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Diodes Incorporated AP1115BY35L-13
- Part No.:
- AP1115BY35L-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-243AA
- Datasheet:
-
AP1115BY35L-13.pdf
- Description:
- IC REG LINEAR 3.5V 600MA SOT89-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,461
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Product details
Overview
AP1115BY35L-13 from Diodes Incorporated is a 0.6A low-dropout positive voltage regulator in fixed 3.5V output mode, housed in SOT89-3L package with pin configuration Pin1=Adj(GND), Pin2=VIN, Pin3=VOUT. It delivers stable 3.5V at up to 600mA with ≤1.3V dropout at full load and supports input voltages up to 18V. Designed for low-voltage IC supply, it serves VGA cards and high-speed bus termination.
For engineers reviewing the AP1115BY35L-13 datasheet, AP1115BY35L-13 pinout, AP1115BY35L-13 application, or AP1115BY35L-13 equivalent, key selection factors include guaranteed 3.5V output accuracy (±1%), thermal shutdown protection, fast transient response, and compatibility with 10µF–100µF output capacitors having 0.15–20Ω ESR.
Technical Context
The AP1115BY35L-13 implements a fixed-output LDO architecture with internal reference (1.25V typ), error amplifier, and PNP pass transistor. Dropout voltage remains ≤1.3V across full 0–600mA load range at TJ = +25°C, enabling regulation from 4.8V input for 3.5V output.
It features built-in current limiting (≥0.7A) and thermal shutdown triggered at TJ ≥ +150°C. Ripple rejection is 60–70dB at 120Hz with 25µF tantalum output capacitor, and line/load regulation are specified at ±0.2% and ±35mV respectively under defined test conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.500V ±1% (guaranteed 3.43–3.57V at 10mA, TA=+25°C) |
| Max Output Current | 600mA continuous (limited by thermal resistance θJA=164°C/W and power dissipation) |
| Dropout Voltage | 1.1V typical, 1.3V max at 600mA (enables 4.8V min input for stable 3.5V output) |
| Load Regulation | ≤35mV over 0–600mA load (ensures minimal output shift during dynamic current changes) |
| Ripple Rejection | 60–70dB at 120Hz (suppresses low-frequency input noise from switching supplies) |
| Thermal Shutdown | Activates at TJ ≥ +150°C (prevents permanent damage during overload or poor heatsinking) |
| Quiescent Current | 5–10mA minimum load required for regulation (defines light-load stability boundary) |
Pinout & Package
SOT89-3L package: 3-pin surface-mount, lead-free, halogen-free "Green" compound; tab connected to VIN (Pin2) per AP1115B variant; footprint per Diodes AP02001 recommended pad layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Adj/GND) | Ground reference / adjustment node | Internally tied to GND in fixed-mode; no external resistor network needed for 3.5V operation |
| Pin 2 (VIN) | Input supply terminal | Must be ≥4.8V and ≥1.3V above VOUT; requires ≥100µF input capacitor with 0.15–20Ω ESR |
| Pin 3 (VOUT) | Regulated output terminal | Delivers 3.5V ±1%; requires ≥10µF output capacitor (0.15–20Ω ESR) for stability |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 3.5V output | Eliminates external resistor divider; reduces BOM count and layout area vs adjustable variants |
| Fast transient response | Stabilizes within microseconds after load steps (e.g., <100µs for 100mA→600mA step), critical for logic rail integrity |
| Thermal shutdown | Self-protecting operation prevents failure during sustained overload or inadequate PCB copper area |
| Low-noise regulation | 60–70dB ripple rejection enables clean supply for analog/RF sections adjacent to digital logic |
| SOT89-3L package | Compact 4.5×2.5mm footprint with exposed tab for enhanced thermal conduction to PCB copper |
Applications
| VGA Graphics Card Power | PCI Express Bus Termination |
|---|---|
Use Scenario: Providing dedicated 3.5V bias for analog video DACs and timing circuits on discrete VGA cards. IC Role / Device Role / Timing Role: Primary low-noise analog supply regulator ensuring stable reference for 8-bit RGB DACs and sync generators. Use Value: Maintains <±0.5% output deviation across -25°C to +85°C ambient, preserving color fidelity and horizontal sync stability. |
Use Scenario: Supplying termination voltage for PCIe Gen1/Gen2 receiver inputs requiring precise 3.3–3.5V rails. IC Role / Device Role / Timing Role: Fixed-output LDO delivering clean, low-ripple 3.5V to parallel termination networks on high-speed serial lanes. Use Value: 60–70dB ripple rejection suppresses switching noise from nearby DC/DC converters, reducing bit error rate in 2.5Gbps links. |
| Industrial I/O Module Logic Supply | Embedded Controller Peripheral Rail |
Use Scenario: Powering 3.3V/3.5V-compatible FPGA I/O banks and isolated level-shifters in programmable logic controllers. IC Role / Device Role / Timing Role: Secondary regulated rail decoupled from main 5V system supply, supporting mixed-voltage I/O interfacing. Use Value: 1.3V dropout allows use with 5V intermediate bus, minimizing heat generation versus higher-dropout alternatives. |
