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Diodes Incorporated AP1117D18L-13
- Part No.:
- AP1117D18L-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
AP1117D18L-13.pdf
- Description:
- IC REG LINEAR 1.8V 1A TO252-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,250
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Product details
Overview
AP1117D18L-13 from Diodes Incorporated is a 1A low-dropout linear voltage regulator in fixed 1.8V output mode, housed in a TO252 (DPAK) surface-mount package. It delivers stable 1.8V supply with ≤1.4V dropout at full 1A load, supports 6.4–18V input range, and features built-in thermal shutdown and current limiting. It is used in VGA cards, PC peripherals, and 3.3V/1.8V logic power rails where compact, thermally robust regulation is required.
For engineers reviewing the AP1117D18L-13 datasheet, AP1117D18L-13 pinout, AP1117D18L-13 application, or AP1117D18L-13 equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, application-specific implementation guidance, and confirmed alternative options - all grounded in Diodes' DS31009 Rev. 23 datasheet and official ordering information.
Technical Context
The AP1117D18L-13 implements a bandgap-referenced error amplifier driving an NPN pass transistor, enabling precise 1.8V output regulation across load (0–1A), line (6.4–18V), and temperature (0°C to +125°C) variations. Its internal 1.25V reference and fixed-resistor feedback network eliminate external adjustment components.
Thermal protection activates at ~150°C junction temperature, cycling output off/on during overload; current limiting engages at ≥1.1A. Stability is ensured with ≥4.7µF ceramic or tantalum output capacitors (ESR ≤0.5Ω), and it supports MLCCs without phase-margin degradation - an improvement over legacy 1117 regulators.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.800 V ±2% (1.764–1.836 V) at 10mA, ensuring compatibility with 1.8V core logic I/O standards. |
| Dropout Voltage | 1.4 V max at 1A load, enabling regulation from 3.2V input - critical for battery-powered or multi-rail systems with tight headroom. |
| Output Current | 1 A continuous, sufficient for powering FPGA I/O banks, DDR memory termination, or microcontroller subsystems. |
| Line Regulation | 0.2% max over 1.5V–12V input differential, minimizing output drift during input rail sag or ripple. |
| Load Regulation | 15 mV max (1.8V output) from 0–1A load step, preserving voltage accuracy under dynamic CPU/GPU load transients. |
| Junction Temp Range | 0°C to +125°C, qualifying for commercial-grade embedded applications without industrial-grade cost premium. |
| Thermal Resistance θJA | 73°C/W (TO252 on 2oz FR-4, 5mm×5mm pad), defining minimum PCB copper area needed for 1A continuous operation at TA=25°C. |
Pinout & Package
AP1117D18L-13 uses the TO252-3 (DPAK) package with exposed thermal tab connected to VOUT for enhanced heat dissipation. The device is surface-mount, lead-free, and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input supply connection | Must be ≥3.2V (1.8V + 1.4V dropout); requires ≥4.7µF low-ESR capacitor to ground to prevent input sag during load transients. |
| 2 (VOUT) | Regulated 1.8V output | Connected to thermal tab; requires ≥4.7µF ceramic/tantalum capacitor (ESR ≤0.5Ω) directly at pin for stability and transient response. |
| 3 (Adj/GND) | Ground reference terminal | Fixed-mode only: internally tied to GND; no external connection required - simplifies layout vs. adjustable variants. |
Key Features
| Feature | Design Value |
|---|---|
| 1.4V max dropout at 1A | Enables efficient 1.8V generation from 3.3V or 5V rails, reducing power loss and thermal stress in space-constrained designs. |
| Built-in thermal shutdown | Protects against sustained overload by disabling output above ~150°C junction temperature - eliminates need for external thermal monitoring. |
| Output current limiting | Clamps output at ≥1.1A, preventing damage during short-circuit or inrush events without requiring external foldback circuitry. |
| MLCC-compatible stability | Stable with X7R ceramic capacitors (≥4.7µF), enabling smaller, lower-ESR, higher-reliability output filtering vs. tantalum-only solutions. |
| Lead-free & halogen-free | Meets RoHS 2 and "Green" requirements (<900ppm Br/Cl, <1000ppm Sb), supporting environmental compliance for global OEM shipments. |
Applications
| VGA Graphics Card Power | PC Peripheral Interface |
|---|---|
Use Scenario: Providing clean 1.8V supply to GPU memory interface or display controller I/O buffers on discrete graphics cards. IC Role / Device Role / Timing Role: Fixed-output LDO regulator delivering low-noise, low-ripple DC bias for high-speed parallel bus signaling. Use Value: Maintains signal integrity under 1A dynamic load steps with ≤15mV load regulation, preventing timing violations in 1.8V DDR interfaces. |
Use Scenario: Powering USB hub controllers, SATA bridge ICs, or PCIe switch auxiliary rails in desktop add-in cards. IC Role / Device Role / Timing Role: Primary 1.8V domain regulator for logic-level translation and PHY biasing in high-bandwidth peripheral interconnects. Use Value: Fast transient response and 60–70dB ripple rejection suppress noise coupling from shared 3.3V/5V system rails into sensitive link-layer circuits. |
| Consumer Set-Top Box SoC Core | Industrial HMI Display Controller |
Use Scenario: Supplying 1.8V core voltage to ARM-based media processor I/O domains in streaming devices operating at ambient temperatures up to 70°C. IC Role / Device Role / Timing Role: Secondary regulated rail generator downstream of a buck converter, ensuring stable I/O voltage despite input ripple. Use Value: 0.2% line regulation prevents voltage droop during HDMI hot-plug or IR receiver burst activity, avoiding interface resets. |
