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Diodes Incorporated AZ1084CS2-3.3TRE1
- Part No.:
- AZ1084CS2-3.3TRE1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
AZ1084CS2-3.3TRE1.pdf
- Description:
- IC REG LINEAR 3.3V 5A TO263-2
- Quantity:
- Payment:
- Shipping:
Inventory:1,736
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Product details
Overview
AZ1084CS2-3.3TRE1 from Diodes Incorporated is a fixed-output 3.3V, 5A low-dropout linear regulator in TO252-2 (3) package with 1.35V typical dropout at full load, thermal shutdown and current limiting, designed for post-regulation of switching supplies and microprocessor core power delivery in desktop PCs and embedded systems.
For engineers reviewing the AZ1084CS2-3.3TRE1 datasheet, AZ1084CS2-3.3TRE1 pinout, AZ1084CS2-3.3TRE1 application, or AZ1084CS2-3.3TRE1 equivalent, key selection criteria include output voltage accuracy (±1% over temperature), compatibility with low-ESR ceramic capacitors, junction temperature range (0°C to +125°C), and thermal resistance (θJC = 7.36°C/W).
Technical Context
The AZ1084CS2-3.3TRE1 implements a trimmed bandgap reference with internal resistor divider for fixed 3.3V output, integrated current-limit circuit (6.5A typical), and on-chip thermal limiting that forces shutdown above +150°C junction temperature. It operates with input voltages up to 12V and requires no external components for regulation.
Its architecture supports stable operation with 10µF–22µF ceramic output capacitance, achieves 72dB PSRR at 120Hz under 5A load, and maintains ±0.1% load regulation across 0–5A output current with 3V headroom. Line regulation is specified at ±0.5mV over 4.8V–10V input range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1% (3.234V–3.366V) at 10mA–5A load and 4.8V–8V input |
| Dropout Voltage | 1.35V typical at 4.5A; enables regulation with only 4.65V input for 3.3V output |
| Output Current | Continuous 5A DC output with internal current limit set to 6.5A typical |
| Thermal Protection | Automatic shutdown at +150°C junction temperature; resumes after cooldown |
| PSRR | 72dB at 120Hz with 25µF tantalum output cap and 5A load |
| Load Regulation | ±7mV (0.2%) from 0mA to 5A load at fixed 3.3V output |
| Operating Junction Temp | 0°C to +125°C continuous operation; absolute max +150°C |
Pinout & Package
AZ1084CS2-3.3TRE1 uses the TO252-2 (3) surface-mount package (also known as DPAK), featuring a thermally enhanced exposed drain pad for PCB heat sinking. Pin 1 is INPUT, Pin 2 is OUTPUT, Pin 3 is GND (not ADJ - fixed version).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (INPUT) | Regulator input supply connection | Accepts 4.8V–12V DC; must be decoupled with ≥10µF ceramic capacitor near pin |
| 2 (OUTPUT) | Regulated 3.3V output node | Delivers up to 5A; requires ≥10µF low-ESR ceramic capacitor directly at pin for stability |
| 3 (GND) | Power ground reference and thermal path | Connected to exposed metal tab; must be soldered to large copper pour for θJA ≤ 100°C/W |
Key Features
| Feature | Design Value |
|---|---|
| Low ESR capacitor support | Stable with 10µF ceramic output cap (no electrolytic required), reducing board area and improving transient response |
| Thermal shutdown recovery | Hysteresis ensures safe restart only after junction cools below +140°C, preventing thermal cycling damage |
| Lead-free & RoHS 3 compliant | Fully compliant with EU Directive 2015/863/EU; <900ppm Br+Cl, <1000ppm Sb; matte tin plating |
| High PSRR at low frequency | 60–72dB rejection of 120Hz ripple from upstream switching converters, critical for noise-sensitive digital loads |
| Trimmed reference accuracy | 1.225V–1.270V internal bandgap reference ensures tight 3.3V output tolerance without external trimming |
Applications
| Microprocessor Core Supply | Battery Charger Post-Regulation |
|---|---|
Use Scenario: Providing clean, low-noise 3.3V power to ARM Cortex-A/RISC-V SoCs in industrial gateways. IC Role / Device Role / Timing Role: Primary LDO delivering stable core voltage with fast transient response to CPU load steps. Use Value: Maintains ±7mV output deviation during 0–5A load transients, preventing logic errors or brownouts in high-performance embedded processors. |
Use Scenario: Final-stage regulation after buck converter in 5V-input Li-ion battery charger for portable medical devices. IC Role / Device Role / Timing Role: Low-noise post-regulator ensuring precise 3.3V bias for fuel gauging ICs and USB interface controllers. Use Value: 72dB PSRR suppresses switching ripple from upstream DC-DC stage, enabling accurate ADC measurements and reliable USB enumeration. |
| Desktop PC Standby Rail | Industrial I/O Module Power |
Use Scenario: Generating always-on 3.3V standby power for wake-on-LAN, RTC, and management controllers in ATX motherboards. IC Role / Device Role / Timing Role: High-current LDO supplying 3.3VSB rail with thermal robustness across ambient temperatures from –20°C to +70°C. Use Value: Operates continuously at 2A load with <15°C rise above ambient using standard 2oz copper, eliminating need for heatsinks. |
