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Diodes Incorporated AP1115BY25L-13
- Part No.:
- AP1115BY25L-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-243AA
- Datasheet:
-
AP1115BY25L-13.pdf
- Description:
- IC REG LINEAR 2.5V 600MA SOT89-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
AP1115BY25L-13 from Diodes Incorporated is a 0.6A low-dropout positive voltage regulator in fixed 2.5V output mode, housed in SOT89-3L package with pin configuration Pin1=Adj(GND), Pin2=VIN, Pin3=VOUT. It delivers <1.3V dropout at full load, supports 1.25–5V adjustable or factory-fixed outputs (including 2.5V), and is qualified for VGA card power and low-current 3.3V logic supply applications.
For engineers reviewing the AP1115BY25L-13 datasheet, AP1115BY25L-13 pinout, AP1115BY25L-13 application, or AP1115BY25L-13 equivalent, this page provides verified technical context, real-world design meaning of specifications, validated pin functions, confirmed use cases in PC peripherals and communication interfaces, and supply-chain support details for legacy component procurement.
Technical Context
The AP1115BY25L-13 operates as a fixed-output LDO regulator with internal reference voltage of 1.250V (±2.5%), enabling precise 2.5V output via resistor-free configuration. Its control architecture integrates thermal shutdown and current limiting, with guaranteed operation from 4V to 12V input while maintaining regulation down to 1.3V VIN–VOUT differential at 600mA.
Designed for stability with 10µF output capacitance (ESR 0.15–20Ω), it achieves 70dB ripple rejection at 120Hz and exhibits fast transient response-under 200µs recovery for 100mA load steps-making it suitable for bus termination where dynamic load behavior demands tight output regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±2% at 10mA, stable across 0–600mA load and 0–125°C junction temperature. |
| Dropout Voltage | 1.1V typical / 1.3V max at 600mA, enabling 2.5V output from as low as 3.8V input. |
| Line Regulation | 0.2% max over 4.5–12V input range, minimizing output drift during input rail variation. |
| Load Regulation | 20–25mV max from 0–600mA load, ensuring consistent voltage under dynamic current demand. |
| Ripple Rejection | 70dB typical at 120Hz with 25µF tantalum output cap, suppressing AC noise from upstream switching supplies. |
| Thermal Resistance | θJA = 164°C/W (no heatsink), requiring derating above 75°C ambient for sustained 600mA operation. |
| Quiescent Current | 5–10mA minimum load required to maintain regulation, critical for standby-mode compatibility. |
Pinout & Package
SOT89-3L package with exposed tab electrically connected to VIN (Pin2) per AP1115B variant; RoHS-compliant, halogen-free "Green" molding compound; 4.5×2.5mm footprint, 1.6mm height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin1: Adj (GND) | Reference node / ground return | Internally tied to ground in fixed-mode; serves as feedback reference point-must be shorted to GND for 2.5V operation. |
| Pin2: VIN | Input power supply | Accepts 4–12V DC input; requires ≥100µF bulk capacitor with ESR ≤20Ω to prevent sag during transients. |
| Pin3: VOUT | Regulated output | Delivers stable 2.5V; mandates ≥10µF output capacitor (0.15–20Ω ESR) for loop stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 2.5V output | No external resistors needed-simplifies BOM and layout for dedicated 2.5V rail generation. |
| Fast transient response | Sub-200µs recovery from 100mA load steps ensures signal integrity in high-speed interface power domains. |
| Built-in thermal shutdown | Activates at +150°C junction temperature, protecting against overheating during overload or poor PCB thermal design. |
| Current limiting | Clamps output at ~0.7A, preventing damage during short-circuit events without external protection circuitry. |
| Low-noise regulation | 60–70dB ripple rejection enables clean power delivery to noise-sensitive analog or mixed-signal ICs. |
Applications
| VGA Card Power Supply | High-Speed Bus Termination |
|---|---|
|
Use Scenario: Providing stable 2.5V bias to analog front-end circuits and DACs in discrete VGA graphics cards. IC Role / Device Role / Timing Role: Primary low-noise voltage source for video signal conditioning stages requiring minimal ripple-induced color distortion. Use Value: 2.5V output tolerance ±2% and 70dB ripple rejection preserve analog signal fidelity across RGB channels. |
Use Scenario: Supplying termination voltage for LVDS or RSDS differential signaling buses on motherboard or add-in cards. IC Role / Device Role / Timing Role: Low-dropout regulator delivering tightly regulated 2.5V to parallel bus termination networks. Use Value: 1.3V dropout enables operation from 3.8V rails, while fast transient response maintains termination voltage during data bursts. |
| PC Peripheral Logic Supply | Communication Interface Power |
|
Use Scenario: Powering 2.5V I/O buffers and level translators in USB hubs, SATA controllers, or PCIe switch add-on modules. IC Role / Device Role / Timing Role: Dedicated point-of-load regulator for digital logic blocks requiring independent, noise-isolated 2.5V domain. Use Value: Load regulation ≤25mV ensures consistent timing margins across varying peripheral activity states. |
