My Inquiry
My Account
Diodes Incorporated AZ1084CS-1.8TRE1
- Part No.:
- AZ1084CS-1.8TRE1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-263-4, D2PAK (3 Leads + Tab), TO-263AA
- Datasheet:
-
AZ1084CS-1.8TRE1.pdf
- Description:
- IC REG LINEAR 1.8V 5A TO263
- Quantity:
- Payment:
- Shipping:
Inventory:1,479
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AZ1084CS-1.8TRE1 from Diodes Incorporated is a fixed-output 1.8V, 5A low-dropout linear regulator in TO252-2 (3) package, featuring 1.35V typical dropout at full load, on-chip thermal limiting, and ±1% output voltage accuracy over 0°C to +125°C. It delivers stable post-regulation for switching supplies and powers microprocessor cores in embedded systems requiring high-current, low-noise DC rails.
For engineers reviewing the AZ1084CS-1.8TRE1 datasheet, AZ1084CS-1.8TRE1 pinout, AZ1084CS-1.8TRE1 application, or AZ1084CS-1.8TRE1 equivalent, key selection criteria include dropout voltage at 5A, thermal shutdown behavior under sustained load, compatibility with ceramic output capacitors, and fixed-voltage stability across temperature and line/load variations.
Technical Context
The AZ1084CS-1.8TRE1 uses a trimmed bandgap reference and internal current-limiting circuitry to maintain regulation under overload conditions. Its architecture integrates fixed resistors for 1.8V output, eliminating external feedback components and reducing PCB footprint versus adjustable variants.
Thermal protection activates when junction temperature exceeds +150°C, and the device operates within 0°C to +125°C junction range. It supports low-ESR ceramic capacitors (10µF–22µF) on input and output, enabling fast transient response without electrolytic bulk capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8V ±1% (1.764V to 1.836V) at 10mA–5A load, ensuring core logic compliance for 1.8V I/O domains. |
| Dropout Voltage | 1.35V typical at 4.5A, enabling operation from 3.15V input - critical for battery-powered 3.3V rail post-regulation. |
| Output Current | 5A continuous, supporting high-power FPGA I/O banks or multi-core SoC subsystems without external pass devices. |
| Current Limit | 6.5A minimum, providing robust short-circuit protection while allowing brief inrush during power-up sequencing. |
| Line Regulation | ≤6mV over 3.3V–10V input range, minimizing supply-induced noise in sensitive analog or RF subsystems. |
| Load Regulation | ≤20mV from 0mA to 5A, maintaining voltage integrity during dynamic CPU load transitions. |
| PSRR | 72dB at 120Hz, suppressing ripple from upstream switching converters feeding the LDO input. |
Pinout & Package
Package: TO252-2 (3), surface-mount, thermally enhanced DPAK variant with exposed drain pad for heatsinking. Pin 1 = INPUT, Pin 2 = OUTPUT, Pin 3 = GND (common for fixed-output version).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (INPUT) | Unregulated Input Supply | Accepts 3.3V–10V input; requires ≥10µF low-ESR ceramic capacitor placed within 5mm for stability. |
| 2 (OUTPUT) | Regulated 1.8V Output | Delivers up to 5A; connects directly to load; requires ≥10µF ceramic output capacitor for transient response. |
| 3 (GND) | Power Ground Reference | Common return path for input/output; must be tied to thermal pad for optimal θJC = 7.36°C/W performance. |
Key Features
| Feature | Design Value |
|---|---|
| Low Dropout Operation | 1.35V typical at 5A enables use with 3.3V input rails where headroom is constrained. |
| Integrated Thermal Protection | Automatic shutdown at TJ > +150°C prevents permanent damage during sustained overload or poor heatsinking. |
| Ceramic Capacitor Compatibility | Stable with 10µF–22µF X5R/X7R ceramics, eliminating need for bulky tantalum or aluminum electrolytics. |
| Fixed 1.8V Output | No external resistors required - reduces BOM count, layout area, and calibration uncertainty. |
| RMS Output Noise | 0.003% of VOUT (≈0.54µV RMS) supports noise-sensitive analog peripherals and PLL power domains. |
Applications
| Microprocessor Core Supply | Battery Charger Post-Regulator |
|---|---|
|
Use Scenario: Powers ARM Cortex-A series CPU cores requiring tightly regulated 1.8V at up to 4.5A peak current. IC Role / Device Role / Timing Role: Primary voltage regulator delivering clean, low-noise power to processor VDD_CORE domain. Use Value: Maintains <±1% output accuracy across -40°C to +85°C ambient, preventing timing violations during thermal cycling. |
Use Scenario: Final-stage regulation after buck converter in USB-C PD battery charger for Li-ion packs. IC Role / Device Role / Timing Role: Low-noise post-regulator isolating sensitive charging IC control logic from switching ripple. Use Value: 72dB PSRR at 120Hz suppresses switching artifacts, improving charge termination accuracy by >0.5%. |
| Industrial PLC I/O Module | Network Switch PHY Power |
|
