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Diodes Incorporated AP1117E18L-13
- Part No.:
- AP1117E18L-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
AP1117E18L-13.pdf
- Description:
- IC REG LINEAR 1.8V 1A SOT223
- Quantity:
- Payment:
- Shipping:
Inventory:4,836
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Product details
Overview
AP1117E18L-13 from Diodes Incorporated is a 1.8V fixed-output, 1A low-dropout linear regulator in SOT223 package, designed for stable voltage regulation in space-constrained applications requiring precise 1.8V supply-such as FPGA I/O banks, DDR memory termination, and low-power microcontroller cores. It guarantees ≤1.4V dropout at full 1A load, operates from 3.3V to 12V input, and features built-in thermal shutdown and current limiting.
For engineers reviewing the AP1117E18L-13 datasheet, AP1117E18L-13 pinout, AP1117E18L-13 application, or AP1117E18L-13 equivalent, this page delivers verified electrical parameters, validated SOT223 terminal mapping, real-world use cases in embedded power rails, and direct alternative comparisons for drop-in replacement evaluation.
Technical Context
The AP1117E18L-13 implements a bandgap-referenced error amplifier driving a PNP pass transistor, enabling fast transient response and stable operation with ceramic output capacitors ≥4.7µF (X7R, ESR ≤0.5Ω). Its internal 1.25V reference and fixed resistor network set VOUT = 1.8V with ±2% tolerance over temperature and load.
Thermal protection activates at ~150°C junction temperature, cycling output off/on during overload; junction-to-ambient thermal resistance is 107°C/W on standard 2oz FR-4 with 5mm×5mm copper pad. Input must exceed VOUT by ≥1.3V for regulation, and minimum load current is 5mA to maintain stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.800V ±2% (1.764–1.836V) at 10mA, ensuring compatibility with 1.8V logic families like LVCMOS and DDR2/3 I/O |
| Max Dropout Voltage | 1.4V at 1A load (ΔVOUT = 1% of nominal), enabling regulation from 3.2V input-critical for battery-powered 3.3V→1.8V conversion |
| Output Current | 1A continuous, with internal current limiting protecting against short-circuit faults without external components |
| Line Regulation | ≤0.2% over VIN = VOUT+1.5V to 12V, minimizing output drift during input rail variation (e.g., unregulated adapter ripple) |
| Load Regulation | ≤18mV from 0–1A load (at VIN = 3.3V), maintaining tight voltage control across dynamic processor core loads |
| Thermal Shutdown | Activates at ~150°C junction temperature, automatically disabling output to prevent permanent damage during sustained overload |
| Ripple Rejection | 60–70dB at 180Hz, suppressing switching noise from upstream DC/DC converters feeding the LDO input |
Pinout & Package
SOT223 package: surface-mount, 3-pin, thermally enhanced plastic case with exposed tab electrically connected to VOUT for improved heat dissipation. Tab soldering to PCB copper pour is required for rated 1A performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Adj/GND) | Reference node / Ground return | Internally tied to GND for fixed 1.8V mode; serves as feedback divider node only in adjustable variants-no external connection needed here |
| 2 (VOUT) | Regulated output | Delivers 1.8V to load; tab is electrically connected to this pin-must be soldered to ≥4cm² copper area for thermal management |
| 3 (VIN) | Unregulated input | Accepts 3.3–12V input; requires ≥4.7µF low-ESR capacitor (ceramic or tantalum) within 10mm trace length for stability |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout operation | 1.4V max at 1A enables efficient 1.8V generation from 3.3V rails-reducing power loss vs. legacy 2.0V-drop LDOs |
| Fast transient response | Stabilizes within <20µs after 100mA–1A load step, preventing brownout in FPGA I/O during burst data transfers |
| MLCC-compatible stability | Stable with ≥4.7µF X7R ceramic capacitors (not Y5V), eliminating need for bulkier tantalum or aluminum electrolytics |
| Integrated protection | Current limiting + thermal shutdown eliminate need for external foldback or thermal sensors in compact designs |
| Lead-free & green packaging | SOT223 package meets RoHS 2011/65/EU and halogen-free standards (<900ppm Br/Cl, <1000ppm Sb), supporting eco-compliant manufacturing |
Applications
| DDR Memory Termination | FPGA Core Power |
|---|---|
|
Use Scenario: Supplying VTT termination voltage for DDR2/DDR3 memory buses in embedded controllers. IC Role / Device Role / Timing Role: Provides low-noise, tightly regulated 1.8V VTT rail synchronized to memory clock domain. Use Value: Maintains signal integrity under fast load transients (≤18mV droop), meeting JEDEC DDR timing margin requirements. |
Use Scenario: Powering FPGA configurable logic blocks (CLBs) and I/O banks requiring clean 1.8V supply. IC Role / Device Role / Timing Role: Delivers stable core voltage independent of upstream DC/DC ripple, enabling reliable configuration and timing closure. Use Value: 60–70dB ripple rejection suppresses switching noise from PMIC sources, reducing bit error rates in high-speed SerDes links. |
| Industrial Sensor Interface | USB Peripheral Power |
|
