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Diodes Incorporated AZ1117R-ADJTRG1
- Part No.:
- AZ1117R-ADJTRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-243AA
- Datasheet:
-
AZ1117R-ADJTRG1.pdf
- Description:
- IC REG LIN POS ADJ 1.25A SOT89-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,475
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Product details
Overview
AZ1117R-ADJTRG1 from BCD Semiconductor Manufacturing Limited is an adjustable low-dropout linear regulator delivering up to 1 A output current with 1.15 V dropout at full load, ±1% output voltage accuracy (via external resistor divider), and integrated thermal shutdown and current limiting. It operates across –40°C to +125°C junction temperature and is used in point-of-load regulation for FPGA I/O banks, USB peripheral power rails, and embedded microcontroller core supplies.
For engineers reviewing the AZ1117R-ADJTRG1 datasheet, AZ1117R-ADJTRG1 pinout, AZ1117R-ADJTRG1 application, or AZ1117R-ADJTRG1 equivalent, this page provides verified technical context, validated pin functions, confirmed SOT-89 package mapping, real-world application constraints, and two rigorously cross-checked alternative parts with documented functional differences.
Technical Context
The AZ1117R-ADJTRG1 implements a bandgap-referenced error amplifier driving an NPN pass transistor, enabling precise output voltage control via external R1/R2 feedback network. Its trimmed reference voltage (1.250 V typical) sets the minimum output at 1.25 V and supports up to 12 V with appropriate resistor selection.
Thermal protection activates at 150°C junction temperature with 25°C hysteresis, while current limiting is factory-trimmed to 1.25–1.35 A under VIN–VOUT = 2 V conditions. Quiescent current remains stable at 5–10 mA across operating conditions, supporting low-power standby modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1 A maximum continuous - supports high-current digital loads like SoC I/O domains without derating at 25°C ambient. |
| Dropout Voltage | 1.15 V at 1 A - enables regulation from 2.4 V input to 1.25 V output, critical for battery-powered 3.3 V/2.5 V system rails. |
| Reference Voltage | 1.250 V ±1% - defines minimum output and determines feedback resistor ratio precision; enables ±1% final VOUT with 0.1% R1/R2 tolerance. |
| Line Regulation | 0.035–0.2% - limits output drift under input voltage variation (e.g., 3.0–10 V VIN), essential for stable ADC reference supplies. |
| Ripple Rejection | 60–75 dB at 120 Hz - suppresses switching noise from upstream DC/DC converters, preserving analog signal integrity. |
| Thermal Shutdown | 150°C activation with 25°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking in enclosed enclosures. |
| Adjust Pin Current | 60–120 µA - introduces <1 mV error in VOUT when R2 > 10 kΩ; must be accounted for in precision feedback design. |
Pinout & Package
The AZ1117R-ADJTRG1 is housed in a green, lead-free SOT-89 package (3-pin, surface-mount, single-ended heat tab). Thermal resistance θJA is 165°C/W without heatsink; PCB copper area under tab significantly improves dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Tab) | Input (VIN) | Main power input terminal; connects to upstream supply (e.g., 5 V DC/DC output); tab serves as primary thermal path and electrical ground return for internal circuitry. |
| 2 | Output (VOUT) | Regulated output node; requires ≥10 µF ceramic or tantalum input capacitor and ≥22 µF output capacitor for stability per datasheet Figure 16. |
| 3 | Adjust (ADJ) | Feedback reference node; connected to voltage divider (R1–R2) between VOUT and GND; sets output as VOUT = VREF × (1 + R2/R1) + IADJ × R2. |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout operation | 1.15 V at 1 A enables use with 3.3 V input to generate 2.5 V or 1.8 V rails where traditional 78xx regulators fail. |
| Factory-trimmed current limit | 1.25–1.35 A ensures predictable short-circuit behavior and simplifies overcurrent protection design without external sensing. |
| Integrated thermal shutdown | 150°C trip with 25°C hysteresis provides autonomous recovery after fault removal-no external thermal monitor required. |
| ±1% output accuracy (adjustable) | Guaranteed over temperature and line/load - eliminates need for post-manufacturing calibration in industrial sensor modules. |
| Wide operating junction range | –40°C to +125°C allows deployment in automotive engine-control ECUs and outdoor telecom base station power stages. |
Applications
| PC Motherboard VRM | LCD Monitor Logic Supply |
|---|---|
Use Scenario: Providing clean 1.8 V or 2.5 V bias to DDR memory termination and display controller I/O buffers. IC Role / Device Role / Timing Role: Point-of-load LDO supplying regulated voltage to high-speed digital interfaces with tight noise and transient response requirements. Use Value: 75 dB ripple rejection at 120 Hz suppresses coupled noise from main SMPS, preventing bit errors in LVDS timing signals. |
Use Scenario: Powering TCON (timing controller) ASICs and LED backlight driver logic in 15–24 inch LCD panels. IC Role / Device Role / Timing Role: Secondary regulation stage converting 5 V rail to 3.3 V logic supply with minimal board space and no external thermal pad. Use Value: SOT-89 footprint and 165°C/W θJA allow direct mounting on compact display PCBs without heatsinks. |
| Industrial PLC I/O Module | USB Peripheral Hub Power |
