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Diodes Incorporated AP1117Y18L-13
- Part No.:
- AP1117Y18L-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-243AA
- Datasheet:
-
AP1117Y18L-13.pdf
- Description:
- IC REG LINEAR 1.8V 1A SOT89-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,653
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Product details
Overview
AP1117Y18L-13 from Diodes Incorporated is a 1.8V fixed-output, 1A low-dropout linear regulator in SOT89-3 package, designed for stable low-voltage supply in space-constrained applications. It delivers ≤1.4V dropout at full load, supports 6.4–18V input, and guarantees ±2% output accuracy over 0°C to +125°C junction temperature. Used in PC peripherals and communication modules requiring clean 1.8V logic rails.
For engineers reviewing the AP1117Y18L-13 datasheet, AP1117Y18L-13 pinout, AP1117Y18L-13 application, or AP1117Y18L-13 equivalent, key selection factors include guaranteed 1.4V max dropout at 1A, thermal shutdown protection, 4.7µF MLCC-compatible output capacitance requirement, and SOT89-3 thermal resistance (θJA = 164°C/W).
Technical Context
The AP1117Y18L-13 integrates a precision 1.25V reference, current-limiting circuitry, and thermal shutdown into a monolithic IC. Its internal architecture uses a PNP pass transistor with feedback control loop optimized for fast transient response and <0.04%/W thermal regulation drift.
It operates exclusively in fixed-mode (1.8V output), eliminating external resistor networks. Input-to-output differential must exceed 1.3V for regulation, and stability requires ESR-controlled output capacitors (0.15–0.5Ω) - compatible with X7R MLCCs but not Y5V dielectrics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.800V ±2% (guaranteed at 10mA, 3.3–12V input; enables direct replacement of 1.8V logic supplies) |
| Max Dropout Voltage | 1.4V at 1A load (allows operation from 3.2V input to sustain 1.8V output under full load) |
| Output Current | 1A continuous (supports high-current digital I/O, memory interfaces, and FPGA core rails) |
| Thermal Shutdown | Activates at ~150°C junction (protects against sustained overload or poor PCB heat sinking) |
| Input Voltage Range | 3.3V to 18V DC (covers wide-input industrial and adapter-fed systems) |
| Load Regulation | ≤18mV (0–1A load step; ensures <0.1% output deviation across full current range) |
| Line Regulation | ≤0.2% (for VIN changes within VOUT+1.5V to 12V; maintains tight voltage under input ripple) |
Pinout & Package
SOT89-3 package with exposed thermal tab connected to VOUT pin; compact 4.5×2.5mm footprint ideal for dense PCB layouts. Tab soldering required for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Adj (GND) | Ground terminal for fixed-mode operation; no external connection needed (internally tied to GND) |
| 2 | VOUT | Regulated 1.8V output; connects to thermal tab - must be soldered to large copper pour for θJA reduction |
| 3 | VIN | Unregulated input (3.3–18V); requires ≥4.7µF low-ESR capacitor placed ≤10mm from pin |
Key Features
| Feature | Design Value |
|---|---|
| Fast transient response | Sub-20µs recovery from 100mA–1A load steps (minimizes voltage dip on processor I/O bursts) |
| Built-in current limiting | 1.1A typical foldback limit (prevents damage during short-circuit without external fusing) |
| No external components required | Fixed 1.8V output eliminates R1/R2 divider - reduces BOM count and layout area |
| MLCC-compatible stability | Stable with 4.7µF X7R ceramic (ESR 0.15–0.5Ω); avoids bulkier tantalum or aluminum electrolytics |
| Lead-free & halogen-free | RoHS-compliant SOT89-3 package with <900ppm Br/Cl and <1000ppm Sb ("Green" compound) |
Applications
| PC Peripheral Power | Communication Module Supply |
|---|---|
Use Scenario: Powering USB 3.0 controller ICs and PCIe endpoint logic on add-in cards. IC Role / Device Role / Timing Role: Primary 1.8V LDO supplying core logic and SerDes PHY interface. Use Value: Low dropout enables use of 3.3V rail as input source; fast transient response prevents link training failures during hot-plug events. |
Use Scenario: Providing regulated 1.8V to baseband processors and RF transceivers in cellular IoT modules. IC Role / Device Role / Timing Role: Point-of-load regulator for digital subsystems requiring noise-immune supply. Use Value: 70dB ripple rejection at 180Hz suppresses switching noise from upstream DC/DC converters feeding the module. |
| VGA Card Core Logic | Consumer Equipment Interface |
Use Scenario: Delivering stable 1.8V to GPU memory controllers and display interface serializers. IC Role / Device Role / Timing Role: Dedicated LDO for timing-critical pixel data paths and clock domain buffers. Use Value: 0.5% temperature stability ensures consistent signal integrity across -20°C to +70°C ambient operating range. |