Use Scenario: Regulating 1.8V supply for precision ADCs and digital sensors in factory automation nodes. IC Role / Device Role / Timing Role: Acts as post-regulator for isolated 3.3V supplies, rejecting common-mode noise from 24V field wiring. Use Value: ≤0.5% temperature stability ensures consistent sensor gain calibration across –20°C to +85°C operating range. |
Use Scenario: Generating 1.8V for USB 2.0 PHY logic and hub controller I/O in portable docking stations. IC Role / Device Role / Timing Role: Supplies low-noise power to USB transceivers, minimizing jitter on D+/D– differential pairs. Use Value: Fast transient response prevents USB enumeration failures during plug-in events with simultaneous bus enumeration and charging. |
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 |
|---|---|---|---|
| AP1117E18G-13 | Same electrical specs, but "Green" (halogen/antimony-free) variant with identical SOT223 package and 2500/reel tape-and-reel packaging | No functional difference; selected when RoHS-compliant material declarations require explicit halogen-free certification | Choose for strict environmental compliance programs where Br/Cl/Sb ppm limits are audited (e.g., automotive Tier 1 BOMs) |
| TLV1117-18CDCYR | TI part with 1.8V fixed output, 800mA rating, 1.2V dropout (typ), and different pinout (SOT-223 but pin 1 = GND, pin 2 = VOUT, pin 3 = VIN) | Lower current capability and non-pin-compatible layout requires PCB redesign; higher PSRR (75dB) but slower transient response | Consider only if existing design uses TI's footprint or requires higher PSRR at cost of reduced output current and board rework |
Compared with AP1117E18L-13, AP1117E18G-13 offers identical performance with stricter halogen-free compliance, while TLV1117-18CDCYR trades 200mA current headroom and pin compatibility for marginally better noise rejection-making the Diodes part optimal for cost-sensitive, high-current 1.8V rail applications needing drop-in fit.
Availability
AP1117E18L-13 is available at Aetrix Electronics and suitable for industrial sensor nodes, USB peripheral power rails, and DDR memory termination circuits requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for AP1117E18L-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, computing, and consumer markets.
The AP1117 series targets cost-effective, thermally robust linear regulation in space-constrained embedded systems-designed specifically for replacing legacy 1117 regulators with tighter dropout, improved thermal behavior, and MLCC compatibility.
FAQ
Is AP1117E18L-13 pin-compatible with standard LM1117-1.8 variants?
Yes-AP1117E18L-13 uses the same SOT223 pinout (VIN–VOUT–GND/Adj) and footprint as LM1117-1.8, enabling direct PCB replacement. However, its lower dropout (1.4V vs. 1.2V typ for LM1117) and improved thermal shutdown threshold (+150°C vs. +160°C) require verification of input headroom and thermal margin in legacy designs.
What output capacitor is required for stable operation?
A minimum 4.7µF ceramic capacitor (X7R dielectric, ESR ≤0.5Ω) placed within 10mm of the device is required. Aluminum electrolytic capacitors are acceptable only if ≥47µF and paired with a 1µF MLCC in parallel; Y5V dielectrics must be avoided due to capacitance loss under bias.
Does AP1117E18L-13 support operation below 0°C?
Yes-the industrial-grade AP1117I variant supports –40°C to +125°C, but AP1117E18L-13 is rated for 0°C to +125°C. For sub-zero operation, Diodes recommends using 22µF input/output capacitors (per Note 11) and verifying thermal performance with derated load current due to increased ESR at low temperature.
Can AP1117E18L-13 be used in battery-powered applications?
Yes-it draws only 5–10mA quiescent current and maintains regulation down to 3.2V input, making it suitable for single-cell Li-ion (3.0–4.2V) or dual-cell alkaline (2.4–3.2V) systems when paired with a boost converter or higher-voltage battery stack. Dropout voltage determines minimum usable input voltage under load.
AP1117E18L-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- 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-223-3
AP1117E18L-13 FAQ
1.How can I place an order for AP1117E18L-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1117E18L-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 AP1117E18L-13 reliable?
The price and inventory of AP1117E18L-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1117E18L-13 is usually 5 days.
3.What payment methods are accepted for AP1117E18L-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1117E18L-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1117E18L-13?
AP1117E18L-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1117E18L-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 AP1117E18L-13?
For technical support, including AP1117E18L-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1117E18L-13 requirements.
6.How does Aetrix verify that AP1117E18L-13 is sourced from the original manufacturer or authorized distributors?
All AP1117E18L-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 AP1117E18L-13 meets industry standards.
7.What is the process for return or replacement of AP1117E18L-13?
All AP1117E18L-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1117E18L-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 AP1117E18L-13 part is unused and in its original packaging.
Return procedure for AP1117E18L-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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