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Diodes Incorporated AP1118D25L-13
- Part No.:
- AP1118D25L-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-252-6, DPAK (5 Leads + Tab)
- Datasheet:
-
AP1118D25L-13.pdf
- Description:
- IC REG LINEAR 2.5V 1A TO252-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,414
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Product details
Overview
AP1118D25L-13 from Anachip Corp. is a 1A low-dropout linear regulator with fixed 2.5V output, TTL/CMOS-compatible enable input, and 1.4V max dropout at full load. It delivers stable voltage for low-voltage ICs such as 3.3V logic supplies and high-speed bus termination, operating with input up to 18V and supporting thermal shutdown and current limiting.
For engineers reviewing the AP1118D25L-13 datasheet, AP1118D25L-13 pinout, AP1118D25L-13 application, or AP1118D25L-13 equivalent, key selection criteria include dropout voltage under 1.4V at 1A, ±2% output voltage accuracy at 10mA, EN logic compatibility (0.8V low / 1.6V high), and TO252-5L package thermal resistance of 102°C/W.
Technical Context
The AP1118D25L-13 implements a PNP pass transistor architecture with internal bandgap reference and error amplifier, enabling fast transient response and <1.4V dropout across its 2.5V output range. Its enable pin features an internal 100kΩ pull-down resistor, ensuring default-on operation when left floating.
Designed for fixed-output regulation only, it lacks adjustable feedback or external compensation pins. Ripple rejection is 60–70dB at 120Hz with 25µF tantalum output capacitor, and load regulation remains within ±33mV from 0–1A at 5V input.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±2% at 10mA, 25°C - ensures compatibility with 2.5V logic families and ADC references |
| Max Dropout Voltage | 1.4V at 1A load - enables regulation from 3.9V input, critical for battery-powered 2.5V systems |
| Enable Input Threshold | Logic Low ≤0.8V (enable), Logic High ≥1.6V (disable) - interoperable with 3.3V and 5V microcontrollers |
| Load Regulation | ±33mV (2.5V version) over 0–1A - maintains tight voltage control during CPU core current transients |
| Ripple Rejection | 60–70dB at 120Hz - suppresses switching noise from upstream DC/DC converters feeding the LDO |
| Thermal Resistance θJA | 102°C/W (TO252-5L, no heatsink) - defines maximum power dissipation limit of ~1.4W at 70°C ambient |
| Quiescent Current | ~100µA at VEN=2.0V - minimizes standby power in always-on subsystems |
Pinout & Package
AP1118D25L-13 uses the TO252-5L (DPAK) surface-mount package with exposed thermal pad. Pin 1 = Vin, Pin 2 = GND, Pin 3 = EN, Pin 4 = Vout (Tab), Pin 5 = Vout - the metal tab is electrically connected to Vout and serves as primary thermal path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Vin) | Input supply connection | Must be ≥3.9V for regulation; requires ≥100µF bulk capacitance to prevent sag during 1A load steps |
| 2 (GND) | Analog and power ground reference | Low-impedance return path for error amplifier and pass transistor; must tie to system ground plane |
| 3 (EN) | Enable/disable control input | TTL/CMOS compatible; internal 100kΩ pull-down ensures default-on if unconnected |
| 4 & 5 (Vout / Tab) | Regulated output and thermal interface | Tab is electrically Vout - PCB copper area must match Vout net and provide thermal conduction to inner layers |
Key Features
| Feature | Design Value |
|---|---|
| Fast transient response | ±40mV output deviation under 100mA–1A 10µs load step - sustains stability for FPGA I/O banks |
| Built-in thermal shutdown | Activates at TJ ≥150°C with hysteresis - prevents permanent damage during sustained overload or poor heatsinking |
| Output current limiting | 1.1A minimum trip threshold at 5V differential - protects against short-circuit faults without external components |
| Good noise rejection | 70dB @ 120Hz with 25µF tantalum output cap - isolates sensitive analog circuits from SMPS ripple |
| Lead-free and RoHS compliant | L suffix denotes lead-free plating per J-STD-609 - meets industrial and telecom environmental compliance requirements |
Applications
| PC Peripheral Power | Communication Module Supply |
|---|---|
Use Scenario: Providing clean 2.5V rail to USB 3.0 controller PHY and PCIe endpoint logic on add-in cards. IC Role / Device Role / Timing Role: Primary local LDO delivering regulated 2.5V to high-speed serial interface circuitry. Use Value: 1.4V dropout allows use of 3.9V intermediate bus, reducing heat vs. higher-dropout alternatives; fast transient response prevents link training failures. |
Use Scenario: Powering 2.5V RF front-end ICs and baseband processors in LTE small-cell radio modules. IC Role / Device Role / Timing Role: Point-of-load regulator supplying noise-sensitive analog and mixed-signal blocks. Use Value: 70dB ripple rejection suppresses switching noise from adjacent DC/DC converters, preserving EVM and receiver sensitivity. |
| VGA Card Core Logic | Industrial Sensor Interface |
