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Diodes Incorporated AZ1117CH-ADJTRG1
- Part No.:
- AZ1117CH-ADJTRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
AZ1117CH-ADJTRG1.pdf
- Description:
- IC REG LINEAR POS ADJ 1A SOT223
- Quantity:
- Payment:
- Shipping:
Inventory:17,810
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Product details
Overview
AZ1117CH-ADJTRG1 from Diodes Incorporated is a low-dropout linear regulator IC designed for precision voltage regulation in space-constrained, thermally sensitive applications. It delivers up to 1.35A output current with ±1% reference voltage accuracy (1.250V typ), 1.3V typical dropout at 0.8A, and 70dB PSRR at 120Hz - enabling stable 3.3V or 5V rail generation from USB or PC motherboard power supplies.
For engineers reviewing the AZ1117CH-ADJTRG1 datasheet, AZ1117CH-ADJTRG1 pinout, AZ1117CH-ADJTRG1 application, or AZ1117CH-ADJTRG1 equivalent, key selection criteria include adjustable output configuration via external resistors, thermal shutdown activation at +160°C, compatibility with low-ESR ceramic capacitors (≤20Ω), and SOT223 package thermal resistance of 15°C/W (junction-to-case).
Technical Context
The AZ1117CH-ADJTRG1 implements a trimmed bandgap reference and internal current-limit circuitry to maintain output stability under transient load changes. Its dropout behavior is characterized by ≤1.4V across TO252-2 and SOT223 packages at 0.8A, with junction temperature operation spanning –20°C to +125°C.
Adjust pin current remains tightly controlled (60–120µA) over input-output differentials from 1.5V to 10V, enabling precise external resistor-based output setting using VOUT = VREF(1 + R2/R1) + IADJR2. Thermal shutdown includes +16°C hysteresis to prevent oscillation during overload recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VREF | 1.250V typical; sets minimum output voltage in adjustable mode and defines regulation accuracy. |
| Dropout Voltage | 1.3V typical at 0.8A (SOT223); determines minimum VIN required for regulation at full load. |
| Output Current | 1.35A typical current limit; protects against short-circuit and overload conditions. |
| PSRR | 70dB at 120Hz, 300mA load; suppresses ripple from upstream switching converters or noisy DC sources. |
| Thermal Shutdown | Activates at +160°C junction temperature; prevents permanent damage during sustained overloads or poor heatsinking. |
| Output Noise | 0.003% of VOUT RMS (10Hz–10kHz); critical for noise-sensitive analog circuits like ADC references or audio preamps. |
| Quiescent Current | 6mA maximum; minimizes standby power loss in battery-backed or always-on systems. |
Pinout & Package
The AZ1117CH-ADJTRG1 is packaged in SOT223 (H package), a surface-mount, 3-pin thermally enhanced outline with exposed thermal pad. Pin 1 is INPUT, Pin 2 is OUTPUT, Pin 3 is ADJ/GND - where ADJ serves as the feedback node for adjustable output configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (INPUT) | Unregulated input supply connection | Accepts 2.7V to 15V DC; must exceed VOUT by ≥1.3V to maintain regulation at full load. |
| Pin 2 (OUTPUT) | Regulated output voltage node | Delivers stable voltage set by external R1/R2 divider; requires ≥10µF low-ESR ceramic capacitor. |
| Pin 3 (ADJ/GND) | Reference feedback and ground return | Connects to voltage divider midpoint; draws 60–120µA; ties to system ground in fixed-voltage variants. |
Key Features
| Feature | Design Value |
|---|---|
| Trimmed bandgap reference | Ensures ±1% output voltage accuracy over –20°C to +125°C without external calibration. |
| Low-ESR capacitor compatibility | Supports ceramic output capacitors with ESR <20Ω, eliminating need for bulk electrolytic or tantalum types. |
| Integrated thermal shutdown | Self-protects at +160°C junction temperature with +16°C hysteresis to avoid cycling during recovery. |
| High PSRR at low frequency | 70dB rejection at 120Hz enables clean LDO operation directly after AC/DC rectifiers or buck converter outputs. |
| Adjustable output architecture | Enables user-defined VOUT from 1.25V to (VIN – VDROP) using two standard resistors per application circuit. |
Applications
| USB Power Regulation | PC Motherboard VRM |
|---|---|
Use Scenario: Regulating 5V USB bus power to 3.3V for microcontroller peripherals and level-shifting interfaces. IC Role / Device Role / Timing Role: Primary post-regulator delivering low-noise, thermally robust 3.3V supply with fast transient response to burst-mode data transfers. Use Value: 0.003% RMS output noise and 70dB PSRR ensure signal integrity for USB PHY layers and high-speed digital I/O. | Use Scenario: Providing auxiliary 1.8V or 2.5V rails for chipset I/O buffers and memory termination on ATX motherboards. IC Role / Device Role / Timing Role: Secondary LDO supplying low-current, precision voltage domains isolated from main VRM switching noise. Use Value: ±1% output accuracy and thermal shutdown at +160°C support reliable operation in high-density, convection-cooled PCB environments. |
| Add-on Card Power | DVD Player Audio Supply |
