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Diodes Incorporated AP1086K33L-13
- Part No.:
- AP1086K33L-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
AP1086K33L-13.pdf
- Description:
- IC REG LINEAR 3.3V 1.5A TO263-2
- Quantity:
- Payment:
- Shipping:
Inventory:2,476
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Product details
Overview
AP1086K33L-13 from Diodes Incorporated is a 1.5A low dropout (LDO) positive fixed-mode voltage regulator delivering a precise 3.3V output with ≤1.4V dropout at full load, thermal shutdown, and current limiting. It uses TO263-3L package with VOUT-connected tab, supports 4.8–12V input, and targets high-speed bus termination and 3.3V logic supply in VGA cards and embedded systems.
For engineers reviewing the AP1086K33L-13 datasheet, AP1086K33L-13 pinout, AP1086K33L-13 application, or AP1086K33L-13 equivalent, key selection criteria include dropout voltage under 1.4V at 1.5A, ±1% load regulation over 0–1.5A, RMS noise of 0.003% of VOUT, thermal resistance θJC = 0.65/2.7°C/W (control/power transistor), and mandatory 10µF output capacitor for stability.
Technical Context
The AP1086K33L-13 integrates a precision 1.25V reference, error amplifier, and PNP pass transistor in a fixed 3.3V configuration-no external resistors required. Its feedback loop is internally trimmed to deliver 3.235–3.365V across temperature and load, with fast transient response enabled by internal compensation optimized for ≥10µF tantalum or aluminum electrolytic output capacitance.
Thermal protection activates at 150°C junction temperature, and current limiting engages at ≥1.6A when VIN–VOUT = 5V. The device operates within 0–125°C junction range and requires VIN ≥ VOUT + 1.4V at full load to maintain regulation-making it suitable for 5V-to-3.3V conversion with margin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3V nominal, ±2% tolerance (3.235–3.365V) at 10mA, ensuring compatibility with 3.3V logic I/O standards |
| Dropout Voltage | ≤1.4V at 1.5A load, enabling stable 3.3V output from as low as 4.7V input supply |
| Load Regulation | ≤33mV over 0–1.5A load (at VIN=5V), minimizing voltage sag during CPU/GPU burst currents |
| Ripple Rejection | 60–70dB at 120Hz, suppressing input supply noise from switching regulators or noisy DC-DC stages |
| RMS Output Noise | 0.003% of VOUT (≈100µV RMS over 10Hz–10kHz), critical for analog-sensitive peripherals |
| Thermal Resistance θJC | 0.65°C/W (control circuitry) / 2.7°C/W (power transistor), guiding heatsink sizing for continuous 1.5A operation |
| Minimum Load Current | 5–10mA required to maintain regulation, dictating use of light-load biasing in standby modes |
Pinout & Package
AP1086K33L-13 uses the TO263-3L surface-mount package with exposed metal tab electrically connected to VOUT for enhanced thermal conduction and PCB copper area utilization.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Adj/GND) | Ground reference (fixed mode only) | Internally tied to GND for 3.3V fixed operation; no external connection needed beyond PCB ground plane |
| 2 (VOUT) | Regulated output | Delivers 3.3V; connects directly to load and ≥10µF output capacitor; tab is electrically bonded to this pin |
| 3 (VIN) | Input supply | Accepts 4.8–12V; must remain ≥4.7V under worst-case load transients to avoid dropout |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 3.3V output with internal trimming | Eliminates external resistor network, reducing BOM count and layout sensitivity in space-constrained designs |
| 1.4V max dropout at 1.5A | Enables efficient 5V-to-3.3V conversion without requiring higher input rails, lowering system power loss |
| Built-in thermal shutdown | Protects against sustained overload or inadequate heatsinking by disabling output above 150°C junction temperature |
| Current limiting at ≥1.6A | Prevents catastrophic failure during short-circuit events while allowing safe restart after fault clearance |
| Lead-free, RoHS-compliant TO263-3L | Meets EU Directive 2002/95/EC with green molding compound (Br/Sb-free), supporting environmental compliance programs |
Applications
| High-Speed Bus Termination | VGA Card Power Supply |
|---|---|
Use Scenario: Providing clean, low-noise 3.3V termination voltage for DDR memory buses or PCI Express lanes on motherboard or add-in cards. IC Role / Device Role / Timing Role: Fixed-output LDO regulator supplying stable termination voltage referenced to VTT rail, maintaining signal integrity during high-frequency data bursts. Use Value: 0.003% RMS noise and 60–70dB ripple rejection prevent jitter accumulation in timing-sensitive interfaces, reducing bit error rates. | Use Scenario: Delivering regulated 3.3V to GPU core logic, display interface circuitry, and video DACs on discrete graphics cards. IC Role / Device Role / Timing Role: Primary point-of-load regulator converting 5V or 12V system rail to 3.3V domain, supporting dynamic load steps up to 1.5A. Use Value: ≤33mV load regulation ensures consistent logic levels across GPU clock domains, preventing timing violations during frame rendering. |
| Low-Current 3.3V Logic Supply | Industrial Embedded Controller Core Rail |
