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Diodes Incorporated AZ1117EH-ADJTRG1
- Part No.:
- AZ1117EH-ADJTRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
AZ1117EH-ADJTRG1.pdf
- Description:
- IC REG LINEAR POS ADJ 1A SOT223
- Quantity:
- Payment:
- Shipping:
Inventory:3,676
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Product details
Overview
AZ1117EH-ADJTRG1 from Diodes Incorporated is an adjustable low-dropout linear regulator delivering 1.0A output current with 1.25V reference voltage, 1.1V typical dropout at full load, ±1% output accuracy, and thermal shutdown protection. It operates across -40°C to +125°C junction temperature and is used in notebook power rails, STB voltage scaling, and LCD monitor bias supplies.
For engineers reviewing the AZ1117EH-ADJTRG1 datasheet, AZ1117EH-ADJTRG1 pinout, AZ1117EH-ADJTRG1 application, or AZ1117EH-ADJTRG1 equivalent, key selection criteria include adjustable output configuration (VOUT = 1.25V × (1 + R2/R1)), compatibility with low-ESR ceramic capacitors (≥1.0µF), and thermal shutdown activation at ~170°C.
Technical Context
The AZ1117EH-ADJTRG1 implements a bandgap-referenced error amplifier with internal current limiting and thermal foldback. Its ADJ pin draws only 45µA typical, enabling precise external resistor-based output programming while minimizing load regulation error.
Stability is ensured with output capacitors having ESR <1.5Ω and minimum 1.0µF capacitance; it achieves 70dB PSRR at 1kHz and maintains ±0.2%/A load regulation over 1mA–1A output range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1.0A continuous - supports core logic rails and peripheral power domains |
| Dropout Voltage | 1.1V typ. @ 1A - enables operation from 3.3V input to 2.5V output or 5V input to 3.3V output |
| Reference Voltage | 1.25V ±1% - sets precision of externally adjusted output via resistor divider |
| Quiescent Current | 3.5mA - minimizes no-load power loss in always-on subsystems |
| PSRR | 70dB @ 1kHz - suppresses ripple from noisy switcher-derived input supplies |
| Thermal Shutdown | 170°C activation - protects against sustained overload or poor heatsinking |
| Operating Temp | -40°C to +125°C - qualified for industrial and extended-temperature embedded applications |
Pinout & Package
Supplied in the industry-standard SOT-223 package with exposed thermal pad (pin 2 connected to die attach paddle), offering 40°C/W junction-to-case thermal resistance and compatibility with standard PCB reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (ADJ/GND) | Adjust/Reference Return | Serves as ground reference for feedback divider; connects to GND in fixed versions, but floats for adjustable configuration |
| 2 (OUTPUT) | Regulated Output | Delivers stabilized voltage; requires ≥1.0µF low-ESR ceramic capacitor placed adjacent to pin |
| 3 (INPUT) | Unregulated Input | Accepts 2.5V–13V supply; must be decoupled with ≥1.0µF ceramic capacitor near pin |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable Output Configuration | VOUT = 1.25V × (1 + R2/R1) + IADJ×R2 - enables custom voltages from 1.25V to ≤(VIN − 1.1V) with <5µA adjustment current error |
| Low-ESR Ceramic Stability | Stable with MLCCs ≥1.0µF and ESR <1.5Ω - eliminates need for tantalum or aluminum electrolytic capacitors |
| High Accuracy Reference | 1.25V ±1% over -40°C to +125°C - ensures output tolerance remains within ±1.5% including resistor drift |
| Robust Protection | Integrated current limit (1.3A typ.) and thermal shutdown (170°C) - prevents latch-up during short-circuit or ambient overheating |
| Low Noise Performance | 3mV RMS noise (10Hz–100kHz) - suitable for analog sensor biasing and ADC reference supplies |
Applications
| Notebook CPU Core Voltage Scaling | Set-Top Box AVDD Rail Generation |
|---|---|
Use Scenario: Dynamic voltage scaling for Intel Atom or ARM Cortex-A series processors requiring 0.8–1.35V at up to 1.0A. IC Role / Device Role / Timing Role: Primary post-regulator converting 3.3V or 5V intermediate rail to precise, low-noise core voltage. Use Value: 1.25V reference accuracy and 70dB PSRR ensure stable digital logic operation under varying load transients. | Use Scenario: Generating clean 1.8V or 2.5V supply for HDMI PHY, audio DAC, or tuner ICs in cable/satellite STBs. IC Role / Device Role / Timing Role: Local LDO supplying noise-sensitive analog and high-speed serial interfaces. Use Value: Low 3mV RMS output noise prevents jitter in HDMI clock recovery and audible artifacts in audio paths. |
| LCD Monitor VCOM Bias Supply | Industrial PLC I/O Module Regulation |
Use Scenario: Providing adjustable ±15V or programmable mid-rail bias (e.g., 7.5V) for TFT-LCD column driver ICs. IC Role / Device Role / Timing Role: Precision adjustable regulator feeding op-amp-based VCOM buffer stages. Use Value: ±1% reference and <0.2%/A load regulation maintain display grayscale fidelity across temperature and brightness changes. | Use Scenario: Powering isolated RS-485 transceivers, analog input front-ends, and microcontroller peripherals in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Secondary LDO delivering stable 3.3V or 5.0V from a 12V or 24V system rail. Use Value: -40°C to +125°C operating range and thermal shutdown ensure reliability in unventilated enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC29302AWU | 2.5A output, 0.4V dropout, TO-263 package - higher current, lower dropout, larger footprint | Used where >1A load or <3.3V input headroom is required | Select when thermal design permits TO-263 and 2.5A capability is needed |
| AP1117E12G-13 | Fixed 1.2V version, same SOT-223 package, identical thermal specs - no external resistors needed | Preferred for cost-sensitive, single-voltage designs without adjustment requirement | Choose for simplified BOM and layout when output voltage is fixed |
Compared with MIC29302AWU and AP1117E12G-13, the AZ1117EH-ADJTRG1 offers optimal balance of adjustability, SOT-223 footprint, and 1.0A capability-ideal for space-constrained designs needing flexible output voltage without sacrificing thermal performance or noise immunity.