Use Scenario: Generating stable 2.5V for GPU memory I/O buffers and display controller logic on legacy VGA expansion cards. IC Role / Device Role / Timing Role: Fixed-output LDO replacing older 78xx series regulators in space-constrained designs. Use Value: TO252-5L footprint enables direct replacement with lower thermal resistance than TO220, improving reliability at full load. |
Use Scenario: Supplying 2.5V reference and signal conditioning circuitry in 4–20mA loop-powered field transmitters. IC Role / Device Role / Timing Role: Low-noise, enable-controlled regulator powering precision op-amps and ADC drivers. Use Value: Enable pin allows synchronized power-up with microcontroller wake-up, minimizing startup current surges in energy-harvesting systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC29152-2.5WU | 2.5V, 1.5A, 350mV dropout, SO-8 package, no EN pin | Lacks enable function; higher cost; requires external ON/OFF control | Select when ultra-low dropout (<0.5V) is required and enable is not needed |
| TPS7A4701RGWR | 2.5V, 1A, 305mV dropout, WQFN-20, adjustable/fixable, EN pin, 4µVRMS noise | Lower noise, smaller package, but requires external feedback resistors for fixed output | Select when ultra-low noise or space-constrained PCB layout is prioritized over simplicity |
Compared with MIC29152-2.5WU and TPS7A4701RGWR, AP1118D25L-13 offers integrated enable, proven TO252 thermal performance, and simpler BOM - ideal for cost-sensitive industrial peripherals where 1.4V dropout and 70dB PSRR meet system requirements.
Availability
AP1118D25L-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 AP1118D25L-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
Anachip Corp. is a Taiwan-based semiconductor company founded in 1997, specializing in analog and mixed-signal power management ICs for consumer, computing, and industrial markets.
The AP1118 product line delivers cost-optimized, fixed-output LDOs targeting board-level voltage regulation in PC peripherals, optical drives, and graphics cards - emphasizing thermal robustness, enable control, and broad input voltage tolerance.
FAQ
What is the minimum input voltage required for AP1118D25L-13 to regulate at 2.5V?
The device requires Vin ≥ Vout + 1.4V = 3.9V to maintain regulation at full 1A load. At lighter loads, dropout decreases - e.g., ~0.2V at 10mA - but 3.9V is the guaranteed minimum for full-load operation per datasheet Section 4.
Can the EN pin be left unconnected?
Yes - the EN pin has an internal 100kΩ pull-down resistor, so leaving it open defaults the device to enabled (output active). This simplifies design when enable control is unnecessary, eliminating external pull-down components.
Is the metal tab electrically isolated in the TO252-5L package?
No - the tab is internally connected to the Vout terminal. PCB layout must route the tab to the 2.5V net and provide adequate copper area for thermal conduction; connecting it to ground or another potential will cause malfunction or damage.
How does load regulation vary across temperature for the 2.5V version?
At 800mA load, output voltage deviation due to temperature is ±0.8% from −25°C to +125°C (per Figure 8). This translates to ±20mV variation over the full operating junction range, meeting typical 2.5V logic supply tolerances.
AP1118D25L-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-252-6, DPAK (5 Leads + Tab)
- 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):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.4V @ 1A
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 10 mA
- Current - Supply (Max):
- -
- PSRR:
- 60dB (120Hz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- 0°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-252-5
AP1118D25L-13 FAQ
1.How can I place an order for AP1118D25L-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1118D25L-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 AP1118D25L-13 reliable?
The price and inventory of AP1118D25L-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1118D25L-13 is usually 5 days.
3.What payment methods are accepted for AP1118D25L-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1118D25L-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1118D25L-13?
AP1118D25L-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1118D25L-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 AP1118D25L-13?
For technical support, including AP1118D25L-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1118D25L-13 requirements.
6.How does Aetrix verify that AP1118D25L-13 is sourced from the original manufacturer or authorized distributors?
All AP1118D25L-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 AP1118D25L-13 meets industry standards.
7.What is the process for return or replacement of AP1118D25L-13?
All AP1118D25L-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1118D25L-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 AP1118D25L-13 part is unused and in its original packaging.
Return procedure for AP1118D25L-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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