My Inquiry
My Account
Diodes Incorporated AZ1085CS2-3.3TRG1
- Part No.:
- AZ1085CS2-3.3TRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
AZ1085CS2-3.3TRG1.pdf
- Description:
- IC REG LINEAR 3.3V 3A TO263-2
- Quantity:
- Payment:
- Shipping:
Inventory:3,066
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AZ1085CS2-3.3TRG1 from Diodes Incorporated is a 3A low-dropout linear regulator in TO263-2 package, delivering fixed 3.3V output with typical dropout voltage of 1.3V at full load, thermal shutdown protection, and ±1% output voltage accuracy over 0°C to +125°C junction temperature. It serves as a post-regulator for switching supplies and microprocessor core supply in telecom and set-top box power systems.
For engineers reviewing the AZ1085CS2-3.3TRG1 datasheet, AZ1085CS2-3.3TRG1 pinout, AZ1085CS2-3.3TRG1 application, or AZ1085CS2-3.3TRG1 equivalent, key selection criteria include dropout voltage at 3A, thermal resistance (θJC = 6.34°C/W), compatibility with low-ESR ceramic capacitors, and fixed-output stability under transient load conditions up to 3A.
Technical Context
The AZ1085CS2-3.3TRG1 integrates a precision bandgap reference (1.225–1.275V), current-limit circuit (4.5A typ), and on-chip thermal shutdown. Its architecture supports stable regulation with input voltages from 4.8V to 8V and maintains ≤0.1% load regulation across 0–3A output current.
Designed for high-current linear regulation, it features 72dB PSRR at 120Hz, 0.003% RMS output noise, and operates with minimum 3mA load current. The TO263-2 package provides exposed tab for thermal conduction and supports surface-mount reflow assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1% (3.234–3.366V) at 10mA–3A, enabling direct replacement of standard 3.3V logic rails. |
| Dropout Voltage | 1.3V typical at 3A load, allowing operation with only 4.6V input for reliable 3.3V output under full load. |
| Current Limit | 4.5A typical, providing robust short-circuit protection without external current-sense components. |
| Thermal Resistance θJC | 6.34°C/W (TO263-2), enabling >10W power dissipation before junction exceeds 125°C at 25°C case temperature. |
| Line Regulation | 0.5mV typical (0.015% at 10mA), ensuring <±0.5mV output shift over 4.8–10V input range. |
| Load Regulation | 7mV typical (0.1% at 10mA), maintaining <±7mV output deviation from no-load to 3A full load. |
| PSRR | 72dB at 120Hz, suppressing ripple from upstream switching converters feeding its input. |
Pinout & Package
Package: TO263-2 (D²PAK-2), thermally enhanced surface-mount package with exposed metal tab for heatsinking. Dimensions: 14.61 × 9.65 × 2.64 mm (L×W×H), lead-free and RoHS-compliant (G1 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (INPUT) | Input voltage terminal | Accepts 4.8–8V DC input; requires ≥10µF low-ESR ceramic capacitor placed near pin for stability. |
| 2 (OUTPUT) | Regulated 3.3V output | Delivers up to 3A continuous current; connects directly to load and output capacitor (≥22µF ceramic). |
| 3 (GND) | Ground reference and thermal path | Common return for internal circuitry and primary thermal conduction path via exposed tab to PCB copper pour. |
Key Features
| Feature | Design Value |
|---|---|
| Low ESR capacitor compatibility | Stable with ceramic output capacitors ≥22µF, eliminating need for electrolytic or tantalum types. |
| Integrated thermal shutdown | Activates at +150°C junction temperature, latching off until die cools to ~135°C, preventing permanent damage. |
| High PSRR at low frequency | 72dB rejection at 120Hz enables clean 3.3V rail even when powered from noisy switcher outputs. |
| Precision reference stability | Reference voltage drift ≤0.5% over temperature and 1000-hour life, ensuring long-term output accuracy. |
| Lead-free & halogen-free construction | G1 suffix denotes fully RoHS 3 compliant, antimony- and halogen-free "Green" molding compound. |
Applications
| Telecom Power Supply | Microprocessor Core Supply |
|---|---|
Use Scenario: Point-of-load regulation for baseband processors in 4G/5G small cells requiring clean, low-noise 3.3V supply. IC Role / Device Role / Timing Role: Primary linear post-regulator converting intermediate 5V bus to stable 3.3V core voltage. Use Value: 0.003% RMS noise and 72dB PSRR ensure minimal clock jitter and digital logic integrity under dynamic load. |
Use Scenario: Powering ARM Cortex-A series SoCs in industrial gateways where switching noise must be avoided. IC Role / Device Role / Timing Role: Fixed-output LDO supplying I/O and peripheral voltage domain with fast transient response. Use Value: 7mV load regulation and 100µs transient recovery time maintain voltage within ±3% during 1A step load changes. |
| Battery Charger Management | DVD/Blu-ray Player Logic Rail |
