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Diodes Incorporated AZ1117CR-1.8TRG1
- Part No.:
- AZ1117CR-1.8TRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-243AA
- Datasheet:
-
AZ1117CR-1.8TRG1.pdf
- Description:
- IC REG LINEAR 1.8V 1A SOT89
- Quantity:
- Payment:
- Shipping:
Inventory:790
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Product details
Overview
AZ1117CR-1.8TRG1 from Diodes Incorporated is a fixed-output 1.8 V low-dropout linear regulator in SOT89 package, delivering up to 1.35 A output current with ±1% output voltage accuracy, 1.3 V typical dropout at 0.8 A, and 70 dB PSRR at 120 Hz. It integrates thermal shutdown and current limiting, and is optimized for USB devices and PC motherboard power rails.
For engineers reviewing the AZ1117CR-1.8TRG1 datasheet, AZ1117CR-1.8TRG1 pinout, AZ1117CR-1.8TRG1 application, or AZ1117CR-1.8TRG1 equivalent, key selection criteria include dropout voltage at 800 mA load, RMS output noise (0.003% of VOUT), quiescent current (max 6 mA), and compatibility with low-ESR ceramic capacitors (≤20 Ω, ≥10 µF).
Technical Context
The AZ1117CR-1.8TRG1 uses an internal trimmed bandgap reference to maintain ±1% output voltage accuracy across –20°C to +125°C junction temperature. Its overcurrent protection activates at 1.35 A typical, and thermal shutdown triggers at +160°C with +16°C hysteresis.
It operates with input voltages up to 15 V and requires only a 10 µF ceramic output capacitor (ESR < 20 Ω). The device supports stable regulation down to 1.5 V input-to-output differential and exhibits 0.003% RMS output noise (10 Hz–10 kHz) and 70 dB power supply rejection at 120 Hz with 300 mA load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±1% (ensures stable core logic supply for 1.8 V I/O domains) |
| Max Output Current | 1.35 A typical (supports high-current digital loads without external pass transistor) |
| Dropout Voltage | 1.3 V typical at 0.8 A (enables operation from 3.1 V input, critical for battery-backed systems) |
| PSRR | 70 dB at 120 Hz, 300 mA (rejects ripple from upstream switching converters) |
| Quiescent Current | 6 mA maximum (minimizes standby power loss in always-on subsystems) |
| Output Noise | 0.003% of VOUT (10 Hz–10 kHz; preserves signal integrity in analog-sensitive circuits) |
| Thermal Shutdown | Activates at +160°C with +16°C hysteresis (prevents permanent damage during sustained overload) |
Pinout & Package
The AZ1117CR-1.8TRG1 is housed in a 3-pin SOT89 package with exposed tab for thermal dissipation. Pin 1 is INPUT, Pin 2 is OUTPUT, and Pin 3 is GND - matching standard SOT89 pinout for drop-in replacement in legacy designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (INPUT) | Regulator input supply | Accepts 3.1 V to 15 V DC; must be decoupled with ≥10 µF ceramic capacitor |
| Pin 2 (OUTPUT) | Regulated 1.8 V output | Delivers up to 1.35 A; requires low-ESR ceramic capacitor (≤20 Ω) on output |
| Pin 3 (GND) | Ground reference and thermal path | Connected to PCB ground plane; exposed tab enhances thermal conduction to copper pour |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 1.8 V output | Eliminates external resistor network, reducing BOM count and layout area |
| Low ESR capacitor support | Enables use of compact, high-reliability ceramic capacitors instead of bulkier tantalum or electrolytic types |
| Thermal shutdown with hysteresis | Prevents thermal runaway by latching off until junction cools by 16°C, enabling safe recovery |
| ±1% output accuracy | Meets tight tolerance requirements for FPGA I/O banks and low-voltage microcontroller cores |
| 1.35 A current limit | Provides robust short-circuit protection while sustaining full load under transient conditions |
Applications
| USB Peripheral Power | PC Motherboard I/O Rail |
|---|---|
Use Scenario: Powering USB 2.0 hub controller and associated PHY circuitry. IC Role / Device Role / Timing Role: Primary 1.8 V LDO supplying USB transceiver logic and interface buffers. Use Value: Low noise (0.003% VOUT) prevents bit errors; 70 dB PSRR suppresses switching noise from nearby DC/DC converters. | Use Scenario: Generating 1.8 V for SATA controller I/O and PCIe slot auxiliary power. IC Role / Device Role / Timing Role: Fixed-output LDO providing clean, regulated supply to high-speed serial interface logic. Use Value: ±1% accuracy ensures compliance with PCI-SIG 1.8 V I/O voltage spec; 1.3 V dropout enables use of 3.3 V rail as source. |
| DVD Player SoC Core Supply | Add-on Card Logic Rail |