Use Scenario: Delivering 1.8V to touch controller ASICs and LCD driver logic in factory-floor HMIs exposed to 0–60°C ambient cycles. IC Role / Device Role / Timing Role: Temperature-stable local regulator for display interface timing circuits requiring consistent voltage across operating range. Use Value: 0.5% temperature stability and −40°C to +125°C qualified variant availability (AP1117ID18G-13) ensure reliable startup and operation in uncontrolled environments. |
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 |
|---|---|---|---|
| MIC29302WU-1.8 | Higher dropout (0.4V typ @ 1.5A), wider input (4–26V), but larger TO263-3 package and higher quiescent current (30mA vs. 10mA). | Better suited for higher-input-voltage industrial systems; less optimal for 3.3V-input space-constrained designs. | Select when input exceeds 18V or thermal margin is abundant; avoid if board area or light-load efficiency is critical. |
| LD1117S18TR | Same 1.8V fixed output and TO252 package, but lower 800mA current rating and 1.2V dropout (typ), with narrower input range (4.75–15V). | Compatible for lower-current peripherals (e.g., audio codecs), but insufficient for full 1A VGA termination loads. | Acceptable for cost-sensitive, lower-power applications; verify load current and input headroom before substitution. |
Compared with MIC29302WU-1.8 and LD1117S18TR, AP1117D18L-13 offers the best balance of 1A capability, 1.4V dropout headroom, TO252 thermal performance, and 6.4–18V input flexibility - making it optimal for mid-power consumer and computing applications where size, efficiency, and reliability intersect.
Availability
AP1117D18L-13 is available at Aetrix Electronics and suitable for VGA graphics cards, PC peripheral interface modules, and consumer set-top box SoC power domains requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for AP1117D18L-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 computing, industrial, and consumer markets.
AP1117D18L-13 belongs to Diodes' AP1117 fixed/adjustable LDO family, designed specifically for low-dropout, high-current regulation in space-constrained PCBs - targeting PC peripherals, graphics subsystems, and embedded logic power rails.
FAQ
What is the minimum input voltage required for AP1117D18L-13 to regulate 1.8V output?
The minimum input voltage is 3.2V, calculated as VOUT + maximum dropout (1.8V + 1.4V). Operation below this threshold results in unregulated output. At 1A load and 25°C, typical dropout is 1.2–1.3V, but design must accommodate worst-case 1.4V across temperature and process variation.
Can AP1117D18L-13 use ceramic capacitors for input and output filtering?
Yes - it is explicitly qualified for MLCCs (X7R dielectric, ≥4.7µF) on both input and output. Ceramic capacitors reduce board area and improve transient response versus tantalum. Avoid Y5V dielectrics due to capacitance loss under DC bias and temperature.
How does thermal shutdown behave during sustained overload?
When junction temperature reaches ~150°C, the regulator disables output and remains off until the die cools to ~135°C, then resumes regulation. This hiccup-mode cycling prevents permanent damage but causes intermittent output - external current limiting or heatsinking is recommended for continuous 1A operation.
Is AP1117D18L-13 pin-compatible with other 1117-family regulators in TO252?
Yes - it shares identical TO252-3 pinout (VIN-VOUT-GND) and footprint with industry-standard 1117 regulators. However, its improved load regulation (15mV vs. typical 25–50mV), lower ESR capacitor support, and tighter thermal resistance require validation of existing PCB thermal design before drop-in replacement.
AP1117D18L-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- 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):
- 1.4V @ 1A
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 10 mA
- Current - Supply (Max):
- -
- PSRR:
- 60dB (180Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- 0°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-252-3
AP1117D18L-13 FAQ
1.How can I place an order for AP1117D18L-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1117D18L-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 AP1117D18L-13 reliable?
The price and inventory of AP1117D18L-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1117D18L-13 is usually 5 days.
3.What payment methods are accepted for AP1117D18L-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1117D18L-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1117D18L-13?
AP1117D18L-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1117D18L-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 AP1117D18L-13?
For technical support, including AP1117D18L-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1117D18L-13 requirements.
6.How does Aetrix verify that AP1117D18L-13 is sourced from the original manufacturer or authorized distributors?
All AP1117D18L-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 AP1117D18L-13 meets industry standards.
7.What is the process for return or replacement of AP1117D18L-13?
All AP1117D18L-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1117D18L-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 AP1117D18L-13 part is unused and in its original packaging.
Return procedure for AP1117D18L-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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