Use Scenario: Supplying auxiliary 3.5V rail to USB PHY transceivers, SD card interfaces, and real-time clock modules in ARM-based edge devices. IC Role / Device Role / Timing Role: Dedicated low-quiescent LDO ensuring stable voltage during deep-sleep states and rapid wake-up transitions. Use Value: 5–10mA minimum load requirement aligns with typical peripheral leakage, avoiding regulation loss in standby mode. |
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 |
|---|---|---|---|
| MCP1703T-3502E/MB | 3.5V fixed, 250mA max, 600mV dropout, SOT23-5 package | Lower current rating and smaller package limit use to low-power peripherals only | Select when board space is constrained and load never exceeds 250mA |
| TPS7A2035PDQNR | 3.5V fixed, 300mA max, 170mV dropout, ultra-low IQ (6.5µA), X2SON-4 | Insufficient current capacity for 600mA VGA loads; optimized for battery-powered sleep modes | Prefer for always-on sensor nodes where quiescent current dominates lifetime analysis |
Compared with MCP1703T-3502E/MB and TPS7A2035PDQNR, AP1115BY35L-13 uniquely supports 600mA at ≤1.3V dropout in SOT89-3L, making it suitable for thermally demanding, medium-current applications where higher current capability outweighs ultra-low IQ or ultra-low dropout requirements.
Availability
AP1115BY35L-13 is available at Aetrix Electronics and suitable for VGA graphics card power, PCIe bus termination, and industrial I/O module logic supply requiring stable component supply despite end-of-life status.
Supply support for AP1115BY35L-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, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.
The AP1115 belongs to Diodes' legacy LDO regulator product line, engineered for cost-sensitive, medium-current applications in PC peripherals and communications infrastructure where reliability and thermal robustness are prioritized over ultra-low quiescent current.
FAQ
Is AP1115BY35L-13 still in production?
No - Diodes Incorporated officially discontinued AP1115BY35L-13 as of April 2016 (DS31026 Rev. 6-4). It is marked "OBSOLETE – PART DISCONTINUED" in all official documentation. Aetrix Electronics maintains limited legacy stock with full traceability and offers lifecycle coordination support for ongoing production builds.
What is the correct pinout for AP1115BY35L-13?
AP1115BY35L-13 follows the AP1115B pinout: Pin1 = Adj/GND (internally grounded for fixed 3.5V mode), Pin2 = VIN (tab-connected), Pin3 = VOUT. This differs from AP1115A (Pin1=VOUT, Pin2=Adj/GND, Pin3=VIN) and must be verified using top-view marking "JS" or "JY" per Diodes' marking guide.
Can AP1115BY35L-13 replace AP1115-3.3 or AP1115-5.0 variants?
No - AP1115BY35L-13 is factory-trimmed for 3.5V output only and cannot be reconfigured. Its internal feedback network fixes VOUT at 3.5V ±1%. Substituting it for 3.3V or 5.0V variants would cause functional failure unless circuit tolerances accommodate the 0.2V or 1.5V offset, which is not recommended.
What output capacitor is required for stability?
A minimum 10µF output capacitor with ESR between 0.15Ω and 20Ω is mandatory for stability, per datasheet Section 4. Tantalum (e.g., 10–100µF, 2.5V rating) or low-ESR aluminum polymer capacitors are validated. Ceramic capacitors alone are insufficient due to excessively low ESR causing oscillation.
AP1115BY35L-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):
- 3.5V
- 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
AP1115BY35L-13 FAQ
1.How can I place an order for AP1115BY35L-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1115BY35L-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 AP1115BY35L-13 reliable?
The price and inventory of AP1115BY35L-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1115BY35L-13 is usually 5 days.
3.What payment methods are accepted for AP1115BY35L-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1115BY35L-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1115BY35L-13?
AP1115BY35L-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1115BY35L-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 AP1115BY35L-13?
For technical support, including AP1115BY35L-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1115BY35L-13 requirements.
6.How does Aetrix verify that AP1115BY35L-13 is sourced from the original manufacturer or authorized distributors?
All AP1115BY35L-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 AP1115BY35L-13 meets industry standards.
7.What is the process for return or replacement of AP1115BY35L-13?
All AP1115BY35L-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1115BY35L-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 AP1115BY35L-13 part is unused and in its original packaging.
Return procedure for AP1115BY35L-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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