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Diodes Incorporated AZ1117H-1.8TRG1
- Part No.:
- AZ1117H-1.8TRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
AZ1117H-1.8TRG1.pdf
- Description:
- IC REG LINEAR 1.8V 1A SOT223
- Quantity:
- Payment:
- Shipping:
Inventory:3,936
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Product details
Overview
AZ1117H-1.8TRG1 from BCD Semiconductor Manufacturing Limited is a fixed-output 1.8 V, 1 A low-dropout linear regulator in SOT-223 package, featuring 1.15 V dropout at full load, ±1% output voltage accuracy, and integrated thermal shutdown and current limiting. It delivers stable power to core logic rails in space-constrained embedded systems such as graphics cards and network interface controllers.
For engineers reviewing the AZ1117H-1.8TRG1 datasheet, AZ1117H-1.8TRG1 pinout, AZ1117H-1.8TRG1 application, or AZ1117H-1.8TRG1 equivalent, this page provides verified technical context, validated pin functions, confirmed operating junction temperature (–40°C to +125°C), real-world load regulation performance (≤10 mV), and direct alternatives with documented electrical and packaging differences.
Technical Context
The AZ1117H-1.8TRG1 uses a trimmed bandgap reference to maintain 1.8 V output within ±1% tolerance across –40°C to +125°C junction temperature. Its internal PNP pass transistor enables low dropout operation, with 1.15 V typical drop at 1 A output current and 1.25–1.35 A current limit.
Thermal protection activates at 150°C junction temperature with 25°C hysteresis, and quiescent current remains 5–10 mA across input-to-output differentials from 1.25 V to 8 V. Ripple rejection reaches 60–75 dB at 120 Hz with 22 µF tantalum output capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8 V ±1% - ensures reliable powering of 1.8 V I/O and core supplies in FPGAs and ASICs |
| Maximum Output Current | 1 A - supports single-rail supply for mid-power digital subsystems without external boost |
| Dropout Voltage | 1.15 V at 1 A - enables operation from 2.95 V input, compatible with 3.3 V rail derating |
| Line Regulation | ≤6 mV - maintains output stability despite ±10% input variation under fixed-load conditions |
| Load Regulation | ≤10 mV - limits output deviation when load steps from 10 mA to 1 A |
| Thermal Shutdown Threshold | 150°C junction - protects die during sustained overload or poor PCB heatsinking |
| Ripple Rejection | 60–75 dB at 120 Hz - suppresses switching noise from upstream DC/DC converters |
Pinout & Package
SOT-223 package (3-pin, surface-mount) with exposed thermal pad; footprint compatible with JEDEC MO-178AB standard; thermal resistance θJA = 120°C/W without heatsink.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (INPUT) | Input voltage supply connection | Accepts 3.2–20 V DC input; requires ≥10 µF ceramic or tantalum input capacitor for stability |
| 2 (OUTPUT) | Regulated 1.8 V output terminal | Delivers up to 1 A; requires ≥22 µF low-ESR output capacitor for transient response and PSRR |
| 3 (GND) | Ground reference and thermal path | Common return for input/output; soldered thermal pad must connect to large copper pour for thermal management |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout voltage | 1.15 V at 1 A enables use with marginally regulated inputs (e.g., buck converter outputs near 3.0 V) |
| Output voltage accuracy | ±1% over temperature and line/load ensures compliance with tight 1.8 V FPGA I/O specs |
| Integrated protection | Current limit (1.25–1.35 A) and thermal shutdown (150°C/125°C hysteresis) eliminate need for external fault circuitry |
| Stable with low-ESR capacitors | Compatible with 10–22 µF tantalum or ceramic output caps - simplifies layout vs. older LDOs requiring >47 µF |
Applications
| PC Motherboard Power | Graphics Card Core Rail |
|---|---|
Use Scenario: Providing clean 1.8 V supply to DDR2/DDR3 memory termination and chipset I/O buffers on ATX motherboards. IC Role / Device Role / Timing Role: Fixed-output LDO delivering regulated bias for high-speed parallel bus interfaces. Use Value: Low dropout preserves headroom from 3.3 V rail; ±1% accuracy prevents signal integrity violations at 800+ MT/s data rates. |
Use Scenario: Powering GPU core logic and display interface circuitry in discrete PCIe graphics cards. IC Role / Device Role / Timing Role: Primary 1.8 V rail generator for video processing units and TMDS transmitters. Use Value: 1 A capability supports burst-mode GPU loads; 75 dB ripple rejection minimizes clock jitter in HDMI/DVI PHYs. |
| NIC/Switch Interface | ADSL Modem Line Card |
Use Scenario: Supplying 1.8 V to Ethernet PHYs and switch fabric controllers in managed Layer 2 switches. IC Role / Device Role / Timing Role: Local point-of-load regulator for MII/RMII physical layer devices. Use Value: Stable output under dynamic packet traffic loads prevents PHY link flapping; thermal shutdown guards against airflow failure. |
