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Diodes Incorporated AZ1085CD-2.5TRG1
- Part No.:
- AZ1085CD-2.5TRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
AZ1085CD-2.5TRG1.pdf
- Description:
- IC REG LINEAR 2.5V 3A TO252-2
- Quantity:
- Payment:
- Shipping:
Inventory:3,440
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Product details
Overview
AZ1085CD-2.5TRG1 from Diodes Incorporated is a 3A low-dropout linear regulator with fixed 2.5V output, TO252-2 (3) package, 1.3V typical dropout at full load, thermal shutdown, and current limiting. It delivers stable microprocessor supply voltage in compact industrial power rails where ceramic capacitor compatibility and ±1% output accuracy are required.
For engineers reviewing the AZ1085CD-2.5TRG1 datasheet, AZ1085CD-2.5TRG1 pinout, AZ1085CD-2.5TRG1 application, or AZ1085CD-2.5TRG1 equivalent, key selection criteria include dropout voltage at 3A, load regulation under 7mV, junction temperature range (0°C to +125°C), RoHS/Green compliance, and TO252-2 (3) thermal resistance (θJA = 100°C/W).
Technical Context
The AZ1085CD-2.5TRG1 integrates a precision bandgap reference (1.225–1.275V), internal current-limit circuit (4.5A typ), and thermal shutdown protection. Its architecture supports stable regulation with low-ESR ceramic capacitors on input and output without requiring external compensation.
It operates across 4.0V to 7.0V input range for 2.5V output, maintains 0.1% typical load regulation and 0.015% typical line regulation, and exhibits 72dB PSRR at 120Hz - enabling clean post-regulation after switching supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±1% (2.475–2.525V) over 0–3A load and 0–125°C junction temp |
| Dropout Voltage | 1.3V typical at 3A load - enables operation with only 3.8V input for 2.5V rail |
| Load Regulation | ≤7mV (0–3A) - ensures <0.3% output deviation during CPU burst current transients |
| Line Regulation | 0.5mV typical (4.0–10V input) - minimizes sensitivity to upstream supply ripple |
| Thermal Protection | On-chip thermal shutdown activates at +150°C junction - prevents damage during overload or poor heatsinking |
| PSRR | 72dB at 120Hz - suppresses switching noise from preceding DC/DC stage effectively |
| Quiescent Current | 5–10mA - low bias draw preserves efficiency in always-on subsystems |
Pinout & Package
Package: TO252-2 (3), surface-mount, thermally enhanced DPAK variant with exposed tab (pin 3) tied to GND for improved heat dissipation. θJA = 100°C/W, θJC = 7.36°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | INPUT | Unregulated input supply (4.0–7.0V); requires ≥10µF low-ESR ceramic capacitor |
| 2 | OUTPUT | Regulated 2.5V output; stable with ≥22µF ceramic output capacitance |
| 3 | ADJ/GND | Ground reference and adjust node; internally connected to GND for fixed-output version |
Key Features
| Feature | Design Value |
|---|---|
| Low ESR capacitor support | Stable with ceramic capacitors ≥10µF input / ≥22µF output - eliminates need for tantalum or electrolytic |
| Current limiting | 4.5A typical foldback limit - protects against short-circuit while allowing brief 3A continuous operation |
| Lead-free & Green | Totally lead-free, halogen- and antimony-free (Br+Cl <1500ppm, Sb <1000ppm) - meets RoHS 3 and JEDEC MSL-1 |
| Thermal resistance | θJC = 7.36°C/W - enables >4W power dissipation with modest PCB copper area (≥1in² 2oz Cu) |
Applications
| Microprocessor Core Supply | Battery Charger Post-Regulator |
|---|---|
Use Scenario: Powers ARM Cortex-M7 core in industrial PLC controller with dynamic current from 10mA to 3A. IC Role / Device Role / Timing Role: Primary LDO delivering clean, low-noise 2.5V VDDCORE with fast transient response. Use Value: 7mV load regulation and 100µs transient recovery ensure logic stability during instruction bursts without brownout. |
Use Scenario: Final-stage regulator in 5V-to-2.5V USB-C battery charger IC supply chain. IC Role / Device Role / Timing Role: Low-noise post-regulator isolating sensitive analog charging control circuitry from switcher ripple. Use Value: 72dB PSRR at 120Hz attenuates switching artifacts, reducing charge voltage error to <±1.25mV. |
| Motherboard I/O Rail | Set-Top Box AV Processing |
Use Scenario: Supplies 2.5V to PCIe Gen3 retimer and SATA PHY on embedded motherboard. IC Role / Device Role / Timing Role: Dedicated LDO for high-speed interface power domain with strict noise floor requirements. Use Value: 0.003% RMS output noise (≈75µV) prevents jitter accumulation in 6GHz serial links. |
Use Scenario: Powers video DAC and audio codec in HD set-top box requiring simultaneous analog/digital cleanliness. IC Role / Device Role / Timing Role: Single-point 2.5V source shared across mixed-signal subsystems with independent decoupling. Use Value: Compatible with parallel 22µF X7R ceramics - achieves <10mΩ impedance at 1MHz for sub-10mV ripple. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP2302CG-2.5TRG1 | 2.5V/2A, 0.9V dropout at 2A, higher PSRR (80dB), but no thermal shutdown | Limited to lower-current apps (<2A); unsuitable for sustained 3A loads or unheatsinked layouts | Select only if peak current ≤2A and board-level thermal management is robust |
| TLV1117-25CDCYR | 2.5V/800mA, 1.2V dropout at 800mA, SOIC-8 package, 120°C max junction | Not scalable to 3A; requires parallel devices or redesign for higher current | Use only for space-constrained, low-power auxiliary rails - not a drop-in replacement |
Compared with AP2302CG-2.5TRG1 and TLV1117-25CDCYR, AZ1085CD-2.5TRG1 uniquely combines 3A capability, integrated thermal shutdown, and TO252-2 (3) thermal performance - making it the sole option for compact, self-protected 2.5V/3A rails without external sensing or derating.
