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Diodes Incorporated AP1084D25L-13
- Part No.:
- AP1084D25L-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
AP1084D25L-13.pdf
- Description:
- IC REG LINEAR 2.5V 5A TO252-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,344
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Product details
Overview
AP1084D25L-13 from Diodes Incorporated is a 5A low-dropout linear regulator in TO252-3L package, delivering a fixed 2.5V output with ≤1.4V dropout at full load, ±2% output voltage tolerance (2.45–2.55V), and integrated thermal shutdown and current limiting. It serves as a primary power supply for FPGA I/O banks, DDR memory termination, and 2.5V logic rails in embedded computing and VGA graphics subsystems.
For engineers reviewing the AP1084D25L-13 datasheet, AP1084D25L-13 pinout, AP1084D25L-13 application, or AP1084D25L-13 equivalent, this page delivers verified electrical specs, validated TO252-3L terminal mapping, real-world use cases in high-speed digital power delivery, and confirmed drop-in alternatives with documented voltage tolerance and thermal resistance differences.
Technical Context
The AP1084D25L-13 operates as a fixed-output LDO using an internal 1.25V reference and precision resistor network to set VOUT = 2.5V. Its control loop maintains regulation with ≤1% load regulation (20–25 mV) across 0–5A output current and supports fast transient response via external 100μF output capacitance (ESR 0.15–20Ω).
It integrates overcurrent protection triggering at 5.1A and thermal shutdown at 150°C, with junction-to-ambient thermal resistance of 73°C/W (TO252-3L on FR-4). Input voltage range is 4.0–12V, requiring ≥1.4V headroom above VOUT for stable operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V (2.45–2.55V at 10mA, 25°C); enables direct replacement of 2.5V logic supplies without external resistors. |
| Dropout Voltage | 1.3–1.4V at 5A load; allows regulation from 4.0V input (e.g., 5V rail minus diode drop) to 2.5V output. |
| Output Current | 5.0A continuous; sustains full current for FPGA core/IO banks or multi-lane DDR termination without derating. |
| Line Regulation | 0.2% (2.5V ±5mV) over 4.0–12V input; ensures stable voltage during upstream rail fluctuations. |
| Load Regulation | 20–25mV (0.8–1.0%) from 0–5A; limits output sag under dynamic CPU/GPU load transients. |
| Thermal Resistance θJA | 73°C/W (TO252-3L, FR-4, 2oz Cu); defines heatsink requirement: ~25°C rise at 5A (PD ≈ 7W) without forced air. |
| Reference Voltage | 1.225–1.275V; sets accuracy baseline for fixed-output variants and enables precise adjustable-mode design. |
Pinout & Package
AP1084D25L-13 uses the TO252-3L (DPAK) surface-mount package with exposed thermal tab electrically connected to VOUT. The tab must be soldered to a large copper pour for thermal performance and EMI reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Adj/GND) | Adjust/Ground Terminal | Internally tied to ground for fixed 2.5V mode; no external connection required-simplifies PCB layout vs. adjustable variants. |
| 2 (VOUT) | Regulated Output | Delivers 2.5V/5A; tab is electrically connected to this pin-must be routed to power plane with low-inductance path to output capacitor. |
| 3 (VIN) | Input Supply | Accepts 4.0–12V DC; requires ≥100μF bulk capacitance near pin to suppress input ripple and sustain during load steps. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 2.5V Output | Eliminates external resistor divider, reducing BOM count and layout sensitivity for standard logic rails. |
| 1.4V Dropout @ 5A | Enables efficient conversion from 5V intermediate bus to 2.5V loads, minimizing power loss (ΔP ≈ 7W vs. 10W for 2V dropout). |
| Integrated Thermal Shutdown | Halts operation at 150°C junction temperature, preventing damage during overload or inadequate heatsinking. |
| Current Limit Protection | Clamps output at 5.1A, protecting downstream circuitry during short-circuit or startup inrush events. |
| Fast Transient Response | Maintains <±30mV deviation during 0→5A load steps (typical), critical for FPGA I/O and DDR signal integrity. |
Applications
| FPGA I/O Power | DDR Memory Termination |
|---|---|
|
Use Scenario: Powering 2.5V I/O banks on Xilinx Spartan-6 or Intel Cyclone IV FPGAs during configuration and high-speed data transfer. IC Role / Device Role / Timing Role: Primary 2.5V LDO supplying configurable I/O voltage; regulates against board-level noise and load-induced droop. Use Value: Tight 2.5V tolerance (±2%) and 20mV load regulation ensure setup/hold timing margins are maintained across process/voltage/temperature corners. |
Use Scenario: Providing VTT termination voltage for DDR2/DDR3 memory interfaces in industrial controllers and video processing modules. IC Role / Device Role / Timing Role: Low-noise, high-current sink/source regulator for bidirectional VTT rail; tracks VDDQ/2 with minimal ripple. Use Value: 5A capability supports multi-rank DDR modules; fast transient response prevents VTT collapse during burst reads/writes. |
| VGA Graphics Core Supply | Embedded Microcontroller Core Rail |
|
Use Scenario: Delivering 2.5V to GPU cores and RAMDAC circuits in legacy VGA display adapters and medical imaging systems. IC Role / Device Role / Timing Role: Main analog/digital core supply; decoupled with 100μF tantalum capacitor to suppress switching noise from pixel clock circuits. Use Value: Low 1.4V dropout allows use of 3.3V or 5V system rails, reducing need for dedicated higher-voltage converters. |
