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Diodes Incorporated AP1117KG-13
- Part No.:
- AP1117KG-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
AP1117KG-13.pdf
- Description:
- IC REG LINEAR POS ADJ 1A TO263
- Quantity:
- Payment:
- Shipping:
Inventory:2,059
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Product details
Overview
AP1117KG-13 from Diodes Incorporated is a 1A low-dropout positive linear regulator in TO263-3L package, configured for fixed 3.3V output. It delivers stable regulation with ≤1.4V dropout at full load, supports input voltages from 4.8V to 12V, and integrates thermal shutdown and current limiting-used in VGA cards, PC peripherals, and 3.3V logic supply rails.
For engineers reviewing the AP1117KG-13 datasheet, AP1117KG-13 pinout, AP1117KG-13 application, or AP1117KG-13 equivalent, key selection criteria include dropout voltage under 1A load, thermal resistance (θJA = 60°C/W), fixed 3.3V output tolerance (±2%), and TO263-3L thermal pad compatibility with high-power PCB layouts.
Technical Context
The AP1117KG-13 implements a bandgap-referenced error amplifier driving a PNP pass transistor, enabling fast transient response and 70dB ripple rejection at 180Hz. Its internal current limit activates at ≥1.1A and thermal shutdown engages at ~150°C junction temperature.
Designed for fixed-output operation, it requires no external feedback resistors-pin 1 is grounded, pin 2 is VOUT (3.3V), and pin 3 is VIN. The TO263-3L package's exposed thermal tab (connected to VOUT) enables efficient heat dissipation in high-current applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±2% (2.45V–3.365V over load/temperature) |
| Dropout Voltage | 1.4V max at 1A load-enables regulation from 4.8V input to 3.3V output |
| Output Current | 1A continuous-supports logic rails, bus termination, and peripheral ICs |
| Ripple Rejection | 70dB at 180Hz-rejects switching noise from upstream DC/DC converters |
| Thermal Resistance θJA | 60°C/W (TO263-3L on FR-4, 2oz copper, 5mm×5mm pad)-limits junction rise to ~60°C at 1W dissipation |
| Line Regulation | 0.2%-ensures <±6.6mV output shift across 4.8–12V input range |
| Load Regulation | 26–33mV (0–1A load)-maintains tight voltage stability under dynamic loads |
Pinout & Package
AP1117KG-13 uses the TO263-3L (D²PAK) surface-mount package with an exposed thermal tab electrically connected to VOUT. The tab must be soldered to a large copper pour for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Adj/GND) | Ground reference | Internally tied to GND for fixed 3.3V mode-no external resistor network required |
| 2 (VOUT) | Regulated output | 3.3V source; connects directly to thermal tab-requires ≥10µF output capacitor (ESR 0.15–20Ω) for stability |
| 3 (VIN) | Input supply | Accepts 4.8–12V DC; must remain ≥1.3V above VOUT to sustain regulation during transients |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout voltage | 1.4V max at 1A-enables use with narrow input-output margins (e.g., 5V rail → 3.3V logic) |
| Integrated protection | Thermal shutdown + current limiting-prevents damage during overload or poor heatsinking |
| High ripple rejection | 70dB at 180Hz-preserves signal integrity in mixed-signal systems powered from noisy SMPS |
| Fixed-output configuration | No external feedback components needed-reduces BOM count and layout area for 3.3V rails |
| RoHS-compliant packaging | Lead-free, green molding compound (no Br/Sb)-meets environmental compliance for industrial and consumer products |
Applications
| VGA Graphics Card Power | PC Peripheral Interface |
|---|---|
|
Use Scenario: Supplies clean 3.3V to GPU memory buffers and display interface circuitry. IC Role / Device Role / Timing Role: Primary LDO regulator delivering stable voltage to high-speed digital logic blocks. Use Value: Low dropout ensures regulation even when PCIe slot voltage sags to 4.8V; fast transient response prevents data corruption during burst writes. |
Use Scenario: Powers USB hub controllers, SATA bridge ICs, and PCIe switch logic in desktop add-in cards. IC Role / Device Role / Timing Role: Fixed-output voltage source for 3.3V I/O domains requiring low noise and high current capability. Use Value: 70dB ripple rejection suppresses switching noise from adjacent DC/DC converters, reducing bit errors in high-speed serial links. |
| Industrial Control Module | Embedded Communication Board |
|
Use Scenario: Provides regulated 3.3V to microcontroller I/O banks and sensor interface circuitry in PLC modules. IC Role / Device Role / Timing Role: Local point-of-load regulator ensuring stable supply despite wide ambient temperature swings (0–125°C). Use Value: Guaranteed operation up to 125°C junction temperature and ±0.5% temperature stability enable reliable field deployment without derating. |
