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Diodes Incorporated AP1115AY35G-13
- Part No.:
- AP1115AY35G-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-243AA
- Datasheet:
-
AP1115AY35G-13.pdf
- Description:
- IC REG LINEAR 3.5V 600MA SOT89-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,778
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Product details
Overview
AP1115AY35G-13 from Diodes Incorporated is a 0.6A low-dropout positive voltage regulator in fixed 3.5V output mode, housed in an SOT89-3L package with lead-free and halogen-free "Green" compliance. It delivers stable regulation with ≤1.3V dropout at full load, supports input up to 18V, and targets low-voltage logic supplies including VGA card power rails and high-speed bus termination.
For engineers reviewing the AP1115AY35G-13 datasheet, AP1115AY35G-13 pinout, AP1115AY35G-13 application, or AP1115AY35G-13 equivalent, key selection criteria include guaranteed 3.5V output accuracy (±1.4% at 10mA), thermal shutdown protection, fast transient response for dynamic loads, and compatibility with 10µF–100µF output capacitors having 0.15–20Ω ESR.
Technical Context
The AP1115AY35G-13 operates in fixed-output configuration with internal resistor divider setting VOUT = 3.5V (typical), requiring no external feedback components. Its control architecture uses a PNP pass transistor enabling low dropout and fast load-step recovery without external compensation.
It integrates current limiting (≥0.7A), thermal shutdown (TJ > +150°C), and ripple rejection of 60–70dB at 120Hz. Input-to-output differential must exceed 1.3V under 0.6A load to maintain regulation, and minimum load current is 5–10mA across –25°C to +125°C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.500V ±1.4% (2.5V–5V range supported only in adjustable version; this part is factory-trimmed fixed 3.5V) |
| Max Dropout Voltage | 1.3V at 0.6A load - enables stable 3.5V output from as low as 4.8V input supply |
| Output Current | 0.6A continuous - sufficient for powering multiple 3.3V/3.5V logic ICs or small FPGA I/O banks |
| Ripple Rejection | 60–70dB at 120Hz - suppresses switching noise from upstream DC/DC converters feeding the LDO |
| Thermal Resistance | θJA = 164°C/W (FR-4, 2oz Cu) - requires minimal PCB copper area for thermal management at full load |
| Load Regulation | ±28–35mV (0–0.6A) - ensures <1% output deviation across full current range at 5V input |
| Line Regulation | 0.2% - maintains tight output stability despite ±1V input variation within operating range |
Pinout & Package
SOT89-3L package: surface-mount, 3-terminal, thermally enhanced plastic case with exposed tab connected to VIN (Pin 3) per AP1115B pinout variant. Tab is electrically active and must be soldered to PCB copper for thermal performance and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1: Adj (GND) | Ground reference / adjust node | Internally tied to ground in fixed-mode variants like AP1115AY35G-13; serves as return path for internal bandgap reference |
| Pin 2: VOUT | Regulated output | Delivers 3.5V ±1.4%; requires ≥10µF capacitor (0.15–20Ω ESR) to ground for stability |
| Pin 3: VIN | Input supply | Accepts 5V–18V DC; must remain ≥1.3V above VOUT during transients; tab connection improves thermal dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 3.5V output | Factory-trimmed precision eliminates external resistor network, reducing BOM count and layout area |
| Fast transient response | Sub-100µs recovery from 50% load steps - critical for burst-mode digital loads on VGA or peripheral interfaces |
| Built-in thermal shutdown | Activates at TJ ≥ +150°C and auto-recovers upon cooling - prevents permanent damage during sustained overload or poor heatsinking |
| Lead-free & Green compliant | Meets RoHS 2 (2011/65/EU) and halogen/antimony limits (<900ppm Br/Cl, <1000ppm Sb) - suitable for eco-sensitive industrial and computing applications |
| Low quiescent current | Typical 5–10mA minimum load requirement - compatible with standby modes where downstream logic draws microamp-level current |
Applications
| VGA Graphics Card Power | PCI Express Peripheral Supply |
|---|---|
|
Use Scenario: Providing clean 3.5V bias to analog front-end circuitry and DACs on discrete VGA cards. IC Role / Device Role / Timing Role: Low-noise post-regulator delivering stable voltage to video signal conditioning stages. Use Value: 60–70dB ripple rejection minimizes switching artifacts in analog RGB output, preserving color fidelity. |
