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Diodes Incorporated AP1115AY15L-13
- Part No.:
- AP1115AY15L-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-243AA
- Datasheet:
-
AP1115AY15L-13.pdf
- Description:
- IC REG LINEAR 1.5V 600MA SOT89-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,320
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Product details
Overview
AP1115AY15L-13 from Diodes Incorporated is a 0.6A low-dropout positive fixed-mode voltage regulator with 1.5V output, SOT89-3L package, and guaranteed ≤1.3V dropout at full load. It delivers stable 1.5V supply for low-voltage ICs in high-speed bus termination and PC peripheral logic rails, supporting input up to 18V.
For engineers reviewing the AP1115AY15L-13 datasheet, AP1115AY15L-13 pinout, AP1115AY15L-13 application, or AP1115AY15L-13 equivalent, key selection criteria include dropout voltage at 600mA, thermal shutdown behavior, output voltage accuracy over temperature, and SOT89-3L thermal resistance (θJA = 164°C/W).
Technical Context
The AP1115AY15L-13 operates in fixed-output mode (1.5V) with internal reference and error amplifier driving a PNP pass transistor. Its control loop ensures fast transient response and maintains regulation down to 1.5V output with ≥3V input-enabling use in 3.3V/5V rail-down conversion.
It integrates current limiting and thermal shutdown circuitry that activate at ~150°C junction temperature and ~0.7A short-circuit current. Output stability requires ≥10µF capacitor with ESR between 0.15Ω and 20Ω, per design constraints validated in typical application circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.470–1.530V at 10mA, 3–12V input - ensures ±2% tolerance for 1.5V logic supply compliance |
| Dropout Voltage | ≤1.3V at 0.6A load - enables regulation from 2.8V input, critical for low-headroom 3.3V-to-1.5V conversion |
| Load Regulation | 12–15mV across 0–0.6A - limits output shift under dynamic CPU/GPU load steps in peripherals |
| Ripple Rejection | 60–70dB at 120Hz - suppresses switching noise from upstream DC/DC converters feeding the LDO |
| Thermal Resistance θJA | 164°C/W (no heatsink, FR-4, 2oz Cu) - defines max power dissipation (~5W absolute max) before thermal shutdown |
| Quiescent Current | 5–10mA minimum load required - sets lower bound for standby current in always-on peripheral modules |
Pinout & Package
SOT89-3L package with exposed tab (Pin 3), RoHS-compliant and halogen-free "Green" molding compound. Tab is electrically connected to Pin 1 (VOUT) in AP1115A variant - critical for thermal path and PCB copper pour design.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (VOUT) | Regulated output node | Connected to exposed tab; requires ≥10µF output capacitor (ESR 0.15–20Ω) for stability |
| Pin 2 (Adj/GND) | Ground reference / adjustment node | Fixed-mode tie to GND; no external resistor divider needed - simplifies layout vs adjustable variants |
| Pin 3 (VIN) | Unregulated input supply | Must be ≥1.3V above VOUT at full load; requires bulk input capacitor to prevent sag during transients |
Key Features
| Feature | Design Value |
|---|---|
| Fast transient response | Sub-100µs recovery from 100mA→600mA load step - maintains voltage within ±30mV for PCIe/USB interface rails |
| Built-in thermal shutdown | Activates at ~150°C junction temperature - protects against sustained overload or poor heatsinking in compact enclosures |
| Output current limiting | Guaranteed ≥0.7A foldback limit - prevents damage during short-circuit events without external fusing |
| Good noise rejection | 70dB @ 120Hz - attenuates ripple from AC/DC adapters or buck converter switching frequencies |
Applications
| PC Peripheral Power | VGA Card Logic Supply |
|---|---|
|
Use Scenario: Providing clean 1.5V bias for DDR memory termination resistors on USB 3.0 hubs and SATA controllers. IC Role / Device Role / Timing Role: Fixed-output LDO delivering stable voltage to high-speed bus termination networks. Use Value: Maintains signal integrity by minimizing VTT rail deviation during hot-plug transients (±15mV load regulation). |
Use Scenario: Generating 1.5V core voltage for VGA controller I/O buffers and DAC reference circuitry. IC Role / Device Role / Timing Role: Low-noise local regulator decoupling analog and digital sections of legacy graphics hardware. Use Value: 70dB ripple rejection suppresses switching noise from main 12V DC/DC, preventing color banding artifacts. |
| Low-Voltage Bus Termination | Embedded Controller I/O Rail |
|
Use Scenario: Supplying 1.5V to parallel SCSI or PCI-X termination networks in industrial backplanes. IC Role / Device Role / Timing Role: Precision voltage source maintaining termination impedance accuracy across temperature. Use Value: ±0.6% temperature stability ensures <±1% VTT drift from −40°C to +85°C ambient. |
