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Diodes Incorporated AZ1084CD-1.5TRG1
- Part No.:
- AZ1084CD-1.5TRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
AZ1084CD-1.5TRG1.pdf
- Description:
- IC REG LINEAR 1.5V 5A TO252-2
- Quantity:
- Payment:
- Shipping:
Inventory:4,743
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Product details
Overview
AZ1084CD-1.5TRG1 from Diodes Incorporated is a fixed-output 1.5V, 5A low-dropout linear regulator in TO252-2 (3)/(4)/(5) package, featuring 1.35V typical dropout at full load, on-chip thermal limiting, and ±1% output voltage accuracy over 0°C to +125°C junction temperature. It delivers stable post-regulation for switching supplies and powers microprocessor core rails in embedded systems.
For engineers reviewing the AZ1084CD-1.5TRG1 datasheet, AZ1084CD-1.5TRG1 pinout, AZ1084CD-1.5TRG1 application, or AZ1084CD-1.5TRG1 equivalent, key selection criteria include dropout voltage at 5A, thermal shutdown behavior under sustained load, compatibility with low-ESR ceramic output capacitors, and fixed 1.5V output tolerance across temperature and line/load variations.
Technical Context
The AZ1084CD-1.5TRG1 uses a trimmed bandgap reference and internal current-limiting circuitry to maintain regulation under overload conditions. Its thermal protection activates when junction temperature exceeds +150°C, and it operates with input voltages up to 12V while sustaining 5A output current.
It supports stable operation with 10µF–22µF ceramic output capacitors and achieves 0.5mV typical line regulation and 3mV typical load regulation at 10mA–5A. The device exhibits 72dB PSRR at 120Hz and RMS noise of 0.003% of VOUT across 10Hz–10kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±1% (1.485V–1.515V) at 0mA–5A load, enabling direct replacement of 1.5V logic supply rails without external resistors. |
| Dropout Voltage | 1.35V typical at 4.5A, allowing operation with VIN as low as 2.85V while maintaining regulation-critical for battery-powered post-regulation. |
| Output Current | 5A continuous, supporting high-current FPGA I/O banks or multi-core processor subsystems without external pass devices. |
| Thermal Shutdown Threshold | +150°C junction temperature, with automatic recovery after cooldown-prevents permanent damage during transient overloads or poor heatsinking. |
| PSRR | 72dB at 120Hz, suppressing ripple from upstream switching converters to ensure clean power for analog-sensitive peripherals. |
| Quiescent Current | 5–10mA, minimizing no-load power loss in always-on system rails while preserving fast transient response. |
| RMS Noise | 0.003% of VOUT (≈45µV), suitable for powering low-noise ADC references or PLL power domains without additional filtering. |
Pinout & Package
Package: TO252-2 (3), TO252-2 (4), or TO252 (Type CJ) surface-mount package with exposed thermal pad for enhanced heat dissipation. Pin 1 = INPUT, Pin 2 = OUTPUT, Pin 3 = GND (fixed-output version).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (INPUT) | Unregulated input supply connection | Accepts 3.0V–12V input; requires ≥10µF ceramic input capacitor close to pin for stability and transient suppression. |
| 2 (OUTPUT) | Regulated 1.5V output node | Delivers up to 5A; connects directly to load; requires ≥10µF low-ESR ceramic capacitor with <10mΩ ESR for loop stability. |
| 3 (GND) | Power ground reference | Low-impedance return path shared by input/output capacitors and thermal pad; must be tied to PCB ground plane with multiple vias. |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout at full load | 1.35V typical at 4.5A enables use with 3.3V input rails, reducing power loss and heat generation vs. legacy 2.5V-drop regulators. |
| Integrated thermal protection | Automatic shutdown at +150°C junction temperature prevents latch-up or silicon degradation during sustained overload or airflow failure. |
| Current limiting | 6.5A foldback limit protects against short-circuit faults while limiting peak power dissipation during startup or fault conditions. |
| Ceramic capacitor compatible | Stable with 10µF–22µF X5R/X7R ceramics (ESR <10mΩ), eliminating need for costly tantalum or electrolytic capacitors and improving reliability. |
| High PSRR at low frequency | 72dB rejection at 120Hz suppresses switching ripple from buck converters, avoiding dedicated LC filters in space-constrained designs. |
Applications
| Microprocessor Core Supply | Battery Charger Post-Regulator |
|---|---|
|
Use Scenario: Powers ARM Cortex-A series CPU cores requiring tightly regulated 1.5V at up to 4.5A during burst-mode operation. IC Role / Device Role / Timing Role: Primary voltage regulator delivering low-noise, low-dropout DC power to processor VDD rail with fast transient response. Use Value: Maintains regulation during 2A/µs load transients with <100mV droop, preventing core reset or timing violations in high-performance embedded applications. |
Use Scenario: Final-stage regulation in Li-ion battery charging circuits where switching charger ICs deliver ~3.0V intermediate rail. IC Role / Device Role / Timing Role: Precision LDO providing clean 1.5V bias for fuel-gauge ICs or battery protection circuitry. Use Value: 0.003% RMS noise ensures accurate voltage measurement in coulomb-counting algorithms, improving state-of-charge estimation accuracy by >0.5%. |
| Desktop PC VRM Auxiliary Rail | FPGA I/O Bank Power |
|
