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Diodes Incorporated AP1117DG-13
- Part No.:
- AP1117DG-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
AP1117DG-13.pdf
- Description:
- IC REG LINEAR POS ADJ 1A TO252-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,056
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Product details
Overview
AP1117DG-13 from Diodes Incorporated is a 1A low-dropout linear regulator in TO252 (DPAK) package, configured for fixed 3.3V output. It delivers stable regulation with ≤1.4V dropout at full 1A load, supports 4.8V–12V input range, and integrates thermal shutdown and current limiting. It is used in PC peripherals and communication equipment requiring clean, compact 3.3V supply.
For engineers reviewing the AP1117DG-13 datasheet, AP1117DG-13 pinout, AP1117DG-13 application, or AP1117DG-13 equivalent, this page provides verified technical context, real-world design meaning of specifications, validated pin functions, and confirmed alternative options for 3.3V LDO replacement in industrial-grade embedded power rails.
Technical Context
The AP1117DG-13 implements an adjustable-feedback architecture adapted for fixed 3.3V output via internal resistor divider, eliminating external components. Its control loop maintains regulation across 0°C to +125°C junction temperature with <1% load regulation and 60–70dB ripple rejection at 180Hz.
Thermal protection activates at ~150°C junction temperature, disabling output until die cools; combined with θJA = 73°C/W (TO252, 2oz Cu, 5mm×5mm pad), it enables continuous 1A operation under defined PCB layout conditions. Dropout voltage remains ≤1.3V at 1A and 125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.300 V ±2% (measured at 10mA, 4.8–12V input) |
| Max Output Current | 1 A continuous - sufficient for FPGA I/O banks or USB PHY supplies |
| Dropout Voltage | 1.3 V max at 1A and 125°C - enables regulation from 4.6V input |
| Line Regulation | 0.2% - ensures <6.6 mV output shift over full input range |
| Load Regulation | 26–33 mV (0–1A load step) - meets tight tolerance requirements for logic rails |
| Ripple Rejection | 60–70 dB at 180 Hz - suppresses switching noise from upstream DC/DC converters |
| Thermal Shutdown | Activates at ~150°C junction - protects against sustained overload or poor heatsinking |
Pinout & Package
AP1117DG-13 uses the TO252-3 (DPAK) surface-mount package with exposed thermal tab connected to VOUT. The package measures 6.10 mm × 6.58 mm × 2.29 mm and features RoHS-compliant, halogen-free molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input supply connection | Must be ≥4.6V to sustain 3.3V output at 1A; requires ≥4.7µF low-ESR input capacitor |
| 2 (VOUT) | Regulated output and thermal tab | Tab is electrically tied to VOUT - must be soldered to large copper pour for thermal conduction |
| 3 (Adj/GND) | Feedback reference node | Internally tied to ground for fixed-mode operation; no external components required |
Key Features
| Feature | Design Value |
|---|---|
| 1.4V max dropout at 1A | Enables use with 5V intermediate bus while delivering full 3.3V/1A without headroom penalty |
| Built-in thermal shutdown | Prevents permanent damage during transient overloads or inadequate PCB copper area |
| Fast transient response | Stabilizes within 20 µs after 100mA–1A load step - critical for burst-mode digital loads |
| 4.7µF MLCC-compatible output | Eliminates need for bulky tantalum capacitors; supports X7R ceramic with ESR <0.5Ω |
| Industrial temp range | -40°C to +125°C operation - qualified for automotive infotainment and industrial PLC modules |
Applications
| PC Peripheral Power | Communication Module Supply |
|---|---|
|
Use Scenario: Providing clean 3.3V rail to USB 2.0 hub controller and associated transceivers on add-in cards. IC Role / Device Role / Timing Role: Primary post-regulator converting 5V bus to noise-immune logic supply; handles fast load transients from packet bursts. Use Value: 60–70dB ripple rejection prevents bit errors; 1.3V dropout allows direct 5V-to-3.3V conversion without efficiency loss from extra DC/DC stage. |
Use Scenario: Powering Ethernet PHY ICs and PoE interface controllers in managed switches. IC Role / Device Role / Timing Role: Local LDO for PHY analog/digital domains; decouples noise between MAC and physical layer. Use Value: Load regulation ≤33 mV ensures stable reference for 100BASE-TX timing recovery; thermal shutdown guards against ambient + self-heating in enclosed chassis. |
| VGA Card Core Logic | Industrial Sensor Interface |
|
Use Scenario: Delivering 3.3V to GPU memory I/O buffers and display controller logic on legacy VGA expansion cards. IC Role / Device Role / Timing Role: Fixed-output LDO replacing discrete regulator designs; supplies timing-critical pixel clock circuitry. Use Value: 0.2% line regulation minimizes jitter on 25–135 MHz pixel clocks; TO252 thermal performance sustains 1A peak during screen refresh bursts. |
