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Diodes Incorporated AP1186K5-18L-13
- Part No.:
- AP1186K5-18L-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
AP1186K5-18L-13.pdf
- Description:
- IC REG LINEAR 1.8V 1.5A TO263-5
- Quantity:
- Payment:
- Shipping:
Inventory:714
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Product details
Overview
AP1186K5-18L-13 from Diodes Incorporated is a 1.5A ultra-low dropout positive fixed-mode linear regulator delivering 1.8V output with ≤0.38V dropout at 1.5A load, built-in thermal shutdown and current limiting, and remote sensing via separate Vsense pin-designed for GPU core power in ATX-based graphics cards requiring stable 2.4–2.7V supplies.
For engineers reviewing the AP1186K5-18L-13 datasheet, AP1186K5-18L-13 pinout, AP1186K5-18L-13 application, or AP1186K5-18L-13 equivalent, key selection criteria include dropout voltage under full load, remote sense capability for load regulation, thermal shutdown behavior, and TO263-5L package thermal resistance (θJC = 2.5°C/W).
Technical Context
The AP1186K5-18L-13 uses an NPN pass transistor architecture with externally supplied Vctrl pin (≥Vout + 1V), enabling sub-0.4V dropout while avoiding base-current losses typical of PNP regulators. It implements true remote sensing by comparing Vsense to Adj (GND) to maintain regulation at the load point.
Its control loop is stabilized by ≥100µF output capacitance with 50–100mΩ ESR, and it delivers fast transient response (<500ns current step handling) required by modern GPU cores. The device operates across 0–150°C junction temperature with internal thermal shutdown activation above 150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.800 V ±1.2% at 10mA, 25°C; tight tolerance supports GPU core voltage compliance. |
| Dropout Voltage (Vin−Vout) | 0.26 V (min) / 0.38 V (max) at 1.5A load; enables efficient 3.3V-to-1.8V conversion without switching complexity. |
| Load Regulation | 15–18 mV over 0–1.5A load range at VIN = 3.3V; low drift ensures stable rail during GPU dynamic current draw. |
| Thermal Resistance θJC | 2.5 °C/W (junction-to-case); enables direct heatsinking via TO263 tab for sustained 1.5A operation. |
| Remote Sense Capability | Dedicated Vsense pin with ≥10µF capacitor to ground; compensates for PCB trace IR drop to maintain accuracy at load. |
| Control Pin (Vctrl) | Requires ≥Vout + 1V supply (e.g., 5V rail); decouples base drive from input, reducing dropout and improving efficiency. |
| Current Limit Threshold | 1.6 A minimum; protects against short-circuit faults while supporting GPU peak current demands. |
Pinout & Package
AP1186K5-18L-13 is housed in a surface-mount TO263-5L package with exposed thermal pad (tab connected to Vout). The package supports high-power dissipation with θJC = 2.5°C/W and requires Diodes Inc. recommended pad layout AP02001.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vout | Regulated output terminal | Connected to internal NPN collector and exposed tab; must be tied to heatsink for thermal management. |
| Vsense | Remote output voltage sense input | Monitors voltage at load; enables compensation for PCB trace resistance up to ~50mΩ. |
| Adj (GND) | Reference ground / adjust node | Ground reference for internal 1.25V bandgap; tied directly to GND in fixed-output mode (K5-18). |
| Vctrl | Internal circuit & pass transistor base drive supply | Must be ≥Vout + 1V (e.g., 5V rail); isolates control bias from input, minimizing dropout. |
| Vin | Main input supply terminal | Accepts 2.3–12V input; requires ≥100µF bulk capacitor to prevent sag during GPU load transients. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 0.26 V min at 1.5A enables 3.3V-to-1.8V conversion with >45% efficiency vs. standard LDOs. |
| True remote sensing | Separate Vsense and Vout pins maintain ±1.2% output accuracy at GPU die despite 100+ mV PCB drop. |
| Fast transient response | Supports 300–500 ns current steps typical of GPU core switching, reducing required output capacitance. |
| Integrated protection | Thermal shutdown (>150°C) and current limiting (1.6A) prevent damage during overload or poor heatsinking. |
| Lead-free & RoHS compliant | L-suffix confirms exemption-compliant lead-free finish per EU Directive Annex Notes 5 & 7 (2003). |
Applications
| GPU Core Power Supply | ATX Motherboard Auxiliary Rail |
|---|---|
|
Use Scenario: Providing clean, tightly regulated 1.8V supply to discrete graphics processing units on PCIe add-in cards. IC Role / Device Role / Timing Role: Primary linear regulator delivering stable core voltage with remote sensing at GPU VRM input. Use Value: Eliminates need for complex switching solution while meeting GPU transient response and ±1.2% voltage tolerance specs. |
