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Diodes Incorporated AP1115AYG-13
- Part No.:
- AP1115AYG-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-243AA
- Datasheet:
-
AP1115AYG-13.pdf
- Description:
- IC REG LIN POS ADJ 600MA SOT89-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,732
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Product details
Overview
AP1115AYG-13 from Diodes Incorporated is a 0.6A low-dropout positive voltage regulator available in fixed 3.3V output mode, housed in a lead-free SOT89-3L package. It delivers stable regulation with ≤1.3V dropout at full load, supports input voltages up to 18V, and is designed for low-voltage IC supply applications including VGA card power rails and high-speed bus termination.
For engineers reviewing the AP1115AYG-13 datasheet, AP1115AYG-13 pinout, AP1115AYG-13 application, or AP1115AYG-13 equivalent, key selection criteria include guaranteed 3.3V ±1% output accuracy at 10mA, 26mV load regulation over 0–0.6A, thermal shutdown protection, and compatibility with 100µF output capacitance (ESR 0.15–20Ω) for stability.
Technical Context
The AP1115AYG-13 operates in fixed-output mode with internal feedback network set for 3.3V nominal output. Its LDO architecture uses a PNP pass transistor to achieve low dropout while maintaining fast transient response-demonstrated by <±40mV output deviation during 100mA–600mA load steps within 200µs.
It integrates current limiting and thermal shutdown circuitry, with junction temperature limited to +150°C. The device requires no external compensation and achieves 70dB ripple rejection at 120Hz with 25µF tantalum output capacitor, supporting clean supply generation in noise-sensitive analog and digital logic domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.300 V ±1% (guaranteed at 10mA, 4.8V ≤ VIN ≤ 12V) |
| Max Dropout Voltage | 1.3 V at 0.6A load (ensures regulation down to VIN = VOUT + 1.3V) |
| Load Regulation | 26 mV (0–0.6A, VIN = 5V; ensures minimal output shift under dynamic load) |
| Ripple Rejection | 70 dB at 120Hz (with 25µF tantalum Cout; suppresses AC ripple from upstream supplies) |
| Thermal Resistance θJA | 164 °C/W (on FR-4, 2oz Cu, min pad layout; defines max power dissipation without heatsink) |
| Quiescent Current | 5–10 mA minimum load required for regulation (sets lower bound for light-load stability) |
| ESR Range (Cout) | 0.15–20 Ω (specifies capacitor impedance window for guaranteed loop stability) |
Pinout & Package
SOT89-3L package with exposed tab electrically connected to Pin 2 (VIN) per AP1115B configuration - confirmed by marking code "YG" (Y = year code, G = Green/lead-free), ordering suffix "-13", and Diodes Inc. pin assignment diagrams for AP1115B variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Adj/GND) | Ground reference / adjust node | Internally tied to GND in fixed-mode; must be grounded externally for AP1115AYG-13 operation |
| Pin 2 (VIN) | Input supply terminal | Primary power entry; tab is electrically connected to this pin - requires thermal pad connection to PCB copper for heat dissipation |
| Pin 3 (VOUT) | Regulated output terminal | Delivers 3.3V output; requires ≥100µF capacitor (0.15–20Ω ESR) to ground for stability per datasheet Figure 1 |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 3.3V output with ±1% tolerance | Eliminates external resistor divider; reduces BOM count and layout area for standard logic rail |
| 1.3V max dropout at 0.6A | Enables operation from 4.6V input (e.g., 5V rail with 0.4V drop) while sustaining full load |
| Built-in thermal shutdown | Protects against sustained overload or poor PCB thermal design; auto-recovery on cooldown |
| 60–70dB ripple rejection | Reduces need for additional LC filtering when deriving 3.3V from noisy switcher outputs |
| SOT89-3L green package | Halogen- and antimony-free, RoHS-compliant construction with <900ppm Br/Cl and <1000ppm Sb |
Applications
| VGA Graphics Card Power | PCI Express Bus Termination |
|---|---|
|
Use Scenario: Providing clean 3.3V bias to analog front-end circuitry and DACs on discrete GPU boards. IC Role / Device Role / Timing Role: Primary low-noise post-regulator for video signal chain components requiring stable reference voltage. Use Value: 70dB ripple rejection and <26mV load regulation ensure minimal noise coupling into sensitive analog video paths. |
Use Scenario: Supplying termination voltage (VTT) for PCIe Gen1/Gen2 differential pairs on add-in cards. IC Role / Device Role / Timing Role: Fixed 3.3V LDO delivering precise, low-impedance termination supply synchronized to data eye timing. Use Value: Fast transient response (<200µs settling) maintains VTT stability during high-speed link training and data bursts. |
| Industrial I/O Module Logic Rail | Embedded Network Controller Supply |
|
Use Scenario: Powering 3.3V microcontroller peripherals (UART, SPI, GPIO) in DIN-rail mounted PLC I/O modules. IC Role / Device Role / Timing Role: Local point-of-load regulator decoupling MCU core from shared 5V/12V backplane supply. Use Value: 164°C/W θJA enables operation at full 0.6A load in sealed enclosures without forced air cooling. |
