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Diodes Incorporated AZ1117R-1.8TRE1
- Part No.:
- AZ1117R-1.8TRE1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-243AA
- Datasheet:
-
AZ1117R-1.8TRE1.pdf
- Description:
- IC REG LINEAR 1.8V 1.25A SOT89
- Quantity:
- Payment:
- Shipping:
Inventory:955
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Product details
Overview
AZ1117R-1.8TRE1 from Diodes Incorporated is a fixed-output 1.8V, 1A low-dropout linear regulator in SOT89 package, delivering ±1% output voltage accuracy at 25°C, 1.15V dropout at full load, and integrated thermal shutdown and current limiting. It powers core logic rails in space-constrained embedded systems such as LCD controller boards and peripheral interface modules.
For engineers reviewing the AZ1117R-1.8TRE1 datasheet, AZ1117R-1.8TRE1 pinout, AZ1117R-1.8TRE1 application, or AZ1117R-1.8TRE1 equivalent, key selection criteria include dropout voltage at 1A, thermal resistance in SOT89, load regulation under 10mA–1A, RMS output noise, and compatibility with 22µF tantalum output capacitors.
Technical Context
The AZ1117R-1.8TRE1 uses a trimmed bandgap reference and PNP pass transistor architecture to maintain stable 1.8V output across -40°C to +125°C junction temperature. Its internal current limit is factory-trimmed to 1.25–1.35A, and thermal shutdown activates at +150°C with +25°C hysteresis.
It operates with input voltages up to 15V and requires only 10µF input and 22µF output capacitance for stability. Ripple rejection is 60–75dB at 120Hz with 22µF tantalum output capacitor and 3V headroom, and quiescent current remains 5–10mA across operating conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8V ±1% (10mA–1A load, 3.2V–10V input), enabling precise core supply for 1.8V I/O and logic ICs |
| Dropout Voltage | 1.15V at 1A (ΔVOUT = 1%), allowing operation from 3.0V input while sustaining full rated output |
| Load Regulation | ≤10mV (10mA → 1A), ensuring minimal voltage shift during dynamic processor or FPGA core loading |
| Ripple Rejection | 60–75dB at 120Hz, suppressing switching noise from upstream DC/DC converters feeding the LDO |
| Thermal Shutdown | Activates at +150°C junction temperature with +25°C hysteresis, preventing permanent damage during sustained overload |
| Quiescent Current | 5–10mA (VIN = VOUT + 1.25V), minimizing no-load power loss in always-on subsystems |
| Operating Junction Temp | -40°C to +125°C, supporting industrial and automotive under-hood peripheral applications |
Pinout & Package
SOT89-3 package: 3-pin surface-mount outline with exposed thermal pad (pin 2 connected to tab); footprint compatible with JEDEC TO-243AA standard. Thermal resistance θJA = 165°C/W (no heatsink), θJC = 30°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VOUT) | Regulated output terminal | Delivers stable 1.8V to load; requires ≥22µF low-ESR tantalum or ceramic capacitor for stability |
| 2 (INPUT) | Unregulated input supply connection | Accepts 3.2V–15V input; must be decoupled with ≥10µF capacitor near pin |
| 3 (GND) | Ground reference and thermal path | Common return for internal circuitry; tab connects to GND for thermal conduction to PCB copper |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout at full load | 1.15V @ 1A enables use with 3.0V input sources (e.g., single-cell LiFePO₄ or buck converter outputs) |
| Factory-trimmed output accuracy | ±1% over temperature and line/load ensures compliance with 1.8V core rail tolerances (e.g., ARM Cortex-M4, DDR2 I/O) |
| Integrated protection | Current limit (1.25–1.35A) + thermal shutdown (+150°C) eliminate need for external fault management circuitry |
| Stable with low-ESR capacitors | Validated with 22µF tantalum or ≥10µF ceramic output caps-reduces BOM count vs. legacy LDOs requiring >47µF |
| Lead-free & RoHS-compliant | Fully EU RoHS 2015/863/EU compliant; no intentionally added lead; halogen- and antimony-free packaging |
Applications
| PC Motherboard VRM Auxiliary Rail | LCD Monitor Timing Controller Supply |
|---|---|
Use Scenario: Powers 1.8V I/O banks of embedded controller (e.g., ITE IT8528E) on ATX motherboard auxiliary power plane. IC Role / Device Role / Timing Role: Fixed-output LDO providing clean, low-noise bias for memory interface and PCIe configuration logic. Use Value: 0.003% RMS output noise and 75dB ripple rejection prevent bit errors in SMBus and SPI communication links. |
Use Scenario: Supplies 1.8V logic rail to LVDS timing controller (e.g., Parade PS8315) in 24-bit RGB LCD panels. IC Role / Device Role / Timing Role: Low-dropout regulator maintaining stable voltage during backlight dimming transients that cause input rail sag. Use Value: 1.15V dropout allows direct regulation from 3.3V buck converter, eliminating intermediate 2.5V stage and reducing board area. |
| Graphic Card Display Interface | Industrial Ethernet PHY Bias |
Use Scenario: Delivers 1.8V to HDMI transmitter IC (e.g., Parade PS8640) on discrete GPU add-in cards. IC Role / Device Role / Timing Role: Local point-of-load regulator isolating high-speed video interface from GPU core power noise. Use Value: Load regulation ≤10mV prevents pixel clock jitter when GPU GPU memory bandwidth fluctuates between idle and render states. |
