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Diodes Incorporated AZ1117D-2.5TRE1
- Part No.:
- AZ1117D-2.5TRE1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
AZ1117D-2.5TRE1.pdf
- Description:
- IC REG LINEAR 2.5V 1A TO252-2
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
AZ1117D-2.5TRE1 from Diodes Incorporated is a fixed-output 2.5V, 1A low-dropout linear regulator in TO252-2 (3) package, featuring 1.15V dropout at full load, ±1% output voltage accuracy over temperature, and integrated thermal shutdown and current limiting. It delivers stable power to core logic rails in space-constrained industrial control modules.
For engineers reviewing the AZ1117D-2.5TRE1 datasheet, AZ1117D-2.5TRE1 pinout, AZ1117D-2.5TRE1 application, or AZ1117D-2.5TRE1 equivalent, key selection criteria include dropout voltage at 1A, thermal resistance (θJA = 100°C/W), output tolerance (±1%), junction temperature range (–40°C to +125°C), and RoHS-compliant lead-free packaging.
Technical Context
The AZ1117D-2.5TRE1 uses a trimmed bandgap reference and PNP pass transistor architecture to maintain tight output regulation under varying line and load conditions. Its internal current limit is factory-trimmed to 1.25–1.35A, and thermal shutdown activates at +150°C with +25°C hysteresis.
Designed for fixed-voltage operation, it requires no external feedback components. Input voltage must remain ≥3.9V for full 1A output at 2.5V, with ripple rejection of 60–75dB at 120Hz and RMS output noise of 0.003% of VOUT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5V ±1% (10mA–1A, –40°C to +125°C); ensures compatibility with 2.5V FPGA I/O and microcontroller core supplies. |
| Dropout Voltage | 1.15V at 1A (ΔVOUT = 1%); enables operation from 3.65V input, critical for single-cell Li-ion or 5V rail derating. |
| Current Limit | 1.25–1.35A (VIN–VOUT = 2V); provides controlled short-circuit current without latch-up, simplifying fault protection design. |
| Thermal Shutdown | Activates at +150°C junction temperature with +25°C hysteresis; prevents permanent damage during sustained overload or poor heatsinking. |
| Ripple Rejection | 60–75dB at 120Hz (COUT = 22µF tantalum); suppresses switching noise from upstream DC/DC converters feeding the LDO. |
| Quiescent Current | 5–10mA (VIN = VOUT + 1.25V); minimizes no-load power loss in always-on subsystems like real-time clocks or sensor interfaces. |
| Operating Junction Temp | –40°C to +125°C; supports deployment in automotive engine compartments and industrial PLC backplanes. |
Pinout & Package
TO252-2 (3) package: exposed drain pad (Pin 2) serves as thermal and electrical ground; compact 6.5mm × 3.5mm footprint with 0.95mm height ideal for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (INPUT) | Regulator input | Accepts unregulated DC input (3.9V–15V); requires ≥10µF ceramic input capacitor for stability. |
| 2 (OUTPUT) | Regulated output | Delivers 2.5V ±1% at up to 1A; connects to load and 22µF output capacitor (tantalum or low-ESR ceramic). |
| 3 (GND) | Ground reference | Common return for input/output paths and thermal pad; must be connected to large copper pour for θJA = 100°C/W performance. |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout | 1.15V at 1A enables use with marginal input rails where traditional 78xx regulators fail. |
| Trimmed bandgap reference | Ensures ±1% output accuracy across –40°C to +125°C, eliminating need for external calibration. |
| Integrated thermal protection | +150°C shutdown with +25°C hysteresis prevents thermal runaway during board-level thermal stress testing. |
| Lead-free & RoHS compliant | Fully EU RoHS 2015/863/EU compliant; no intentionally added lead, antimony, or halogens per Diodes Inc. green policy. |
| Multiple package options | TO252-2 (3) offers superior thermal performance vs. SOT223 (θJA = 100°C/W vs. 120°C/W) without TO220 mechanical bulk. |
Applications
| PC Motherboard Power | LCD Monitor Logic Supply |
|---|---|
Use Scenario: Providing clean 2.5V to DDR memory termination and chipset I/O buffers on ATX motherboards. IC Role / Device Role / Timing Role: Fixed-output LDO delivering regulated bias for high-speed digital interfaces with minimal noise coupling. Use Value: 0.003% RMS output noise and 75dB ripple rejection prevent timing jitter in DDR clock distribution networks. |
Use Scenario: Powering TCON (timing controller) ASICs and LVDS transmitter ICs in 24-bit color LCD panels. IC Role / Device Role / Timing Role: Primary 2.5V supply for display interface logic requiring stable voltage during rapid brightness transitions. Use Value: ±1% output accuracy over temperature maintains consistent gamma correction and color fidelity across operating ambient range. |
| Industrial PLC I/O Module | Network Interface Card (NIC) |
Use Scenario: Regulating 2.5V for isolated analog front-end ADCs and digital isolator bias in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Local point-of-load regulator ensuring immunity to backplane voltage sag during relay switching events. Use Value: 1.15V dropout allows operation from 3.65V nominal 4–20mA loop-powered rails, extending system uptime. |
