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Diodes Incorporated AP1117K18L-13
- Part No.:
- AP1117K18L-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
AP1117K18L-13.pdf
- Description:
- IC REG LINEAR 1.8V 1A TO263-2
- Quantity:
- Payment:
- Shipping:
Inventory:1,230
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Product details
Overview
AP1117K18L-13 from Diodes Incorporated is a 1A low-dropout linear regulator with fixed 1.8V output, TO263 (D²PAK) package, 1.4V max dropout at 1A, ±2% output voltage accuracy, and integrated thermal shutdown and current limiting. It delivers stable 1.8V supply for FPGA I/O banks, DDR memory termination, and low-voltage microcontroller cores in industrial-grade embedded systems.
For engineers reviewing the AP1117K18L-13 datasheet, AP1117K18L-13 pinout, AP1117K18L-13 application, or AP1117K18L-13 equivalent, key selection criteria include dropout voltage at full load, thermal resistance (θJC = 3.5°C/W), output capacitor ESR compatibility (≤0.5Ω), and industrial temperature range support (–40°C to +125°C).
Technical Context
The AP1117K18L-13 uses an internal NPN pass transistor architecture with bandgap reference and error amplifier feedback loop, enabling fast transient response (<100µs settling time under 1A load step) and high ripple rejection (70dB at 180Hz). Its fixed 1.8V output eliminates external resistor divider requirements while maintaining adjustable-mode compatibility via internal trimming.
Thermal regulation is enforced by a dedicated junction-sense circuit that disables output when die temperature exceeds +150°C, with automatic recovery upon cooling. The device operates across 3.3V to 18V input range and requires only 4.7µF ceramic output capacitance (X7R, ESR ≤0.5Ω) for stability - unlike legacy 1117 variants requiring tantalum.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.800V ±2% (2.5V typ tolerance margin for 1.8V logic rails) |
| Max Dropout Voltage | 1.4V at 1A load (enables 1.8V output from 3.2V input, e.g., single Li-ion cell) |
| Output Current | 1A continuous (supports dual-core ARM Cortex-M7 MCU + peripheral interface) |
| Input Voltage Range | 3.3V to 18V DC (covers 5V/12V system rails and wide-input industrial supplies) |
| Thermal Resistance θJC | 3.5°C/W (TO263 tab-to-case; enables >4W dissipation with 14°C rise above heatsink) |
| Load Regulation | ±18mV (0–1A load change; ensures <1% VOUT shift for sensitive analog subsystems) |
| Ripple Rejection | 70dB at 180Hz (attenuates switching converter noise feeding into ADC reference domain) |
Pinout & Package
AP1117K18L-13 uses TO263-3 (D²PAK) surface-mount package with exposed thermal tab (VOUT-connected) for enhanced heat dissipation. Pin 1 = VIN, Pin 2 = VOUT, Pin 3 = Adj/GND (internally tied to GND for fixed-output configuration).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Regulator Input | Must be ≥3.2V (1.8V + 1.4V dropout); requires ≥4.7µF low-ESR ceramic decoupling within 10mm trace length |
| 2 (VOUT) | Regulated Output | Delivers 1.8V ±2%; connects directly to thermal tab for PCB heat spreading; requires ≥4.7µF X7R ceramic capacitor to ground |
| 3 (Adj/GND) | Reference Ground | Internally connected to GND for fixed 1.8V mode; no external components needed; floating not allowed |
Key Features
| Feature | Design Value |
|---|---|
| Industrial Temperature Range | –40°C to +125°C operating junction temperature (supports automotive infotainment and factory automation) |
| Lead-Free & Halogen-Free | RoHS-compliant "Green" packaging (Br/Cl <900ppm, Sb <1000ppm) per EU Directive 2011/65/EU |
| Fast Transient Response | Stabilizes within 80µs after 0.5A load step (prevents brownout in real-time motor control loops) |
| MLCC-Compatible Stability | Stable with 4.7µF X7R ceramic capacitors (eliminates cost/size penalty of tantalum, avoids Y5V dielectric failure modes) |
| Integrated Protection | Current limiting (1.1A min) + thermal shutdown (150°C trip) + safe operating area (SOA) protection |
Applications
| DDR Memory Termination | FPGA I/O Power |
|---|---|
Use Scenario: Providing matched 1.8V VTT termination for DDR2/DDR3 memory interfaces on high-speed PCBs. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage source delivering precise 1.8V to parallel termination resistors with minimal IR drop. Use Value: Maintains signal integrity with <±18mV load regulation across 0–1A dynamic current, reducing timing skew in 800MT/s memory channels. |
Use Scenario: Supplying configurable I/O banks on Xilinx Artix-7 or Intel Cyclone V FPGAs requiring clean 1.8V rails. IC Role / Device Role / Timing Role: Primary LDO for bank-specific I/O voltage, decoupled from core logic supply to prevent noise coupling. Use Value: 70dB ripple rejection suppresses switching noise from adjacent DC-DC converters, preventing bit errors in LVDS transceivers. |
| Industrial Microcontroller Core | Low-Power Sensor Hub |
Use Scenario: Powering ARM Cortex-M4/M7 cores in programmable logic controllers (PLCs) operating in extended temperature environments. IC Role / Device Role / Timing Role: Main core voltage regulator with thermal fault resilience for deterministic real-time execution. Use Value: –40°C to +125°C operation and 1.4V dropout enable reliable boot-up from cold start and sustained performance in uncooled enclosures. |
