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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Diodes Incorporated AZ1117R-3.3TRE1

Name: AZ1117R-3.3TRE1
Brand: Diodes Incorporated
SKU: AZ1117R-3.3TRE1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AZ1117R-3.3TRE1

Manufacturer:: Diodes Incorporated

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: TO-243AA

Datasheet:: AZ1117R-3.3TRE1.pdf

Description:: IC REG LINEAR 3.3V 1.25A SOT89

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Inventory:1,517

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Product details

Overview

AZ1117R-3.3TRE1 from Diodes Incorporated is a fixed-output 3.3V, 1A low-dropout linear regulator in SOT89 package, featuring 1.15V dropout at full load, ±1% output voltage accuracy over temperature and load, integrated thermal shutdown and current limiting, and operation from −40°C to +125°C junction temperature - used for stable 3.3V supply in PC motherboard VRMs and peripheral power rails.

For engineers reviewing the AZ1117R-3.3TRE1 datasheet, AZ1117R-3.3TRE1 pinout, AZ1117R-3.3TRE1 application, or AZ1117R-3.3TRE1 equivalent, key selection criteria include dropout voltage at 1A, output accuracy tolerance, thermal resistance (θ_JA = 165°C/W), SOT89 pin compatibility with legacy LDO footprints, and RoHS-compliant lead-free construction.

Technical Context

The AZ1117R-3.3TRE1 implements a bandgap-referenced error amplifier with internal current-limiting circuitry and thermal foldback protection. Its trimmed reference ensures 3.3V output remains within ±1% across −40°C to +125°C and 10mA–1A load range.

It operates as a three-terminal fixed-voltage regulator with no external feedback components required. Dropout behavior is characterized at ∆V_OUT = 1%, with V_IN minimum of 4.75V for full 1A output at 3.3V.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	3.3V ±1% (10mA–1A, −40°C to +125°C) - guarantees logic-level compliance for 3.3V digital ICs without recalibration.
Dropout Voltage	1.15V at 1A - enables regulation from 4.45V input, supporting single-cell LiFePO₄ or 5V rail derating.
Load Regulation	≤10mV (10mA to 1A) - maintains stable voltage under dynamic CPU/GPU core load transients.
Ripple Rejection	60–75dB at 120Hz - suppresses switching noise from upstream DC/DC converters feeding the LDO input.
Thermal Shutdown	Activates at +150°C junction temperature with +25°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking.
Quiescent Current	5–10mA - minimizes no-load power loss in always-on system rails like RTC or standby domains.
Package Thermal Resistance	θ_JA = 165°C/W (SOT89) - defines maximum power dissipation (≈450mW at T_A = 70°C) before thermal limiting engages.

Pinout & Package

SOT89-3 package: surface-mount, 3-pin, single-row, exposed thermal pad (not electrically connected), JEDEC MO-203AA compliant. Pin 1 = OUTPUT, Pin 2 = INPUT, Pin 3 = GND.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (OUTPUT)	Regulated 3.3V output node	Connects directly to load capacitance (≥10µF ceramic/tantalum); requires low-ESR capacitor for stability and transient response.
Pin 2 (INPUT)	Unregulated input supply input	Must be ≥4.75V and ≤15V; requires local 1µF ceramic decoupling close to pin to suppress high-frequency noise.
Pin 3 (GND)	Power ground reference	Shared return path for input and output capacitors; must connect to low-impedance ground plane to minimize noise coupling and thermal resistance.

Key Features

Feature	Design Value
Fixed 3.3V output	Eliminates external resistor divider, reducing BOM count and layout area versus adjustable LDOs.
1.15V dropout @ 1A	Enables higher efficiency than legacy 78xx regulators in 5V-to-3.3V conversion, lowering heat sink requirements.
±1% output accuracy	Meets tight tolerance requirements for FPGA I/O banks, DDR memory termination, and USB PHY supplies.
Integrated thermal shutdown	Self-protects during solder reflow, short-circuit events, or ambient temperature excursions without external circuitry.
Lead-free & RoHS compliant	Meets EU Directive 2015/863/EU (RoHS 3); compatible with standard Pb-free reflow profiles (peak 260°C).

Applications

PC Motherboard Power

LCD Monitor Logic Supply

Use Scenario: Providing clean 3.3V to southbridge I/O, SMBus controllers, and BIOS flash memory on ATX motherboards.

IC Role / Device Role / Timing Role: Primary post-regulator for 5V rail conditioning; delivers low-noise, ripple-free voltage to sensitive digital interfaces.

Use Value: 75dB PSRR at 120Hz rejects noise from ATX PSU rectifier stages, preventing data corruption in SPI/I²C communications.

Use Scenario: Supplying 3.3V to timing controller (TCON) and display interface ICs in 24-inch LCD panels.

IC Role / Device Role / Timing Role: Local point-of-load regulator adjacent to TCON ASIC; handles fast load steps during frame refresh.

Use Value: 10mV load regulation ensures consistent gamma correction voltage, eliminating visible brightness flicker during video playback.

Graphic Card Auxiliary Rail

ADSL Modem PHY Supply

Use Scenario: Generating 3.3V for PCIe slot detection, hot-plug controllers, and auxiliary logic on discrete GPU PCBs.