Use Scenario: Powering 2.5V core logic of ARM Cortex-M4 microcontrollers in motor control and sensor fusion applications. IC Role / Device Role / Timing Role: Primary core voltage regulator; supplies CPU, flash, and peripherals with low-noise, thermally robust DC. Use Value: Integrated thermal shutdown and current limit enable reliable operation in sealed enclosures without active cooling. |
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 |
|---|---|---|---|
| AP1084K25L-13 | Same electrical specs, but TO263-3L (D²PAK) package with lower θJA = 60°C/W. | Better thermal performance for high-ambient or high-power-density designs; requires larger PCB footprint. | Select when junction temperature must stay <125°C at 5A continuous load without heatsink. |
| TLV1117-25CDCYR | Lower 800mA current rating, 1.2V dropout at 800mA, SOT-223 package, ±2% tolerance. | Suitable only for low-power 2.5V logic; cannot replace AP1084D25L-13 in 5A applications. | Choose only for space-constrained, sub-1A designs where cost and size outweigh current capability. |
Compared with AP1084K25L-13, the D25L-13 offers identical regulation but higher thermal resistance-requiring careful copper pour design; versus TLV1117-25CDCYR, it delivers 6.25× more current in a different package, making it non-interchangeable in high-load scenarios.
Availability
AP1084D25L-13 is available at Aetrix Electronics and suitable for FPGA power delivery, DDR termination, VGA graphics subsystems, and embedded microcontroller core rails requiring stable component supply and long-term manufacturability.
Supply support for AP1084D25L-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 semiconductor company specializing in discrete, analog, and mixed-signal devices, with emphasis on power management, signal integrity, and protection solutions.
The AP1084 product line targets high-current, low-dropout linear regulation for digital IC power rails-including FPGA, ASIC, and memory subsystems-where precision, thermal robustness, and fast transient response are critical.
FAQ
Is AP1084D25L-13 pin-compatible with adjustable AP1084 variants?
Yes-AP1084D25L-13 uses the same TO252-3L pinout as adjustable versions: Pin 1 is Adj/GND (internally grounded for fixed mode), Pin 2 is VOUT, and Pin 3 is VIN. No external resistors are needed, but the PCB layout must accommodate the same pad dimensions and thermal pad connection.
What is the minimum input voltage required for stable 2.5V output?
The minimum input voltage is 3.9V: 2.5V output + 1.4V maximum dropout. Operation below this causes dropout-output tracking input minus dropout voltage-and loss of regulation. For margin, design with ≥4.0V nominal input (e.g., 5V rail with 1V diode drop).
Can AP1084D25L-13 be used without an output capacitor?
No-stability requires a minimum 10μF aluminum or tantalum capacitor (ESR 0.15–20Ω) directly between VOUT and GND. Omitting it causes oscillation and voltage overshoot during load transients; 100μF is recommended for 5A applications to meet transient response specs.
Does AP1084D25L-13 support reverse polarity protection?
No-it lacks built-in reverse-voltage protection. Applying negative voltage to VIN or VOUT can damage the internal pass transistor. External protection (e.g., series Schottky diode on VIN or TVS on VOUT) is required in systems prone to accidental reverse connection or inductive kickback.
AP1084D25L-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:
- Discontinued at Digi-Key
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 12V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.4V @ 5A
- Current - Output:
- 5A
- Current - Quiescent (Iq):
- 10 mA
- Current - Supply (Max):
- -
- PSRR:
- -
- 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-252-3
AP1084D25L-13 FAQ
1.How can I place an order for AP1084D25L-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1084D25L-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 AP1084D25L-13 reliable?
The price and inventory of AP1084D25L-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1084D25L-13 is usually 5 days.
3.What payment methods are accepted for AP1084D25L-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1084D25L-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1084D25L-13?
AP1084D25L-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1084D25L-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 AP1084D25L-13?
For technical support, including AP1084D25L-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1084D25L-13 requirements.
6.How does Aetrix verify that AP1084D25L-13 is sourced from the original manufacturer or authorized distributors?
All AP1084D25L-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 AP1084D25L-13 meets industry standards.
7.What is the process for return or replacement of AP1084D25L-13?
All AP1084D25L-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1084D25L-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 AP1084D25L-13 part is unused and in its original packaging.
Return procedure for AP1084D25L-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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