Use Scenario: Supplies auxiliary 1.5V rail for DDR memory termination (VTT) or chipset PCIe buffers in compact desktop motherboards. IC Role / Device Role / Timing Role: Secondary LDO generating precise, low-noise VTT reference from main 3.3V rail. Use Value: ±1% output tolerance and 0.5mV line regulation ensure compliance with DDR4 VTT specification (1.5V ±1%), preventing signal integrity failures. |
Use Scenario: Powers LVDS or SSTL I/O banks in Xilinx Artix-7 FPGAs requiring stable 1.5V at up to 5A with minimal voltage deviation. IC Role / Device Role / Timing Role: High-current LDO delivering regulated I/O supply with low thermal resistance (θJC = 7.36°C/W) for thermal management. Use Value: Exposed thermal pad and 7.36°C/W junction-to-case resistance enable 5A operation with ≤25°C rise above ambient using 2oz copper, eliminating need for heatsinks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP1117-1.5RTV | 1A output current, 1.3V dropout at 1A, SOT-223 package | Not suitable for >2A loads; limited thermal performance in high-power density layouts | Select only for cost-sensitive, low-current (<1A) applications where board space permits larger thermal footprint. |
| LT1963AET-1.5#PBF | 1.5A output, 340mV dropout at 1.5A, SO-8EP package, 45µV RMS noise | Lower noise but insufficient current capacity; requires parallel devices for 5A, increasing BOM and layout complexity | Prefer for ultra-low-noise analog rails where current demand is ≤1.5A; avoid for digital core supplies exceeding 2A. |
Compared with AP1117-1.5RTV and LT1963AET-1.5#PBF, the AZ1084CD-1.5TRG1 uniquely combines 5A output, 1.35V dropout, and TO252 thermal performance-enabling single-device solutions for high-current digital rails where alternatives require derating, paralleling, or thermal compromises.
Availability
AZ1084CD-1.5TRG1 is available at Aetrix Electronics and suitable for microprocessor core supplies, FPGA I/O banks, and battery charger post-regulation requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for AZ1084CD-1.5TRG1 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 semiconductor manufacturer specializing in discrete, analog, and mixed-signal components for power management, signal integrity, and connectivity applications.
The AZ1084C series targets high-current linear regulation in space-constrained, thermally demanding environments-designed specifically for post-regulation, microprocessor supplies, and battery-powered systems needing robust thermal protection and ceramic capacitor compatibility.
FAQ
What is the minimum input voltage required for AZ1084CD-1.5TRG1 to maintain regulation at 5A?
The minimum input voltage is calculated as VOUT + VDROP = 1.5V + 1.35V = 2.85V. However, per recommended operating conditions, VIN must be ≥3.0V for guaranteed regulation across temperature and load. Below 3.0V, dropout margin erodes rapidly, risking instability or thermal shutdown under worst-case conditions.
Can AZ1084CD-1.5TRG1 be used with 4.7µF ceramic output capacitors?
No-4.7µF is below the minimum 10µF specified in the datasheet. Using undersized capacitance risks oscillation, poor transient response, and failure to meet load regulation specs. The device requires ≥10µF X5R/X7R ceramic (ESR <10mΩ) for guaranteed stability across all operating conditions.
Does AZ1084CD-1.5TRG1 require an external bypass capacitor on the adjust pin?
No-the AZ1084CD-1.5TRG1 is a fixed-output variant with internal resistor network; it has no ADJ pin. Only the adjustable AZ1084C-ADJ versions require external resistors and optional ADJ pin bypass capacitors. This part uses Pin 3 as GND, not ADJ.
How does the thermal shutdown behavior affect system reliability during continuous 5A operation?
With proper PCB thermal design (2oz copper, 6+ vias to inner ground planes), junction temperature remains <110°C at 5A/25°C ambient, well below the +150°C shutdown threshold. Thermal shutdown only activates during sustained overload (>6.5A) or inadequate heatsinking, acting as a fail-safe-not a normal operating mode.
AZ1084CD-1.5TRG1 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:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 12V
- Voltage - Output (Min/Fixed):
- 1.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.5V @ 4.5A
- Current - Output:
- 5A
- 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
AZ1084CD-1.5TRG1 FAQ
1.How can I place an order for AZ1084CD-1.5TRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ1084CD-1.5TRG1 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 AZ1084CD-1.5TRG1 reliable?
The price and inventory of AZ1084CD-1.5TRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ1084CD-1.5TRG1 is usually 5 days.
3.What payment methods are accepted for AZ1084CD-1.5TRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ1084CD-1.5TRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ1084CD-1.5TRG1?
AZ1084CD-1.5TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ1084CD-1.5TRG1 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 AZ1084CD-1.5TRG1?
For technical support, including AZ1084CD-1.5TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ1084CD-1.5TRG1 requirements.
6.How does Aetrix verify that AZ1084CD-1.5TRG1 is sourced from the original manufacturer or authorized distributors?
All AZ1084CD-1.5TRG1 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 AZ1084CD-1.5TRG1 meets industry standards.
7.What is the process for return or replacement of AZ1084CD-1.5TRG1?
All AZ1084CD-1.5TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ1084CD-1.5TRG1, 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 AZ1084CD-1.5TRG1 part is unused and in its original packaging.
Return procedure for AZ1084CD-1.5TRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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