IC Role / Device Role / Timing Role: Standby-domain regulator powered from +5VSB; remains active during GPU sleep states.

Use Value: 5mA quiescent current minimizes standby power draw while maintaining PCIe link training readiness.

Use Scenario: Powering ADSL line driver and analog front-end (AFE) circuits in residential DSL modems.

IC Role / Device Role / Timing Role: Low-noise analog supply rail isolated from noisy digital processor domain.

Use Value: 0.003% RMS output noise prevents SNR degradation in upstream/downstream signal paths, preserving line sync stability.

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-output LDO applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MIC29302-3.3WT	Higher dropout (0.4V typ. @ 3A), TO220-5 package, 0.2% initial accuracy	Supports higher current (3A) but requires larger footprint and heatsink; better for high-power analog sections	Select when >1A continuous load or tighter initial accuracy is required; not drop-in due to pinout and thermal design differences
AP2204K-3.3TRG1	Lower I_Q (1.5µA), SOT23-5 package, 2% accuracy, no thermal shutdown	Optimized for ultra-low-power battery-backed systems; lacks overtemperature protection	Choose only for always-off or energy-harvesting applications where thermal fault coverage is managed externally

Compared with MIC29302-3.3WT and AP2204K-3.3TRG1, the AZ1117R-3.3TRE1 balances cost-effective SOT89 integration, guaranteed thermal safety, and precision suitable for industrial-grade embedded power - making it optimal for mid-current, reliability-critical 3.3V rails where space and protection are constrained.

Availability

AZ1117R-3.3TRE1 is available at Aetrix Electronics and suitable for PC motherboard power delivery, LCD monitor logic supplies, and ADSL modem PHY rails requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for AZ1117R-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 company specializing in discrete, analog, and mixed-signal devices, with manufacturing ISO/TS 16949-certified facilities and broad distribution networks.

The AZ1117 series targets cost-sensitive, high-volume power management applications in computing, consumer, and networking equipment - delivering robust LDO performance in industry-standard packages without premium pricing.

FAQ

What is the minimum input voltage required for AZ1117R-3.3TRE1 to maintain regulation at 1A?

The minimum input voltage is 4.75V, derived from the 3.3V nominal output plus the 1.15V dropout voltage at 1A load. Operation below this voltage causes output collapse; datasheet specifies VIN ≥ 4.75V for full 1A output across temperature and process variation.

Can AZ1117R-3.3TRE1 replace older AZ1117-3.3 versions in existing designs?

Yes - AZ1117R-3.3TRE1 is a direct replacement for prior SOT89-packaged AZ1117-3.3 variants, retaining identical pinout, electrical specs, and thermal characteristics. The "R" denotes SOT89 package and "TRE1" confirms RoHS-compliant tape-and-reel packaging.

Is an input capacitor mandatory, and what value is recommended?

Yes, a minimum 1µF ceramic capacitor is required at the INPUT pin to ensure stability and suppress high-frequency noise. Diodes recommends X5R/X7R dielectric with ≤100mΩ ESR; placement within 2mm of the pin is critical to prevent oscillation under transient loads.

Does AZ1117R-3.3TRE1 support reverse-voltage protection?

No - the device lacks intrinsic reverse-battery or reverse-polarity protection. Applying negative voltage to INPUT or OUTPUT relative to GND may cause latch-up or permanent damage. External series diode or MOSFET-based protection must be added if reverse polarity is possible in the system.

AZ1117R-3.3TRE1 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: AZ1117

Package/Case:: TO-243AA

Packaging:: Tape & Reel (TR)

Product Status:: Active

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 15V

Voltage - Output (Min/Fixed):: 3.3V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 1.25V @ 1A

Current - Output:: 1.25A

Current - Quiescent (Iq):: 10 mA

Current - Supply (Max):: -

PSRR:: 75dB (120Hz)

Control Features:: -

Protection Features:: Thermal Shutdown

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-89-3

AZ1117R-3.3TRE1 FAQ

1.How can I place an order for AZ1117R-3.3TRE1 through Aetrix?

Please submit a Request for Quotation (RFQ) for AZ1117R-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 AZ1117R-3.3TRE1 reliable?

The price and inventory of AZ1117R-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 AZ1117R-3.3TRE1 is usually 5 days.

3.What payment methods are accepted for AZ1117R-3.3TRE1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ1117R-3.3TRE1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AZ1117R-3.3TRE1?

AZ1117R-3.3TRE1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AZ1117R-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 AZ1117R-3.3TRE1?

For technical support, including AZ1117R-3.3TRE1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ1117R-3.3TRE1 requirements.

6.How does Aetrix verify that AZ1117R-3.3TRE1 is sourced from the original manufacturer or authorized distributors?

All AZ1117R-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 AZ1117R-3.3TRE1 meets industry standards.

7.What is the process for return or replacement of AZ1117R-3.3TRE1?

All AZ1117R-3.3TRE1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ1117R-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 AZ1117R-3.3TRE1 part is unused and in its original packaging.

Return procedure for AZ1117R-3.3TRE1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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