Use Scenario: Generating 1.8 V for DSLAM line card microcontrollers and analog front-end ICs in residential ADSL modems. IC Role / Device Role / Timing Role: Secondary low-noise regulator downstream of primary 5 V or 3.3 V DC/DC stage. Use Value: 0.003% RMS output noise avoids interference with sensitive analog receive paths; wide –40°C to +125°C range supports unventilated enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC29302WU-1.8 | TO-263-3 package; higher 1.5 A rating; 0.4 V dropout at 1 A; 30 µA quiescent current | Better thermal performance (θJA = 60°C/W) but larger footprint; suited for higher ambient temp environments | Select when board space allows TO-263 and thermal margin is critical; not drop-in due to pinout mismatch |
| LD1117S18TR | SOT-223 package; same 1.8 V/1 A spec; 1.1 V dropout at 1 A; ±2% initial accuracy; STMicroelectronics origin | Lower cost but wider output tolerance; identical pinout and footprint enables direct replacement if ±2% is acceptable | Choose for cost-sensitive designs where 1.8 V ±2% meets system-level margin requirements |
Compared with MIC29302WU-1.8, AZ1117H-1.8TRG1 offers tighter voltage accuracy and lower cost in SOT-223, while LD1117S18TR provides identical form factor with relaxed tolerance-enabling trade-offs between precision, thermal headroom, and BOM cost.
Availability
AZ1117H-1.8TRG1 is available at Aetrix Electronics and suitable for PC motherboard power delivery, graphics card core rails, NIC/Switch interface regulation, and ADSL modem line card applications requiring stable component supply across industrial temperature ranges.
Supply support for AZ1117H-1.8TRG1 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
BCD Semiconductor Manufacturing Limited is a China-based fabless analog IC designer specializing in power management, LED drivers, and automotive-grade regulators since 2003.
The AZ1117 series was developed for cost-sensitive, high-volume embedded systems requiring robust fixed-output LDOs with guaranteed thermal and current protection - targeting computing, networking, and consumer peripheral markets.
FAQ
What is the minimum input voltage required for AZ1117H-1.8TRG1 to regulate at full 1 A load?
The minimum input voltage is calculated as VOUT + VDROP(max) = 1.8 V + 1.25 V = 3.05 V. Per datasheet conditions, 3.2 V is specified as minimum for 10 mA ≤ IOUT ≤ 1 A operation. Below 3.2 V, dropout behavior begins and output voltage drops linearly with input.
Can AZ1117H-1.8TRG1 be used with ceramic output capacitors?
Yes - the device is stable with 10–22 µF ceramic capacitors having ESR ≥ 0.1 Ω. Unlike older LDOs, it does not require high-ESR tantalum or aluminum electrolytic types. X5R/X7R dielectrics are recommended for temperature stability.
Does AZ1117H-1.8TRG1 require an input bypass capacitor?
Yes - a minimum 10 µF low-ESR capacitor (ceramic or tantalum) is required at the INPUT pin to prevent oscillation and improve transient response. Placement within 5 mm of the device and direct connection to GND via short trace is mandatory for stability.
How does thermal shutdown behave during continuous overload?
When junction temperature reaches 150°C, the regulator shuts down output and holds off until temperature falls by 25°C (to ~125°C), then auto-restarts. This hiccup mode prevents permanent damage but causes output interruption - external current limiting is advised for sustained overload scenarios.
AZ1117H-1.8TRG1 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):
- 1.8V
- 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-1.8TRG1 FAQ
1.How can I place an order for AZ1117H-1.8TRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ1117H-1.8TRG1 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-1.8TRG1 reliable?
The price and inventory of AZ1117H-1.8TRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ1117H-1.8TRG1 is usually 5 days.
3.What payment methods are accepted for AZ1117H-1.8TRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ1117H-1.8TRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ1117H-1.8TRG1?
AZ1117H-1.8TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ1117H-1.8TRG1 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-1.8TRG1?
For technical support, including AZ1117H-1.8TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ1117H-1.8TRG1 requirements.
6.How does Aetrix verify that AZ1117H-1.8TRG1 is sourced from the original manufacturer or authorized distributors?
All AZ1117H-1.8TRG1 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-1.8TRG1 meets industry standards.
7.What is the process for return or replacement of AZ1117H-1.8TRG1?
All AZ1117H-1.8TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ1117H-1.8TRG1, 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-1.8TRG1 part is unused and in its original packaging.
Return procedure for AZ1117H-1.8TRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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