Use Scenario: Generating 3.3V supply for Ethernet PHYs and MAC controllers in fanless network appliances. IC Role / Device Role / Timing Role: Low-noise, thermally robust regulator supporting deterministic packet processing timing. Use Value: Thermal shutdown and current limiting prevent system lockup during PHY surge events or cable fault conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP2112K-3.3TRG1 | 0.6A fixed 3.3V LDO in SOT23-5; 350mV typical dropout; no thermal shutdown | Smaller footprint but lower thermal robustness; unsuitable for >50°C ambient without derating | Select only if board space is critical and thermal margin exceeds 40°C above ambient |
| MCP1700T-3302E/MB | 250mA fixed 3.3V LDO in SOT23-3; 178mV typical dropout; integrated enable pin | Lower current rating limits use to ultra-low-power MCU peripherals only | Choose only for battery-powered sensor nodes where quiescent current <2µA is mandatory |
Compared with AP1115AYG-13, AP2112K-3.3TRG1 trades thermal safety for size, while MCP1700T-3302E/MB sacrifices output current for ultra-low IQ - neither matches the 0.6A capability, 1.3V dropout headroom, or integrated thermal protection of the AP1115AYG-13 in industrial 3.3V rail applications.
Availability
AP1115AYG-13 is available at Aetrix Electronics and suitable for VGA graphics card power, PCIe bus termination, and industrial I/O module logic rails requiring stable component supply despite product discontinuation status.
Supply support for AP1115AYG-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 high-reliability power management and signal integrity solutions for industrial, computing, and communications markets.
The AP1115 belongs to Diodes' legacy LDO regulator product line, engineered specifically for cost-sensitive, medium-current (≤0.6A) applications demanding low dropout, fixed-output simplicity, and robust thermal behavior in compact SOT89 packaging.
FAQ
Is AP1115AYG-13 still in active production?
No - Diodes Incorporated officially discontinued the AP1115 family in April 2016, as stated in DS31026 Rev. 6-4. Aetrix Electronics maintains limited legacy stock with full traceability and provides last-time-buy support, including batch documentation and RoHS compliance verification per original manufacturing records.
What is the correct pin configuration for AP1115AYG-13?
AP1115AYG-13 uses the AP1115B pinout: Pin 1 = Adj/GND (tied to ground), Pin 2 = VIN (connected to tab), Pin 3 = VOUT. This is confirmed by the "YG" marking code, SOT89-3L package outline, and Diodes' ordering matrix specifying "B" version for fixed-output variants with tab-to-VIN connection.
Can AP1115AYG-13 replace adjustable AP1115 variants in existing designs?
Yes, provided the external resistor divider is removed and Pin 1 is hard-grounded. The internal feedback network fixes VOUT to 3.3V, eliminating adjustment range but improving accuracy and reducing component count. Output capacitor requirements (100µF, 0.15–20Ω ESR) remain identical.
Does AP1115AYG-13 require an input capacitor?
Yes - a minimum 100µF input capacitor (0.15–20Ω ESR) is required between VIN and GND per datasheet Section 7.1 to prevent input voltage sag during load transients. Without it, the device may fail to regulate under step-load conditions due to insufficient charge reservoir at the input node.
AP1115AYG-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:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- 5V
- 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
AP1115AYG-13 FAQ
1.How can I place an order for AP1115AYG-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1115AYG-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 AP1115AYG-13 reliable?
The price and inventory of AP1115AYG-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1115AYG-13 is usually 5 days.
3.What payment methods are accepted for AP1115AYG-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1115AYG-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1115AYG-13?
AP1115AYG-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1115AYG-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 AP1115AYG-13?
For technical support, including AP1115AYG-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1115AYG-13 requirements.
6.How does Aetrix verify that AP1115AYG-13 is sourced from the original manufacturer or authorized distributors?
All AP1115AYG-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 AP1115AYG-13 meets industry standards.
7.What is the process for return or replacement of AP1115AYG-13?
All AP1115AYG-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1115AYG-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 AP1115AYG-13 part is unused and in its original packaging.
Return procedure for AP1115AYG-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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