Use Scenario: Supplying 2.5V to PCIe PHY transceivers and packet buffer SRAM in enterprise-grade NICs. IC Role / Device Role / Timing Role: Low-noise post-regulator stabilizing switched-mode supply outputs for high-speed serial link integrity. Use Value: Thermal shutdown at +150°C protects against airflow blockage in dense 1U server chassis without requiring external thermal sensors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP2112K-2.5TRG1 | Lower quiescent current (45µA typical), but higher dropout (350mV @ 600mA); SOT23-5 package limits thermal capacity. | Optimized for battery-powered IoT sensors, not 1A industrial loads. | Select only if <1mA no-load current is mandatory and peak load ≤600mA. |
| MCP1700T-2502E/MB | 250mA max output, 175mV dropout @ 250mA; SOT23 package with θJA = 210°C/W. | Suitable for ultra-low-power MCU peripherals, not core logic rails. | Choose only for sub-300mA applications where board space is more constrained than thermal margin. |
Compared with AP2112K-2.5TRG1 and MCP1700T-2502E/MB, the AZ1117D-2.5TRE1 uniquely balances 1A continuous output, 1.15V dropout, and TO252 thermal performance-making it the only viable option for thermally demanding 2.5V core supplies in industrial and computing infrastructure.
Availability
AZ1117D-2.5TRE1 is available at Aetrix Electronics and suitable for PC motherboard power delivery, LCD monitor logic supplies, and industrial PLC I/O modules requiring stable component supply with full RoHS compliance and long-term lifecycle support.
Supply support for AZ1117D-2.5TRE1 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 manufacturer specializing in discrete, analog, and mixed-signal solutions, with emphasis on power management, signal integrity, and protection devices.
The AZ1117 series targets cost-sensitive, high-reliability linear regulation needs in computing, consumer, and industrial equipment-designed specifically to replace legacy 78xx regulators while meeting modern efficiency and thermal requirements.
FAQ
What is the minimum input voltage required for AZ1117D-2.5TRE1 to deliver 1A at 2.5V?
The datasheet specifies a minimum input voltage of 3.9V for full 1A output at 2.5V, based on the 1.15V dropout voltage at rated current. Operating below this threshold causes output voltage collapse or current limiting. Input capacitance ≥10µF ceramic is required for transient stability.
Can AZ1117D-2.5TRE1 be used in adjustable configuration?
No. The AZ1117D-2.5TRE1 is a fixed-output variant with internal resistor divider; only the AZ1117D-ADJTRE1 part supports adjustable output via external resistors. Attempting to modify the fixed version will result in incorrect or unstable regulation.
How does thermal performance differ between TO252-2 (3) and SOT223 packages for this device?
The TO252-2 (3) package has θJA = 100°C/W versus 120°C/W for SOT223 under identical PCB layout conditions. This 20°C/W improvement allows ~15% higher continuous current before thermal shutdown in ambient temperatures above 70°C, verified in Diodes' thermal characterization reports.
Is AZ1117D-2.5TRE1 recommended for new designs?
Yes-unlike the legacy AZ1117 (noted "NOT RECOMMENDED FOR NEW DESIGN" in the datasheet), the AZ1117D-2.5TRE1 belongs to the current-generation AZ1117D series, which supersedes earlier variants and is actively supported with full production status and extended lifecycle commitment per Diodes Incorporated's product change notifications.
AZ1117D-2.5TRE1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- AZ1117
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- 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):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.25V @ 1A
- Current - Output:
- 1A
- 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:
- TO-252-3
AZ1117D-2.5TRE1 FAQ
1.How can I place an order for AZ1117D-2.5TRE1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ1117D-2.5TRE1 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 AZ1117D-2.5TRE1 reliable?
The price and inventory of AZ1117D-2.5TRE1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ1117D-2.5TRE1 is usually 5 days.
3.What payment methods are accepted for AZ1117D-2.5TRE1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ1117D-2.5TRE1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ1117D-2.5TRE1?
AZ1117D-2.5TRE1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ1117D-2.5TRE1 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 AZ1117D-2.5TRE1?
For technical support, including AZ1117D-2.5TRE1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ1117D-2.5TRE1 requirements.
6.How does Aetrix verify that AZ1117D-2.5TRE1 is sourced from the original manufacturer or authorized distributors?
All AZ1117D-2.5TRE1 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 AZ1117D-2.5TRE1 meets industry standards.
7.What is the process for return or replacement of AZ1117D-2.5TRE1?
All AZ1117D-2.5TRE1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ1117D-2.5TRE1, 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 AZ1117D-2.5TRE1 part is unused and in its original packaging.
Return procedure for AZ1117D-2.5TRE1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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