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Diodes Incorporated AP1186K5-15L-13
- Part No.:
- AP1186K5-15L-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
AP1186K5-15L-13.pdf
- Description:
- IC REG LINEAR 1.5V 1.5A TO263-5
- Quantity:
- Payment:
- Shipping:
Inventory:800
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Product details
Overview
AP1186K5-15L-13 from Diodes Incorporated is a 1.5A ultra-low dropout positive fixed-mode linear regulator in TO263-5L package, delivering 1.5V output with ≤0.38V dropout at 1.5A load, built-in thermal shutdown and current limiting, designed for GPU core supply in ATX-based motherboards requiring stable 2.4–2.7V rails from 3.3V input.
For engineers reviewing the AP1186K5-15L-13 datasheet, AP1186K5-15L-13 pinout, AP1186K5-15L-13 application, or AP1186K5-15L-13 equivalent, key selection criteria include dropout voltage under full load, remote sensing capability via Vsense pin, thermal resistance (2.5°C/W junction-to-case), control pin (Vctrl) biasing requirements, and minimum load current (5–10mA) for stability.
Technical Context
The AP1186K5-15L-13 uses an NPN pass transistor architecture with externally biased Vctrl pin-separate from Vin-to achieve ultra-low dropout without PNP base-current losses. Its five-terminal topology enables true remote sensing via dedicated Vsense and Adj (GND) pins, decoupling regulation point from device output.
It operates with dual-input support: Vin supplies the pass element while Vctrl powers internal control circuitry and base drive, requiring Vctrl > Vout at all times. The fixed 1.5V output is internally trimmed to ±2% over temperature and load, with 60–70dB ripple rejection at 120Hz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.500 V ±2% at 10mA, 25°C; supports tight GPU core rail tolerance |
| Dropout Voltage (Vin−Vout) | 0.26 V (min), 0.38 V (max) at 1.5A load; enables 3.3V-to-1.5V conversion with <0.4V headroom |
| Load Regulation | 12–15 mV over 0–1.5A load; ensures stable voltage during GPU dynamic current steps |
| Thermal Resistance θJC | 2.5 °C/W (junction-to-case); requires heatsink or PCB copper area ≥1.4″×1.4″ for 1.5A continuous operation |
| Ripple Rejection | 60–70 dB at 120Hz, 1Vpp input ripple; suppresses ATX supply noise before GPU power domain |
| Control Pin Current | 6–25 mA at Vctrl = 2.75V; dictates external 5V rail sourcing capability for bias network |
| Minimum Load Current | 5–10 mA required for loop stability; mandates light-load dummy load or system bias path |
Pinout & Package
AP1186K5-15L-13 is housed in a surface-mount TO263-5L (D²PAK) package with exposed thermal pad (tab connected to Vout). Pin 1 is Vin, Pin 2 is Vsense, Pin 3 is Adj (GND), Pin 4 is Vctrl, Pin 5 is Vout. The tab serves as the Vout terminal and primary thermal path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vin (Pin 1) | Input supply for pass transistor | Must remain > Vout + dropout; connects to 3.3V ATX rail; requires ≥100µF bulk capacitor |
| Vsense (Pin 2) | Remote sense input | Connects directly to load point to compensate PCB trace IR drop; requires ≥10µF bypass to GND |
| Adj (GND) (Pin 3) | Reference ground / adjust return | Internally tied to GND in fixed mode; forms reference node for Vsense feedback loop |
| Vctrl (Pin 4) | Control circuit supply | Must be ≥ Vout + 1V (e.g., 5V rail); powers internal error amp and base drive; requires ≥100µF bypass |
| Vout (Pin 5 & Tab) | Regulated output | Delivers 1.5V @ up to 1.5A; tab is electrically connected to Vout and serves as primary thermal conduction path |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 0.26–0.38V at 1.5A enables efficient 3.3V-to-1.5V conversion without switching complexity |
| True remote sensing | Dedicated Vsense pin compensates for up to ~50mΩ PCB trace resistance between regulator and GPU die |
| Separate Vctrl biasing | Isolates control circuitry from pass transistor stress, improving reliability and transient response |
| Fast transient response | Designed for 300–500ns current steps typical of modern GPU core loads |
| Integrated protection | Thermal shutdown triggers at Tj > 150°C; current limit activates at 1.6A to prevent damage during overload |
Applications
| GPU Core Power Supply | ATX Motherboard VRM Auxiliary Rail |
|---|---|
|
Use Scenario: Providing clean, tightly regulated 1.5V supply to discrete graphics processing units on desktop motherboards using standard ATX 3.3V and 5V rails. IC Role / Device Role / Timing Role: Primary low-noise linear post-regulator delivering final core voltage after main buck converter. Use Value: Eliminates need for complex multi-phase synchronous buck design while meeting GPU transient and accuracy specs (±2%, <15mV load regulation). |
