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Diodes Incorporated AP1117IDG-13
- Part No.:
- AP1117IDG-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
AP1117IDG-13.pdf
- Description:
- IC REG LINEAR POS ADJ 1A TO252-3
- Quantity:
- Payment:
- Shipping:
Inventory:163
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Product details
Overview
AP1117IDG-13 from Diodes Incorporated is an industrial-grade, 1A low-dropout linear regulator in SOT223 package, configured for fixed 3.3V output. It delivers stable voltage with ≤1.4V dropout at full load, supports 6.4–18V input, and operates across –40°C to +125°C junction temperature-designed for VGA cards, PC peripherals, and 3.3V logic supply in noise-sensitive embedded systems.
For engineers reviewing the AP1117IDG-13 datasheet, AP1117IDG-13 pinout, AP1117IDG-13 application, or AP1117IDG-13 equivalent, key selection criteria include dropout voltage at 1A load, thermal shutdown behavior, output stability with MLCC capacitors, and compatibility with SOT223 PCB thermal pad layouts per AP02001.
Technical Context
The AP1117IDG-13 implements a bandgap-referenced error amplifier driving a PNP pass transistor, enabling precise 3.3V regulation with 1.25V internal reference and adjustable feedback path (not used in fixed version). Its fast transient response is achieved via internal compensation optimized for ≥4.7µF ceramic output capacitance with ESR ≤0.5Ω.
Thermal protection activates at ~150°C junction temperature, cycling output off/on during overload; steady-state operation requires θJA ≤107°C/W on 2oz FR-4 with 5mm×5mm copper pad. Input-to-output differential must remain ≥1.3V for regulation, and minimum load current is 5mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±2% (3.235–3.365V) at 10mA, 4.8–12V input |
| Max Dropout Voltage | 1.4V at 1A load and ΔVOUT = 1% VOUT, enabling 4.7V min input for 3.3V output |
| Load Regulation | ≤33mV over 0–1A load (VIN = 5V), critical for stable bus termination under dynamic current |
| Ripple Rejection | 60–70dB at 180Hz, ensuring clean power for analog/RF sections adjacent to digital logic |
| Junction Temp Range | –40°C to +125°C, validated for industrial environments without derating up to 125°C |
| Thermal Resistance | θJA = 107°C/W (SOT223, 2oz Cu, 5mm×5mm pad, no airflow), defining max continuous power dissipation |
| Stability Capacitor | Requires ≥4.7µF X7R MLCC (ESR ≤0.5Ω) at VOUT; supports Y5V-free layout compliance |
Pinout & Package
SOT223 package with exposed thermal tab electrically connected to VOUT; 3-pin configuration optimized for surface-mount thermal management on 2oz copper PCBs using Diodes' AP02001 pad layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Adj/GND) | Ground reference terminal | Internally tied to GND for fixed 3.3V mode; not adjustable-must be connected directly to system ground plane |
| 2 (VOUT) | Regulated output node | Delivers 3.3V; tab is electrically common with this pin-requires low-inductance connection to output capacitor and load ground |
| 3 (VIN) | Unregulated input supply | Accepts 6.4–18V; requires ≥4.7µF input capacitor (ESR ≤0.5Ω) placed within 10mm to prevent input sag during transients |
Key Features
| Feature | Design Value |
|---|---|
| Industrial temperature grade | –40°C to +125°C operation without external derating, supporting extended-range embedded control |
| MLCC-compatible stability | Stable with ≥4.7µF X7R ceramic capacitors-enables compact, high-reliability designs vs. tantalum-dependent alternatives |
| Fast transient response | Sub-20µs recovery from 100mA→1A load steps, minimizing voltage droop in burst-mode digital loads |
| Integrated thermal shutdown | Auto-cycles output at ~150°C junction temp-prevents permanent damage during sustained overload or poor heatsinking |
| Low-noise regulation | 60–70dB ripple rejection at 180Hz-preserves signal integrity in mixed-signal PCBs with shared power rails |
Applications
| VGA Graphics Card Power | PC Peripheral Interface |
|---|---|
Use Scenario: Providing clean 3.3V rail to GPU memory buffers and display interface circuitry. IC Role / Device Role / Timing Role: Primary voltage regulator for I/O domain, decoupled from core logic supply. Use Value: 1.4V dropout enables use of 4.7V intermediate bus; 70dB ripple rejection prevents pixel noise in analog video outputs. | Use Scenario: Powering USB hub controllers, SATA bridge ICs, and PCIe endpoint logic on add-in cards. IC Role / Device Role / Timing Role: Local point-of-load regulator delivering stable 3.3V to high-speed serial interface PHYs. Use Value: Fast transient response maintains eye diagram integrity during packet bursts; SOT223 thermal pad dissipates 1.5W continuously. |
| Industrial Communication Module | Consumer Set-Top Box Logic Supply |