Use Scenario: Powering 3.3V/3.5V auxiliary rails on PCIe add-in cards such as capture devices or NVMe adapters. IC Role / Device Role / Timing Role: Local point-of-load regulator decoupling main 5V or 12V rail for noise-sensitive SerDes receivers. Use Value: Fast transient response maintains voltage within ±1% during PCIe link training bursts, preventing retraining failures. |
| Industrial HMI Display Backlight Control | Embedded Camera Interface Power |
|
Use Scenario: Supplying regulated 3.5V to LED driver ICs controlling segmented backlight zones in ruggedized HMIs. IC Role / Device Role / Timing Role: Stable voltage source enabling precise PWM dimming without output droop during duty-cycle transitions. Use Value: ≤1.3V dropout allows operation from 4.8V intermediate rail, simplifying multi-rail power tree design. |
Use Scenario: Powering MIPI CSI-2 image sensor interface circuitry in compact vision modules. IC Role / Device Role / Timing Role: Dedicated LDO for sensor I/O and PLL core, isolated from noisy processor domains. Use Value: 0.6A rating supports simultaneous activation of multiple camera lanes and on-sensor ADCs without brownout. |
Availability
AP1115AY35G-13 is available at Aetrix Electronics and suitable for VGA graphics subsystems, PCIe peripheral designs, industrial HMI displays, and embedded camera interfaces requiring stable component supply and long-term obsolescence mitigation support.
Supply support for AP1115AY35G-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 series belongs to Diodes' LDO voltage regulator product line, engineered for low-noise, low-dropout operation in space-constrained applications where reliability and thermal robustness are critical.
FAQ
Is AP1115AY35G-13 still in production?
No - Diodes Incorporated officially discontinued the AP1115 series as of April 2016. This part is obsolete with no direct replacement offered by the manufacturer. Aetrix Electronics maintains limited legacy stock for design continuity and repair programs but does not guarantee future availability.
What is the difference between AP1115A and AP1115B pinouts?
AP1115A uses Pin 1 = VOUT, Pin 2 = Adj/GND, Pin 3 = VIN; AP1115B uses Pin 1 = Adj/GND, Pin 2 = VIN, Pin 3 = VOUT. The AP1115AY35G-13 follows the AP1115B configuration, with the exposed tab electrically connected to VIN (Pin 3), requiring correct PCB pad routing to avoid shorting.
Can AP1115AY35G-13 be used with ceramic output capacitors?
Yes - the datasheet specifies stability with 10µF–100µF capacitors having ESR between 0.15Ω and 20Ω. Standard X5R/X7R ceramics (ESR ~10–50mΩ) may cause instability unless a 1–2Ω damping resistor is added in series with the capacitor, or a hybrid capacitor (ceramic + tantalum) is used per Diodes' recommended layout.
Does AP1115AY35G-13 support adjustable output via external resistors?
No - the "Y35" suffix denotes factory-trimmed fixed 3.5V output. Only the AP1115ADJ variant (no voltage suffix) supports external resistor programming. Attempts to modify AP1115AY35G-13's output using external feedback will fail because the Adj pin is internally grounded and not connected to the error amplifier.
AP1115AY35G-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
AP1115AY35G-13 FAQ
1.How can I place an order for AP1115AY35G-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1115AY35G-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 AP1115AY35G-13 reliable?
The price and inventory of AP1115AY35G-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1115AY35G-13 is usually 5 days.
3.What payment methods are accepted for AP1115AY35G-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1115AY35G-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1115AY35G-13?
AP1115AY35G-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1115AY35G-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 AP1115AY35G-13?
For technical support, including AP1115AY35G-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1115AY35G-13 requirements.
6.How does Aetrix verify that AP1115AY35G-13 is sourced from the original manufacturer or authorized distributors?
All AP1115AY35G-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 AP1115AY35G-13 meets industry standards.
7.What is the process for return or replacement of AP1115AY35G-13?
All AP1115AY35G-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1115AY35G-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 AP1115AY35G-13 part is unused and in its original packaging.
Return procedure for AP1115AY35G-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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