Use Scenario: Supplying 2.5V to RS-485 transceivers, CAN physical layer ICs, or Ethernet PHY auxiliary rails. IC Role / Device Role / Timing Role: Clean, stable bias source for communication IC analog sections and reference circuits. Use Value: Thermal shutdown and current limit protect against fault conditions common in industrial cabling environments. |
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 |
|---|---|---|---|
| AP2112K-2.5TRG1 | 0.6A rated, 1.2V dropout at full load, SOT-23-5 package, higher quiescent current (60µA vs 10mA). | Smaller footprint but lower thermal capability; unsuitable for >300mA continuous loads without heatsinking. | Select when board space is constrained and thermal load is light; verify PCB copper area meets θJA requirements. |
| MCP1700T-2502E/TT | 250mA max output, 175mV dropout at 250mA, SOT-23 package, no current limit or thermal shutdown. | Limited to ultra-low-power applications; lacks protection features required for bus termination or VGA use. | Only consider for battery-powered sensor nodes where 250mA peak suffices and fault protection is externally managed. |
Compared with AP1115BY25L-13, AP2112K-2.5TRG1 offers lower dropout but reduced thermal robustness, while MCP1700T-2502E/TT sacrifices current capability and protection for size-neither matches the 0.6A/1.3V-dropout/thermal-shutdown combination essential for VGA and bus termination roles.
Availability
AP1115BY25L-13 is available at Aetrix Electronics and suitable for VGA card power supply, high-speed bus termination, and PC peripheral logic supply requiring stable component supply despite end-of-life status.
Supply support for AP1115BY25L-13 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 power management, signal integrity, and protection solutions for industrial, computing, and communications markets.
The AP1115 belongs to Diodes' legacy LDO regulator product line, engineered specifically for low-voltage, medium-current applications demanding high PSRR and fast transient response in cost-sensitive PC and peripheral designs.
FAQ
Is AP1115BY25L-13 still in production?
No-AP1115BY25L-13 is officially obsolete and discontinued by Diodes Incorporated as of April 2016. Aetrix Electronics maintains limited legacy stock with full traceability and provides lifecycle coordination support for ongoing production programs dependent on this part.
What is the correct pinout for AP1115BY25L-13?
AP1115BY25L-13 uses the AP1115B pinout: Pin1 = Adj(GND), Pin2 = VIN, Pin3 = VOUT. The tab is electrically connected to VIN (Pin2), not ground-critical for thermal and electrical layout. This differs from AP1115A, where the tab connects to Adj(GND).
Can AP1115BY25L-13 be used with ceramic output capacitors?
Yes, but only with careful ESR consideration: the datasheet specifies 0.15–20Ω ESR for stability. Standard X7R/X5R ceramics typically have <10mΩ ESR and may cause oscillation. Use RC-damped ceramics or add a 1–2Ω series resistor if substituting for the recommended 10µF tantalum.
What is the minimum input voltage required for 2.5V regulation?
The minimum input voltage is 3.8V: based on the 1.3V maximum dropout at 600mA, VIN must exceed VOUT by at least 1.3V to maintain regulation. At lighter loads, dropout decreases-e.g., ~0.8V at 300mA-allowing marginally lower input voltages under partial load.
AP1115BY25L-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-243AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.3V @ 600mA
- Current - Output:
- 600mA
- Current - Quiescent (Iq):
- 10 mA
- Current - Supply (Max):
- -
- PSRR:
- 60dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- 0°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89-3
AP1115BY25L-13 FAQ
1.How can I place an order for AP1115BY25L-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1115BY25L-13 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 AP1115BY25L-13 reliable?
The price and inventory of AP1115BY25L-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1115BY25L-13 is usually 5 days.
3.What payment methods are accepted for AP1115BY25L-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1115BY25L-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1115BY25L-13?
AP1115BY25L-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1115BY25L-13 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 AP1115BY25L-13?
For technical support, including AP1115BY25L-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1115BY25L-13 requirements.
6.How does Aetrix verify that AP1115BY25L-13 is sourced from the original manufacturer or authorized distributors?
All AP1115BY25L-13 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 AP1115BY25L-13 meets industry standards.
7.What is the process for return or replacement of AP1115BY25L-13?
All AP1115BY25L-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1115BY25L-13, 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 AP1115BY25L-13 part is unused and in its original packaging.
Return procedure for AP1115BY25L-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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