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

Diodes Incorporated AZ1117CR-1.2TRG1

Name: AZ1117CR-1.2TRG1
Brand: Diodes Incorporated
SKU: AZ1117CR-1.2TRG1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AZ1117CR-1.2TRG1

Manufacturer:: Diodes Incorporated

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

Package:: TO-243AA

Datasheet:: AZ1117CR-1.2TRG1.pdf

Description:: IC REG LINEAR 1.2V 1A SOT89

Quantity:: RFQ Add To RFQ list

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Inventory:930

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Product details

Overview

AZ1117CR-1.2TRG1 from Diodes Incorporated is a fixed-output 1.2 V low-dropout linear regulator in SOT89 package, delivering up to 1.35 A with ±1.2% output voltage accuracy at 10 mA, 70 dB PSRR at 120 Hz, and thermal shutdown protection. It serves as a primary post-regulation supply for USB peripherals and add-on cards requiring stable low-voltage bias under transient load conditions.

For engineers reviewing the AZ1117CR-1.2TRG1 datasheet, AZ1117CR-1.2TRG1 pinout, AZ1117CR-1.2TRG1 application, or AZ1117CR-1.2TRG1 equivalent, key selection criteria include dropout voltage (1.3 V typ. at 0.8 A), quiescent current (≤6 mA), compatibility with low-ESR ceramic capacitors (≥10 µF), and operation across –20°C to +125°C junction temperature.

Technical Context

The AZ1117CR-1.2TRG1 integrates a trimmed bandgap reference and on-chip thermal shutdown circuitry, enabling precise 1.2 V regulation without external feedback components. Its architecture supports fast transient response and stable operation with ceramic output capacitors having ESR <20 Ω.

It operates with input voltages up to 15 V and maintains regulation down to a 1.3 V dropout (TO252-2 Series) or 1.2 V (SOT223); for this SOT89 variant, typical dropout is 1.3 V at 0.8 A. The device features internal current limiting (1.35 A typ.) and thermal hysteresis of +16°C.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.2 V ±1.2% (1.152–1.228 V) at 10 mA, –20°C to +125°C
Dropout Voltage	1.3 V typical at 0.8 A load, defining minimum VIN = 2.5 V for stable 1.2 V output
PSRR	70 dB at 120 Hz, 300 mA load, critical for rejecting ripple from upstream switching supplies
Quiescent Current	Max 6 mA at zero load, minimizing standby power loss in always-on subsystems
Thermal Shutdown	Activates at +160°C junction temperature with +16°C hysteresis for reliable overtemperature recovery
RMS Output Noise	0.003% of VOUT (36 µV RMS for 1.2 V) over 10 Hz–10 kHz, suitable for noise-sensitive analog rails
Current Limit	1.35 A typical, protecting against short-circuit faults while supporting peak digital loads

Pinout & Package

Package: SOT89 (3-pin, single-ended, surface-mount). Thermal pad not electrically connected; pin 2 (output) serves as primary heat path.

Pin/Terminal	Circuit Role	Design Meaning
1 (INPUT)	Regulator input	Accepts unregulated DC input (up to 15 V); requires local 10 µF ceramic capacitor
2 (OUTPUT)	Regulated output	Delivers stable 1.2 V; connects to load and output capacitor; also primary thermal conduction path
3 (GND)	Ground reference	Return path for internal bandgap and error amplifier; must be low-impedance to minimize noise coupling

Key Features

Feature	Design Value
Low dropout operation	1.3 V typical at 0.8 A enables use with 2.5 V input sources (e.g., LiFePO₄ or buck-boost outputs)
High PSRR	70 dB at 120 Hz suppresses line-frequency ripple from AC/DC adapters or SMPS pre-regulators
Ceramic capacitor compatible	Stable with ≥10 µF, ESR <20 Ω ceramics-reducing BOM count vs. tantalum or electrolytic alternatives
±1.2% output accuracy	Tight tolerance ensures compliance with 1.2 V core logic requirements (e.g., FPGA I/O banks, low-voltage microcontrollers)
Integrated thermal protection	Auto-recovery shutdown prevents permanent damage during sustained overload or poor PCB heatsinking

Applications

USB Devices

Add-on Cards

Use Scenario: Powering USB 2.0 hub controller ICs and peripheral interface logic from a 5 V bus-derived rail.

IC Role / Device Role / Timing Role: Primary 1.2 V LDO supplying core logic voltage for USB transceivers and PHY layers.

Use Value: Low noise (36 µV RMS) prevents bit errors; 1.3 V dropout allows efficient 3.3 V → 1.2 V conversion from auxiliary regulators.

Use Scenario: Providing clean 1.2 V bias to PCIe slot expansion card FPGAs or ASICs in embedded computing systems.

IC Role / Device Role / Timing Role: Post-regulator for core voltage domain, decoupling high-speed digital switching noise from upstream converters.

Use Value: 70 dB PSRR rejects switching noise from adjacent DC/DC modules; ±1.2% accuracy meets FPGA core voltage spec.

