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Diodes Incorporated AP1115BY25G-13
- Part No.:
- AP1115BY25G-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-243AA
- Datasheet:
-
AP1115BY25G-13.pdf
- Description:
- IC REG LINEAR 2.5V 600MA SOT89-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,456
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Product details
Overview
AP1115BY25G-13 from Diodes Incorporated is a 0.6A low-dropout positive voltage regulator in fixed 2.5V output mode, housed in a SOT89-3L package with VIN–VOUT dropout ≤1.3V at full load. It delivers stable 2.5V/0.6A for low-current logic supplies and high-speed bus termination, with guaranteed thermal shutdown, fast transient response, and ≥60dB ripple rejection at 120Hz.
For engineers reviewing the AP1115BY25G-13 datasheet, AP1115BY25G-13 pinout, AP1115BY25G-13 application, or AP1115BY25G-13 equivalent, key selection criteria include dropout voltage under 1.3V at 600mA, fixed 2.5V output accuracy (±2%), SOT89-3L thermal resistance (θJA = 164°C/W), and compatibility with 10µF–100µF output capacitors (ESR 0.15–20Ω).
Technical Context
The AP1115BY25G-13 operates in fixed-output mode with internal resistor divider setting VOUT = 2.5V ±2% at 10mA, maintaining regulation across 4V ≤ VIN ≤ 12V input range. Its control architecture integrates thermal shutdown and current limiting, with dropout defined at ΔVOUT = 1% of nominal output.
Stability requires a minimum 10µF output capacitor (ESR 0.15–20Ω); input capacitance ≥100µF ensures transient immunity. Line regulation is ≤0.2% over VIN = VOUT + 1.5V to 15V, and load regulation is ≤25mV from 0 to 600mA at VIN = 4V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±2% (2.45–2.55V) at 10mA, ensuring TTL/CMOS-compatible supply for 2.5V logic rails |
| Max Dropout Voltage | 1.3V at 600mA load, enabling 2.5V output from as low as 3.8V input (e.g., 5V rail with margin) |
| Output Current | 0.6A continuous, sufficient for multiple low-power ICs on a single rail (e.g., FPGA I/O banks or DDR termination) |
| Ripple Rejection | 60–70dB at 120Hz with 25µF tantalum output cap, suppressing switching noise from upstream DC/DC converters |
| Thermal Resistance | θJA = 164°C/W (FR-4, 2oz Cu), requiring heatsinking above ~350mW dissipation in still air |
| Quiescent Current | 5–10mA minimum load required for regulation, compatible with standby modes where load drops near zero |
| ESR Range | 0.15–20Ω for output capacitor, supporting low-ESR ceramic or standard tantalum without oscillation risk |
Pinout & Package
SOT89-3L package with exposed tab electrically connected to VIN (Pin 2 per AP1115B variant); compact 4.5×2.5mm footprint optimized for thermal conduction to PCB copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Adj/GND) | Ground reference / adjustment node | Connected to system GND; not used for voltage setting in fixed-mode variants like BY25 |
| Pin 2 (VIN) | Regulator input | Primary power input; tab is electrically tied to this pin-must be routed to input plane for thermal performance |
| Pin 3 (VOUT) | Regulated output | Delivers 2.5V; requires ≥10µF capacitor (0.15–20Ω ESR) directly to GND for stability |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 2.5V output | Eliminates external resistor network, reducing BOM count and layout area vs. adjustable LDOs |
| 1.3V max dropout at 0.6A | Enables efficient operation from 3.3V or 5V rails with minimal headroom-critical for multi-rail systems |
| Built-in thermal shutdown | Protects against sustained overload or poor heatsinking; auto-recovery after junction cools below 150°C |
| Fast transient response | Sub-100µs recovery from 50% load step (e.g., 0→300mA), minimizing voltage dip on sensitive logic |
| Lead-free & halogen-free | RoHS 2 and "Green" compliant (Br/Cl <900ppm each, Sb <1000ppm), meeting strict environmental mandates |
Applications
| VGA Graphics Card Power | PCI Express Bus Termination |
|---|---|
|
Use Scenario: Providing clean 2.5V supply to analog front-end circuitry and DACs on legacy VGA cards. IC Role / Device Role / Timing Role: Primary low-noise voltage source for video signal conditioning stages requiring tight DC accuracy and low ripple. Use Value: 60–70dB ripple rejection suppresses switching noise from GPU core supplies, preserving analog video SNR. |
Use Scenario: Supplying termination voltage (VTT) for PCIe Gen1/Gen2 differential pairs on add-in cards. IC Role / Device Role / Timing Role: Stable 2.5V reference for parallel bus termination resistors, ensuring impedance matching and signal integrity. Use Value: Fast transient response maintains VTT within ±3% during rapid data bursts, preventing bit errors on high-speed links. |
| Industrial Sensor Interface Module | Embedded Microcontroller I/O Rail |
|