Use Scenario: Powering HDMI transmitter ICs and audio codec digital cores in smart TVs and streaming boxes. IC Role / Device Role / Timing Role: Fixed-output regulator for low-noise digital supply domains. Use Value: Built-in thermal shutdown prevents latch-up during enclosure overheating, improving field reliability. |
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 (1.5V typ at 1A), TO263-3 package, 0.01%/°C tempco | Requires larger board area; better for high-ambient-temp industrial environments | Choose when thermal resistance <60°C/W is mandatory and PCB space allows TO263 |
| LD1117S18TR | Lower max current (800mA), SOT223 package, 1.2V ref tolerance ±1% | Insufficient for 1A loads; suitable only for lower-power peripherals | Accept only if load current stays below 750mA and existing SOT223 footprint reuse is critical |
Compared with MIC29302WU-1.8 and LD1117S18TR, AP1117Y18L-13 offers superior dropout performance in the smallest footprint (SOT89-3), making it optimal for cost-sensitive, space-constrained consumer designs where 1A capability and 1.8V accuracy are non-negotiable.
Availability
AP1117Y18L-13 is available at Aetrix Electronics and suitable for PC peripheral power, communication module supply, and consumer equipment interface applications requiring stable component supply, RoHS compliance, and lead-free manufacturing support.
Supply support for AP1117Y18L-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 company specializing in discrete, analog, and mixed-signal solutions, with design centers across Asia, Europe, and the US.
The AP1117 series belongs to Diodes' precision linear regulator product line, engineered for high-reliability, low-noise power delivery in computing, communications, and consumer electronics.
FAQ
What is the minimum input voltage required for AP1117Y18L-13 to regulate at 1.8V?
The device requires VIN ≥ VOUT + 1.3V to maintain regulation, so minimum input is 3.1V. At full 1A load, dropout rises to 1.4V, meaning 3.2V input is recommended for margin. Below this threshold, output collapses linearly with input.
Can AP1117Y18L-13 be used with ceramic capacitors smaller than 4.7µF?
No - the datasheet mandates ≥4.7µF output capacitance with ESR between 0.15Ω and 0.5Ω for stability. Using smaller values risks oscillation; X7R MLCCs meeting this ESR range are acceptable, but Y5V types are prohibited due to ESR drift.
Is thermal pad soldering required for AP1117Y18L-13 in SOT89-3?
Yes - the exposed thermal tab is electrically connected to VOUT and is the primary heat path. Omitting solder paste or insufficient pad area degrades θJA from 164°C/W to >200°C/W, risking thermal shutdown under 500mA load at +70°C ambient.
Does AP1117Y18L-13 support reverse-polarity input protection?
No - the device lacks internal reverse-battery protection. Applying negative voltage to VIN can damage the internal pass transistor. An external series Schottky diode (e.g., 1N5819) is required if input polarity reversal is possible in the system.
AP1117Y18L-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):
- 1.4V @ 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:
- SOT-89-3
AP1117Y18L-13 FAQ
1.How can I place an order for AP1117Y18L-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1117Y18L-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 AP1117Y18L-13 reliable?
The price and inventory of AP1117Y18L-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1117Y18L-13 is usually 5 days.
3.What payment methods are accepted for AP1117Y18L-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1117Y18L-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1117Y18L-13?
AP1117Y18L-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1117Y18L-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 AP1117Y18L-13?
For technical support, including AP1117Y18L-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1117Y18L-13 requirements.
6.How does Aetrix verify that AP1117Y18L-13 is sourced from the original manufacturer or authorized distributors?
All AP1117Y18L-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 AP1117Y18L-13 meets industry standards.
7.What is the process for return or replacement of AP1117Y18L-13?
All AP1117Y18L-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1117Y18L-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 AP1117Y18L-13 part is unused and in its original packaging.
Return procedure for AP1117Y18L-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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