Use Scenario: Powering 3.3V ADCs, digital isolators, and RS-485 transceivers in factory-floor sensor nodes. IC Role / Device Role / Timing Role: Precision analog-domain regulator; maintains reference stability for 12–16-bit measurement accuracy. Use Value: Temperature coefficient <0.5% ensures <±16.5 mV drift over -40°C to +85°C ambient; industrial-grade qualification supports uncooled enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed 3.3V LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC29302WU-3.3 | Higher dropout (0.4V typ at 1.5A), higher quiescent current (40mA vs. 10mA), TO263 package | Requires ≥3.7V input; better suited for high-current, lower-thermal-density layouts | Select if board has >3.7V available and needs marginally higher current capability |
| LD1117S33TR | Lower max current (800mA), wider dropout (1.2V typ at 800mA), SOT223 package | Limited to sub-1A loads; smaller thermal footprint but less robust under sustained load | Select for space-constrained consumer designs where 800mA suffices and cost is primary |
Compared with MIC29302WU-3.3, AP1117DG-13 offers lower dropout and lower IQ for tighter input headroom and longer battery life; versus LD1117S33TR, it delivers full 1A with superior thermal margin in TO252, making it preferred for industrial ambient and sustained load profiles.
Availability
AP1117DG-13 is available at Aetrix Electronics and suitable for PC peripheral power, communication module supply, and industrial sensor interface applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AP1117DG-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 emphasis on high-reliability power management and signal integrity products.
AP1117DG-13 belongs to Diodes' precision LDO regulator product line, engineered for industrial and computing applications demanding low dropout, thermal robustness, and fixed-voltage simplicity without external feedback components.
FAQ
What is the minimum input voltage required for AP1117DG-13 to regulate 3.3V at 1A?
The AP1117DG-13 requires VIN ≥ VOUT + dropout voltage. At 1A and 125°C, maximum dropout is 1.4V, so minimum input is 4.7V. At room temperature and 1A, typical dropout is 1.2V, allowing stable regulation from 4.5V. Input must remain ≥1.3V above VOUT at all times per datasheet specification.
Can AP1117DG-13 use ceramic output capacitors, and what ESR range is acceptable?
Yes - AP1117DG-13 is explicitly qualified for MLCC output capacitors. A minimum 4.7µF X7R ceramic capacitor with ESR ≤0.5Ω is required. Y5V dielectrics are prohibited due to capacitance drift; aluminum electrolytics require ≥47µF and benefit from parallel 1µF MLCC for high-frequency stability.
How does the TO252 thermal performance of AP1117DG-13 compare to SOT223 variants?
In identical PCB conditions (2oz Cu, 5mm×5mm pad), AP1117DG-13 (TO252) achieves θJA = 73°C/W, while SOT223 versions (e.g., AP1117EG-13) achieve 107°C/W. This 34°C/W difference allows TO252 to dissipate ~1.4× more power at the same junction temperature, supporting full 1A operation in denser layouts.
Is AP1117DG-13 pin-compatible with standard LM1117-3.3 regulators?
Yes - AP1117DG-13 uses the same TO252-3 pinout (VIN-VOUT-GND) and electrical behavior as industry-standard 1117-family fixed 3.3V regulators. It offers improved specs: lower dropout (1.3V vs. 1.4V typ), tighter load regulation (26–33mV vs. 40–60mV), and extended -40°C to +125°C operation.
AP1117DG-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:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- 5V
- 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
AP1117DG-13 FAQ
1.How can I place an order for AP1117DG-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1117DG-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 AP1117DG-13 reliable?
The price and inventory of AP1117DG-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1117DG-13 is usually 5 days.
3.What payment methods are accepted for AP1117DG-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1117DG-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1117DG-13?
AP1117DG-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1117DG-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 AP1117DG-13?
For technical support, including AP1117DG-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1117DG-13 requirements.
6.How does Aetrix verify that AP1117DG-13 is sourced from the original manufacturer or authorized distributors?
All AP1117DG-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 AP1117DG-13 meets industry standards.
7.What is the process for return or replacement of AP1117DG-13?
All AP1117DG-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1117DG-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 AP1117DG-13 part is unused and in its original packaging.
Return procedure for AP1117DG-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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