Use Scenario: Regulating charging controller bias voltage in multi-cell Li-ion charger modules. IC Role / Device Role / Timing Role: Providing isolated 3.3V auxiliary supply for charger IC communication and status monitoring. Use Value: Thermal shutdown and 4.5A current limit protect against fault conditions during battery fault detection cycles. |
Use Scenario: Generating 3.3V for DVD player system-on-chip, audio DAC, and HDMI interface logic. IC Role / Device Role / Timing Role: Low-noise local regulator decoupling sensitive analog and digital subsystems. Use Value: Compatible with 10µF–22µF ceramic capacitors, reducing board area and eliminating electrolytic aging concerns. |
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 |
|---|---|---|---|
| AP2303WG-7 | 2.5A max output, 0.6V dropout at 1.5A, SOT-223 package (θJA = 120°C/W) | Limited to lower current and higher thermal resistance; unsuitable for sustained 3A loads | Select only for space-constrained designs with <2A peak demand and adequate PCB copper area |
| MIC29302WU | 3A output, 0.4V dropout at 3A, TO263-3 package with ADJ pin; requires external resistors for 3.3V | Adjustable architecture adds BOM cost and layout complexity vs. fixed 3.3V AZ1085CS2-3.3TRG1 | Prefer when programmable output or tighter dropout (<1.0V) is required despite added design overhead |
Compared with AP2303WG-7 and MIC29302WU, AZ1085CS2-3.3TRG1 delivers verified 3A capability with fixed 3.3V output in TO263-2, eliminating resistor networks while offering superior thermal performance (θJC = 6.34°C/W) for high-power density applications.
Availability
AZ1085CS2-3.3TRG1 is available at Aetrix Electronics and suitable for telecom equipment, set-top boxes, and industrial embedded systems requiring stable component supply with long-lifecycle support.
Supply support for AZ1085CS2-3.3TRG1 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 belongs to Diodes' high-current LDO portfolio, designed specifically for post-regulation in mixed-signal systems where low noise, thermal robustness, and fixed-output simplicity are critical.
FAQ
What is the maximum input voltage for AZ1085CS2-3.3TRG1?
The absolute maximum input voltage is 13.2V, but the recommended operating range is 4.8V to 8V for the 3.3V fixed version. Exceeding 8V increases power dissipation and thermal stress without functional benefit, as the device is optimized for low-dropout operation within this window.
Can AZ1085CS2-3.3TRG1 be used with ceramic output capacitors?
Yes - it is explicitly characterized and stable with low-ESR ceramic capacitors ≥22µF. The datasheet confirms no minimum ESR requirement, eliminating the need for damping resistors or electrolytic/tantalum alternatives typically required by older LDO architectures.
Does AZ1085CS2-3.3TRG1 require an external bypass capacitor on the adjust pin?
No - the AZ1085CS2-3.3TRG1 is a fixed-output variant; it has no adjust pin. Pin 3 is GND, not ADJ. Only the AZ1085C-ADJ version includes an adjust pin requiring external resistor network and optional 10nF bypass.
Is AZ1085CS2-3.3TRG1 still in active production?
No - Diodes Incorporated has marked AZ1085C as obsolete (DS36735 Rev. 4, November 2021). Aetrix Electronics maintains limited legacy stock and supports design-in continuity, but recommends migration to AZ1084C for new designs per manufacturer guidance.
AZ1085CS2-3.3TRG1 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 @ 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-263
AZ1085CS2-3.3TRG1 FAQ
1.How can I place an order for AZ1085CS2-3.3TRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ1085CS2-3.3TRG1 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 AZ1085CS2-3.3TRG1 reliable?
The price and inventory of AZ1085CS2-3.3TRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ1085CS2-3.3TRG1 is usually 5 days.
3.What payment methods are accepted for AZ1085CS2-3.3TRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ1085CS2-3.3TRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ1085CS2-3.3TRG1?
AZ1085CS2-3.3TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ1085CS2-3.3TRG1 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 AZ1085CS2-3.3TRG1?
For technical support, including AZ1085CS2-3.3TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ1085CS2-3.3TRG1 requirements.
6.How does Aetrix verify that AZ1085CS2-3.3TRG1 is sourced from the original manufacturer or authorized distributors?
All AZ1085CS2-3.3TRG1 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 AZ1085CS2-3.3TRG1 meets industry standards.
7.What is the process for return or replacement of AZ1085CS2-3.3TRG1?
All AZ1085CS2-3.3TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ1085CS2-3.3TRG1, 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 AZ1085CS2-3.3TRG1 part is unused and in its original packaging.
Return procedure for AZ1085CS2-3.3TRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AZ1085CS2-3.3TRG1 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…
