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Diodes Incorporated AP1117IE33G-13
- Part No.:
- AP1117IE33G-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
AP1117IE33G-13.pdf
- Description:
- IC REG LINEAR 3.3V 1A SOT223-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,290
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Product details
Overview
AP1117IE33G-13 from Diodes Incorporated is a 1A low-dropout linear regulator in fixed 3.3V output mode, housed in an industrial-grade SOT223 package with -40°C to +125°C junction temperature range. It delivers stable 3.3V at up to 1A load with ≤1.4V dropout at full current, 33mV load regulation (0–1A), and 60–70dB ripple rejection at 180Hz - designed for high-speed bus termination and low-current logic supply in VGA cards and PC peripherals.
For engineers reviewing the AP1117IE33G-13 datasheet, AP1117IE33G-13 pinout, AP1117IE33G-13 application, or AP1117IE33G-13 equivalent, key selection criteria include dropout voltage under 1.4V at 1A, thermal shutdown activation at ~150°C, fixed 3.3V output tolerance of ±2%, minimum 4.7µF ceramic output capacitance requirement, and SOT223 thermal resistance (θJA = 107°C/W on standard FR-4).
Technical Context
The AP1117IE33G-13 implements a bandgap-referenced error amplifier driving a PNP pass transistor, enabling fast transient response and stable regulation across input voltages from 4.8V to 12V. Its internal current limiting and thermal shutdown circuitry activate at ≥1.1A and ~150°C respectively, ensuring safe operation during overload or ambient extremes.
It operates exclusively in fixed-output mode (3.3V), eliminating external feedback resistors. The device requires both input and output capacitors with ESR between 0.15Ω and 0.5Ω - compatible with X7R MLCCs but not Y5V dielectrics - and mandates PCB trace lengths ≤10mm to maintain stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±2% (3.235–3.365V) at 10mA, 4.8–12V input - ensures compatibility with 3.3V logic families without external adjustment. |
| Dropout Voltage | ≤1.4V at 1A load (ΔVOUT = 1% VOUT) - enables regulation from 4.7V input, critical for 5V-to-3.3V conversion in space-constrained designs. |
| Load Regulation | ≤33mV over 0–1A load range at VIN = 5V - maintains tight voltage control during dynamic current draw in peripheral interfaces. |
| Ripple Rejection | 60–70dB at 180Hz with 25µF tantalum output cap - suppresses switching noise from upstream DC/DC converters feeding the LDO. |
| Thermal Shutdown | Activates at ~150°C junction temperature - protects against sustained overload or inadequate heatsinking in enclosed industrial enclosures. |
| Operating Junction Temp | -40°C to +125°C - supports deployment in automotive cabin modules, industrial controllers, and outdoor communication equipment. |
| Package Thermal Resistance | θJA = 107°C/W (FR-4, 2oz Cu, 5mm×5mm pad, no airflow) - defines maximum power dissipation (≈1.1W) before thermal shutdown under standard layout. |
Pinout & Package
SOT223 package with exposed thermal tab electrically connected to VOUT; footprint optimized for PCB heat spreading using 5mm×5mm copper pad (Diodes AP02001 recommended). Tab must be soldered to ground plane or dedicated thermal plane for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Adj/GND) | Ground reference terminal | Internally tied to GND for fixed-output variants; no external connection required - simplifies layout vs. adjustable versions. |
| 2 (VOUT) | Regulated output node | Electrically connected to thermal tab; requires ≥4.7µF ceramic capacitor (X7R, ESR ≤0.5Ω) placed ≤10mm away for stability. |
| 3 (VIN) | Unregulated input supply | Must remain ≥1.3V above VOUT to sustain regulation; requires ≥4.7µF decoupling cap (ESR ≤0.5Ω) adjacent to pin to prevent input sag during transients. |
Key Features
| Feature | Design Value |
|---|---|
| 1.4V max dropout at 1A | Enables efficient 5V-to-3.3V conversion with minimal power loss (≤1.4W dissipation), reducing heatsink requirements in compact PCBs. |
| Built-in thermal shutdown | Self-protecting operation prevents permanent damage during sustained overload or poor thermal design - cycles output on/off as die cools. |
| MLCC-compatible stability | Stable with low-ESR X7R ceramic capacitors (≥4.7µF), eliminating need for bulkier tantalum or aluminum electrolytics in cost-sensitive designs. |
| Industrial temperature grade | Rated for -40°C to +125°C operation - qualified for use in factory automation controllers, telecom line cards, and embedded gateways. |
| Lead-free & halogen-free | RoHS-compliant (EU 2011/65/EU) and "Green" certified (<900ppm Br, <900ppm Cl, <1000ppm Sb) - meets environmental compliance for global OEM shipments. |
Applications
| PC Peripheral Power | VGA Card Logic Supply |
|---|---|
|
Use Scenario: Providing clean 3.3V rail to USB controller ICs, SATA bridge chips, and PCIe endpoint logic on add-in cards. IC Role / Device Role / Timing Role: Primary low-noise post-regulator converting 5V system rail to 3.3V logic domain. Use Value: 60–70dB ripple rejection prevents digital noise coupling into high-speed data lanes, maintaining signal integrity per USB 2.0/3.0 specs. |
Use Scenario: Powering GPU core I/O buffers, display interface serializers (e.g., TMDS), and EDID EEPROM on legacy VGA graphics cards. IC Role / Device Role / Timing Role: Fixed-output LDO delivering stable 3.3V to timing-critical video interface circuitry. Use Value: ≤33mV load regulation ensures consistent voltage during pixel clock transitions, preventing display artifacts or sync loss. |
