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Diodes Incorporated AP1115BY18G-13
- Part No.:
- AP1115BY18G-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-243AA
- Datasheet:
-
AP1115BY18G-13.pdf
- Description:
- IC REG LINEAR 1.8V 600MA SOT89-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,288
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Product details
Overview
AP1115BY18G-13 from Diodes Incorporated is a 0.6A low-dropout positive voltage regulator in fixed 1.8V output mode, housed in a SOT89-3L package with lead-free and halogen-free "Green" construction. It delivers stable 1.8V at up to 600mA with ≤1.3V dropout at full load, supports input voltages up to 18V, and is optimized for low-voltage IC supply in VGA cards and high-speed bus termination.
For engineers reviewing the AP1115BY18G-13 datasheet, AP1115BY18G-13 pinout, AP1115BY18G-13 application, or AP1115BY18G-13 equivalent, key selection criteria include guaranteed 1.8V ±1.2% output accuracy at 10mA, 26mV load regulation (0–600mA), 70dB ripple rejection at 120Hz, thermal shutdown protection, and SOT89-3L pin configuration variant B (Adj/GND–VIN–VOUT).
Technical Context
The AP1115BY18G-13 operates in fixed-output mode with internal reference and error amplifier driving a PNP pass transistor. Its control loop ensures fast transient response-under 20µs line/load step recovery-and maintains regulation across 0°C to +125°C junction temperature with <0.04%/W thermal drift.
Designed for minimal external components, it requires only two 100µF capacitors (ESR 0.15–20Ω) on VIN and VOUT for stability. Dropout behavior is characterized at 1% VOUT deviation, and power dissipation is internally limited by thermal shutdown triggered at +150°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.800V ±1.2% at 10mA; ensures logic-level compatibility with 1.8V I/O standards (e.g., DDR2/3 address/control lines) |
| Max Dropout Voltage | 1.3V at 600mA; enables regulation from 3.1V input, supporting single-cell LiFePO₄ or dual-cell NiMH supplies |
| Load Regulation | 15mV (0–600mA); maintains output within ±0.83% across full load, critical for noise-sensitive analog subsystems |
| Ripple Rejection | 70dB at 120Hz with 25µF tantalum; suppresses switching noise from upstream DC/DC converters feeding the LDO |
| Thermal Resistance | θJA = 164°C/W (FR-4, 2oz Cu); limits max ambient to +65°C at 600mA with no heatsink |
| Quiescent Current | 5–10mA minimum load requirement; prevents regulation loss during ultra-low-power standby modes |
| Package | SOT89-3L (Pinout B: Pin1=Adj/GND, Pin2=VIN, Pin3=VOUT); exposes tab to VIN for enhanced thermal conduction to PCB copper |
Pinout & Package
SOT89-3L package with exposed tab thermally connected to VIN (Pin 2) per variant B configuration; 3-pin surface-mount outline measuring 4.5mm × 2.45mm × 1.5mm, RoHS-compliant and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Adj/GND) | Ground reference / Adjunction node | Internally tied to GND in fixed-mode; serves as feedback reference point-must be connected directly to system ground plane |
| Pin 2 (VIN) | Regulator input | Accepts 3.3V–18V DC input; tab is electrically connected to this pin for improved thermal transfer to PCB copper pour |
| Pin 3 (VOUT) | Regulated output | Delivers 1.8V ±1.2%; requires ≥10µF capacitor (0.15–20Ω ESR) to ground for loop stability and transient suppression |
Key Features
| Feature | Design Value |
|---|---|
| Fast transient response | Sub-20µs recovery from 50% load step; preserves signal integrity in burst-mode digital loads (e.g., GPU memory interface) |
| Built-in thermal shutdown | Activates at +150°C junction temperature; prevents permanent damage during sustained overload or poor PCB thermal design |
| Output current limiting | Guaranteed 0.7A current limit (typical); protects downstream circuitry during short-circuit or overcurrent events |
| High ripple rejection | 70dB @ 120Hz; enables clean 1.8V rail generation from noisy switcher outputs without additional LC filtering |
| Green compound packaging | Halogen- and antimony-free molding compound (<900ppm Br, <900ppm Cl, <1000ppm Sb); meets IPC-1752A environmental compliance requirements |
Applications
| VGA Graphics Card Power | PCI Express Bus Termination |
|---|---|
|
Use Scenario: Providing dedicated 1.8V supply to GPU core I/O buffers and TMDS transmitter circuitry on discrete graphics cards. IC Role / Device Role / Timing Role: Fixed-output LDO delivering low-noise, tightly regulated 1.8V rail independent of main GPU VRM. Use Value: Enables stable TMDS signaling at 165MHz+ by suppressing supply-induced jitter; 15mV load regulation prevents timing margin erosion under dynamic pixel load. |
Use Scenario: Supplying 1.8V termination voltage for PCIe Gen2/Gen3 receiver inputs on motherboard add-in cards. IC Role / Device Role / Timing Role: Low-dropout regulator maintaining precise 1.8V reference for AC-coupled differential receivers. Use Value: 70dB ripple rejection eliminates crosstalk-induced bit errors; 1.3V dropout allows use of shared 3.3V intermediate rail, reducing BOM count. |
