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Diodes Incorporated AP1115BY28L-13
- Part No.:
- AP1115BY28L-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-243AA
- Datasheet:
-
AP1115BY28L-13.pdf
- Description:
- IC REG LINEAR 2.8V 600MA SOT89-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,343
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Product details
Overview
AP1115BY28L-13 from Diodes Incorporated is a 0.6A low-dropout positive fixed-mode voltage regulator with 2.8V output, SOT89-3L package, <1.3V dropout at full load, and integrated thermal shutdown - designed for stable 2.8V supply in VGA cards and low-current logic applications.
For engineers reviewing the AP1115BY28L-13 datasheet, AP1115BY28L-13 pinout, AP1115BY28L-13 application, or AP1115BY28L-13 equivalent, key selection criteria include guaranteed dropout ≤1.3V at 600mA, fixed 2.8V output accuracy (±1.2% at 10mA), SOT89-3L thermal resistance (θJA = 164°C/W), and compatibility with 100µF output capacitors (ESR 0.15–20Ω).
Technical Context
The AP1115BY28L-13 operates in fixed-output mode (2.8V) with internal reference voltage of 1.25V and precision resistor divider network. It uses PNP pass transistor architecture enabling low dropout and fast transient response to load steps up to 600mA.
Regulation relies on feedback from VOUT to internal error amplifier; input voltage must exceed VOUT by ≥1.3V for proper operation. Built-in current limiting and thermal shutdown activate at ~150°C junction temperature, ensuring safe operation under overload or ambient stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.800V ±1.2% at 10mA (ensures stable 2.8V rail for I/O interfaces) |
| Max Dropout Voltage | 1.3V at 600mA (enables regulation from 4.3V input down to 2.8V output) |
| Output Current | 0.6A continuous (supports moderate-power peripherals without external boost) |
| Ripple Rejection | 60–70dB at 120Hz (suppresses AC ripple from switching supplies feeding VIN) |
| Thermal Resistance | θJA = 164°C/W (requires minimal PCB copper area for 0°C–125°C operation) |
| Load Regulation | 22–28mV over 0–600mA (maintains tight voltage control across dynamic loads) |
| Quiescent Current | 5–10mA minimum load required (prevents regulation loss at light loads) |
Pinout & Package
SOT89-3L package with exposed tab for thermal conduction; lead-free, halogen-free "Green" construction per Diodes Inc. specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1: Adj (GND) | Ground reference / adjustment node | Internally tied to GND in fixed-mode; serves as feedback reference point for output voltage setting |
| Pin 2: VIN | Input supply connection | Must be ≥4.3V (2.8V + 1.3V dropout) and decoupled with ≥100µF capacitor (ESR 0.15–20Ω) |
| Pin 3: VOUT | Regulated output terminal | Delivers 2.8V ±1.2%; requires ≥10µF output capacitor (ESR 0.15–20Ω) for stability |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 2.8V output | Eliminates external resistor network; reduces BOM count and layout complexity for dedicated 2.8V rails |
| Fast transient response | Stabilizes within microseconds during 100mA–600mA load steps - critical for bus termination transients |
| Built-in thermal shutdown | Activates at ~150°C junction temperature, preventing permanent damage during sustained overload or poor heatsinking |
| Low-noise regulation | 60–70dB ripple rejection enables clean power delivery to noise-sensitive analog or mixed-signal ICs |
| SOT89-3L "Green" package | Halogen- and antimony-free molding compound (<900ppm Br/Cl, <1000ppm Sb) meets strict environmental compliance requirements |
Applications
| VGA Graphics Card Power | PCI Express I/O Interface |
|---|---|
Use Scenario: Providing stable 2.8V supply to analog front-end circuitry and DAC buffers on discrete VGA cards. IC Role / Device Role / Timing Role: Fixed-output LDO regulator delivering clean, low-noise bias for video signal conditioning stages. Use Value: Maintains <±1.2% output accuracy across 0–600mA load range, minimizing color distortion and sync jitter. |
Use Scenario: Powering 2.8V auxiliary logic on PCIe add-in cards requiring precise voltage for configuration registers and sideband signals. IC Role / Device Role / Timing Role: Primary 2.8V rail generator with fast transient response to handle hot-plug detection pulses and link training bursts. Use Value: 1.3V dropout enables use of 4.3V intermediate rail, reducing heat generation versus higher-dropout alternatives. |
