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

Diodes Incorporated AZ1117CR2-ADJTRG1

Name: AZ1117CR2-ADJTRG1
Brand: Diodes Incorporated
SKU: AZ1117CR2-ADJTRG1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AZ1117CR2-ADJTRG1

Manufacturer:: Diodes Incorporated

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

Package:: TO-243AA

Datasheet:: AZ1117CR2-ADJTRG1.pdf

Description:: IC REG LINEAR POS ADJ 1A SOT89-3

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Product details

Overview

AZ1117CR2-ADJTRG1 from Diodes Incorporated is a low-dropout linear regulator (LDO) designed for adjustable output voltage applications requiring high accuracy, low noise, and robust thermal protection. It delivers up to 1.35A typical output current, maintains ±1% output voltage accuracy (via trimmed bandgap reference), and features 1.3V typical dropout at 0.8A in SOT89-3 package. Used in USB devices and PC motherboard power rails where transient response and minimum input voltage margin are critical.

For engineers reviewing the AZ1117CR2-ADJTRG1 datasheet, AZ1117CR2-ADJTRG1 pinout, AZ1117CR2-ADJTRG1 application, or AZ1117CR2-ADJTRG1 equivalent, key selection criteria include dropout voltage at rated load, PSRR at 120Hz, thermal shutdown threshold, quiescent current under no-load, and compatibility with low-ESR ceramic capacitors.

Technical Context

The AZ1117CR2-ADJTRG1 implements an internal bandgap reference with laser-trimmed precision, enabling ±1% output voltage accuracy across -20°C to +125°C. Its feedback loop uses the ADJ pin to set V_OUT = V_REF × (1 + R2/R1) + I_ADJ × R2, where V_REF = 1.250V (typ) and I_ADJ ≤ 120µA.

Thermal protection activates at +160°C junction temperature with +16°C hysteresis, and current limiting engages at ≥1A (min) to prevent damage during overload. The device operates with input voltages up to 15V and requires only a 10µF minimum ceramic output capacitor with ESR < 20Ω.

Key Specifications

Parameter	Value and Actual Design Meaning
V_REF	1.250V typical; sets output voltage via external resistor divider with ±1% accuracy over full temperature range
Dropout Voltage	1.3V typical at 0.8A (SOT89); enables regulation with minimal VIN–VOUT headroom in space-constrained designs
PSRR	70dB at 120Hz, 300mA load; suppresses ripple from upstream switching regulators or noisy DC sources
Output Noise	0.003% of V_OUT (10Hz–10kHz); supports noise-sensitive analog circuits like ADCs or RF front-ends
I_Q Max	6mA maximum; minimizes standby power loss in battery-backed or always-on systems
Thermal Shutdown	Triggers at +160°C junction temperature with +16°C hysteresis; prevents permanent damage during sustained overload or poor heatsinking
Current Limit	1.35A typical; provides short-circuit protection while allowing peak loads exceeding 1A without foldback

Pinout & Package

The AZ1117CR2-ADJTRG1 is packaged in SOT89-3 (TO-243AA), a surface-mount plastic package with exposed thermal pad on leadframe for enhanced heat dissipation. Thermal resistance θ_JA is 170°C/W (no heatsink) and 150°C/W (with heatsink).

Pin/Terminal	Circuit Role	Design Meaning
1 (INPUT)	Input voltage supply	Accepts 2.7V to 15V DC input; must be ≥ V_OUT + 1.3V for full regulation at 0.8A
2 (OUTPUT)	Regulated output node	Delivers adjustable output (≥1.25V) with low noise and high PSRR; requires ≥10µF ceramic capacitor
3 (ADJ/GND)	Feedback reference terminal	Connects to resistor divider midpoint; draws ≤120µA; sets V_OUT per V_REF × (1 + R2/R1) formula

Key Features

Feature	Design Value
Trimmed bandgap reference	Ensures ±1% output voltage accuracy across -20°C to +125°C without external calibration
Low-ESR capacitor compatibility	Stable with ceramic capacitors ≥10µF and ESR < 20Ω-eliminates need for costly tantalum or electrolytic types
Integrated thermal shutdown	Self-protects against ambient + power dissipation overload; recovers automatically after cooldown
High PSRR at line frequency	70dB rejection at 120Hz enables clean LDO output even when powered from unfiltered rectified AC or SMPS with poor low-frequency filtering
Adjustable output architecture	Supports any V_OUT ≥1.25V using two standard resistors-reduces BOM count versus fixed-voltage variants

Applications

USB Devices

Add-on Cards

Use Scenario: Powering USB 2.0/3.0 peripheral ICs (e.g., USB transceivers, hub controllers) from 5V bus with tight noise and transient requirements.

IC Role / Device Role / Timing Role: Primary local LDO delivering stable 3.3V or 1.8V rail; regulates against USB port voltage sag and digital switching noise.

Use Value: 0.003% RMS output noise and 70dB PSRR ensure signal integrity in high-speed data links without added filtering.

Use Scenario: Providing clean, adjustable core voltage to FPGA or CPLD configuration circuitry on PCIe or M.2 add-in cards.

IC Role / Device Role / Timing Role: Adjustable LDO supplying configurable logic voltage (e.g., 1.2V, 1.5V, 1.8V) from shared 3.3V or 5V board rail.

Use Value: ±1% output accuracy and 1.3V dropout enable reliable operation even with marginal input voltage margins on compact card layouts.

DVD Players

PC Motherboards

Use Scenario: Generating low-noise analog supply (e.g., 3.3V) for audio DACs and video decoders in consumer DVD/Blu-ray players.