Availability
AZ1085CD-2.5TRG1 is available at Aetrix Electronics and suitable for microprocessor supply, battery charger post-regulation, and motherboard I/O rail applications requiring stable component supply amid obsolescence transitions.
Supply support for AZ1085CD-2.5TRG1 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 AZ1085C series was designed for high-current, low-noise linear regulation in space-constrained systems - targeting post-regulation, microprocessor core, and telecom power domains where reliability and ceramic capacitor compatibility are critical.
FAQ
Is AZ1085CD-2.5TRG1 still in active production?
No - Diodes Incorporated has marked AZ1085C as obsolete (DS36735 Rev. 4, Nov 2021). AZ1085CD-2.5TRG1 is discontinued and replaced by AZ1084C. Aetrix Electronics holds remaining authorized inventory with full traceability and offers engineering support for migration paths to pin-compatible successors.
What is the maximum allowable input voltage for AZ1085CD-2.5TRG1?
The absolute maximum input voltage is 13.2V, but recommended operating input is 4.0V to 7.0V for 2.5V output. Exceeding 7.0V increases power dissipation beyond safe limits at 3A load - e.g., at VIN = 10V, PD ≈ 22.5W exceeds TO252-2 (3) thermal capability without aggressive heatsinking.
Can AZ1085CD-2.5TRG1 be used with 10µF ceramic input and 22µF ceramic output capacitors?
Yes - the device is explicitly characterized and stabilized with ≥10µF ceramic input and ≥22µF ceramic output capacitors. Unlike older LDOs, it does not require ESR tuning or tantalum/electrolytic types, simplifying layout and improving long-term reliability.
Does the ADJ/GND pin require external connection in the fixed 2.5V version?
No - in AZ1085CD-2.5TRG1, the ADJ/GND pin (pin 3) is internally connected to ground and must be soldered to the PCB ground plane via the exposed tab for thermal and electrical integrity. No external resistor network is needed or permitted.
AZ1085CD-2.5TRG1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 12V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.5V @ 3A
- Current - Output:
- 3A
- Current - Quiescent (Iq):
- 10 mA
- Current - Supply (Max):
- -
- PSRR:
- 72dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- 0°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-252-3
AZ1085CD-2.5TRG1 FAQ
1.How can I place an order for AZ1085CD-2.5TRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ1085CD-2.5TRG1 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 AZ1085CD-2.5TRG1 reliable?
The price and inventory of AZ1085CD-2.5TRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ1085CD-2.5TRG1 is usually 5 days.
3.What payment methods are accepted for AZ1085CD-2.5TRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ1085CD-2.5TRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ1085CD-2.5TRG1?
AZ1085CD-2.5TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ1085CD-2.5TRG1 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 AZ1085CD-2.5TRG1?
For technical support, including AZ1085CD-2.5TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ1085CD-2.5TRG1 requirements.
6.How does Aetrix verify that AZ1085CD-2.5TRG1 is sourced from the original manufacturer or authorized distributors?
All AZ1085CD-2.5TRG1 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 AZ1085CD-2.5TRG1 meets industry standards.
7.What is the process for return or replacement of AZ1085CD-2.5TRG1?
All AZ1085CD-2.5TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ1085CD-2.5TRG1, 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 AZ1085CD-2.5TRG1 part is unused and in its original packaging.
Return procedure for AZ1085CD-2.5TRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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