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Diodes Incorporated AP1086T50L-U
- Part No.:
- AP1086T50L-U
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-220-3
- Datasheet:
-
AP1086T50L-U.pdf
- Description:
- IC REG LINEAR 5V 1.5A TO220-3
- Quantity:
- Payment:
- Shipping:
Inventory:156
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Product details
Overview
AP1086T50L-U from Diodes Incorporated is a fixed-output 5.0V, 1.5A low dropout linear regulator in TO220-3L package, featuring 1.4V maximum dropout at full load, ±1% output voltage tolerance at 10mA, and integrated thermal shutdown and current limiting. It delivers stable 5V supply for high-speed bus termination, VGA card power rails, and low-current 3.3V logic systems with 4.7–12V input.
For engineers reviewing the AP1086T50L-U datasheet, AP1086T50L-U pinout, AP1086T50L-U application, or AP1086T50L-U equivalent, key selection considerations include dropout voltage under 1.5A load, thermal resistance (θJA = 86°C/W), minimum 10µF output capacitance requirement, and fixed 5.0V output configuration with GND-adjustable pin unused.
Technical Context
The AP1086T50L-U operates as a three-terminal fixed-mode LDO regulator with internal reference (1.25V) and error amplifier driving a PNP pass transistor. Its architecture enables fast transient response due to low output impedance and optimized compensation requiring only a 10µF aluminum electrolytic capacitor.
It maintains regulation with VIN ≥ VOUT + 1.4V across 0–125°C junction temperature range, supports up to 15W power dissipation (limited by θJA and ambient conditions), and guarantees load regulation ≤33mV over 0–1.5A at 5V output with 8V input.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.000 V ±2% (4.90–5.10 V) at 10mA, 25°C - ensures compatibility with TTL/CMOS 5V logic interfaces. |
| Maximum Dropout Voltage | 1.4 V at 1.5A load - enables operation from 6.4V minimum input, critical for 7–12V industrial supply rails. |
| Output Current | 1.5 A continuous - sufficient for powering multiple ICs on VGA cards or bus termination networks. |
| Line Regulation | ≤0.2% over VIN = VOUT+1.5V to 12V - minimizes output drift during input rail fluctuations. |
| Load Regulation | ≤33 mV from 0 to 1.5A at 5V - maintains tight voltage stability across dynamic load steps. |
| Ripple Rejection | 60–70 dB at 120 Hz - suppresses low-frequency noise from upstream switching supplies. |
| Thermal Resistance θJA | 86 °C/W (TO220-3L, no heatsink, no airflow) - defines maximum power dissipation before thermal shutdown. |
Pinout & Package
AP1086T50L-U uses TO220-3L package with exposed tab electrically connected to VOUT for enhanced thermal conduction. Mounting requires insulating hardware if heatsink is grounded.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Adj/GND) | Ground reference (fixed mode only) | Internally tied to GND for fixed 5.0V output; not adjustable - must be connected to system ground. |
| 2 (VOUT) | Regulated output | Delivers 5.0V; tab is electrically connected to this pin - requires ≥10µF output capacitor to ground for stability. |
| 3 (VIN) | Input supply | Accepts 6.5–12V DC; must remain ≥1.4V above VOUT to sustain regulation - decoupling capacitor required. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 5.0V output configuration | Eliminates external resistor divider, reducing BOM count and layout area for dedicated 5V rails. |
| Built-in thermal shutdown | Activates at 150°C junction temperature - prevents catastrophic failure during overload or poor heatsinking. |
| Current limiting protection | 1.6A typical trip threshold - safeguards against short-circuit events without external sensing components. |
| Lead-free and RoHS-compliant | Meets EU Directive 2002/95/EC with green molding compound (no Br/Sb) - supports environmental compliance programs. |
| Fast transient response | ≤100µs recovery from 0→1.5A load step - maintains voltage within ±50mV window for sensitive digital loads. |
Applications
| VGA Graphics Card Power | Industrial Bus Termination |
|---|---|
|
Use Scenario: Providing clean 5V bias to RS-485/RS-422 termination resistors and transceiver I/O buffers on embedded motion control modules. IC Role / Device Role / Timing Role: Fixed 5V LDO regulator supplying stable termination voltage independent of main 12V rail sag. Use Value: 1.4V dropout enables use with 7V intermediate rail; 33mV load regulation prevents signal integrity degradation during bus arbitration bursts. |
Use Scenario: Delivering regulated 5V to analog front-end circuitry and GPU memory interface on legacy VGA add-in cards. IC Role / Device Role / Timing Role: Primary 5V power source for video DACs, timing controllers, and display memory chips. Use Value: 60–70dB ripple rejection suppresses switching noise from adjacent DC/DC converters; TO220 package allows direct heatsink mounting. |
| Low-Power Logic Supply | Embedded Controller Auxiliary Rail |
|
