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Diodes Incorporated AP1117Y18G-13
- Part No.:
- AP1117Y18G-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-243AA
- Datasheet:
-
AP1117Y18G-13.pdf
- Description:
- IC REG LINEAR 1.8V 1A SOT89-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,331
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Product details
Overview
AP1117Y18G-13 from Diodes Incorporated is a 1A low-dropout linear voltage regulator in fixed 1.8V output mode, housed in SOT89-3 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 - designed for high-speed bus termination and low-current logic supplies in PC peripherals and communication equipment.
For engineers reviewing the AP1117Y18G-13 datasheet, AP1117Y18G-13 pinout, AP1117Y18G-13 application, or AP1117Y18G-13 equivalent, this page provides verified technical context, real-world design meaning of specifications, validated pin functions, application-specific implementation guidance, and confirmed alternative options for 1.8V LDO replacement in industrial and commercial embedded systems.
Technical Context
The AP1117Y18G-13 implements an internal bandgap reference (1.25V nominal), error amplifier, and NPN pass transistor to regulate output voltage with fast transient response and <1% load regulation over 0–1A. Its dropout behavior is characterized at 1.3V typical (1.4V max) at 1A across 0°C to +125°C junction temperature.
It requires minimum 4.7µF ceramic or tantalum output capacitance (ESR ≤0.5Ω) placed within 10mm of the device for stability, and supports MLCCs - unlike legacy 1117 variants - enabling compact, low-ESR decoupling in space-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.800V ±2% at 10mA, ensuring precise core logic rail for 1.8V FPGA I/O or microcontroller peripherals. |
| Dropout Voltage | 1.3V typical (1.4V max) at 1A load, enabling regulation from 3.1V input - critical for battery-backed or multi-rail systems with tight headroom. |
| Output Current | 1A continuous, supporting single-rail power for mid-complexity digital subsystems without external boost circuitry. |
| Line Regulation | 0.2% max over 1.5V–12V input differential, minimizing output drift during input ripple or brown-out conditions. |
| Load Regulation | 15mV max (1.8V version) over 0–1A, maintaining voltage accuracy under dynamic CPU or memory load transitions. |
| Junction Temp Range | 0°C to +125°C, qualifying for commercial-grade industrial control panels and network interface cards without derating. |
| Thermal Shutdown | Activates at ~150°C junction, protecting PCB traces and adjacent components during sustained overload or poor heatsinking. |
Pinout & Package
SOT89-3 package with exposed thermal tab connected to VOUT for enhanced heat dissipation; footprint compatible with standard SOT-89 land pattern (X1=1.733mm, Y1=4.600mm per Diodes AP02001).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Adj (GND) | Ground reference terminal; internally tied to GND in fixed-mode - must be connected directly to system ground plane with minimal impedance. |
| 2 | VIN | Input supply node; requires ≥4.7µF low-ESR capacitor within 10mm to prevent sag during 1A transients - input must exceed VOUT by ≥1.3V to maintain regulation. |
| 3 | VOUT | Regulated 1.8V output; thermal tab is electrically connected to this pin - PCB copper pour must be isolated from other nets and sized per θJA=164°C/W spec. |
Key Features
| Feature | Design Value |
|---|---|
| Fast Transient Response | Sub-20µs recovery from 100mA–1A load steps, preserving signal integrity in burst-mode digital interfaces. |
| MLCC-Compatible Stability | Stable with X7R ceramic capacitors ≥4.7µF (ESR ≤0.5Ω), eliminating need for bulk tantalum and reducing BOM cost/size. |
| Lead-Free & Halogen-Free | RoHS-compliant (no Br/Sb >900ppm), meeting IPC-1752A environmental requirements for global OEM shipments. |
| Integrated Protection | Current limiting (1.1A min) and thermal shutdown prevent latch-up or catastrophic failure during short-circuit or ambient overheating. |
| Low Quiescent Current | ~5–10mA minimum load requirement enables use in always-on standby circuits without excessive idle power loss. |
Applications
| PC Peripheral Power | Communication Interface Supply |
|---|---|
Use Scenario: Providing clean 1.8V rail to USB 3.0 controller PHY and PCIe endpoint logic on add-in cards. IC Role / Device Role / Timing Role: Fixed-output LDO delivering regulated bias for high-speed SerDes receivers and transmitter drivers. Use Value: 1.4V dropout allows direct derivation from 3.3V auxiliary rail, reducing need for intermediate buck conversion and associated EMI. |
Use Scenario: Powering RS-485 transceiver I/O stages and CAN FD controller logic in industrial gateways. IC Role / Device Role / Timing Role: Low-noise voltage source stabilizing data-dependent supply currents during differential bus arbitration. Use Value: 70dB ripple rejection at 180Hz suppresses switching noise from adjacent DC-DC converters, preventing bit errors in long-haul serial links. |
| VGA Card Core Logic | Consumer Equipment Memory Interface |