Use Scenario: Powering 2.5V-output precision ADCs and op-amps in factory-floor sensor signal chains. IC Role / Device Role / Timing Role: Low-drift, low-noise local regulator isolating analog circuitry from noisy digital power domains. Use Value: 0.6% temperature stability over 0–125°C minimizes gain drift in calibrated measurement systems. |
Use Scenario: Delivering 2.5V to GPIO banks and peripheral interfaces of ARM Cortex-M microcontrollers. IC Role / Device Role / Timing Role: Dedicated I/O voltage rail decoupled from core logic supply to prevent cross-talk during state transitions. Use Value: 25mV load regulation from 0–600mA ensures consistent drive strength across all I/O pins under varying peripheral loads. |
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, 2.5V fixed, SOT23-5 package; higher dropout (1.6V @ 600mA); no thermal shutdown | Limited thermal robustness in high-ambient environments; smaller footprint but lower power handling | Select only if board space is constrained and thermal margin exceeds 25°C above ambient |
| MCP1700T-2502E/MB | 250mA max output, 2.5V fixed, SOT23-3; 6µA quiescent current; 175mV dropout @ 250mA | Insufficient current for multi-load 2.5V rails; suited for ultra-low-power sensors, not bus termination | Choose only for battery-powered nodes where 0.6A capability is unnecessary and IQ <10µA is mandatory |
Compared with AP1115BY25G-13, AP2112K-2.5TRG1 trades thermal safety and dropout performance for size, while MCP1700T-2502E/MB sacrifices output current for ultra-low IQ-neither matches the 0.6A/1.3V/thermal-shutdown triad essential for industrial bus and graphics applications.
Availability
AP1115BY25G-13 is available at Aetrix Electronics and suitable for VGA graphics card power, PCIe bus termination, and industrial sensor interface modules requiring stable component supply despite its obsolete status and limited remaining stock.
Supply support for AP1115BY25G-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 consumer markets.
The AP1115 belongs to Diodes' LDO voltage regulator product line, engineered for cost-sensitive, space-constrained applications demanding reliable low-dropout regulation with integrated protection features.
FAQ
Is AP1115BY25G-13 still in production?
No-AP1115BY25G-13 is officially obsolete and discontinued by Diodes Incorporated as of April 2016. Aetrix Electronics holds remaining authorized inventory for last-time purchase; no new manufacturing runs are planned, and no second-source replacements exist with identical SOT89-3L pinout and 0.6A/1.3V dropout specs.
What is the correct output capacitor for stability?
A minimum 10µF capacitor with ESR between 0.15Ω and 20Ω must be placed directly between VOUT and GND. Diodes recommends 100µF tantalum or low-ESR aluminum electrolytic for optimal transient response; ceramic capacitors require series resistance ≥0.15Ω to meet ESR spec and avoid instability.
Can AP1115BY25G-13 be used with a 3.3V input?
No-minimum input voltage is 4.0V for 2.5V output regulation. At 3.3V input, the device enters dropout (VIN – VOUT < 1.3V), causing unregulated output and potential thermal stress. Valid input range is 4.0V to 12V per datasheet Section 5.
How does the SOT89-3L tab connection affect PCB layout?
In AP1115B variants (including BY25), the exposed tab is electrically connected to PIN 2 (VIN), not GND. Layout must tie the tab pad exclusively to the input voltage plane-not GND-to prevent short circuits and ensure proper thermal conduction from the die to the input copper pour.
AP1115BY25G-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
AP1115BY25G-13 FAQ
1.How can I place an order for AP1115BY25G-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1115BY25G-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 AP1115BY25G-13 reliable?
The price and inventory of AP1115BY25G-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1115BY25G-13 is usually 5 days.
3.What payment methods are accepted for AP1115BY25G-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1115BY25G-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1115BY25G-13?
AP1115BY25G-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1115BY25G-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 AP1115BY25G-13?
For technical support, including AP1115BY25G-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1115BY25G-13 requirements.
6.How does Aetrix verify that AP1115BY25G-13 is sourced from the original manufacturer or authorized distributors?
All AP1115BY25G-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 AP1115BY25G-13 meets industry standards.
7.What is the process for return or replacement of AP1115BY25G-13?
All AP1115BY25G-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1115BY25G-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 AP1115BY25G-13 part is unused and in its original packaging.
Return procedure for AP1115BY25G-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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