Availability
AZ1117EH-ADJTRG1 is available at Aetrix Electronics and suitable for notebook power management, set-top box AVDD generation, and LCD monitor VCOM biasing requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for AZ1117EH-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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
The AZ1117E series belongs to Diodes' precision LDO portfolio, designed specifically for low-noise, thermally robust point-of-load regulation in space-constrained applications where ceramic capacitor compatibility and ±1% accuracy are critical.
FAQ
What is the minimum load current required for stable operation of AZ1117EH-ADJTRG1?
The AZ1117EH-ADJTRG1 requires a minimum load current of 2mA to maintain regulation stability across temperature. This is due to internal biasing requirements of the error amplifier and reference circuit. Below this threshold, output voltage may rise above nominal due to reduced feedback loop gain; adding a 1kΩ–5kΩ bleed resistor from OUTPUT to GND ensures compliance.
Can AZ1117EH-ADJTRG1 be used with ceramic capacitors smaller than 1.0µF?
No-Diodes specifies a minimum 1.0µF ceramic capacitor on both input and output for stability. Using smaller values risks oscillation or degraded transient response. If space constraints require smaller footprints, parallel a 0.68µF capacitor with a 0.1µF unit placed ≥5mm from the OUTPUT pin, per datasheet Note 4.
How does the ADJ pin current affect output voltage accuracy?
The ADJ pin draws 45µA typical (max 90µA), introducing a small offset error in the feedback divider: VOUT = 1.25V × (1 + R2/R1) + IADJ×R2. For R2 = 10kΩ, this adds up to 0.45V error-so R2 should be ≤2.2kΩ to hold error <1%. The datasheet recommends R1 = 330Ω to minimize this effect.
Is AZ1117EH-ADJTRG1 pin-compatible with older AZ1117 versions?
Yes-AZ1117EH-ADJTRG1 uses the same SOT-223 pinout and electrical specifications as prior AZ1117E revisions. However, it supersedes obsolete AZ1117E variants; Diodes recommends verifying thermal layout compatibility due to updated thermal resistance characterization (θJA = 65°C/W on specified 2oz FR-4 board).
AZ1117EH-ADJTRG1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- AZ1117E
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 13V
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- 11.7V
- Voltage Dropout (Max):
- 1.3V @ 1A
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 6 mA
- Current - Supply (Max):
- -
- PSRR:
- 70dB (120Hz ~ 1kHz)
- 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
AZ1117EH-ADJTRG1 FAQ
1.How can I place an order for AZ1117EH-ADJTRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ1117EH-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 AZ1117EH-ADJTRG1 reliable?
The price and inventory of AZ1117EH-ADJTRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ1117EH-ADJTRG1 is usually 5 days.
3.What payment methods are accepted for AZ1117EH-ADJTRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ1117EH-ADJTRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ1117EH-ADJTRG1?
AZ1117EH-ADJTRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ1117EH-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 AZ1117EH-ADJTRG1?
For technical support, including AZ1117EH-ADJTRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ1117EH-ADJTRG1 requirements.
6.How does Aetrix verify that AZ1117EH-ADJTRG1 is sourced from the original manufacturer or authorized distributors?
All AZ1117EH-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 AZ1117EH-ADJTRG1 meets industry standards.
7.What is the process for return or replacement of AZ1117EH-ADJTRG1?
All AZ1117EH-ADJTRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ1117EH-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 AZ1117EH-ADJTRG1 part is unused and in its original packaging.
Return procedure for AZ1117EH-ADJTRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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