Use Scenario: Supplies 1.8V to isolated digital I/O drivers in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: High-current local regulator for field-side interface ICs operating in harsh 0°C–+70°C environments. Use Value: 6.5A current limit withstands momentary short circuits on 24V field wiring without latch-up. |
Use Scenario: Powers 1.8V SerDes lanes and MDIO interfaces in 1GbE/2.5GbE Ethernet switch ASICs. IC Role / Device Role / Timing Role: Low-noise, high-PSRR supply for high-speed transceiver analog front-ends. Use Value: 0.003% RMS noise ensures <10⁻¹² BER in 2.5Gbps NRZ links under full packet load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP1084K-18L-U | Same 1.8V/5A rating but TO220-3 package; higher θJA (50°C/W vs. 100°C/W for TO252); no thermal pad. | Requires external heatsink for >2A continuous; unsuitable for space-constrained SMT designs. | Select only if through-hole mounting and manual heatsink attachment are acceptable. |
| TLV1117-18CDCYR | 1.8V/800mA max; SOIC-8 package; 1.2V dropout at 800mA; lower quiescent current (5mA vs. 10mA). | Cannot support >1A loads; insufficient for microprocessor core rails or high-current I/O modules. | Use only for low-power auxiliary rails where 5A capability is unnecessary. |
Compared with AP1084K-18L-U and TLV1117-18CDCYR, the AZ1084CS-1.8TRE1 uniquely combines 5A output, TO252 thermal efficiency, and fixed 1.8V accuracy in a single SMT package - making it the only viable choice for compact, high-current 1.8V regulation without external thermal management.
Availability
AZ1084CS-1.8TRE1 is available at Aetrix Electronics and suitable for microprocessor core supplies, industrial PLC I/O modules, and network switch PHY power requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant manufacturing.
Supply support for AZ1084CS-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 ICs, with design centers across Asia, Europe, and the U.S., and manufacturing in IATF 16949-certified facilities.
The AZ1084C series belongs to Diodes' high-current LDO portfolio, engineered specifically for post-regulation in power-dense embedded systems where thermal efficiency, ceramic capacitor compatibility, and tight output tolerance are mandatory.
FAQ
What is the minimum input voltage required for stable 1.8V output at 5A?
The AZ1084CS-1.8TRE1 requires a minimum input voltage of 3.15V to maintain regulation at 5A, based on its 1.35V typical dropout voltage. At 3.3V input, it delivers full 5A with margin; operation below 3.15V risks dropout and unregulated output collapse.
Can this device replace an adjustable AZ1084C-ADJ in an existing design?
No - the AZ1084CS-1.8TRE1 is a fixed-output variant with pins reconfigured for INPUT/OUTPUT/GND; it lacks the ADJ pin and internal resistor divider of the adjustable version. Layout redesign and schematic changes are required for substitution.
Is thermal pad connection to PCB ground required for reliable operation?
Yes - the exposed thermal pad (Pin 3 in TO252-2 (3)) must be soldered to a minimum 100mm² copper pour tied to GND. Without this, θJA rises significantly, causing premature thermal shutdown above ~3A at +70°C ambient.
Does this part support automotive AEC-Q100 qualification?
No - the AZ1084CS-1.8TRE1 is not AEC-Q100 qualified. Diodes offers the AZ1084CD-1.8TRG1 variant with automotive-grade screening and PPAP support; consult Diodes' automotive product definitions for qualification details.
AZ1084CS-1.8TRE1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-263-4, D2PAK (3 Leads + Tab), TO-263AA
- 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):
- 1.8V
- 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
AZ1084CS-1.8TRE1 FAQ
1.How can I place an order for AZ1084CS-1.8TRE1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ1084CS-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 AZ1084CS-1.8TRE1 reliable?
The price and inventory of AZ1084CS-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 AZ1084CS-1.8TRE1 is usually 5 days.
3.What payment methods are accepted for AZ1084CS-1.8TRE1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ1084CS-1.8TRE1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ1084CS-1.8TRE1?
AZ1084CS-1.8TRE1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ1084CS-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 AZ1084CS-1.8TRE1?
For technical support, including AZ1084CS-1.8TRE1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ1084CS-1.8TRE1 requirements.
6.How does Aetrix verify that AZ1084CS-1.8TRE1 is sourced from the original manufacturer or authorized distributors?
All AZ1084CS-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 AZ1084CS-1.8TRE1 meets industry standards.
7.What is the process for return or replacement of AZ1084CS-1.8TRE1?
All AZ1084CS-1.8TRE1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ1084CS-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 AZ1084CS-1.8TRE1 part is unused and in its original packaging.
Return procedure for AZ1084CS-1.8TRE1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AZ1084CS-1.8TRE1 Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
