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Diodes Incorporated AP1117E33L-13
- Part No.:
- AP1117E33L-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
AP1117E33L-13.pdf
- Description:
- IC REG LINEAR 3.3V 1A SOT223
- Quantity:
- Payment:
- Shipping:
Inventory:2,397
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Product details
Overview
AP1117E33L-13 from Diodes Incorporated is a 1A low-dropout linear regulator in fixed 3.3V output mode, housed in a SOT223 package. It delivers stable voltage regulation with ≤1.4V dropout at full load, supports input voltages from 4.8V to 12V, and operates across 0°C to +125°C junction temperature. It is used in PC peripherals and communication equipment requiring clean, compact 3.3V supply for logic and bus termination.
For engineers reviewing the AP1117E33L-13 datasheet, AP1117E33L-13 pinout, AP1117E33L-13 application, or AP1117E33L-13 equivalent, key selection criteria include dropout voltage at 1A load, thermal shutdown behavior, output stability with MLCC capacitors, and SOT223 thermal resistance (θJA = 107°C/W on standard FR-4).
Technical Context
The AP1117E33L-13 integrates an internal reference (1.25V ±2.5%), error amplifier, current-limit protection, and thermal shutdown circuitry. Its feedback is internally trimmed for fixed 3.3V output, eliminating external resistors and reducing layout sensitivity.
It achieves fast transient response via optimized internal compensation and supports stable operation with 4.7µF ceramic (X7R) or 22µF tantalum output capacitors - ESR must remain between 0.15Ω and 0.5Ω. Input voltage must exceed VOUT by ≥1.3V for regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.300V ±2% (guaranteed over 0–125°C junction temp, 10mA–1A load) |
| Dropout Voltage | 1.4V max at 1A load (ensures regulation down to VIN = 4.7V for 3.3V output) |
| Load Regulation | ±33mV (0–1A load change at VIN = 5V; impacts system voltage margin under dynamic load) |
| Line Regulation | 0.2% max (input variation from VOUT+1.5V to 12V; critical for unregulated DC rails) |
| Thermal Shutdown | Activates at ~150°C junction temp; auto-recovery upon cooling (prevents permanent damage during overload) |
| Quiescent Current | ≤10mA (enables low-power standby modes without compromising regulation stability) |
| Ripple Rejection | 60–70dB at 180Hz (suppresses switching noise from upstream DC/DC converters) |
Pinout & Package
SOT223 package with exposed thermal tab electrically connected to VOUT; requires minimum 5mm × 5mm copper pad on PCB for thermal management (θJA = 107°C/W per datasheet test condition).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Adj/GND) | Ground reference terminal | Internally tied to GND for fixed-output variants; no external connection required |
| 2 (VOUT) | Regulated output node | Connected to thermal tab; must use ≥4.7µF capacitor (ESR 0.15–0.5Ω) placed within 10mm for stability |
| 3 (VIN) | Unregulated input supply | Requires ≥4.7µF decoupling cap near pin; must be ≥1.3V above VOUT to maintain regulation |
Key Features
| Feature | Design Value |
|---|---|
| Lead-free & Halogen-free construction | SOT223 package meets RoHS 2011/65/EU and Diodes Inc.'s "Green" definition (<900ppm Br/Cl, <1000ppm Sb) |
| MLCC-compatible stability | Stable with 4.7µF X7R ceramic capacitors - eliminates need for bulkier tantalum or aluminum electrolytics |
| Fast transient response | Typical load-step recovery <100µs (100mA ↔ 1A); minimizes output droop in burst-mode digital loads |
| Internal current limiting | Guaranteed 1.1A min current limit protects against short-circuit faults without external foldback circuitry |
| Thermal resistance optimization | θJC = 15°C/W (junction-to-tab); enables effective heat transfer to PCB copper when tab is soldered to thermal pad |
Applications
| PC Peripheral Power | Communication Module Supply |
|---|---|
|
Use Scenario: Providing regulated 3.3V to USB hub controllers and PCIe endpoint logic on add-in cards. IC Role / Device Role / Timing Role: Primary LDO supplying core logic voltage; replaces switching regulators where low noise and simplicity are prioritized over efficiency. Use Value: Eliminates need for external feedback resistors and reduces BOM count while maintaining ±33mV load regulation across full current range. |
Use Scenario: Powering Ethernet PHY transceivers and UART interface ICs in industrial gateways. IC Role / Device Role / Timing Role: Clean post-regulator for noise-sensitive analog front-ends and clock buffers. Use Value: 60–70dB ripple rejection at 180Hz suppresses switching artifacts from upstream 12V DC/DC converters, improving signal integrity. |
| VGA Card Logic Rail | Consumer Equipment Low-Power Core |
|
Use Scenario: Delivering 3.3V to VGA DACs and timing controller ICs in legacy graphics adapters. IC Role / Device Role / Timing Role: Fixed-output LDO ensuring stable reference voltage for analog video signal generation. Use Value: Guaranteed 1.25V reference accuracy (±2.5%) and <0.5% temperature drift enable consistent color fidelity across operating temperature. |
