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Diodes Incorporated AP1186K5-50L-13
- Part No.:
- AP1186K5-50L-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
AP1186K5-50L-13.pdf
- Description:
- IC REG LINEAR 5V 1.5A TO263-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,270
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Product details
Overview
AP1186K5-50L-13 from Diodes Incorporated is a 1.5A ultra-low dropout positive fixed-mode linear regulator in TO263-5L package, delivering a stable 5.0V output with ≤0.38V dropout at 1.5A load, 40–50mV load regulation, and 60–70dB ripple rejection - engineered for GPU core supply and ATX-based motherboard voltage regulation where tight transient response and remote sensing are required.
For engineers reviewing the AP1186K5-50L-13 datasheet, AP1186K5-50L-13 pinout, AP1186K5-50L-13 application, or AP1186K5-50L-13 equivalent, this part supports high-accuracy remote-sensed 5V/1.5A delivery with separate Vout/Vsense pins, thermal shutdown, current limiting, and fast transient recovery - critical for graphics processor power rails and low-noise embedded subsystems.
Technical Context
The AP1186K5-50L-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. Its five-terminal topology separates output (Vout) and sense (Vsense) paths to support true remote voltage regulation at the load.
It integrates internal current limiting (1.6A min), thermal shutdown (TJ > 150°C), and requires ≥100µF output capacitance for stability. The fixed 5.0V version eliminates external resistor networks, simplifying layout while retaining full remote sensing capability via dedicated Vsense and Adj(GND) terminals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±2% (4.90–5.10V), verified at 10mA–1.5A load and 25°C. |
| Dropout Voltage (Vin–Vout) | 0.26V (typ), 0.38V (max) at 1.5A - enables 5V output from 5.38V input with margin. |
| Load Regulation | 40–50mV over 0–1.5A - ensures <1% output deviation across full load range. |
| Ripple Rejection | 60–70dB at 120Hz - suppresses switching noise from upstream ATX supplies. |
| Thermal Resistance θJC | 2.5°C/W (TO263-5L) - supports ≥1.6W dissipation with minimal heatsink area. |
| Control Pin (Vctrl) | Must be ≥Vout + 1V (e.g., 6V min for 5V output) - powers internal circuitry and base drive. |
| Remote Sensing | Dedicated Vsense pin - compensates for PCB trace IR drop up to ~100mΩ. |
Pinout & Package
AP1186K5-50L-13 is housed in a surface-mount TO263-5L (D²PAK) package with exposed tab electrically connected to Vout for thermal conduction and low-inductance output return.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vout | Output terminal | Main regulated 5.0V power output; tab-connected for thermal path and low-impedance return. |
| Vsense | Sense input | Feedback node for remote sensing - connects directly to load to compensate trace resistance. |
| Adj (GND) | Reference ground | Ground reference for internal 1.25V bandgap; tied to GND in fixed-voltage mode. |
| Vctrl | Control supply | Power source for internal bias and NPN base drive - must exceed Vout by ≥1V. |
| Vin | Input terminal | Primary input (e.g., 5.5–12V); requires ≥100µF bulk capacitor to sustain during transients. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 0.38V max at 1.5A - enables efficient 5V rail generation from marginal input sources like 5.38V ATX rails. |
| True remote sensing | Dedicated Vsense pin with independent routing - maintains ±1% accuracy at point-of-load despite PCB IR drop. |
| Fast transient response | Designed for 300–500ns current steps (e.g., GPU core switching) - reduces required output capacitance. |
| Integrated protection | Thermal shutdown (TJ > 150°C) and current limiting (1.6A min) - prevents damage under overload or poor heatsinking. |
| Low-noise operation | 70dB ripple rejection at 120Hz - isolates sensitive analog/digital loads from switcher-induced noise. |
Applications
| GPU Core Power Supply | ATX Motherboard Auxiliary Rail |
|---|---|
|
Use Scenario: Delivering tightly regulated 5.0V/1.5A to discrete graphics processor memory interfaces with nanosecond-scale current transients. IC Role / Device Role / Timing Role: Primary low-dropout post-regulator providing remote-sensed voltage to GDDR memory VDDQ rails. Use Value: Maintains <±1% output accuracy under 1.5A step loads via Vsense feedback, reducing need for oversized bulk capacitors. |
Use Scenario: Generating clean 5.0V auxiliary power for PCIe slot logic, SMBus controllers, or fan controllers on ATX motherboards. IC Role / Device Role / Timing Role: Fixed-output LDO supplying isolated, low-noise 5V from main ATX 5V rail with ripple suppression. Use Value: 70dB ripple rejection eliminates need for additional LC filtering, saving board space and BOM cost. |
| Industrial FPGA I/O Bank | Medical Imaging Sensor Interface |
|
Use Scenario: Powering FPGA I/O banks requiring precise 5.0V with minimal voltage droop during configuration or high-speed data transfer. IC Role / Device Role / Timing Role: Stable local regulator with remote sensing to counteract voltage drop across backplane connectors. Use Value: 40mV load regulation ensures I/O timing margins remain intact across temperature and load variations. |