Use Scenario: Supplying 1.8V to GPU memory controller and display timing generator in legacy graphics modules. IC Role / Device Role / Timing Role: Primary voltage regulator for timing-critical pixel processing blocks requiring sub-1% voltage tolerance. Use Value: 15mV load regulation ensures consistent setup/hold margins across full GPU load spectrum, avoiding frame tearing or sync loss. |
Use Scenario: Powering LPDDR2 I/O buffers and command decoder in smart TV mainboards operating at ambient -10°C to +70°C. IC Role / Device Role / Timing Role: Temperature-stable LDO maintaining 1.8V compliance across extended thermal cycles. Use Value: Guaranteed operation to +125°C junction enables reliable function in thermally dense consumer enclosures without forced airflow. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed 1.8V LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LD1117S18TR | 1.2A rated, 1.1V dropout typ at 800mA, TO220/SOT223 only - no SOT89-3 option. | Larger thermal mass required; unsuitable for ultra-thin PC peripheral PCBs with height constraints. | Select when higher current headroom or TO220 heatsink compatibility is prioritized over board area. |
| TLV1117-18CDCYR | 800mA rated, 1.2V dropout typ at 1A, SOT223 only - lower current capability and different package footprint. | Requires PCB redesign for SOT223 pad layout; not drop-in for existing SOT89-3 layouts. | Choose when lower quiescent current (5mA vs 10mA) and TI's qualification for automotive temp range (-40°C to +125°C) are mandatory. |
Compared with LD1117S18TR and TLV1117-18CDCYR, AP1117Y18G-13 uniquely balances 1A output, SOT89-3 form factor, and commercial-temp reliability - making it optimal for cost-sensitive, space-constrained PC and communication boards where thermal management relies on PCB copper rather than discrete heatsinks.
Availability
AP1117Y18G-13 is available at Aetrix Electronics and suitable for PC peripheral power, communication interface supply, VGA card core logic, and consumer equipment memory interface applications requiring stable component supply with lead-free compliance and SOT89-3 mounting flexibility.
Supply support for AP1117Y18G-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, with emphasis on power management, signal integrity, and protection devices.
The AP1117 series belongs to Diodes' precision linear regulator product line, engineered specifically for high-reliability, low-noise, and low-dropout operation in computing, communications, and consumer electronics - addressing demand for compact, thermally robust, and RoHS-compliant voltage regulation.
FAQ
What is the minimum input voltage required for AP1117Y18G-13 to regulate at full 1A load?
The device requires VIN ≥ VOUT + dropout voltage. With 1.8V output and maximum 1.4V dropout at 1A, minimum input is 3.2V. However, datasheet specifies 3.3V ≤ VIN ≤ 12V for 1.8V version testing - so 3.3V is the practical minimum to ensure specification compliance across temperature and process variation.
Can AP1117Y18G-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 guaranteed stability. Using smaller MLCCs risks oscillation due to insufficient phase margin - even if X7R dielectric is selected. A 4.7µF 0805 X7R capacitor is the smallest validated solution.
Is the thermal tab of AP1117Y18G-13 electrically isolated?
No. The thermal tab is internally connected to the VOUT pin, as confirmed in the Pin Assignments diagram and "Tab is VOUT" note. PCB copper pour for thermal relief must be routed exclusively to the 1.8V net and isolated from all other voltages and grounds to prevent short circuits.
Does AP1117Y18G-13 support operation below 0°C ambient?
Yes, but with derating. The commercial-grade part (0°C to +125°C junction) is rated for ambient down to 0°C. For sub-zero operation, Diodes recommends 22µF input/output capacitance (per Note 11) and confirms functionality - however, junction temperature must remain ≥0°C, requiring careful thermal design in cold environments.
AP1117Y18G-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
AP1117Y18G-13 FAQ
1.How can I place an order for AP1117Y18G-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1117Y18G-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 AP1117Y18G-13 reliable?
The price and inventory of AP1117Y18G-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1117Y18G-13 is usually 5 days.
3.What payment methods are accepted for AP1117Y18G-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1117Y18G-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1117Y18G-13?
AP1117Y18G-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1117Y18G-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 AP1117Y18G-13?
For technical support, including AP1117Y18G-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1117Y18G-13 requirements.
6.How does Aetrix verify that AP1117Y18G-13 is sourced from the original manufacturer or authorized distributors?
All AP1117Y18G-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 AP1117Y18G-13 meets industry standards.
7.What is the process for return or replacement of AP1117Y18G-13?
All AP1117Y18G-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1117Y18G-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 AP1117Y18G-13 part is unused and in its original packaging.
Return procedure for AP1117Y18G-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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