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Diodes Incorporated AP1086TG-U
- Part No.:
- AP1086TG-U
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-220-3
- Datasheet:
-
AP1086TG-U.pdf
- Description:
- IC REG LIN POS ADJ 1.5A TO220-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,926
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Product details
Overview
AP1086TG-U from Diodes Incorporated is a 1.5A low dropout (LDO) positive voltage regulator in TO220-3L package, configurable as adjustable or fixed-output (3.3V), with 1.4V max dropout at full load, ±1% load regulation at 1.5A, and integrated thermal shutdown. It delivers stable 3.3V/1.5A output from 4.8–12V input for high-speed bus termination and VGA card power rails.
For engineers reviewing the AP1086TG-U datasheet, AP1086TG-U pinout, AP1086TG-U application, or AP1086TG-U equivalent, key selection criteria include dropout voltage under 1.4V at 1.5A, guaranteed 3.3V output tolerance (±1.0% at 10mA, ±1.0% load regulation), thermal resistance θJA = 86°C/W (TO220-3L), and mandatory 10µF output capacitance for stability.
Technical Context
The AP1086TG-U implements a fixed 3.3V output LDO architecture using an internal bandgap reference (1.25V) and error amplifier driving a PNP pass transistor. Dropout is maintained below 1.4V across 0–1.5A load and junction temperatures from 0°C to 125°C.
It features built-in current limiting (1.6A min), thermal shutdown activation at 150°C, and ripple rejection of 60–70dB at 120Hz with 25µF tantalum output capacitor. Stability requires ≥10µF aluminum electrolytic or equivalent at VOUT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1.0% at 10mA; ±1.0% load regulation over 0–1.5A ensures consistent logic rail under dynamic load |
| Dropout Voltage | Max 1.4V at 1.5A load; enables 3.3V regulation from as low as 4.7V input supply |
| Output Current | 1.5A continuous; supports high-current 3.3V domains like PCI/AGP bus termination |
| Ripple Rejection | 60–70dB at 120Hz; suppresses input supply noise without requiring ultra-low-ESR capacitors |
| Thermal Resistance | θJA = 86°C/W (TO220-3L, no heatsink); defines minimum heatsink requirement for 15W max dissipation |
| Reference Voltage | 1.25V ±2% internal bandgap; sets precision for fixed-output accuracy and adjustable-mode programming |
Pinout & Package
AP1086TG-U uses the TO220-3L package with exposed tab electrically connected to VOUT for thermal conduction and mechanical mounting. Pin 1 is Adj/GND (ground in fixed mode), Pin 2 is VOUT, Pin 3 is VIN.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Adj/GND) | Ground reference (fixed mode) / Adjustment node (adjustable mode) | Internally tied to GND for 3.3V fixed operation; connects external resistor divider when used as adjustable regulator |
| Pin 2 (VOUT) | Regulated output terminal | Delivers 3.3V/1.5A; tab is electrically connected to this pin-must be isolated from chassis ground unless system common-grounded |
| Pin 3 (VIN) | Unregulated input supply | Requires ≥4.8V input; must remain ≥1.4V above VOUT during transients to avoid dropout; decoupling capacitor required |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 3.3V output option | Eliminates external resistors and layout complexity for standard logic supply rails |
| 1.4V max dropout at 1.5A | Enables efficient conversion from 5V or 12V supplies without switching regulator complexity |
| Built-in thermal shutdown | Automatically disables output at 150°C junction temperature to prevent permanent damage during overload or poor heatsinking |
| Current limiting (1.6A min) | Protects against short-circuit faults while maintaining safe SOA during transient overloads |
| RoHS-compliant "Green" molding compound | Halogen-free (no Br, Sb) construction meets EU Directive 2002/95/EC environmental requirements |
Applications
| High-Speed Bus Termination | VGA Card Logic Supply |
|---|---|
Use Scenario: Providing clean, low-noise 3.3V termination voltage for PCI Express or AGP bus lines with fast current transients. IC Role / Device Role / Timing Role: Fixed-output LDO regulator delivering stable 3.3V rail with <1.4V dropout and 60–70dB ripple rejection. Use Value: Maintains signal integrity by minimizing voltage droop during 0–1.5A load steps, reducing need for bulk output capacitance. |
Use Scenario: Powering 3.3V I/O circuitry and memory interfaces on discrete graphics cards with space-constrained PCB layouts. IC Role / Device Role / Timing Role: Primary linear regulator supplying regulated 3.3V to GPU interface logic and frame buffer controllers. Use Value: TO220-3L package provides robust thermal performance without requiring multilayer thermal vias, simplifying board design. |
| Low-Noise 3.3V Microcontroller Core | Industrial Sensor Signal Chain Bias |
Use Scenario: Generating quiet 3.3V supply for ARM Cortex-M or RISC-V microcontrollers where switching noise disrupts ADC sampling. IC Role / Device Role / Timing Role: Low-ripple LDO providing regulated core voltage with RMS noise <0.003% of VOUT (10Hz–10kHz). Use Value: Enables 12-bit+ ADC accuracy without additional filtering, eliminating need for post-regulation LC stages. |