Use Scenario: Powering isolated CAN transceivers, analog sensor front-ends, and FPGA configuration banks in programmable logic controllers. IC Role / Device Role / Timing Role: Single-point 3.3V source for mixed-signal subsystems requiring low noise and high reliability. Use Value: ±0.5mV line regulation ensures consistent ADC reference and transceiver VCC despite input bus fluctuations from 5V to 12V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3.3V, 5A LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| APL5302-33BI-TRG1 | Higher dropout (1.6V typ at 5A); lower PSRR (65dB @120Hz); same TO252-3 package | Limited headroom margin in 5V-input systems; less effective ripple suppression | Choose only if cost sensitivity outweighs performance requirements and input voltage >6.9V is guaranteed |
| LD1085V33TR | Wider input range (up to 30V); higher quiescent current (10mA vs 5mA); TO220 package | Requires heatsink above 2A; unsuitable for space-constrained SMT designs | Select when input may exceed 12V or through-hole mounting is mandated; avoid for compact 5A SMT layouts |
Compared with APL5302-33BI-TRG1 and LD1085V33TR, AZ1084CS2-3.3TRE1 delivers superior dropout performance and PSRR in a thermally optimized SMT package, making it optimal for high-density, low-noise 5V-input systems where thermal headroom and ripple rejection are critical.
Availability
AZ1084CS2-3.3TRE1 is available at Aetrix Electronics and suitable for microprocessor core supplies, battery charger post-regulation, and industrial I/O module power requiring stable component supply, long-term lifecycle support, and RoHS 3 compliance.
Supply support for AZ1084CS2-3.3TRE1 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 design centers across Asia, Europe, and the US, and ISO 9001/IATF 16949 certified manufacturing.
The AZ1084C series targets high-current, low-noise linear regulation in computing, industrial, and consumer power systems, emphasizing thermal robustness, ceramic capacitor compatibility, and automotive-grade reliability readiness.
FAQ
What is the minimum input voltage required for AZ1084CS2-3.3TRE1 to maintain regulation at 5A?
The minimum input voltage is calculated as VOUT + VDROP = 3.3V + 1.5V = 4.8V (maximum dropout). At 4.5A load, typical dropout is 1.35V, so 4.65V input sustains regulation. Operation below 4.8V risks dropout-induced output collapse under full load.
Can AZ1084CS2-3.3TRE1 be used with 4.7µF ceramic output capacitors?
No - the datasheet specifies minimum 10µF ceramic capacitance for stability. Using 4.7µF risks oscillation or poor transient response due to insufficient phase margin; 22µF is recommended for worst-case 5A step loads.
Does AZ1084CS2-3.3TRE1 require an input bypass capacitor?
Yes - a minimum 10µF low-ESR ceramic capacitor must be placed within 5mm of the INPUT and GND pins. This prevents input rail sag during load transients and ensures stable loop operation; absence causes startup overshoot and potential instability.
Is AZ1084CS2-3.3TRE1 qualified for automotive applications per AEC-Q100?
No - AZ1084CS2-3.3TRE1 is not AEC-Q100 qualified. Diodes offers the pin-compatible AZ1084CQ series (e.g., AZ1084CQ-3.3TRE1) for automotive use, which undergoes extended temperature testing, PPAP documentation, and IATF 16949 manufacturing controls.
AZ1084CS2-3.3TRE1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- 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):
- 3.3V
- 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-263
AZ1084CS2-3.3TRE1 FAQ
1.How can I place an order for AZ1084CS2-3.3TRE1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ1084CS2-3.3TRE1 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 AZ1084CS2-3.3TRE1 reliable?
The price and inventory of AZ1084CS2-3.3TRE1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ1084CS2-3.3TRE1 is usually 5 days.
3.What payment methods are accepted for AZ1084CS2-3.3TRE1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ1084CS2-3.3TRE1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ1084CS2-3.3TRE1?
AZ1084CS2-3.3TRE1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ1084CS2-3.3TRE1 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 AZ1084CS2-3.3TRE1?
For technical support, including AZ1084CS2-3.3TRE1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ1084CS2-3.3TRE1 requirements.
6.How does Aetrix verify that AZ1084CS2-3.3TRE1 is sourced from the original manufacturer or authorized distributors?
All AZ1084CS2-3.3TRE1 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 AZ1084CS2-3.3TRE1 meets industry standards.
7.What is the process for return or replacement of AZ1084CS2-3.3TRE1?
All AZ1084CS2-3.3TRE1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ1084CS2-3.3TRE1, 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 AZ1084CS2-3.3TRE1 part is unused and in its original packaging.
Return procedure for AZ1084CS2-3.3TRE1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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