Use Scenario: Supplying 3.3V to microcontroller I/O banks and sensor interfaces in smart home hubs. IC Role / Device Role / Timing Role: Standby-capable voltage source supporting low-quiescent-current sleep modes. Use Value: ≤10mA quiescent current allows >1-year battery life in coin-cell-powered configurations when paired with enable-controlled upstream stages. |
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 |
|---|---|---|---|
| AMS1117-3.3 | Higher dropout (1.3V typ @ 1A), wider load regulation (±50mV), no MLCC-optimized compensation | Limited to ambient-temp-only designs; less suitable for high-transient consumer devices | Acceptable only if input headroom ≥4.6V and output capacitance is ≥22µF tantalum |
| LD1117S33TR | Lower thermal resistance (θJA = 70°C/W), tighter line regulation (0.1%), but requires ≥10µF output cap | Better suited for space-constrained industrial modules needing higher power density | Preferred when board area allows smaller thermal pad and tighter input voltage tolerance is required |
Compared with AMS1117-3.3 and LD1117S33TR, AP1117E33L-13 offers superior MLCC compatibility and lower quiescent current, making it optimal for cost-sensitive, noise-sensitive, and thermally constrained designs where 4.7µF ceramic output caps are mandatory.
Availability
AP1117E33L-13 is available at Aetrix Electronics and suitable for PC peripheral power, communication module supply, and consumer equipment low-power core applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AP1117E33L-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, headquartered in Plano, Texas, with design centers across Asia and Europe.
The AP1117 series belongs to Diodes' precision linear regulator product line, engineered specifically for high-reliability, low-noise, fixed- and adjustable-output applications in computing, communications, and industrial systems.
FAQ
Is AP1117E33L-13 pin-compatible with other 1117-family regulators?
Yes - AP1117E33L-13 uses the standard SOT223 pinout (VIN–VOUT–GND) and matches mechanical and electrical footprints of industry-standard 1117 regulators including AMS1117 and LD1117. However, its improved MLCC stability and tighter load regulation require verification of output capacitor ESR and layout proximity per datasheet Section 7.
What is the minimum input voltage required for regulation at 1A load?
The minimum input voltage is 4.7V: VOUT (3.3V) + maximum dropout (1.4V). At 1A load and 25°C, typical dropout is 1.3V, but design must accommodate worst-case 1.4V across 0–125°C junction temperature. Below 4.7V, output voltage drops linearly with input.
Can AP1117E33L-13 be used with ceramic capacitors only?
Yes - it is explicitly characterized for stability with 4.7µF X7R MLCCs (ESR 0.15–0.5Ω). Y5V dielectrics are prohibited due to capacitance loss at bias/voltage/temperature; X7R ensures consistent performance across operating conditions without requiring parallel tantalum.
Does AP1117E33L-13 support reverse-voltage protection?
No - the device lacks internal reverse-battery or reverse-polarity protection. If input may be reversed or disconnected while output remains biased, an external series Schottky diode (e.g., 1N5819) must be added between VIN and the regulator input to prevent backfeed and potential damage.
AP1117E33L-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):
- 3.3V
- 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
AP1117E33L-13 FAQ
1.How can I place an order for AP1117E33L-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1117E33L-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 AP1117E33L-13 reliable?
The price and inventory of AP1117E33L-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1117E33L-13 is usually 5 days.
3.What payment methods are accepted for AP1117E33L-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1117E33L-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1117E33L-13?
AP1117E33L-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1117E33L-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 AP1117E33L-13?
For technical support, including AP1117E33L-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1117E33L-13 requirements.
6.How does Aetrix verify that AP1117E33L-13 is sourced from the original manufacturer or authorized distributors?
All AP1117E33L-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 AP1117E33L-13 meets industry standards.
7.What is the process for return or replacement of AP1117E33L-13?
All AP1117E33L-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1117E33L-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 AP1117E33L-13 part is unused and in its original packaging.
Return procedure for AP1117E33L-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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