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Diodes Incorporated AZ1117BH-2.5TRE1
- Part No.:
- AZ1117BH-2.5TRE1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
AZ1117BH-2.5TRE1.pdf
- Description:
- IC REG LINEAR 2.5V 850MA SOT223
- Quantity:
- Payment:
- Shipping:
Inventory:4,166
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Product details
Overview
AZ1117BH-2.5TRE1 from BCD Semiconductor Manufacturing Limited is a fixed-output 2.5 V, 600 mA low dropout linear regulator in SOT-223 package, featuring ±1% output voltage accuracy, 1.2 V typical dropout at 800 mA, and integrated thermal shutdown. It delivers stable power to noise-sensitive analog circuitry in USB peripherals and PC motherboard auxiliary rails.
For engineers reviewing the AZ1117BH-2.5TRE1 datasheet, AZ1117BH-2.5TRE1 pinout, AZ1117BH-2.5TRE1 application, or AZ1117BH-2.5TRE1 equivalent, key selection criteria include dropout voltage at full load, PSRR at 120 Hz, quiescent current under no-load conditions, and thermal resistance in SOT-223 without heatsink.
Technical Context
The AZ1117BH-2.5TRE1 uses a trimmed bandgap reference and PNP pass transistor architecture optimized for low-voltage operation with fast transient response. Its internal current limit (1.0 A typ.) and thermal shutdown (160 °C trip, 16 °C hysteresis) operate independently of external components.
It supports fixed 2.5 V output without external resistors and requires only 10 μF input and 22 μF output ceramic capacitors for stability. The device maintains regulation down to VIN = VOUT + 1.2 V across -20 °C to 125 °C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V ±1% (ensures consistent biasing for 2.5 V logic and ADC reference rails) |
| Dropout Voltage | 1.2 V @ 800 mA (enables operation from 3.7 V input in battery-backed systems) |
| PSRR | 70 dB @ 120 Hz, 300 mA load (suppresses ripple from switching DC/DC stages feeding its input) |
| Quiescent Current | 6 mA max (limits standby power in always-on USB device subsystems) |
| Thermal Shutdown | 160 °C junction trip with 16 °C hysteresis (prevents latch-up during sustained overload) |
| RMS Output Noise | 0.003% of VOUT (2.5 V → 75 µV RMS, suitable for precision analog front-ends) |
| Current Limit | 1.0 A typical (provides robust short-circuit protection without external foldback) |
Pinout & Package
SOT-223 package with exposed thermal pad on leadframe; 3-pin configuration optimized for PCB heat dissipation without heatsink (θJA = 150 °C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (INPUT) | Regulator input supply | Accepts 3.7–15 V DC; must be decoupled with ≥10 μF capacitor near pin |
| 2 (OUTPUT) | Regulated 2.5 V output | Drives loads up to 600 mA; requires ≥22 μF output capacitance for stability |
| 3 (GND) | Ground reference and thermal path | Connected to large copper pour for thermal conduction; shares ground plane with input/output caps |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 2.5 V output | Eliminates external resistor network, reducing BOM count and layout sensitivity |
| ±1% output accuracy | Meets tight tolerance requirements for 2.5 V ADC references and FPGA I/O banks |
| 70 dB PSRR at 120 Hz | Rejects line-frequency ripple from AC/DC adapters feeding system input rail |
| 1.2 V dropout @ 800 mA | Enables single-cell Li-ion (3.0–4.2 V) or 3.3 V rail derivation without efficiency penalty |
| On-chip thermal shutdown | Self-protects during sustained overload or poor PCB thermal design without external circuitry |
Applications
| USB Device Power | Add-on Card Regulation |
|---|---|
|
Use Scenario: Powering USB audio interface ICs and microcontroller peripherals from 5 V bus. IC Role / Device Role / Timing Role: Primary 2.5 V LDO supplying codec analog core and USB PHY termination. Use Value: Low output noise (75 µV RMS) prevents audible artifacts; 70 dB PSRR suppresses 5 V switcher coupling. |
Use Scenario: Generating clean 2.5 V for PCIe add-in card FPGA I/O banks. IC Role / Device Role / Timing Role: Local point-of-load regulator for high-speed transceiver termination voltage. Use Value: ±1% accuracy ensures signal integrity margin; 1.2 V dropout allows use of shared 3.3 V system rail. |
| DVD Player Audio Stage | PC Motherboard Standby Rail |
|
Use Scenario: Supplying DAC and op-amp stages in DVD player audio subsystem. IC Role / Device Role / Timing Role: Low-noise analog supply rail isolated from digital switching noise. Use Value: 0.003% RMS noise preserves dynamic range; thermal shutdown protects during amplifier fault conditions. |
Use Scenario: Providing always-on 2.5 V to RTC, SMBus controller, and wake logic on ATX motherboards. IC Role / Device Role / Timing Role: Standby power regulator maintaining functionality during S3/S4 sleep states. Use Value: 6 mA max IQ minimizes battery drain on CMOS RTC backup; -20 °C to 125 °C rating covers chassis thermal extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP1117M-2.5 | Same 2.5 V output, but rated for 800 mA continuous; higher dropout (1.3 V @ 800 mA); different pinout (SOT-223 variant with pin 1 = GND) | Requires PCB redesign due to reversed pin 1/GND assignment; better suited for higher-current loads | Select if load exceeds 600 mA and board layout allows pinout change |
| LD1117S25TR | 2.5 V output, 800 mA rating, 1.1 V dropout @ 800 mA; SO-8 package (not SOT-223); higher PSRR (75 dB @ 120 Hz) | Requires footprint change and thermal via rework; superior noise performance but larger area | Choose when lower dropout or higher PSRR is critical and SO-8 mounting is acceptable |
Compared with AP1117M-2.5 and LD1117S25TR, the AZ1117BH-2.5TRE1 offers optimal balance of SOT-223 thermal performance, 600 mA capability, and drop-in compatibility with legacy 2.5 V LDO footprints-without requiring pinout revision or package conversion.