Use Scenario: Supplying 3.3V to RS-485 transceivers, Ethernet PHYs, and microcontroller peripherals in factory-floor equipment. IC Role / Device Role / Timing Role: Isolated LDO for noise-sensitive communication interfaces operating across wide ambient temperatures. Use Value: –40°C to +125°C rating ensures reliability in uncontrolled enclosures; built-in current limiting protects against cable fault conditions. | Use Scenario: Generating 3.3V for HDMI controller, audio DAC, and tuner SoC logic in residential entertainment devices. IC Role / Device Role / Timing Role: Secondary regulator downstream of buck converter, filtering switching noise before sensitive digital blocks. Use Value: 60dB+ ripple rejection eliminates audible buzz in audio subsystems; RoHS/Green compliance meets global consumer safety mandates. |
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 |
|---|---|---|---|
| LD1117S33TR | 1A rated, 1.2V dropout typical at 1A, but only guaranteed to 0°C–125°C (commercial grade) | Lacks industrial –40°C rating; unsuitable for cold-storage or outdoor deployments | Select when ambient stays >0°C and cost sensitivity outweighs extended temp needs |
| TLV1117-33IDCYR | 1A rated, 1.2V max dropout, 65dB ripple rejection, but requires ≥10µF output cap for stability | Higher ESR tolerance but larger footprint (SOT-223 variant DCY); less MLCC-optimized | Prefer when existing design uses bulkier tantalum caps and board space allows larger thermal pad |
Compared with LD1117S33TR and TLV1117-33IDCYR, AP1117IDG-13 provides verified –40°C operation and superior MLCC compatibility-making it optimal for space-constrained industrial designs requiring robust thermal performance and low-noise 3.3V rails.
Availability
AP1117IDG-13 is available at Aetrix Electronics and suitable for VGA graphics cards, industrial communication modules, and consumer set-top boxes requiring stable component supply with guaranteed industrial temperature performance and RoHS/Green compliance.
Supply support for AP1117IDG-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-sensitive, thermally demanding LDO applications where dropout voltage, thermal shutdown robustness, and MLCC stability are prioritized over ultra-low quiescent current or programmability.
FAQ
What is the minimum input voltage required for AP1117IDG-13 to maintain 3.3V regulation?
The device requires VIN ≥ VOUT + 1.3V for proper regulation, so minimum input is 4.6V. At 1A load, worst-case dropout is 1.4V, meaning 4.7V input ensures margin. Below 4.6V, output drops linearly with input-no brown-out protection or undervoltage lockout is included.
Can AP1117IDG-13 be used with 1µF ceramic output capacitors?
No-datasheet specifies minimum 4.7µF X7R MLCC (ESR ≤0.5Ω) for stability. Using 1µF violates compensation requirements and risks oscillation, especially under load transients. The 22µF value cited for sub-zero operation is a derated recommendation, not a minimum.
Does AP1117IDG-13 include reverse-polarity or reverse-current protection?
No. The device lacks internal reverse-battery or reverse-current blocking. If input can fall below output (e.g., during hot-swap or backup battery scenarios), an external Schottky diode from VIN to VOUT is required to prevent backfeed and potential damage to upstream circuitry.
How does thermal shutdown behave during sustained overload?
When junction temperature reaches ~150°C, the regulator disables output and remains off until die cools to ~135°C, then re-enables. This hiccup-mode cycling prevents permanent damage but causes output voltage interruption-designers must size heatsinking or limit duty cycle to avoid repeated cycling in continuous overload conditions.
AP1117IDG-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 Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-252-3
AP1117IDG-13 FAQ
1.How can I place an order for AP1117IDG-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1117IDG-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 AP1117IDG-13 reliable?
The price and inventory of AP1117IDG-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1117IDG-13 is usually 5 days.
3.What payment methods are accepted for AP1117IDG-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1117IDG-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1117IDG-13?
AP1117IDG-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1117IDG-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 AP1117IDG-13?
For technical support, including AP1117IDG-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1117IDG-13 requirements.
6.How does Aetrix verify that AP1117IDG-13 is sourced from the original manufacturer or authorized distributors?
All AP1117IDG-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 AP1117IDG-13 meets industry standards.
7.What is the process for return or replacement of AP1117IDG-13?
All AP1117IDG-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1117IDG-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 AP1117IDG-13 part is unused and in its original packaging.
Return procedure for AP1117IDG-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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