Use Scenario: Powering GPIO banks and UART interfaces in fanless embedded controllers with 3.3V main rail. IC Role / Device Role / Timing Role: Secondary LDO enabling independent voltage scaling for low-power I/O domains. Use Value: 1.3V dropout allows operation from 2.8V backup supply during brownout conditions. |
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 |
|---|---|---|---|
| MCP1700T-1502E/MB | 250mA output, 6µA quiescent current, SOT23-3 package | Lower current capacity; suited for ultra-low-power microcontroller I/O only | Select when standby current <10µA is mandatory and load ≤200mA |
| TPS7A2015PDBVR | 300mA output, 6.5µA IQ, 165mV dropout at 300mA, WSON-6 package | Higher PSRR (75dB), smaller footprint, but lower max current and no thermal shutdown latch | Select for noise-sensitive analog sensors where 300mA suffices and board space is constrained |
Compared with AP1115AY15L-13, MCP1700T-1502E/MB trades 0.6A capability for nanoamp quiescent current, while TPS7A2015PDBVR offers superior noise performance in half the footprint but lacks thermal fault latching - making AP1115AY15L-13 optimal for robust 0.6A industrial peripheral rails.
Availability
AP1115AY15L-13 is available at Aetrix Electronics and suitable for PC peripheral power, VGA card logic supply, and low-voltage bus termination requiring stable component supply despite end-of-life status.
Supply support for AP1115AY15L-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' legacy LDO regulator product line, engineered for cost-sensitive, medium-current applications demanding reliability and wide-input-voltage operation in compact SOT89 packages.
FAQ
Is AP1115AY15L-13 still in production?
No - Diodes Incorporated officially discontinued AP1115AY15L-13 as of April 2016 (DS31026 Rev. 6-4). Aetrix Electronics maintains limited legacy stock with full traceability and provides lifecycle coordination support for ongoing production programs.
What is the thermal shutdown threshold and recovery behavior?
The device activates thermal shutdown at approximately 150°C junction temperature and remains latched off until junction cools below ~135°C. This hysteresis prevents cycling during sustained overload and is verified in thermal regulation testing per DS31026 Section 4.
Can AP1115AY15L-13 replace adjustable AP1115 variants in existing designs?
No - AP1115AY15L-13 is fixed at 1.5V with Pin 2 internally tied to GND. Substituting it for an adjustable AP1115B requires removing the R1/R2 feedback network and confirming VIN ≥2.8V; output accuracy and load regulation will differ per datasheet tables.
What capacitor ESR range is mandatory for stability?
A minimum 10µF output capacitor with ESR between 0.15Ω and 20Ω is required for stability, as confirmed in the "Capacitor Selection" section of DS31026. Tantalum or low-ESR aluminum electrolytic capacitors meet this spec; ceramic caps require series resistance to avoid oscillation.
AP1115AY15L-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-243AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 1.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.1V @ 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
AP1115AY15L-13 FAQ
1.How can I place an order for AP1115AY15L-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1115AY15L-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 AP1115AY15L-13 reliable?
The price and inventory of AP1115AY15L-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1115AY15L-13 is usually 5 days.
3.What payment methods are accepted for AP1115AY15L-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1115AY15L-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1115AY15L-13?
AP1115AY15L-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1115AY15L-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 AP1115AY15L-13?
For technical support, including AP1115AY15L-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1115AY15L-13 requirements.
6.How does Aetrix verify that AP1115AY15L-13 is sourced from the original manufacturer or authorized distributors?
All AP1115AY15L-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 AP1115AY15L-13 meets industry standards.
7.What is the process for return or replacement of AP1115AY15L-13?
All AP1115AY15L-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1115AY15L-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 AP1115AY15L-13 part is unused and in its original packaging.
Return procedure for AP1115AY15L-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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