Availability
AZ1117BH-2.5TRE1 is available at Aetrix Electronics and suitable for USB device power, PC motherboard standby rails, DVD player audio stages, and add-on card regulation requiring stable component supply across industrial temperature ranges.
Supply support for AZ1117BH-2.5TRE1 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 Shanghai-based analog and power IC designer specializing in high-reliability linear regulators, MOSFETs, and mixed-signal products for industrial and computing applications.
The AZ1117B series targets cost-sensitive, thermally constrained applications requiring precision low-dropout regulation-especially in PC, consumer, and peripheral equipment where SOT-223 thermal performance and ±1% accuracy are decisive.
FAQ
What is the minimum input voltage required for AZ1117BH-2.5TRE1 to maintain regulation?
The minimum input voltage is 3.7 V, calculated as VOUT + VDROP(min) = 2.5 V + 1.2 V. Below this, output voltage drops linearly with input. At 800 mA load and 25 °C, dropout is typically 1.2 V; it rises to 1.3 V at 125 °C junction temperature per datasheet Figure 15.
Can AZ1117BH-2.5TRE1 replace adjustable AZ1117B-ADJ in existing designs?
No direct replacement: the -2.5TRE1 is fixed-output and lacks the ADJ pin. To substitute, remove external R1/R2 divider and connect ADJ pin directly to OUTPUT (per Figure 17), but output will be 2.5 V-not adjustable. Layout changes are required to accommodate the different pin function.
Does AZ1117BH-2.5TRE1 require an input bypass capacitor?
Yes-a minimum 10 μF tantalum or ceramic capacitor must be placed within 5 mm of the INPUT pin. This stabilizes the control loop and prevents oscillation during line transients. Without it, the regulator may exhibit ringing or instability, especially with long input traces.
Is AZ1117BH-2.5TRE1 RoHS compliant and lead-free?
Yes-the "E1" suffix in the part number (AZ1117BH-2.5TRE1) explicitly denotes BCD Semiconductor's RoHS-compliant, lead-free construction per EU Directive 2011/65/EU, verified in the official datasheet Section 1 (Ordering Information) and manufacturer's compliance documentation.
AZ1117BH-2.5TRE1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- AZ1117B
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 850mA
- 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
AZ1117BH-2.5TRE1 FAQ
1.How can I place an order for AZ1117BH-2.5TRE1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ1117BH-2.5TRE1 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 AZ1117BH-2.5TRE1 reliable?
The price and inventory of AZ1117BH-2.5TRE1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ1117BH-2.5TRE1 is usually 5 days.
3.What payment methods are accepted for AZ1117BH-2.5TRE1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ1117BH-2.5TRE1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ1117BH-2.5TRE1?
AZ1117BH-2.5TRE1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ1117BH-2.5TRE1 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 AZ1117BH-2.5TRE1?
For technical support, including AZ1117BH-2.5TRE1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ1117BH-2.5TRE1 requirements.
6.How does Aetrix verify that AZ1117BH-2.5TRE1 is sourced from the original manufacturer or authorized distributors?
All AZ1117BH-2.5TRE1 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 AZ1117BH-2.5TRE1 meets industry standards.
7.What is the process for return or replacement of AZ1117BH-2.5TRE1?
All AZ1117BH-2.5TRE1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ1117BH-2.5TRE1, 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 AZ1117BH-2.5TRE1 part is unused and in its original packaging.
Return procedure for AZ1117BH-2.5TRE1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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