Use Scenario: Delivering 1.8 V to DVD decoder ASIC core and video processing engine. IC Role / Device Role / Timing Role: Main core voltage regulator with thermal protection for thermally constrained consumer enclosures. Use Value: +160°C thermal shutdown prevents latch-up during extended playback; 6 mA IQ minimizes idle power draw. | Use Scenario: Powering FPGA configuration memory and I/O banks on PCIe add-in cards. IC Role / Device Role / Timing Role: Secondary LDO generating isolated 1.8 V domain for programmable logic I/O standards. Use Value: Compatible with ceramic capacitors (≥10 µF, ≤20 Ω ESR) simplifies layout and improves reliability vs. electrolytic alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1802E/TT | 250 mA max output, 6 µA quiescent current, SOT23-5 package | Targeted at ultra-low-power sensor nodes, not high-current loads | Select when standby current dominates design priority and load < 250 mA |
| TLV70018QDDCRQ1 | AEC-Q100 qualified, 200 mA, 50 µA IQ, 175 mV dropout at 200 mA | Designed for automotive infotainment and ADAS modules requiring qualification | Select for automotive-grade applications requiring PPAP and IATF 16949 traceability |
Compared with MCP1700T-1802E/TT and TLV70018QDDCRQ1, the AZ1117CR-1.8TRG1 uniquely balances high output current (1.35 A), industrial temperature range (–20°C to +125°C), and cost-effective SOT89 packaging-making it optimal for consumer and industrial embedded systems where performance and thermal robustness outweigh ultra-low-IQ or automotive certification needs.
Availability
AZ1117CR-1.8TRG1 is available at Aetrix Electronics and suitable for USB peripheral power, PC motherboard I/O rails, DVD player SoC core supplies, and add-on card logic rails requiring stable component supply across production lifecycles.
Supply support for AZ1117CR-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
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 AZ1117C series was designed as a high-current, low-noise LDO family targeting cost-sensitive, thermally constrained applications such as PC motherboards, optical storage, and USB peripherals-emphasizing dropout performance, accuracy, and ceramic capacitor compatibility.
FAQ
What is the minimum input voltage required for stable 1.8 V output at 1 A load?
The AZ1117CR-1.8TRG1 requires a minimum input voltage of 3.1 V to maintain regulation at 1 A load, based on its typical 1.3 V dropout voltage. At higher ambient temperatures or with reduced PCB copper area, the required headroom may increase to 3.3 V to ensure margin against thermal derating.
Can this regulator operate with a 4.7 µF output capacitor?
No. The datasheet specifies a minimum 10 µF ceramic output capacitor with ESR ≤ 20 Ω for stability. Using 4.7 µF risks oscillation or poor transient response, especially under load steps. A 10 µF X5R/X7R ceramic capacitor is the validated minimum.
Is the SOT89 package lead-free and RoHS compliant?
Yes. The AZ1117CR-1.8TRG1 is fully RoHS 3 compliant (2015/863/EU), totally lead-free, and halogen- and antimony-free per Diodes Incorporated's "Green" definition (<900 ppm Br, <900 ppm Cl, <1000 ppm Sb), as confirmed in DS36676 Rev. 5–2.
Does this part include reverse polarity protection?
No. The AZ1117CR-1.8TRG1 lacks integrated reverse-polarity protection. If input reversal is possible in the system, an external series Schottky diode or PMOS FET must be added to prevent damage, as reverse voltage beyond –0.3 V can degrade or destroy the device.
AZ1117CR-1.8TRG1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- AZ1117C
- Package/Case:
- TO-243AA
- 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):
- -
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 6 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-89-3
AZ1117CR-1.8TRG1 FAQ
1.How can I place an order for AZ1117CR-1.8TRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ1117CR-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 AZ1117CR-1.8TRG1 reliable?
The price and inventory of AZ1117CR-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 AZ1117CR-1.8TRG1 is usually 5 days.
3.What payment methods are accepted for AZ1117CR-1.8TRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ1117CR-1.8TRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ1117CR-1.8TRG1?
AZ1117CR-1.8TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ1117CR-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 AZ1117CR-1.8TRG1?
For technical support, including AZ1117CR-1.8TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ1117CR-1.8TRG1 requirements.
6.How does Aetrix verify that AZ1117CR-1.8TRG1 is sourced from the original manufacturer or authorized distributors?
All AZ1117CR-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 AZ1117CR-1.8TRG1 meets industry standards.
7.What is the process for return or replacement of AZ1117CR-1.8TRG1?
All AZ1117CR-1.8TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ1117CR-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 AZ1117CR-1.8TRG1 part is unused and in its original packaging.
Return procedure for AZ1117CR-1.8TRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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