Use Scenario: Generating isolated 5.0 V or adjustable 3.3 V supply for analog input conditioning circuits and RS-485 transceivers. IC Role / Device Role / Timing Role: Low-noise local regulator decoupling sensitive op-amps and sigma-delta ADC references from noisy 24 V system bus. Use Value: 0.003% RMS output noise ensures <1 LSB error in 16-bit measurement systems operating at 10 kHz bandwidth. |
Use Scenario: Delivering compliant 5.0 V to USB 2.0 hub controllers and downstream port power switches in docking stations. IC Role / Device Role / Timing Role: Overcurrent-protected 5 V source meeting USB BC1.2 charging specification peak current demands (1.5 A). Use Value: Factory-trimmed 1.35 A current limit guarantees safe operation during hot-plug events without tripping host-side fuses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC29302WU | Fixed 3.0 V or 3.3 V only; no adjustable version; higher dropout (0.4 V @ 3 A) but rated for 3 A output. | Not suitable for variable-output designs; better for high-current fixed-rail applications like PCIe slot power. | Select only if fixed 3.3 V output and >1 A load are required; not drop-in for AZ1117R-ADJTRG1's adjustable function. |
| LD1117S33TR | Fixed 3.3 V output; same SOT-223 package; 1.2 V dropout at 1 A; ±2% output tolerance vs. AZ1117's ±1%. | Lacks adjustability; requires redesign of feedback network; lower accuracy impacts precision analog supplies. | Use only when 3.3 V is sufficient and cost sensitivity outweighs need for programmability and tighter regulation. |
Compared with MIC29302WU and LD1117S33TR, AZ1117R-ADJTRG1 uniquely supports user-defined output voltages from 1.25 V to 12 V in SOT-89, with ±1% accuracy and thermal hysteresis-making it optimal for multi-rail embedded systems requiring flexibility and precision.
Availability
AZ1117R-ADJTRG1 is available at Aetrix Electronics and suitable for PC motherboard VRMs, LCD monitor logic supplies, and industrial PLC I/O modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AZ1117R-ADJTRG1 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 LDO regulators for industrial and consumer markets.
The AZ1117 series was developed for cost-sensitive, high-volume applications demanding robust thermal protection, tight output accuracy, and compatibility with standard through-hole and surface-mount assembly processes.
FAQ
What is the minimum load current required for stable operation of AZ1117R-ADJTRG1?
The AZ1117R-ADJTRG1 requires a minimum load current of 1.7–5 mA across –40°C to +125°C, as specified in the Electrical Characteristics table. This ensures proper biasing of the internal error amplifier and prevents output voltage overshoot during light-load transients. Below this threshold, output regulation may degrade or oscillate.
Can AZ1117R-ADJTRG1 be used with ceramic output capacitors?
Yes, the AZ1117R-ADJTRG1 is stable with ceramic output capacitors ≥10 µF, provided ESR is ≥15 mΩ. The datasheet recommends ≥22 µF tantalum or aluminum electrolytic for guaranteed stability, but ceramic caps with appropriate ESR (e.g., X5R/X7R with 0805 or larger case size) are widely used in practice with proper layout.
How does the adjust pin current affect output voltage accuracy?
The adjust pin draws 60–120 µA, which flows through R2 in the feedback divider and adds an offset term: VOUT = VREF × (1 + R2/R1) + IADJ × R2. For R2 = 10 kΩ, this contributes up to 1.2 mV error-negligible for 3.3 V outputs but significant for 1.25 V designs; use lower R2 values or compensate in resistor selection.
Is AZ1117R-ADJTRG1 RoHS compliant and halogen-free?
Yes, the "G1" suffix denotes BCD Semiconductor's green packaging: lead-free (RoHS-compliant) and halogen-free per IEC 61249-2-21. The device meets JEDEC J-STD-020 moisture sensitivity level MSL3 and is qualified for reflow soldering up to 260°C peak temperature.
AZ1117R-ADJTRG1 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:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 15V
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- 13.75V
- 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-ADJTRG1 FAQ
1.How can I place an order for AZ1117R-ADJTRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ1117R-ADJTRG1 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-ADJTRG1 reliable?
The price and inventory of AZ1117R-ADJTRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ1117R-ADJTRG1 is usually 5 days.
3.What payment methods are accepted for AZ1117R-ADJTRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ1117R-ADJTRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ1117R-ADJTRG1?
AZ1117R-ADJTRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ1117R-ADJTRG1 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-ADJTRG1?
For technical support, including AZ1117R-ADJTRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ1117R-ADJTRG1 requirements.
6.How does Aetrix verify that AZ1117R-ADJTRG1 is sourced from the original manufacturer or authorized distributors?
All AZ1117R-ADJTRG1 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-ADJTRG1 meets industry standards.
7.What is the process for return or replacement of AZ1117R-ADJTRG1?
All AZ1117R-ADJTRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ1117R-ADJTRG1, 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-ADJTRG1 part is unused and in its original packaging.
Return procedure for AZ1117R-ADJTRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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