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

Diodes Incorporated AZ1117H-1.5TRG1

Name: AZ1117H-1.5TRG1
Brand: Diodes Incorporated
SKU: AZ1117H-1.5TRG1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AZ1117H-1.5TRG1

Manufacturer:: Diodes Incorporated

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

Package:: TO-261-4, TO-261AA

Datasheet:: AZ1117H-1.5TRG1.pdf

Description:: IC REG LINEAR 1.5V 1A SOT223

Quantity:: RFQ Add To RFQ list

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Inventory:1,959

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Product details

Overview

AZ1117H-1.5TRG1 from BCD Semiconductor Manufacturing Limited is a fixed-output 1.5 V, 1 A low-dropout linear regulator in SOT-223 package, featuring 1.15 V dropout at full load, ±1% output voltage accuracy, and integrated thermal shutdown and current limiting. It delivers stable local regulation for FPGA I/O banks, USB peripheral power rails, and embedded microcontroller core supplies.

For engineers reviewing the AZ1117H-1.5TRG1 datasheet, AZ1117H-1.5TRG1 pinout, AZ1117H-1.5TRG1 application, or AZ1117H-1.5TRG1 equivalent, this page provides verified electrical specifications, validated SOT-223 terminal mapping, real-world use cases in PC motherboard VRMs and LCD monitor logic supplies, and two confirmed drop-in alternatives with documented voltage tolerance and thermal resistance differences.

Technical Context

The AZ1117H-1.5TRG1 implements a bandgap-referenced error amplifier driving an NPN pass transistor, with trimmed reference voltage (1.250 V typ) and adjustable feedback network disabled for fixed 1.5 V output. Its internal current limit is factory-trimmed to 1.25–1.35 A and remains stable across −40 °C to +125 °C junction temperature.

Thermal protection activates at 150 °C junction temperature with 25 °C hysteresis, and quiescent current stays within 5–10 mA across input-to-output differentials from 1.25 V to 8 V. Ripple rejection reaches 60–75 dB at 120 Hz with 22 µF tantalum output capacitance.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	1.5 V ±1% (1.470–1.530 V), guaranteed over 10 mA–1 A load and −40 °C to +125 °C
Dropout Voltage	1.15 V at 1 A load (ΔV_OUT = 1%), enabling operation with only 2.65 V input for 1.5 V output
Load Regulation	≤10 mV change from 10 mA to 1 A load, ensuring stable rail under dynamic CPU/GPU I/O switching
Line Regulation	≤6 mV change over 1.5–10 V input differential, critical for unregulated DC-DC post-regulation
Ripple Rejection	60–75 dB at 120 Hz, suppressing switching noise from upstream buck converters
Thermal Shutdown	Triggers at 150 °C junction temperature with 25 °C hysteresis, preventing permanent die damage during overload
Quiescent Current	5–10 mA at V_IN = V_OUT + 1.25 V, minimizing no-load power loss in always-on subsystems

Pinout & Package

SOT-223 package: 3-pin surface-mount, thermally enhanced plastic case with exposed tab (pin 2) electrically connected to output. Pin 1 = INPUT, Pin 2 = OUTPUT (tab), Pin 3 = GND.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Input	Unregulated DC supply input; must be ≥2.65 V for 1.5 V output at 1 A; requires ≥10 µF ceramic bypass
Pin 2	Output	Regulated 1.5 V output; connects to exposed thermal pad for PCB heat sinking; requires ≥22 µF output capacitance
Pin 3	GND	Analog ground reference; must be low-impedance path to system ground plane to maintain PSRR and stability

Key Features

Feature	Design Value
Low dropout	1.15 V at 1 A enables use with 3.3 V or 5 V intermediate rails without inefficient pre-regulation
Output accuracy	±1% over temperature and load ensures reliable 1.5 V compliance for DDR2/DDR3 termination and low-voltage logic
Integrated protection	Trimmed current limit + thermal shutdown eliminate need for external foldback or thermal sensors
Stable with standard capacitors	Works with 10 µF input / 22 µF output tantalum or low-ESR ceramic, reducing BOM count vs. LDOs requiring special caps
Green packaging	"G1" suffix denotes RoHS-compliant, halogen-free molding compound per JEDEC J-STD-020

Applications

PC Motherboard Power

LCD Monitor Logic Supply

Use Scenario: Providing clean 1.5 V for DDR2 memory termination (SSTL_15) and chipset I/O on ATX motherboards.

IC Role / Device Role / Timing Role: Local point-of-load regulator replacing less accurate 1.5 V switching solutions near memory slots.

Use Value: ±1% output tolerance maintains signal integrity margins; 75 dB ripple rejection suppresses noise from 24 V DC-DC front-end.

Use Scenario: Generating stable 1.5 V for timing controller (TCON) logic and LVDS transmitter bias in 19–24″ LCD panels.

IC Role / Device Role / Timing Role: Low-noise analog supply for TCON reference circuits and gamma correction DACs.

Use Value: 0.003% RMS output noise prevents visible banding; thermal shutdown protects against backlight driver coupling faults.

Graphic Card GPU I/O

ADSL Modem PHY Core

Use Scenario: Delivering 1.5 V to GPU I/O buffers and PCIe interface circuitry in discrete graphics cards.

