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Diodes Incorporated AZ1117CH-2.5TRG1
- Part No.:
- AZ1117CH-2.5TRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
AZ1117CH-2.5TRG1.pdf
- Description:
- IC REG LINEAR 2.5V 1A SOT223
- Quantity:
- Payment:
- Shipping:
Inventory:7,253
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Product details
Overview
AZ1117CH-2.5TRG1 from Diodes Incorporated is a fixed-output 2.5V low-dropout linear regulator in SOT223 package, delivering up to 1.35A output current with ±1% output voltage accuracy, 1.3V typical dropout at 0.8A, and 70dB PSRR at 120Hz. It integrates thermal shutdown and current limiting, and is optimized for USB devices and PC motherboard power rails where transient response and low input voltage margin are critical.
For engineers reviewing the AZ1117CH-2.5TRG1 datasheet, AZ1117CH-2.5TRG1 pinout, AZ1117CH-2.5TRG1 application, or AZ1117CH-2.5TRG1 equivalent, key selection criteria include dropout voltage at 800mA load, RMS output noise (0.003% of VOUT), quiescent current (max 6mA), thermal shutdown threshold (+160°C), and compatibility with low-ESR ceramic capacitors (≤20Ω, ≥10µF).
Technical Context
The AZ1117CH-2.5TRG1 uses a trimmed bandgap reference for stable 2.5V output regulation across -20°C to +125°C junction temperature. Its internal circuitry includes foldback current limiting and thermal shutdown with +16°C hysteresis to prevent oscillation during overtemperature events.
It operates with a minimum input-to-output differential of 1.3V at 0.8A (SOT223), supports input voltages up to 15V, and maintains load regulation within ±15mV across 10mA–800mA output current range. The device requires no external compensation and is stable with ceramic output capacitors as low as 10µF and ESR ≤20Ω.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5V ±1% (2.475V–2.525V) ensures precise rail generation for 2.5V logic and analog subsystems. |
| Dropout Voltage | 1.3V typ @ 0.8A (SOT223) enables operation from 3.8V input, critical for battery-backed or low-headroom supplies. |
| Output Current | 1.35A typ current limit protects against short-circuit faults while sustaining full-load operation. |
| PSRR | 70dB @ 120Hz, 300mA load suppresses ripple from noisy DC-DC pre-regulators feeding the LDO. |
| RMS Output Noise | 0.003% of VOUT (≈75µV RMS) minimizes jitter in clock-sensitive circuits like USB PHYs. |
| Quiescent Current | Max 6mA at zero load reduces standby power loss in always-on system rails. |
| Thermal Shutdown | Triggers at +160°C junction temperature with +16°C hysteresis to prevent thermal cycling damage. |
| Operating Temp | -20°C to +125°C junction range supports industrial and extended-temperature embedded applications. |
Pinout & Package
The AZ1117CH-2.5TRG1 is packaged in SOT223 (H package), a surface-mount, thermally enhanced 3-pin outline with exposed thermal pad for improved heat dissipation. Pin 1 = INPUT, Pin 2 = OUTPUT, Pin 3 = GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (INPUT) | Regulator Input Supply | Accepts 3.8V–15V unregulated input; requires local 10µF ceramic decoupling capacitor. |
| Pin 2 (OUTPUT) | Stabilized 2.5V Output | Delivers regulated 2.5V to load; requires ≥10µF low-ESR ceramic capacitor with ESR ≤20Ω. |
| Pin 3 (GND) | Ground Reference & Thermal Path | Serves as return path and primary thermal conduction route to PCB copper; must be connected to large ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 2.5V Output | Eliminates external resistor network, reducing BOM count and layout area for dedicated 2.5V rails. |
| Low Dropout (1.3V @ 0.8A) | Enables efficient conversion from 3.3V or 5V sources without requiring higher input voltage margins. |
| 70dB PSRR at 120Hz | Effectively filters switching noise from upstream DC-DC converters in mixed-signal systems. |
| ±1% Output Accuracy | Guarantees compliance with tight tolerance requirements of DDR memory termination and FPGA I/O banks. |
| Thermal Shutdown + Hysteresis | Prevents catastrophic failure under sustained overload or poor heatsinking; +16°C hysteresis avoids chatter. |
| Ceramic Capacitor Compatible | Supports compact, high-reliability 10µF X5R/X7R MLCCs instead of larger, aging-prone tantalum or electrolytic types. |
Applications
| USB Devices | Add-on Cards |
|---|---|
Use Scenario: Powering USB 2.0 transceivers and hub controllers on portable peripherals. IC Role / Device Role / Timing Role: Provides clean, low-noise 2.5V supply for USB PHY analog front-end and reference voltage generation. Use Value: 0.003% RMS output noise prevents bit errors; 70dB PSRR rejects noise from shared 5V bus switching regulators. | Use Scenario: Regulating 2.5V for PCIe add-in card I/O buffers and configuration EEPROMs. IC Role / Device Role / Timing Role: Supplies stable 2.5V to PCI Express slot interface logic and sideband signaling circuits. Use Value: ±1% output accuracy ensures reliable communication with host chipset; 1.35A current limit handles hot-plug surge currents. |
| DVD Players | PC Motherboards |