IC Role / Device Role / Timing Role: Post-regulator for sensitive analog subsystems; rejects ripple from main SMPS and reduces EMI coupling into audio paths.

Use Value: 0.003% output noise (10Hz–10kHz) meets THD+N requirements for CD-quality audio playback without additional LC filtering.

Use Scenario: Supplying auxiliary voltages (e.g., 2.5V, 3.3V) to chipset I/O, SMBus controllers, or embedded controllers on ATX motherboards.

IC Role / Device Role / Timing Role: Secondary LDO supporting non-CPU power domains; handles dynamic load steps from firmware updates or sensor polling.

Use Value: Fast transient response and 1.35A current limit maintain regulation during burst-mode loads from management controllers without brownout.

Equivalent & Alternatives

The following parts are listed as comparable options for similar adjustable LDO applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MIC29302WU	Higher dropout (0.4V @ 3A), higher IQ (15mA max), TO263-5 package	Better suited for high-current, low-VIN applications where thermal mass is available	Select when >1.35A continuous load or lower dropout at higher currents is required
LD1117S33TR	Fixed 3.3V output only; same SOT-223 package; 1.2V dropout @ 0.8A	Limited to single-output systems; lacks adjustability but offers smaller footprint than SOT89	Select for cost-sensitive, fixed-voltage designs where resistor network elimination improves reliability

Compared with MIC29302WU and LD1117S33TR, the AZ1117CR2-ADJTRG1 offers superior noise performance (0.003% vs. ≥0.01%) and tighter output accuracy (±1% vs. ±2%), making it preferred for precision analog and mixed-signal applications despite its moderate current rating.

Availability

AZ1117CR2-ADJTRG1 is available at Aetrix Electronics and suitable for USB devices, add-on cards, and PC motherboard designs requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.

Supply support for AZ1117CR2-ADJTRG1 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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.

The AZ1117C series targets cost-effective, high-reliability LDO applications in consumer, computing, and industrial equipment-emphasizing low dropout, thermal robustness, and compatibility with modern ceramic capacitors.

FAQ

What is the minimum output capacitor value required for stable operation?

The AZ1117CR2-ADJTRG1 requires a minimum 10µF ceramic output capacitor with ESR less than 20Ω. This ensures phase margin stability across all load and temperature conditions. Using smaller values or higher-ESR capacitors may cause oscillation or poor transient response, especially under step-load conditions.

Can this device regulate from a 3.3V input to a 2.5V output?

No. With a typical dropout voltage of 1.3V at 0.8A, the AZ1117CR2-ADJTRG1 requires at least 3.8V input to sustain 2.5V output under full load. For 3.3V-to-2.5V conversion, a lower-dropout LDO such as the AP2112K (dropout ~150mV) is recommended.

How does the ADJ pin current affect output voltage accuracy?

The ADJ pin draws up to 120µA, which flows through the lower resistor (R2) in the feedback divider. This introduces a systematic error: V_OUT = V_REF × (1 + R2/R1) + I_ADJ × R2. To minimize error, keep R2 ≤ 10kΩ; for example, with R1 = 1.24kΩ and R2 = 768Ω (for 3.3V), I_ADJ × R2 contributes ~0.09mV-well within ±1% tolerance.

Is the AZ1117CR2-ADJTRG1 qualified for automotive applications?

No. While the AZ1117CR2-ADJTRG1 operates from -20°C to +125°C, it is not AEC-Q100 qualified. Diodes Incorporated offers the pin-compatible AZ1117E series (e.g., AZ1117E-ADJTRG1) for automotive use, featuring PPAP capability, IATF 16949 manufacturing, and extended reliability testing.

AZ1117CR2-ADJTRG1 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: AZ1117C

Package/Case:: TO-243AA

Packaging:: Tape & Reel (TR)

Product Status:: Active

Output Configuration:: Positive

Output Type:: Adjustable

Number of Regulators:: 1

Voltage - Input (Max):: 15V

Voltage - Output (Min/Fixed):: 1.25V

Voltage - Output (Max):: 15V

Voltage Dropout (Max):: -

Current - Output:: 1A

Current - Quiescent (Iq):: 5 mA

Current - Supply (Max):: -

PSRR:: 70dB (120Hz)

Control Features:: -

Protection Features:: Thermal Shutdown

Operating Temperature:: -20°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-89-3

AZ1117CR2-ADJTRG1 FAQ

1.How can I place an order for AZ1117CR2-ADJTRG1 through Aetrix?

Please submit a Request for Quotation (RFQ) for AZ1117CR2-ADJTRG1 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 AZ1117CR2-ADJTRG1 reliable?

The price and inventory of AZ1117CR2-ADJTRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ1117CR2-ADJTRG1 is usually 5 days.

3.What payment methods are accepted for AZ1117CR2-ADJTRG1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ1117CR2-ADJTRG1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AZ1117CR2-ADJTRG1?

AZ1117CR2-ADJTRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AZ1117CR2-ADJTRG1 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 AZ1117CR2-ADJTRG1?

For technical support, including AZ1117CR2-ADJTRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ1117CR2-ADJTRG1 requirements.

6.How does Aetrix verify that AZ1117CR2-ADJTRG1 is sourced from the original manufacturer or authorized distributors?

All AZ1117CR2-ADJTRG1 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 AZ1117CR2-ADJTRG1 meets industry standards.

7.What is the process for return or replacement of AZ1117CR2-ADJTRG1?

All AZ1117CR2-ADJTRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ1117CR2-ADJTRG1, 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 AZ1117CR2-ADJTRG1 part is unused and in its original packaging.

Return procedure for AZ1117CR2-ADJTRG1:

1.Submit a request within 90 days.

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

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