Use Scenario: Powering 5V-tolerant microcontroller peripherals including UART transceivers and GPIO expanders in factory automation gateways. IC Role / Device Role / Timing Role: Secondary regulated rail decoupled from noisy main 12V supply to reduce EMI coupling into serial interfaces. Use Value: 0.2% line regulation ensures consistent logic levels despite input variations from aging AC/DC adapters. |
Use Scenario: Generating isolated 5V for watchdog timers, real-time clocks, and secure boot circuitry in medical device mainboards. IC Role / Device Role / Timing Role: Always-on auxiliary regulator maintaining timekeeping and safety monitoring functions during main processor sleep cycles. Use Value: Thermal shutdown and current limit enable safe operation during brown-out conditions where input voltage collapses slowly. |
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 |
|---|---|---|---|
| LM2940CT-5.0/NOPB | 500mA output, 0.5V dropout at 500mA, higher quiescent current (10mA vs. 5mA typical) | Limited to lower-power peripherals; unsuitable for 1.5A VGA card loads | Select when board space constraints favor TO220-3 but load current ≤500mA |
| TLV1117-50CDCYR | 800mA output, SOT-223 package, 1.2V dropout at 800mA, no thermal shutdown flag | Requires PCB-level thermal management; lacks built-in fault reporting | Choose for cost-sensitive consumer designs where 800mA suffices and footprint is constrained |
Compared with LM2940CT-5.0/NOPB and TLV1117-50CDCYR, AP1086T50L-U uniquely supports 1.5A continuous output in TO220-3L with guaranteed 1.4V dropout and integrated thermal protection-making it the only option among the three suitable for high-current VGA and industrial bus applications.
Availability
AP1086T50L-U is available at Aetrix Electronics and suitable for VGA graphics card manufacturing, industrial bus termination modules, and embedded controller auxiliary rail designs requiring stable component supply with long-term lifecycle support.
Supply support for AP1086T50L-U 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 devices for industrial, computing, and consumer markets.
The AP1086 series belongs to Diodes' low-dropout linear regulator product line, engineered specifically for high-current, low-noise voltage regulation in space-constrained and thermally demanding applications like graphics subsystems and bus infrastructure.
FAQ
What is the minimum input voltage required for AP1086T50L-U to regulate 5.0V output?
The AP1086T50L-U requires VIN ≥ VOUT + 1.4V to maintain regulation, so minimum input is 6.4V. At 1.5A load, dropout may reach 1.4V; operation below 6.4V causes output collapse. Input must also meet datasheet's 6.5V minimum specification for 5.0V fixed mode.
Can AP1086T50L-U be used in adjustable mode?
No. AP1086T50L-U is factory-masked for fixed 5.0V output. Pin 1 (Adj/GND) is internally connected to ground and cannot be reconfigured. For adjustable operation, select AP1086TADJ-U or AP1086KADJ-L-13 with external resistor divider.
Is a heatsink mandatory for AP1086T50L-U at 1.5A output?
Yes, under typical ambient conditions. With θJA = 86°C/W and power dissipation up to 9W (e.g., 12V→5V @1.5A), junction temperature exceeds 150°C without heatsinking. A 10°C/W heatsink reduces θJA to ~20°C/W, enabling safe continuous operation.
What output capacitor is required for stability?
A minimum 10µF aluminum electrolytic capacitor must be placed between VOUT and GND, located within 10mm of the package. Tantalum or polymer capacitors ≥25µF may improve transient response; ceramic capacitors alone are insufficient due to ESR requirements.
AP1086T50L-U Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 12V
- Voltage - Output (Min/Fixed):
- 5V
- 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:
- Through Hole
- Supplier Device Package:
- TO-220-3
AP1086T50L-U FAQ
1.How can I place an order for AP1086T50L-U through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1086T50L-U 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 AP1086T50L-U reliable?
The price and inventory of AP1086T50L-U are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1086T50L-U is usually 5 days.
3.What payment methods are accepted for AP1086T50L-U?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1086T50L-U transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1086T50L-U?
AP1086T50L-U orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1086T50L-U 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 AP1086T50L-U?
For technical support, including AP1086T50L-U datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1086T50L-U requirements.
6.How does Aetrix verify that AP1086T50L-U is sourced from the original manufacturer or authorized distributors?
All AP1086T50L-U 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 AP1086T50L-U meets industry standards.
7.What is the process for return or replacement of AP1086T50L-U?
All AP1086T50L-U units undergo pre-shipment inspection (PSI). If there is an issue with AP1086T50L-U, 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 AP1086T50L-U part is unused and in its original packaging.
Return procedure for AP1086T50L-U:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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