Use Scenario: Provides 1.8V bias to Marvell 88E1512 Gigabit Ethernet PHY's digital I/O and MDIO interface. IC Role / Device Role / Timing Role: Industrial-grade LDO meeting extended temperature (-40°C to +125°C) requirements for DIN-rail mounted switches. Use Value: Guaranteed operation at +125°C junction enables placement near heat-generating magnetics without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1802E/TT | 250mA output, 6µA quiescent current, SOT23-3 package | Lower current capacity; suited for ultra-low-power microcontrollers, not 1A loads | Select only if load current ≤250mA and standby current <10µA is critical |
| TLV1117-18CDCYR | 1A output, ±2% initial accuracy, higher dropout (1.2V @ 1A), SOIC-8 package | Requires larger PCB area; less accurate for tight 1.8V tolerance applications | Choose if SOIC-8 mounting is mandatory and ±2% output tolerance is acceptable |
Compared with MCP1700T-1802E/TT and TLV1117-18CDCYR, the AZ1117R-1.8TRE1 uniquely balances 1A capability, ±1% accuracy, SOT89 compactness, and proven 22µF-stable operation-making it optimal for cost-sensitive, thermally constrained 1.8V system rails.
Availability
AZ1117R-1.8TRE1 is available at Aetrix Electronics and suitable for PC motherboard auxiliary rails, LCD monitor timing controllers, graphic card display interfaces, and industrial Ethernet PHY biasing requiring stable component supply across extended temperature ranges.
Supply support for AZ1117R-1.8TRE1 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 semiconductor company specializing in discrete, analog, and mixed-signal devices, with design centers in Asia, Europe, and the U.S., serving industrial, computing, and consumer markets.
The AZ1117 series was developed for cost-effective, thermally robust local regulation in space-constrained power domains-targeting PC peripherals, display electronics, and network infrastructure where reliability and RoHS compliance are mandatory.
FAQ
What is the minimum input voltage required for AZ1117R-1.8TRE1 to regulate at full 1A load?
The minimum input voltage is 2.95V: calculated as VOUT + VDROP = 1.8V + 1.15V. However, per Recommended Operating Conditions, VIN must be ≥3.2V to ensure guaranteed performance across temperature and process variation. Operation below 3.2V may result in marginal dropout margin or reduced current limit.
Can AZ1117R-1.8TRE1 be used with ceramic output capacitors instead of tantalum?
Yes-Diodes' datasheet validates stability with ≥10µF X5R/X7R ceramic capacitors (ESR < 100mΩ). Unlike older LDOs, the AZ1117R-1.8TRE1 does not require minimum ESR, eliminating risk of oscillation with low-ESR ceramics commonly used in modern designs.
Is thermal pad soldering required for reliable operation at 1A continuous load?
Yes. The SOT89 thermal pad (pin 2) must be soldered to a ≥100mm² copper pour to achieve θJA ≈ 165°C/W. Without thermal pad connection, junction temperature rise exceeds safe limits at 1A ambient >50°C, triggering thermal shutdown.
Does AZ1117R-1.8TRE1 support reverse-voltage protection?
No. The device lacks internal reverse-battery or reverse-polarity protection. Applying reverse voltage (>−0.3V on INPUT or VOUT relative to GND) may cause latch-up or permanent damage. External Schottky diode protection is required in systems with potential polarity reversal.
AZ1117R-1.8TRE1 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:
- 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:
- 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-1.8TRE1 FAQ
1.How can I place an order for AZ1117R-1.8TRE1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ1117R-1.8TRE1 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-1.8TRE1 reliable?
The price and inventory of AZ1117R-1.8TRE1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ1117R-1.8TRE1 is usually 5 days.
3.What payment methods are accepted for AZ1117R-1.8TRE1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ1117R-1.8TRE1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ1117R-1.8TRE1?
AZ1117R-1.8TRE1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ1117R-1.8TRE1 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-1.8TRE1?
For technical support, including AZ1117R-1.8TRE1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ1117R-1.8TRE1 requirements.
6.How does Aetrix verify that AZ1117R-1.8TRE1 is sourced from the original manufacturer or authorized distributors?
All AZ1117R-1.8TRE1 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-1.8TRE1 meets industry standards.
7.What is the process for return or replacement of AZ1117R-1.8TRE1?
All AZ1117R-1.8TRE1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ1117R-1.8TRE1, 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-1.8TRE1 part is unused and in its original packaging.
Return procedure for AZ1117R-1.8TRE1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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