Use Scenario: Generating clean 1.2V or 1.5V core voltage for FPGA configuration logic or PCIe endpoint controllers on expansion cards. IC Role / Device Role / Timing Role: Local point-of-load regulator minimizing IR drop and noise coupling from shared backplane power. Use Value: 1.35A current limit and SOT223's 15°C/W θJC enable compact thermal design without heatsinks in limited board area. | Use Scenario: Supplying ultra-low-noise 3.3V bias for DACs, op-amps, and headphone amplifiers in consumer DVD players. IC Role / Device Role / Timing Role: Analog-domain LDO decoupling digital switching noise from sensitive audio signal paths. Use Value: 0.003% RMS output noise (10Hz–10kHz) meets THD+N requirements for CD-quality audio playback stages. |
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 | Higher dropout (1.5V @ 3A), higher quiescent current (25mA), TO263-5 package | Better suited for high-current, non-space-constrained industrial modules | Select when >1.35A continuous load or higher input headroom is available. |
| TLV1117-ADJ | Lower max current (800mA), tighter VREF tolerance (±0.5%), same SOT223 footprint | Ideal for low-power portable devices requiring tighter initial accuracy | Choose when load current ≤800mA and ±0.5% reference accuracy is mandatory. |
Compared with MIC29302WU and TLV1117-ADJ, the AZ1117CH-ADJTRG1 offers optimal balance of current capability (1.35A), thermal performance (15°C/W θJC in SOT223), and noise (0.003% RMS), making it preferred for mid-power embedded systems where board area and thermal management are constrained.
Availability
AZ1117CH-ADJTRG1 is available at Aetrix Electronics and suitable for USB devices, PC motherboards, add-on cards, and DVD players requiring stable component supply with RoHS-compliant, lead-free manufacturing.
Supply support for AZ1117CH-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 high-reliability power management, signal integrity, and protection solutions.
The AZ1117C series targets cost-sensitive, thermally demanding applications in computing, consumer electronics, and industrial controls - emphasizing low dropout, thermal robustness, and compatibility with modern ceramic capacitors.
FAQ
What is the minimum output capacitor value required for stable operation?
A minimum 10µF low-ESR ceramic capacitor is required at the output, with ESR not exceeding 20Ω. This ensures phase margin and transient stability across the full operating temperature range (–20°C to +125°C). Larger values improve ripple suppression but do not affect basic regulation stability.
Can AZ1117CH-ADJTRG1 be used with input voltages above 15V?
No - the absolute maximum input voltage is 18V, but recommended operating VIN is ≤15V. Exceeding 15V risks exceeding maximum power dissipation limits, especially at high ambient temperatures or without adequate heatsinking, potentially triggering thermal shutdown or reducing long-term reliability.
How does the adjust pin current affect output voltage accuracy?
The adjust pin draws 60–120µA, which flows through R2 in the feedback divider. This introduces a small error term (IADJ·R2) in the output equation VOUT = VREF(1 + R2/R1) + IADJR2. To minimize error, R2 should be ≤10kΩ; higher values increase sensitivity to IADJ variation.
Is AZ1117CH-ADJTRG1 qualified for automotive applications?
No - this specific variant is not AEC-Q100 qualified. Diodes Incorporated offers automotive-grade versions (e.g., AZ1117CQ series) with PPAP capability, IATF 16949 manufacturing, and extended temperature screening. For automotive use, contact Diodes' automotive sales team for qualified alternatives.
AZ1117CH-ADJTRG1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- AZ1117C
- Package/Case:
- TO-261-4, TO-261AA
- 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):
- 13.7V
- Voltage Dropout (Max):
- 1.3V @ 800mA
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 5 mA
- Current - Supply (Max):
- -
- PSRR:
- 70dB (120Hz)
- Control Features:
- -
- Protection Features:
- Thermal Shutdown
- Operating Temperature:
- -20°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
AZ1117CH-ADJTRG1 FAQ
1.How can I place an order for AZ1117CH-ADJTRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ1117CH-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 AZ1117CH-ADJTRG1 reliable?
The price and inventory of AZ1117CH-ADJTRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ1117CH-ADJTRG1 is usually 5 days.
3.What payment methods are accepted for AZ1117CH-ADJTRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ1117CH-ADJTRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ1117CH-ADJTRG1?
AZ1117CH-ADJTRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ1117CH-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 AZ1117CH-ADJTRG1?
For technical support, including AZ1117CH-ADJTRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ1117CH-ADJTRG1 requirements.
6.How does Aetrix verify that AZ1117CH-ADJTRG1 is sourced from the original manufacturer or authorized distributors?
All AZ1117CH-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 AZ1117CH-ADJTRG1 meets industry standards.
7.What is the process for return or replacement of AZ1117CH-ADJTRG1?
All AZ1117CH-ADJTRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ1117CH-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 AZ1117CH-ADJTRG1 part is unused and in its original packaging.
Return procedure for AZ1117CH-ADJTRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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