Use Scenario: Supplying analog front-end sensors in portable ultrasound or X-ray detectors where EMI-sensitive signal integrity is critical. IC Role / Device Role / Timing Role: Low-noise, thermally robust 5V source decoupled from noisy digital subsystems via dedicated Vctrl and Vsense. Use Value: Separated Vctrl pin allows clean 6V bias from isolated supply, eliminating coupling paths into analog signal chain. |
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 |
|---|---|---|---|
| AP1186T5-50L-U | Same die, TO220-5L through-hole package; θJC = 2.5°C/W but higher θJA due to leadframe thermal path. | Preferred for prototyping, manual assembly, or legacy through-hole designs with heatsink mounting flexibility. | Select when mechanical mounting constraints favor through-hole or when thermal interface to chassis is more accessible than PCB copper area. |
| TLV1117-50CDCYR | 1A max output, 1.2V dropout at 1A, no Vctrl or Vsense pins - single-input, no remote sensing capability. | Suitable for non-critical 5V rails without dynamic load or precision remote regulation requirements. | Choose only if load current ≤1A, remote sensing is unnecessary, and board space permits larger output capacitance for stability. |
Compared with AP1186K5-50L-13, the TO220 variant offers identical electrical performance with different mechanical integration, while TLV1117-50CDCYR sacrifices 0.5A current capacity, remote sensing, and ultra-low dropout to reduce cost and complexity - making it unsuitable for GPU or high-transient industrial use cases.
Availability
AP1186K5-50L-13 is available at Aetrix Electronics and suitable for GPU core power supply, ATX motherboard auxiliary rails, and industrial FPGA I/O bank regulation requiring stable component supply, RoHS-compliant packaging, and long-term lifecycle continuity.
Supply support for AP1186K5-50L-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 computing, industrial, and automotive markets.
The AP1186 product line delivers ultra-low dropout linear regulators with remote sensing and dual-supply control architecture - designed specifically for high-transient, high-accuracy applications in graphics subsystems and ATX-compliant computing platforms.
FAQ
What is the minimum required Vctrl voltage for AP1186K5-50L-13?
The Vctrl pin must be at least 1V higher than the output voltage (i.e., ≥6.0V for 5.0V output) to ensure proper internal biasing and NPN base drive. Operation below this threshold causes regulation failure and uncontrolled dropout. A 6.0–12V range is recommended, with ≥100µF capacitor from Vctrl to ground for stability.
Can AP1186K5-50L-13 be used without remote sensing?
Yes - connect Vsense directly to Vout on the device side (not at the load) to disable remote sensing. In this configuration, regulation accuracy depends on PCB trace resistance between the regulator and load, and load regulation degrades to typical 40–50mV across 0–1.5A. Remote sensing remains optional but strongly recommended for precision applications.
Is AP1186K5-50L-13 compatible with ceramic output capacitors?
No - the AP1186K5-50L-13 requires aluminum or tantalum electrolytic capacitors with 50–100mΩ ESR for loop stability. Ceramic capacitors (ESR <10mΩ) cause phase-margin loss and potential oscillation. Minimum 100µF output capacitance is mandatory, and ESR must fall within the 50–100mΩ range per datasheet Section 6 (Stability).
How does thermal shutdown activate and recover?
Internal thermal shutdown triggers when junction temperature exceeds 150°C, disabling output until TJ drops below ~140°C (typical hysteresis). Recovery is automatic and does not require reset or power cycle. During sustained overload, the device cycles on/off - design must ensure adequate copper area (≥1.4"×1.4" for TO263) or heatsinking to avoid repeated tripping under 1.5A continuous load.
AP1186K5-50L-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:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 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
AP1186K5-50L-13 FAQ
1.How can I place an order for AP1186K5-50L-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1186K5-50L-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 AP1186K5-50L-13 reliable?
The price and inventory of AP1186K5-50L-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1186K5-50L-13 is usually 5 days.
3.What payment methods are accepted for AP1186K5-50L-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1186K5-50L-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1186K5-50L-13?
AP1186K5-50L-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1186K5-50L-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 AP1186K5-50L-13?
For technical support, including AP1186K5-50L-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1186K5-50L-13 requirements.
6.How does Aetrix verify that AP1186K5-50L-13 is sourced from the original manufacturer or authorized distributors?
All AP1186K5-50L-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 AP1186K5-50L-13 meets industry standards.
7.What is the process for return or replacement of AP1186K5-50L-13?
All AP1186K5-50L-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1186K5-50L-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 AP1186K5-50L-13 part is unused and in its original packaging.
Return procedure for AP1186K5-50L-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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