W. At 1.35 A and 2.5 V dropout (3.375 W dissipation), junction rise exceeds safe limits. Derating to ≤800 mA or adding copper pour/heatsink is required for full-load continuous operation per thermal resistance data.
Does the 1.2 V version include internal feedback resistors?
Yes-the AZ1117IH-1.2TRG1 is a fixed-output variant with integrated resistor divider. Pin 3 is GND (not ADJ), eliminating external components. This differs from the ADJ version (AZ1117IH-ADJTRG1), which uses Pins 2 and 3 as OUTPUT and ADJ respectively.
AZ1117IH-1.2TRG1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- AZ1117I
- 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):
- 1.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.3V @ 800mA
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 6 mA
- Current - Supply (Max):
- -
- PSRR:
- 70dB (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
AZ1117IH-1.2TRG1 FAQ
1.How can I place an order for AZ1117IH-1.2TRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ1117IH-1.2TRG1 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 AZ1117IH-1.2TRG1 reliable?
The price and inventory of AZ1117IH-1.2TRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ1117IH-1.2TRG1 is usually 5 days.
3.What payment methods are accepted for AZ1117IH-1.2TRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ1117IH-1.2TRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ1117IH-1.2TRG1?
AZ1117IH-1.2TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ1117IH-1.2TRG1 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 AZ1117IH-1.2TRG1?
For technical support, including AZ1117IH-1.2TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ1117IH-1.2TRG1 requirements.
6.How does Aetrix verify that AZ1117IH-1.2TRG1 is sourced from the original manufacturer or authorized distributors?
All AZ1117IH-1.2TRG1 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 AZ1117IH-1.2TRG1 meets industry standards.
7.What is the process for return or replacement of AZ1117IH-1.2TRG1?
All AZ1117IH-1.2TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ1117IH-1.2TRG1, 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 AZ1117IH-1.2TRG1 part is unused and in its original packaging.
Return procedure for AZ1117IH-1.2TRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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