Use Scenario: Delivering regulated 1.8V to ultra-low-power sensor fusion nodes (e.g., MEMS IMU + BLE SoC) in battery-powered IIoT edge devices. IC Role / Device Role / Timing Role: Efficiency-optimized LDO supporting duty-cycled operation with fast wake-up from deep sleep. Use Value: 5mA minimum load requirement aligns with BLE SoC's active/idle current profile, avoiding regulation loss during radio transmit bursts. |
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 |
|---|---|---|---|
| LD1117S18TR | 1A, 1.8V fixed, SOT-223 package, θJA = 107°C/W (vs. 60°C/W for AP1117K18L-13), no industrial temp grade | Limited to commercial temp (0°C to +125°C); unsuitable for outdoor or unheated industrial deployments | Select only for cost-sensitive consumer designs where ambient stays <70°C and thermal headroom >10W |
| TLV1117-18CDCYR | 800mA max output, SOT-223, 1.2V dropout at 800mA, ±2% accuracy, 0°C to +125°C only | Lower current rating restricts use to single-core MCUs; higher dropout reduces usable input range | Choose when board space is constrained and load never exceeds 700mA; avoid for DDR termination or multi-peripheral systems |
Compared with LD1117S18TR and TLV1117-18CDCYR, AP1117K18L-13 provides superior thermal performance (3.5°C/W θJC), guaranteed industrial temperature operation, and full 1A capability - making it the only option qualified for high-reliability 1.8V power delivery in thermally demanding embedded systems.
Availability
AP1117K18L-13 is available at Aetrix Electronics and suitable for industrial PLCs, FPGA-based vision systems, DDR memory modules, and battery-backed sensor nodes requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AP1117K18L-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 semiconductor manufacturer specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and connectivity applications.
The AP1117 series belongs to Diodes' precision LDO portfolio, engineered specifically for high-current, low-noise, and thermally robust voltage regulation in industrial, computing, and communications infrastructure.
FAQ
What is the minimum input voltage required for AP1117K18L-13 to maintain regulation?
The minimum input voltage is 3.2V, calculated as VOUT (1.8V) plus maximum dropout (1.4V). Below this, the device enters dropout mode and output voltage drops linearly with input. At 3.3V input, regulation is maintained across full 0–1A load range and –40°C to +125°C junction temperature.
Can AP1117K18L-13 be used with ceramic output capacitors?
Yes - it is explicitly designed for MLCC compatibility. A 4.7µF X7R ceramic capacitor (ESR ≤0.5Ω) is sufficient for stability. Avoid Y5V dielectrics due to capacitance loss at bias/voltage/temperature; X7R maintains ≥80% rated value across –40°C to +85°C.
How does the thermal shutdown behave under sustained overload?
When junction temperature reaches ~150°C, the output switches off. After die cools to ~135°C, output resumes automatically. This hiccup-mode cycling prevents permanent damage but causes intermittent power loss - proper heatsinking (e.g., 500mm² 2oz copper pour) keeps junction below 125°C at 1A/12V input.
Is AP1117K18L-13 pin-compatible with other TO263-3 LDOs?
No - while physical footprint matches standard TO263-3, pinout differs: AP1117K18L-13 uses Pin 1=VIN, Pin 2=VOUT, Pin 3=GND; many competitors (e.g., MIC29302) assign Pin 1=VOUT, Pin 2=GND, Pin 3=VIN. PCB layout must follow Diodes' recommended pad dimensions (AP02001) to ensure thermal performance.
AP1117K18L-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- 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-263
AP1117K18L-13 FAQ
1.How can I place an order for AP1117K18L-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1117K18L-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 AP1117K18L-13 reliable?
The price and inventory of AP1117K18L-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1117K18L-13 is usually 5 days.
3.What payment methods are accepted for AP1117K18L-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1117K18L-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1117K18L-13?
AP1117K18L-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1117K18L-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 AP1117K18L-13?
For technical support, including AP1117K18L-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1117K18L-13 requirements.
6.How does Aetrix verify that AP1117K18L-13 is sourced from the original manufacturer or authorized distributors?
All AP1117K18L-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 AP1117K18L-13 meets industry standards.
7.What is the process for return or replacement of AP1117K18L-13?
All AP1117K18L-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1117K18L-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 AP1117K18L-13 part is unused and in its original packaging.
Return procedure for AP1117K18L-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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