| Industrial Communication Module | Embedded Controller I/O Rail |
|
Use Scenario: Supplying isolated 3.3V to RS-485 transceivers, CAN controllers, and Ethernet PHY management logic in DIN-rail mounted gateways. IC Role / Device Role / Timing Role: Local point-of-load regulator for communication interface ICs requiring low-noise, thermally robust supply. Use Value: -40°C to +125°C rating and thermal shutdown enable reliable operation in unventilated industrial enclosures with ambient temps up to 70°C. |
Use Scenario: Powering GPIO expanders, sensor ADCs, and real-time clock (RTC) circuits in programmable logic controllers (PLCs) and HMI panels. IC Role / Device Role / Timing Role: Dedicated low-quiescent LDO for always-on subsystems needing precise 3.3V reference. Use Value: ≤2% output tolerance and 0.5%/W thermal regulation ensure accurate ADC sampling and RTC timekeeping across temperature swings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP1117E33G-13 | Commercial-grade (-20°C to +125°C) version with identical electrical specs and SOT223 package. | Limited to non-industrial environments (e.g., consumer PCs, office peripherals); lacks extended low-temp capability. | Select when operating ambient stays above -20°C and cost sensitivity outweighs thermal margin requirements. |
| LD1117S33TR | STMicroelectronics' pin-compatible 3.3V LDO; 1.2V dropout at 1A, 1.2% initial accuracy, but only rated to -40°C to +125°C with reduced load regulation (±50mV). | Higher dropout margin allows tighter input voltage margins; lower accuracy may affect precision analog subsystems. | Choose when lower dropout is prioritized over load regulation tightness, and ST's qualification ecosystem is preferred. |
Compared with AP1117E33G-13, the AP1117IE33G-13 adds guaranteed -40°C startup and operation, while LD1117S33TR trades 0.2V lower dropout for looser load regulation - making the Diodes part optimal for thermally demanding industrial edge nodes where regulation stability across temperature is critical.
Availability
AP1117IE33G-13 is available at Aetrix Electronics and suitable for PC peripheral power, VGA card logic supply, industrial communication modules, and embedded controller I/O rails requiring stable component supply with industrial temperature assurance and RoHS compliance.
Supply support for AP1117IE33G-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 communications markets.
The AP1117 series targets cost-effective, thermally robust linear regulation for legacy and new-design 3.3V logic domains - emphasizing dropout performance, MLCC compatibility, and extended temperature operation over ultra-low quiescent current.
FAQ
Is AP1117IE33G-13 pin-compatible with other 1117-family regulators?
Yes - it uses the standard SOT223 3-pin footprint (VIN-VOUT-GND) and shares identical pinout with industry-standard 1117 regulators including LM1117, LD1117, and MIC5205. The thermal tab is connected to VOUT, matching mechanical and thermal mounting conventions across the family.
What output capacitor types are validated for AP1117IE33G-13 stability?
Diodes validates 4.7µF X7R MLCCs (ESR ≤0.5Ω), 4.7µF solid tantalum, and 47µF aluminum electrolytic (with parallel 1µF MLCC). Y5V ceramics are explicitly prohibited due to capacitance drift; minimum 10mm trace length limits apply for all types to avoid instability.
Does AP1117IE33G-13 require an input capacitor?
Yes - a minimum 4.7µF capacitor (ceramic or tantalum, ESR ≤0.5Ω) must be placed ≤10mm from VIN to ground. This prevents input voltage sag during load transients and ensures stability; omitting it risks oscillation or dropout during peak current demand.
Why is AP1117IE33G-13 marked "NOT RECOMMENDED FOR NEW DESIGN"?
Diodes recommends AZ1117C/E for new designs due to improved PSRR, lower dropout (1.1V typ), and enhanced thermal performance. AP1117IE33G-13 remains fully supported for legacy refresh, repair, and cost-sensitive industrial applications where its 1.4V dropout and proven reliability meet system requirements.
AP1117IE33G-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:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
AP1117IE33G-13 FAQ
1.How can I place an order for AP1117IE33G-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1117IE33G-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 AP1117IE33G-13 reliable?
The price and inventory of AP1117IE33G-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1117IE33G-13 is usually 5 days.
3.What payment methods are accepted for AP1117IE33G-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1117IE33G-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1117IE33G-13?
AP1117IE33G-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1117IE33G-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 AP1117IE33G-13?
For technical support, including AP1117IE33G-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1117IE33G-13 requirements.
6.How does Aetrix verify that AP1117IE33G-13 is sourced from the original manufacturer or authorized distributors?
All AP1117IE33G-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 AP1117IE33G-13 meets industry standards.
7.What is the process for return or replacement of AP1117IE33G-13?
All AP1117IE33G-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1117IE33G-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 AP1117IE33G-13 part is unused and in its original packaging.
Return procedure for AP1117IE33G-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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