Use Scenario: Generating auxiliary low-voltage rails (e.g., 1.8V/2.5V) from 3.3V or 5V ATX main rails on desktop motherboard PCBs. IC Role / Device Role / Timing Role: Fixed-output LDO supplying secondary logic or interface circuitry with minimal BOM count. Use Value: Leverages existing ATX dual-rail architecture (3.3V + 5V) to achieve ultra-low dropout without external controllers. |
| Industrial FPGA I/O Bank | Embedded Vision Sensor Interface |
|
Use Scenario: Powering configurable I/O banks of Xilinx or Intel FPGAs requiring precise 1.8V with low noise and high PSRR. IC Role / Device Role / Timing Role: Low-noise, high-PSRR (70 dB @ 120 Hz) linear regulator for FPGA I/O supply domain. Use Value: Delivers clean rail with <18 mV load regulation across full current range, preventing I/O timing violations. |
Use Scenario: Supplying image sensor interfaces (e.g., MIPI CSI-2 PHY, LVDS serializers) demanding stable 1.8V with fast transient recovery. IC Role / Device Role / Timing Role: Fast-response LDO ensuring pixel clock stability and minimizing sensor frame jitter. Use Value: 500 ns transient capability prevents frame corruption during burst-mode sensor readout transitions. |
Availability
AP1186K5-18L-13 is available at Aetrix Electronics and suitable for GPU core power supplies, ATX motherboard auxiliary rails, and industrial FPGA I/O banks requiring stable component supply with known thermal performance and remote sensing capability.
Supply support for AP1186K5-18L-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-performance power management, signal integrity, and protection solutions for computing, industrial, and consumer markets.
The AP1186 product line was designed specifically for ultra-low-dropout, high-current linear regulation in graphics and computing applications where switching noise or complexity is unacceptable-targeting GPU core, FPGA I/O, and ATX auxiliary rail use cases.
FAQ
What is the required input voltage range for AP1186K5-18L-13?
The AP1186K5-18L-13 requires an input voltage between 2.3 V and 12 V, with minimum headroom of 0.38 V above 1.8 V output at full 1.5 A load. For reliable operation with margin, 3.3 V input is typical when using ATX 3.3 V rail, and Vctrl must be ≥2.8 V (e.g., 5 V rail) per datasheet specification.
Can AP1186K5-18L-13 be used without remote sensing?
Yes - the Vsense pin can be connected directly to Vout for local regulation, but doing so forfeits remote sensing benefits. Stability still requires ≥10 µF capacitor from Vsense to GND, and load regulation degrades to ±15–18 mV across 0–1.5 A due to PCB trace resistance effects.
What thermal management is required for continuous 1.5 A operation?
At 1.5 A with 3.3 V input and 1.8 V output, power dissipation is ~1.68 W. With θJC = 2.5 °C/W and assuming 25 °C ambient, a minimum copper area of 1.4" × 1.4" (per Diodes AP02001) is required to keep junction temperature below 135 °C; forced air or external heatsink further improves margin.
Is AP1186K5-18L-13 still in active production?
No - AP1186K5-18L-13 is marked obsolete by Diodes Incorporated with no recommended alternate part. Aetrix Electronics offers remaining factory-stock inventory with full traceability, intended for legacy system repair, end-of-life production, or design continuity where redesign is not feasible.
AP1186K5-18L-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.38V @ 1.5A
- Current - Output:
- 1.5A
- Current - Quiescent (Iq):
- 10 mA
- Current - Supply (Max):
- 150 µA
- PSRR:
- 70dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- 0°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263-5
AP1186K5-18L-13 FAQ
1.How can I place an order for AP1186K5-18L-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1186K5-18L-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 AP1186K5-18L-13 reliable?
The price and inventory of AP1186K5-18L-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1186K5-18L-13 is usually 5 days.
3.What payment methods are accepted for AP1186K5-18L-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1186K5-18L-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1186K5-18L-13?
AP1186K5-18L-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1186K5-18L-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 AP1186K5-18L-13?
For technical support, including AP1186K5-18L-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1186K5-18L-13 requirements.
6.How does Aetrix verify that AP1186K5-18L-13 is sourced from the original manufacturer or authorized distributors?
All AP1186K5-18L-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 AP1186K5-18L-13 meets industry standards.
7.What is the process for return or replacement of AP1186K5-18L-13?
All AP1186K5-18L-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1186K5-18L-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 AP1186K5-18L-13 part is unused and in its original packaging.
Return procedure for AP1186K5-18L-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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