| Industrial Sensor Interface Module | Embedded Display Backlight Control |
Use Scenario: Supplying 2.8V to precision ADC reference buffers and op-amp signal chains in 4–20mA loop-powered sensors. IC Role / Device Role / Timing Role: Low-noise, thermally robust voltage source ensuring measurement stability over -40°C to +85°C ambient. Use Value: 60–70dB ripple rejection prevents switching noise from corrupting sub-mV-level sensor signals. |
Use Scenario: Generating 2.8V bias for LED driver IC logic and PWM control circuitry in compact LCD backlight modules. IC Role / Device Role / Timing Role: Compact, thermally efficient LDO supporting space-constrained designs with minimal external components. Use Value: SOT89-3L package with θJA = 164°C/W allows direct mounting on FR-4 with 2oz copper - no heatsink needed. |
Availability
AP1115BY28L-13 is available at Aetrix Electronics and suitable for VGA graphics cards, PCI Express interface modules, and industrial sensor interface circuits requiring stable component supply with long-term lifecycle visibility.
Supply support for AP1115BY28L-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, signal integrity, and protection solutions for industrial and computing markets.
The AP1115 series belongs to Diodes' LDO voltage regulator product line, engineered for low-dropout, low-noise, and thermally robust operation in space-constrained board-level power applications.
FAQ
What is the minimum input voltage required for AP1115BY28L-13 to regulate at full 0.6A load?
The AP1115BY28L-13 requires VIN ≥ 4.3V (2.8V + 1.3V max dropout) to maintain regulation at 600mA. Below this, output voltage collapses linearly with input; datasheet guarantees regulation only when VIN exceeds VOUT by ≥1.3V under full load.
Can AP1115BY28L-13 be used with ceramic output capacitors?
Yes, but only if ESR is ≥0.15Ω - standard X7R/X5R ceramics typically have ESR <0.05Ω and may cause instability. Use low-ESR tantalum (10–100µF, 0.15–20Ω ESR) or add a 1Ω series resistor to ceramic caps to meet stability requirements.
Is AP1115BY28L-13 pin-compatible with other SOT89-3 LDOs like AP2112 or MIC5205?
No - AP1115BY28L-13 uses Pin 1 = Adj(GND), Pin 2 = VIN, Pin 3 = VOUT (B-version). AP2112 and MIC5205 follow different pinouts (e.g., VIN-GND-VOUT or VIN-VOUT-GND), making direct replacement impossible without PCB redesign.
Does AP1115BY28L-13 support adjustable output via external resistors?
No - the "Y28" suffix denotes fixed 2.8V output. Only the AP1115A-ADJ variant (no voltage code) supports adjustable operation using external R1/R2 resistors between VOUT, Adj, and GND. The BY28 version has internal resistor network permanently set to 2.8V.
AP1115BY28L-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):
- 2.8V
- 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
AP1115BY28L-13 FAQ
1.How can I place an order for AP1115BY28L-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1115BY28L-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 AP1115BY28L-13 reliable?
The price and inventory of AP1115BY28L-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1115BY28L-13 is usually 5 days.
3.What payment methods are accepted for AP1115BY28L-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1115BY28L-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1115BY28L-13?
AP1115BY28L-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1115BY28L-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 AP1115BY28L-13?
For technical support, including AP1115BY28L-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1115BY28L-13 requirements.
6.How does Aetrix verify that AP1115BY28L-13 is sourced from the original manufacturer or authorized distributors?
All AP1115BY28L-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 AP1115BY28L-13 meets industry standards.
7.What is the process for return or replacement of AP1115BY28L-13?
All AP1115BY28L-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1115BY28L-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 AP1115BY28L-13 part is unused and in its original packaging.
Return procedure for AP1115BY28L-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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