Use Scenario: Supplies 3.3V to Ethernet PHYs, CAN transceivers, and RS-485 line drivers in gateway devices. IC Role / Device Role / Timing Role: Noise-suppressed power source for analog front-end and timing-critical communication interfaces. Use Value: 26–33mV load regulation maintains voltage accuracy across varying packet traffic loads, preventing link renegotiation failures. |
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 |
|---|---|---|---|
| TLV1117-33CDCR | 0.8V dropout at 800mA; 1.2V max input voltage rating (15V); SOT-223-3 package | Lower thermal mass; less suitable for sustained 1A loads without aggressive PCB cooling | Select when board space is constrained and peak current stays below 800mA |
| MIC29302WU-3.3 | 0.4V dropout at 3A; higher quiescent current (40mA vs. 10mA); TO-263-5 package with separate GND pin | Requires external GND connection; better for ultra-low dropout but adds routing complexity | Select when input voltage is near 3.3V (e.g., 3.7V Li-ion) and 1A+ sustained current is required |
Compared with TLV1117-33CDCR and MIC29302WU-3.3, AP1117KG-13 offers balanced dropout (1.4V), proven thermal robustness in TO263-3L, and simpler 3-pin fixed-output implementation-ideal for cost-sensitive, thermally demanding 3.3V rail designs where input exceeds 4.8V.
Availability
AP1117KG-13 is available at Aetrix Electronics and suitable for VGA graphics cards, PC peripheral interfaces, and industrial control modules requiring stable component supply, RoHS compliance, and TO263-3L thermal performance.
Supply support for AP1117KG-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 power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
The AP1117 product line delivers low-dropout linear regulators optimized for high-current, low-noise local regulation in space-constrained PCBs-targeting applications like bus termination, logic supply, and peripheral power where simplicity and reliability are critical.
FAQ
What is the minimum input voltage required for AP1117KG-13 to regulate 3.3V output?
The AP1117KG-13 requires VIN ≥ VOUT + 1.3V to maintain regulation, so minimum input is 4.6V. At full 1A load, dropout reaches 1.4V, meaning 4.7V input is recommended for margin. Below this threshold, output voltage drops linearly with input.
Can AP1117KG-13 be used in adjustable-output configuration?
No-AP1117KG-13 is factory-configured as a fixed 3.3V device. Pin 1 (Adj/GND) is internally connected to ground. For adjustable operation, select AP1117E-ADJ or AP1117K-ADJ variants with external resistor dividers.
Is a heatsink required for AP1117KG-13 operating at 1A continuous current?
A dedicated heatsink is not required if the PCB provides adequate copper area: Diodes specifies a 5mm×5mm thermal pad on 2oz copper for θJA = 60°C/W. At 1A with 5V input (3.5W dissipation), junction temperature rises ~210°C above ambient-so ≥25°C ambient or forced airflow is mandatory for sustained 1A operation.
What output capacitor value and type are recommended for stability?
Diodes specifies ≥10µF tantalum or ceramic capacitor with ESR between 0.15Ω and 20Ω. A 22µF tantalum (e.g., TAJ series) or 22µF X7R ceramic with 1Ω series resistor meets both capacitance and ESR requirements. Smaller ceramics (<1µF) alone cause instability due to insufficient ESR.
AP1117KG-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:
- 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-263
AP1117KG-13 FAQ
1.How can I place an order for AP1117KG-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1117KG-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 AP1117KG-13 reliable?
The price and inventory of AP1117KG-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1117KG-13 is usually 5 days.
3.What payment methods are accepted for AP1117KG-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1117KG-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1117KG-13?
AP1117KG-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1117KG-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 AP1117KG-13?
For technical support, including AP1117KG-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1117KG-13 requirements.
6.How does Aetrix verify that AP1117KG-13 is sourced from the original manufacturer or authorized distributors?
All AP1117KG-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 AP1117KG-13 meets industry standards.
7.What is the process for return or replacement of AP1117KG-13?
All AP1117KG-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1117KG-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 AP1117KG-13 part is unused and in its original packaging.
Return procedure for AP1117KG-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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