Use Scenario: Generating auxiliary 1.5V rails for memory interface buffers or PCIe switch logic on high-end ATX platforms where space and EMI constrain switching solutions. IC Role / Device Role / Timing Role: Fixed-output LDO supplying secondary logic domains with independent enable and sensing. Use Value: Leverages existing 5V/3.3V ATX rails; remote sensing maintains voltage accuracy at point-of-load despite board-level IR drop. |
| Low-Noise FPGA I/O Bank Supply | Industrial Imaging Sensor Bias |
|
Use Scenario: Powering FPGA I/O banks requiring sub-20mV load regulation and high PSRR in test equipment and protocol analyzers. IC Role / Device Role / Timing Role: Precision analog-domain LDO with remote sensing for signal integrity-critical digital interfaces. Use Value: 60–70dB ripple rejection at 120Hz suppresses switching noise from upstream DC/DC converters feeding the FPGA core. |
Use Scenario: Supplying bias voltage to CMOS image sensor analog front-ends in medical endoscopes and machine vision cameras where EMI must be minimized. IC Role / Device Role / Timing Role: Low-noise, thermally robust linear regulator operating in confined, passive-cooled enclosures. Use Value: 2.5°C/W θJC allows direct mounting to metal chassis; thermal shutdown prevents field failure during extended exposure. |
Availability
AP1186K5-15L-13 is available at Aetrix Electronics and suitable for GPU core power supply, ATX motherboard auxiliary rails, FPGA I/O bank regulation, and industrial imaging sensor bias applications requiring stable component supply and legacy-compatible packaging.
Supply support for AP1186K5-15L-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 series belongs to Diodes' ultra-low dropout linear regulator product line, engineered specifically for high-current, low-voltage GPU and ASIC core supplies where switching noise and layout complexity must be avoided.
FAQ
What is the function of the Vctrl pin on AP1186K5-15L-13?
The Vctrl pin supplies power to the internal control circuitry and base drive of the NPN pass transistor. It must be held at least 1V above Vout (e.g., 5V when Vout = 1.5V) to ensure regulation. Unlike Vin, Vctrl does not source load current-it only powers the control loop, enabling ultra-low dropout by eliminating base-current dependency on the main input rail.
Can AP1186K5-15L-13 be used in adjustable mode?
No. AP1186K5-15L-13 is a fixed 1.5V output variant. The "15" suffix denotes factory-trimmed 1.5V output; the Adj (GND) pin is internally connected to ground and not configurable. Adjustable versions use the "Adj" suffix (e.g., AP1186K5-ADJ) and require external resistor dividers between Vsense and Adj pins.
Why does AP1186K5-15L-13 require separate Vsense and Vout pins?
The separation enables true remote sensing: Vsense connects directly to the load (e.g., GPU VDDIO pad), while Vout remains at the regulator package. This compensates for voltage drop across PCB traces and connectors, maintaining ±2% regulation accuracy at the point-of-load-even with up to 50mΩ series resistance-critical for high-current digital loads.
Is AP1186K5-15L-13 still in production?
No. AP1186K5-15L-13 is marked obsolete in Diodes' official documentation (Rev. 2–4, May 2019) with "PART OBSOLETE – NO ALTERNATE PART" stated explicitly. Aetrix Electronics offers remaining inventory for legacy repair and continuity programs but does not recommend for new designs due to discontinued status and no approved second-source replacement.
AP1186K5-15L-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 1.5V
- 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
AP1186K5-15L-13 FAQ
1.How can I place an order for AP1186K5-15L-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1186K5-15L-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 AP1186K5-15L-13 reliable?
The price and inventory of AP1186K5-15L-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1186K5-15L-13 is usually 5 days.
3.What payment methods are accepted for AP1186K5-15L-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1186K5-15L-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1186K5-15L-13?
AP1186K5-15L-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1186K5-15L-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 AP1186K5-15L-13?
For technical support, including AP1186K5-15L-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1186K5-15L-13 requirements.
6.How does Aetrix verify that AP1186K5-15L-13 is sourced from the original manufacturer or authorized distributors?
All AP1186K5-15L-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 AP1186K5-15L-13 meets industry standards.
7.What is the process for return or replacement of AP1186K5-15L-13?
All AP1186K5-15L-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1186K5-15L-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 AP1186K5-15L-13 part is unused and in its original packaging.
Return procedure for AP1186K5-15L-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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