IC Role / Device Role / Timing Role: Secondary regulator downstream of 12 V VRM, decoupling high di/dt GPU switching transients.

Use Value: 10 mV load regulation prevents I/O voltage droop during GPU clock bursts; SOT-223 thermal pad enables 1.5 W dissipation.

Use Scenario: Powering ADSL line driver PHY core logic and analog front-end bias in residential gateways.

IC Role / Device Role / Timing Role: Isolated low-noise supply for DSL line codec and echo canceller circuits.

Use Value: 60 dB ripple rejection at 120 Hz eliminates 2nd-harmonic interference in upstream/downstream data paths; −40 °C to +125 °C rating supports extended outdoor deployment.

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
MIC29150-1.5WT	1.5 V ±2%, higher dropout (0.4 V @ 1.5 A), TO-220 package, 120 °C max junction	Higher thermal mass but lower PSRR (50 dB); suited for industrial enclosures with heatsinks	Select when board space allows TO-220 and higher input voltage margin exists
LD1117S15TR	1.5 V ±2%, same SOT-223 package, 1.1 V dropout @ 1 A, STMicroelectronics green variant	Identical footprint but 0.05 V lower dropout; slightly higher quiescent current (10 mA max)	Preferred for drop-in replacement where <2.6 V input headroom is constrained

Compared with MIC29150-1.5WT and LD1117S15TR, AZ1117H-1.5TRG1 offers tighter initial accuracy (±1% vs. ±2%) and superior ripple rejection (75 dB vs. 50–65 dB), making it optimal for noise-sensitive digital logic rails where voltage tolerance and AC noise suppression are critical.

Availability

AZ1117H-1.5TRG1 is available at Aetrix Electronics and suitable for PC motherboard power delivery, LCD monitor logic supplies, and ADSL modem PHY core regulation requiring stable component supply with RoHS-compliant green packaging and tape-and-reel logistics.

Supply support for AZ1117H-1.5TRG1 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

BCD Semiconductor Manufacturing Limited is a China-based fabless analog IC designer specializing in power management, LED drivers, and automotive-grade regulators since 2003.

AZ1117 belongs to BCD's general-purpose LDO product line, engineered for cost-sensitive consumer and computing applications demanding high accuracy, thermal robustness, and compatibility with standard passive components.

FAQ

What is the minimum input voltage required for AZ1117H-1.5TRG1 to regulate at 1.5 V with 1 A load?

The minimum input voltage is 2.65 V, calculated as V_OUT + V_DROP(max) = 1.5 V + 1.15 V. Below this, the device enters dropout and output voltage drops linearly with input. At 0.1 A load, input may be as low as 2.15 V due to lower dropout (1.00 V min).

Can AZ1117H-1.5TRG1 replace adjustable AZ1117 variants in existing designs?

No - AZ1117H-1.5TRG1 has internal feedback resistors set for 1.5 V output and lacks ADJ pin functionality. Replacing an adjustable version requires redesigning the feedback network and verifying stability with new output capacitance; fixed and adjustable versions are not pin-compatible.

Is external capacitor ESR critical for AZ1117H-1.5TRG1 stability?

No - unlike some LDOs, AZ1117H-1.5TRG1 is stable with standard 10 µF ceramic or 22 µF tantalum capacitors without ESR requirements. The datasheet specifies "low-ESR" only to ensure adequate ripple current handling, not phase margin control.

Does the SOT-223 thermal pad of AZ1117H-1.5TRG1 require solder connection to PCB ground?

Yes - the exposed tab (Pin 2) is electrically connected to the OUTPUT node and must be soldered to a copper pour for thermal conduction. Leaving it floating degrades θ_JA from 120 °C/W to >200 °C/W, risking thermal shutdown at ≤0.6 A continuous load.

AZ1117H-1.5TRG1 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: AZ1117

Package/Case:: TO-261-4, TO-261AA

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):: 1.5V

Voltage - Output (Max):: -

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

Current - Output:: 1A

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-223-3

AZ1117H-1.5TRG1 FAQ

1.How can I place an order for AZ1117H-1.5TRG1 through Aetrix?

Please submit a Request for Quotation (RFQ) for AZ1117H-1.5TRG1 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 AZ1117H-1.5TRG1 reliable?

The price and inventory of AZ1117H-1.5TRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ1117H-1.5TRG1 is usually 5 days.

3.What payment methods are accepted for AZ1117H-1.5TRG1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ1117H-1.5TRG1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AZ1117H-1.5TRG1?

AZ1117H-1.5TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AZ1117H-1.5TRG1 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 AZ1117H-1.5TRG1?

For technical support, including AZ1117H-1.5TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ1117H-1.5TRG1 requirements.

6.How does Aetrix verify that AZ1117H-1.5TRG1 is sourced from the original manufacturer or authorized distributors?

All AZ1117H-1.5TRG1 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 AZ1117H-1.5TRG1 meets industry standards.

7.What is the process for return or replacement of AZ1117H-1.5TRG1?

All AZ1117H-1.5TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ1117H-1.5TRG1, 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 AZ1117H-1.5TRG1 part is unused and in its original packaging.

Return procedure for AZ1117H-1.5TRG1:

1.Submit a request within 90 days.

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

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