Use Scenario: Powering microcontroller I/O banks, FPGA configuration circuits, or sensor interface ICs in portable or battery-backed systems. IC Role / Device Role / Timing Role: Fixed-voltage LDO providing isolated, low-noise 3.3V rail decoupled from noisy system supplies, with minimal quiescent current impact. Use Value: 5–10mA minimum load requirement allows direct connection to CMOS logic without pull-up resistors, simplifying power tree design. | Use Scenario: Supplying core voltage to ARM Cortex-M or RISC-V microcontrollers in programmable logic controllers (PLCs) or motor drive HMI modules. IC Role / Device Role / Timing Role: Main 3.3V supply for MCU core and peripherals, operating continuously across –40°C to +85°C ambient with thermal shutdown backup. Use Value: 0–125°C junction rating and 150°C thermal shutdown enable reliable operation in unventilated 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 |
|---|---|---|---|
| AP1117K33L-13 | 1A output current, 1.3V dropout at full load, TO263-3L package, same 3.3V fixed output | Lower current capability limits use in >1A load scenarios such as GPU I/O or multi-lane bus termination | Select when thermal budget is constrained and peak load remains ≤1A; reduces power dissipation by ~33% |
| LD1117S33TR | 800mA output, 1.1V dropout at full load, SOT-223 package, 3.3V fixed output | Smaller footprint but lower thermal mass and current capacity; unsuitable for sustained 1.5A loads | Choose for space-constrained consumer electronics where load rarely exceeds 800mA and board area is premium |
Compared with AP1117K33L-13 and LD1117S33TR, AP1086K33L-13 delivers 50% higher output current and superior thermal performance via TO263-3L's low θJC, making it the only option capable of continuous 1.5A regulation in industrial ambient temperatures without derating.
Availability
AP1086K33L-13 is available at Aetrix Electronics and suitable for high-speed bus termination, VGA card power delivery, and industrial embedded controller core rails requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AP1086K33L-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 power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
The AP1086 product line delivers high-current, low-dropout linear regulators optimized for point-of-load voltage conversion in space- and thermally-constrained applications where switching noise is unacceptable.
FAQ
What is the minimum input voltage required for AP1086K33L-13 to regulate at full 1.5A load?
The device requires VIN ≥ VOUT + 1.4V to maintain regulation at full load. For its 3.3V output, minimum input is 4.7V. Below this, dropout occurs and output voltage drops linearly with input-verified per Electrical Characteristics table (DS31028 Rev. 6-2, p.3).
Can AP1086K33L-13 be used without an output capacitor?
No. A minimum 10µF aluminum or tantalum capacitor is mandatory between VOUT and GND for stability and transient response, as stated in Pin Descriptions (p.2) and Functional Description (p.4). Omitting it causes oscillation and potential device failure.
Is the tab on the TO263-3L package electrically connected, and to which pin?
Yes-the exposed metal tab is electrically connected to Pin 2 (VOUT), as confirmed in Pin Assignments (p.1) and Package Outline Dimensions (p.8). This enables direct thermal coupling to PCB copper pour for heat dissipation.
Does AP1086K33L-13 support adjustable output configurations?
No. The "K33" suffix denotes fixed 3.3V output. Adjustable versions use "K" alone (e.g., AP1086KL-13) with external resistor divider on the Adj pin. This part has internal feedback and no Adj functionality-confirmed in Ordering Information (p.6).
AP1086K33L-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 12V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.4V @ 1.5A
- Current - Output:
- 1.5A
- Current - Quiescent (Iq):
- 10 mA
- Current - Supply (Max):
- -
- PSRR:
- 60dB (120Hz)
- 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-263
AP1086K33L-13 FAQ
1.How can I place an order for AP1086K33L-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1086K33L-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 AP1086K33L-13 reliable?
The price and inventory of AP1086K33L-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1086K33L-13 is usually 5 days.
3.What payment methods are accepted for AP1086K33L-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1086K33L-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1086K33L-13?
AP1086K33L-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1086K33L-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 AP1086K33L-13?
For technical support, including AP1086K33L-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1086K33L-13 requirements.
6.How does Aetrix verify that AP1086K33L-13 is sourced from the original manufacturer or authorized distributors?
All AP1086K33L-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 AP1086K33L-13 meets industry standards.
7.What is the process for return or replacement of AP1086K33L-13?
All AP1086K33L-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1086K33L-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 AP1086K33L-13 part is unused and in its original packaging.
Return procedure for AP1086K33L-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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