Use Scenario: Biasing precision op-amps, analog front-ends, and bridge sensors in factory automation modules operating at ambient temperatures up to 85°C. IC Role / Device Role / Timing Role: Stable 3.3V reference source with ±0.5% temperature stability and load regulation <33mV over 0–1.5A. Use Value: Ensures sensor offset drift remains within specification across industrial temperature range without recalibration. |
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 |
|---|---|---|---|
| AP1086T33G-U | Same die, identical electrical specs, "Green" halogen-free molding compound instead of standard RoHS-compliant compound | No functional difference; selected when halogen-free compliance is mandated by end-equipment standards | Direct drop-in replacement if halogen-free certification is required |
| LM1086CT-3.3 | 1.5A LDO with 1.5V dropout (vs. 1.4V), higher θJA = 95°C/W (TO220), no "Green" compound option | Marginally lower efficiency at low VIN–VOUT differential; less suitable for thermally constrained enclosures | Use only if AP1086TG-U is unavailable and 0.1V higher dropout is acceptable |
Compared with AP1086T33G-U, AP1086TG-U offers identical performance with standard RoHS compliance; compared with LM1086CT-3.3, it delivers tighter dropout, lower thermal resistance, and halogen-free packaging-critical for high-reliability industrial and computing applications.
Availability
AP1086TG-U is available at Aetrix Electronics and suitable for high-speed bus termination, VGA card power delivery, and industrial sensor biasing requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for AP1086TG-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 high-performance, high-reliability components for power management, signal integrity, and protection applications.
The AP1086 product line delivers low-dropout linear regulators optimized for cost-sensitive, thermally demanding applications in computing, graphics, and industrial control systems where precision, stability, and rugged packaging are essential.
FAQ
What is the minimum input voltage required for AP1086TG-U to regulate 3.3V at 1.5A?
The AP1086TG-U requires a minimum input voltage of 4.7V to maintain 3.3V regulation at full 1.5A load, based on its guaranteed maximum dropout voltage of 1.4V. At lower loads, regulation is possible down to 4.55V (3.3V + 1.25V typical dropout), but 4.7V ensures margin across temperature and process variation.
Can AP1086TG-U be used in adjustable mode despite its fixed 3.3V marking?
No. AP1086TG-U is factory-configured as a fixed 3.3V output device via internal mask programming. Its Pin 1 (Adj/GND) is internally connected to ground; connecting external resistors will not alter the output voltage and may impair regulation or stability.
Is a heatsink mandatory for AP1086TG-U operating at 1.5A continuous current?
Yes. With θJA = 86°C/W and power dissipation up to 10.35W (e.g., 12V input → 3.3V/1.5A), junction temperature exceeds 150°C without heatsinking. A minimum 15°C/W heatsink is required to keep TJ ≤ 125°C at 25°C ambient, per thermal calculations in DS31028 Rev.6.
What output capacitor types and values satisfy AP1086TG-U stability requirements?
A minimum 10µF aluminum electrolytic capacitor is required at VOUT for stability and transient response. Tantalum (25µF) improves ripple rejection to 60–70dB at 120Hz. Ceramic capacitors alone are insufficient due to ESR requirements; hybrid use (e.g., 10µF electrolytic + 1µF ceramic) is recommended for broadband noise suppression.
AP1086TG-U Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 12V
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- 5V
- 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
AP1086TG-U FAQ
1.How can I place an order for AP1086TG-U through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1086TG-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 AP1086TG-U reliable?
The price and inventory of AP1086TG-U are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1086TG-U is usually 5 days.
3.What payment methods are accepted for AP1086TG-U?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1086TG-U transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1086TG-U?
AP1086TG-U orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1086TG-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 AP1086TG-U?
For technical support, including AP1086TG-U datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1086TG-U requirements.
6.How does Aetrix verify that AP1086TG-U is sourced from the original manufacturer or authorized distributors?
All AP1086TG-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 AP1086TG-U meets industry standards.
7.What is the process for return or replacement of AP1086TG-U?
All AP1086TG-U units undergo pre-shipment inspection (PSI). If there is an issue with AP1086TG-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 AP1086TG-U part is unused and in its original packaging.
Return procedure for AP1086TG-U:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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