Use Scenario: Generating 2.5V for digital audio DACs and video decoder ICs in consumer DVD playback units. IC Role / Device Role / Timing Role: Delivers low-noise bias for high-fidelity audio signal paths and precision video timing circuits. Use Value: 75µV RMS noise floor preserves dynamic range; thermal shutdown protects against enclosure overheating during extended play. | Use Scenario: Providing auxiliary 2.5V rail for chipset I/O, SMBus controllers, and BIOS flash memory on ATX motherboards. IC Role / Device Role / Timing Role: Acts as secondary LDO for non-CPU power domains requiring tighter regulation than main VRMs. Use Value: 1.3V dropout allows direct sourcing from 3.3V rail; SOT223 thermal performance sustains continuous 1A loads without heatsink. |
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 |
|---|---|---|---|
| MIC29302WU-2.5 | Higher dropout (1.5V @ 3A), lower PSRR (60dB), wider input range (25V max). | Better suited for high-input-voltage industrial sensors; less optimal for low-headroom USB designs. | Select when input exceeds 15V or >2A current is required; avoid if noise or dropout is critical. |
| TLV1117-25CDCYR | Lower current limit (800mA), same dropout (1.2V), identical 2.5V accuracy and noise spec. | Compatible for space-constrained SOT-223 footprints but insufficient for 1A+ loads. | Choose only for cost-sensitive, sub-800mA applications; verify thermal margin with θJA=125°C/W. |
Compared with MIC29302WU-2.5 and TLV1117-25CDCYR, the AZ1117CH-2.5TRG1 delivers superior PSRR and lower dropout in the 0.8–1.35A range, making it optimal for noise-sensitive, low-input-voltage applications like USB and motherboard I/O rails-where the TLV1117 lacks current headroom and the MIC29302 sacrifices ripple rejection.
Availability
AZ1117CH-2.5TRG1 is available at Aetrix Electronics and suitable for USB devices, PC motherboard power rails, and DVD player audio/video subsystems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AZ1117CH-2.5TRG1 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
The AZ1117C series is designed for low-voltage, high-transient-response linear regulation in space-constrained and thermally demanding applications-emphasizing dropout efficiency, output accuracy, and ceramic capacitor compatibility.
FAQ
What is the minimum input voltage required for stable 2.5V output at 1A load?
The AZ1117CH-2.5TRG1 requires a minimum input voltage of 3.8V to maintain regulation at 1A load, based on its typical 1.3V dropout voltage at 0.8A and confirmed 1.4V maximum dropout at 1A per datasheet Figure 9. Derating applies above +85°C ambient; thermal design must ensure junction temperature remains ≤+125°C.
Can this regulator be used with a 4.7µF output capacitor?
No. The AZ1117CH-2.5TRG1 requires a minimum 10µF ceramic output capacitor with ESR ≤20Ω for stability, as specified in Section 4.2 of DS36676 Rev. 5-2. Using 4.7µF risks oscillation and degraded transient response; 10µF X5R or X7R MLCCs are validated and recommended.
Does the AZ1117CH-2.5TRG1 require an input bypass capacitor?
Yes. A minimum 10µF ceramic input capacitor placed within 5mm of the INPUT and GND pins is required to suppress high-frequency noise and prevent instability during load transients. This is explicitly mandated in the "Typical Applications Circuit" section (page 3) and reinforced by layout guidelines in the datasheet.
Is the SOT223 package lead-free and RoHS compliant?
Yes. The AZ1117CH-2.5TRG1 is fully RoHS 3 compliant (2015/863/EU), totally lead-free, and halogen/antimony-free per Diodes Incorporated's "Green" definition (<900ppm Br, <900ppm Cl, <1000ppm Sb). Compliance is documented in the datasheet notes and verified via Diodes' quality portal.
AZ1117CH-2.5TRG1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- AZ1117C
- 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):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.3V @ 800mA
- 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-223-3
AZ1117CH-2.5TRG1 FAQ
1.How can I place an order for AZ1117CH-2.5TRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ1117CH-2.5TRG1 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 AZ1117CH-2.5TRG1 reliable?
The price and inventory of AZ1117CH-2.5TRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ1117CH-2.5TRG1 is usually 5 days.
3.What payment methods are accepted for AZ1117CH-2.5TRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ1117CH-2.5TRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ1117CH-2.5TRG1?
AZ1117CH-2.5TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ1117CH-2.5TRG1 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 AZ1117CH-2.5TRG1?
For technical support, including AZ1117CH-2.5TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ1117CH-2.5TRG1 requirements.
6.How does Aetrix verify that AZ1117CH-2.5TRG1 is sourced from the original manufacturer or authorized distributors?
All AZ1117CH-2.5TRG1 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 AZ1117CH-2.5TRG1 meets industry standards.
7.What is the process for return or replacement of AZ1117CH-2.5TRG1?
All AZ1117CH-2.5TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ1117CH-2.5TRG1, 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 AZ1117CH-2.5TRG1 part is unused and in its original packaging.
Return procedure for AZ1117CH-2.5TRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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