| Low-Power FPGA I/O Bank | Industrial Camera Sensor Interface |
|
Use Scenario: Powering 1.8V I/O banks of Xilinx Spartan-6 or Intel MAX 10 FPGAs in embedded vision controllers. IC Role / Device Role / Timing Role: Local point-of-load regulator decoupling FPGA I/O from system-wide 3.3V distribution network. Use Value: Fast transient response prevents setup/hold violations during simultaneous I/O switching; thermal shutdown prevents latch-up during FPGA configuration bursts. |
Use Scenario: Supplying 1.8V to CMOS image sensor parallel data bus drivers and column ADC reference circuits. IC Role / Device Role / Timing Role: Ultra-low-noise analog supply regulator isolating sensor analog front-end from digital switching noise. Use Value: 0.04%/W thermal regulation minimizes dark current drift across ambient temperature swings; 10mA min load ensures regulation during sensor idle states. |
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-1802E/TT | 250mA output, 6µA quiescent current, 170mV dropout at 250mA | Lower current capacity; suited for always-on sensor nodes, not VGA card I/O rails | Select when ultra-low IQ and <250mA load dominate; not suitable for 600mA peak loads |
| TPS799185DRVR | 400mA output, 1.5% initial accuracy, 0.22V dropout at 200mA, enable pin included | Lacks thermal shutdown flag; requires external enable sequencing in multi-rail systems | Choose for battery-powered portable devices needing enable control and tighter accuracy, but verify thermal derating at 600mA |
Compared with MCP1700T-1802E/TT and TPS799185DRVR, AP1115BY18G-13 uniquely supports 600mA continuous load with integrated thermal shutdown and 1.3V dropout-making it irreplaceable in legacy VGA and high-current industrial interface designs where higher current and robust protection are mandatory.
Availability
AP1115BY18G-13 is available at Aetrix Electronics and suitable for VGA graphics card manufacturing, PCIe add-in card production, and industrial camera module assembly requiring stable component supply despite end-of-life status.
Supply support for AP1115BY18G-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 belongs to Diodes' legacy LDO regulator product line, engineered specifically for cost-sensitive, high-volume PC peripheral and graphics subsystem applications demanding robust thermal performance and fixed-output simplicity.
FAQ
Is AP1115BY18G-13 still in production?
No-AP1115BY18G-13 is officially obsolete and discontinued by Diodes Incorporated as of April 2016. Aetrix Electronics maintains limited legacy stock with full traceability and offers lifecycle coordination support for ongoing production runs requiring last-time buys.
What is the difference between AP1115A and AP1115B pinouts?
AP1115B (used in AP1115BY18G-13) has Pin 1 = Adj/GND, Pin 2 = VIN, Pin 3 = VOUT, with the exposed tab connected to VIN. AP1115A reverses Pins 1 and 3 (VOUT–Adj/GND–VIN), and its tab connects to Adj/GND-requiring different PCB layout and thermal design.
Can AP1115BY18G-13 be used with ceramic output capacitors?
Yes, but only if ESR is ≥0.15Ω-standard X7R ceramics typically fall below this threshold. A 1–2Ω damping resistor in series with the capacitor or use of POSCAP/polymer tantalum (ESR 0.15–20Ω) is required to ensure loop stability per datasheet Section 4.
Does AP1115BY18G-13 support adjustable output via external resistors?
No-AP1115BY18G-13 is factory-configured for fixed 1.8V output. Only the AP1115-ADJ variant (marked "JO" or "JU") supports external resistor programming; the "Y18" suffix explicitly denotes fixed 1.8V mode with internal feedback divider.
AP1115BY18G-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):
- 1.8V
- 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
AP1115BY18G-13 FAQ
1.How can I place an order for AP1115BY18G-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1115BY18G-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 AP1115BY18G-13 reliable?
The price and inventory of AP1115BY18G-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1115BY18G-13 is usually 5 days.
3.What payment methods are accepted for AP1115BY18G-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1115BY18G-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1115BY18G-13?
AP1115BY18G-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1115BY18G-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 AP1115BY18G-13?
For technical support, including AP1115BY18G-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1115BY18G-13 requirements.
6.How does Aetrix verify that AP1115BY18G-13 is sourced from the original manufacturer or authorized distributors?
All AP1115BY18G-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 AP1115BY18G-13 meets industry standards.
7.What is the process for return or replacement of AP1115BY18G-13?
All AP1115BY18G-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1115BY18G-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 AP1115BY18G-13 part is unused and in its original packaging.
Return procedure for AP1115BY18G-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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