DVD Players

PC Motherboards

Use Scenario: Supplying 1.2 V to DVD drive servo motor controllers and laser diode driver ICs.

IC Role / Device Role / Timing Role: Local low-noise regulator for analog front-end and precision timing circuits.

Use Value: 0.003% RMS noise minimizes jitter in spindle motor commutation signals; thermal shutdown protects during mechanical stall events.

Use Scenario: Delivering 1.2 V to southbridge I/O voltage rails or legacy Super I/O chips on ATX motherboards.

IC Role / Device Role / Timing Role: Secondary LDO for non-CPU voltage domains requiring tighter regulation than main VRMs provide.

Use Value: 1.35 A current limit supports burst-mode I/O activity; SOT89 footprint simplifies layout near dense BGA components.

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
MCP1700T-1202E/TT	Lower IQ (2 µA), but only 250 mA output; no thermal shutdown	Suitable for ultra-low-power sensor nodes, not high-current USB or motherboard use	Select when standby current dominates design priority and load ≤250 mA
TLV1117-12CDCYR	Same 1.2 V output, 800 mA rating, TO-220/TO-263 packages; higher dropout (1.2 V min)	Better thermal performance in high-power industrial enclosures, but larger footprint	Select when board space permits larger package and thermal management via heatsink is preferred

Compared with MCP1700T-1202E/TT, AZ1117CR-1.2TRG1 delivers 5.4× more current and includes thermal protection; versus TLV1117-12CDCYR, it offers higher current in smaller SOT89 form factor but trades off some thermal margin without heatsink.

Availability

AZ1117CR-1.2TRG1 is available at Aetrix Electronics and suitable for USB devices, add-on cards, DVD players, and PC motherboards requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for AZ1117CR-1.2TRG1 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 solutions, with emphasis on power management, signal integrity, and protection devices.

The AZ1117C series was designed for cost-sensitive, high-volume applications demanding robust low-dropout regulation-including consumer electronics, computing peripherals, and industrial control interfaces-while maintaining AEC-Q200 readiness for automotive-adjacent designs.

FAQ

What is the minimum input voltage required for stable 1.2 V output at 800 mA?

The AZ1117CR-1.2TRG1 requires a minimum input voltage of 2.5 V under those conditions, based on its typical 1.3 V dropout voltage at 0.8 A. Input below this threshold causes output collapse or regulation loss. Derating is recommended for worst-case temperature and process variation.

Can this regulator operate with a 4.7 µF ceramic output capacitor?

No. The datasheet specifies a minimum 10 µF ceramic output capacitor with ESR <20 Ω for stability. Using 4.7 µF risks oscillation or poor transient response due to insufficient phase margin, especially under dynamic load steps common in USB or FPGA applications.

Does the AZ1117CR-1.2TRG1 require an input bypass capacitor?

Yes. A minimum 10 µF ceramic capacitor is required at the INPUT pin to suppress high-frequency noise and prevent instability caused by source impedance. This capacitor must be placed within 5 mm of the input pin and share the same ground plane as the GND pin.

Is the SOT89 package thermally adequate for continuous 1.35 A operation?

No. At 1.35 A, power dissipation exceeds safe limits in SOT89 without heatsinking: with θJA = 170°C/W and 1.3 V dropout, junction temperature rise would exceed 300°C. For >500 mA continuous loads, use TO252-2 or SOT223 packages, or implement copper pour and thermal vias per Diodes' layout guidelines.

AZ1117CR-1.2TRG1 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:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 15V

Voltage - Output (Min/Fixed):: 1.2V

Voltage - Output (Max):: -

Voltage Dropout (Max):: -

Current - Output:: 1A

Current - Quiescent (Iq):: 6 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

AZ1117CR-1.2TRG1 FAQ

1.How can I place an order for AZ1117CR-1.2TRG1 through Aetrix?

Please submit a Request for Quotation (RFQ) for AZ1117CR-1.2TRG1 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 AZ1117CR-1.2TRG1 reliable?

The price and inventory of AZ1117CR-1.2TRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ1117CR-1.2TRG1 is usually 5 days.

3.What payment methods are accepted for AZ1117CR-1.2TRG1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ1117CR-1.2TRG1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AZ1117CR-1.2TRG1?

AZ1117CR-1.2TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AZ1117CR-1.2TRG1 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 AZ1117CR-1.2TRG1?

For technical support, including AZ1117CR-1.2TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ1117CR-1.2TRG1 requirements.

6.How does Aetrix verify that AZ1117CR-1.2TRG1 is sourced from the original manufacturer or authorized distributors?

All AZ1117CR-1.2TRG1 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 AZ1117CR-1.2TRG1 meets industry standards.

7.What is the process for return or replacement of AZ1117CR-1.2TRG1?

All AZ1117CR-1.2TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ1117CR-1.2TRG1, 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 AZ1117CR-1.2TRG1 part is unused and in its original packaging.

Return procedure for AZ1117CR-1.2TRG1:

1.Submit a request within 90 days.

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

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