Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Diodes Incorporated AP1086T15L-U

Name: AP1086T15L-U
Brand: Diodes Incorporated
SKU: AP1086T15L-U
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: AP1086T15L-U

Manufacturer:: Diodes Incorporated

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: TO-220-3

Datasheet:: AP1086T15L-U.pdf

Description:: IC REG LINEAR 1.5V 1.5A TO220-3

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:186

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

AP1086T15L-U from Diodes Incorporated is a 1.5A low dropout (LDO) positive fixed-mode voltage regulator delivering 1.5V output with ≤1.4V dropout at full load, ±1.5% initial output tolerance, and 10μF minimum output capacitance requirement. It operates from 3V to 12V input and is thermally protected with internal current limiting, targeting high-speed bus termination and 3.3V logic supply rails in VGA cards and embedded systems.

For engineers reviewing the AP1086T15L-U datasheet, AP1086T15L-U pinout, AP1086T15L-U application, or AP1086T15L-U equivalent, key selection factors include dropout voltage at 1.5A, thermal resistance (θ_JA = 86°C/W for TO220-3L), load regulation (≤15mV), ripple rejection (70dB at 120Hz), and fixed-output configuration without external resistors.

Technical Context

The AP1086T15L-U implements a PNP-based LDO architecture with a 1.25V internal reference and feedback amplifier driving an NPN pass transistor. Its fixed 1.5V output is mask-programmed during fabrication-no external resistor network required-reducing BOM count and layout sensitivity compared to adjustable variants.

Thermal shutdown activates at 150°C junction temperature, and current limiting engages at ≥1.6A under 5V VIN–VOUT differential. Stability relies on ≥10μF aluminum electrolytic or tantalum output capacitance placed adjacent to the VOUT pin, with no ESR requirements specified.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	1.500V ±1.5% at 10mA, 25°C - ensures compatibility with 1.5V DDR memory I/O and core logic rails
Maximum Dropout Voltage	1.4V at 1.5A load - enables stable 1.5V output from as low as 2.9V input supply
Load Regulation	≤15mV over 0–1.5A - maintains tight voltage control across dynamic CPU/GPU load transients
Ripple Rejection	70dB at 120Hz with 25μF tantalum Cout - suppresses switching noise from upstream DC/DC converters
Thermal Resistance θ_JA	86°C/W (TO220-3L, no heatsink, no airflow) - defines maximum power dissipation limit of ~1.7W at 70°C ambient
Minimum Output Capacitance	10μF aluminum/tantalum - mandatory for loop stability and transient response; no ESR dependency
Quiescent Current	5–10mA minimum load requirement - ensures regulation integrity under light-load conditions

Pinout & Package

AP1086T15L-U uses the TO220-3L package with exposed tab electrically connected to VOUT for enhanced thermal conduction. Pin 1 is Adj (GND), Pin 2 is VOUT, Pin 3 is VIN. The tab must be soldered to a copper pour for effective heat dissipation.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1: Adj (GND)	Ground reference for fixed-mode operation	Internally tied to ground; no external connection required - distinguishes fixed from adjustable variants
Pin 2: VOUT	Regulated 1.5V output terminal	Connected to device tab; requires ≥10μF capacitor to ground within 5mm trace length for stability
Pin 3: VIN	Unregulated input supply input	Must remain ≥2.9V (1.5V + 1.4V dropout) to sustain regulation; decoupling capacitor recommended

Key Features

Feature	Design Value
Fixed 1.5V output	Mask-programmed during wafer fabrication - eliminates external resistor network and associated tolerance drift
1.4V dropout at 1.5A	Enables use with 3.3V or 5V intermediate rails while delivering 1.5V without cascaded conversion loss
Integrated thermal shutdown	Triggers at 150°C junction temperature - prevents permanent damage during sustained overload or poor heatsinking
Current limiting	≥1.6A trip threshold - protects against short-circuit faults while allowing brief inrush currents
Lead-free & RoHS-compliant	Meets EU Directive 2002/95/EC with green molding compound - supports environmental compliance in industrial and computing applications

Applications

VGA Graphics Card Power

DDR Memory I/O Supply

Use Scenario: Providing clean 1.5V rail for GPU memory interface circuitry on discrete graphics cards.

IC Role / Device Role / Timing Role: Fixed-output LDO regulator supplying stable voltage to DDR2/DDR3 memory I/O buffers.

Use Value: Tight load regulation (≤15mV) and fast transient response maintain signal integrity during burst memory access.

Use Scenario: Delivering regulated 1.5V to DDR2 SDRAM chips in embedded computing modules.

IC Role / Device Role / Timing Role: Primary 1.5V VDDQ source with low-noise output critical for timing margin in high-speed data transfers.

Use Value: 70dB ripple rejection suppresses noise from switching power supplies, reducing bit error rates.

Industrial PLC Logic Core

Low-Power FPGA Configuration Rail

Use Scenario: Powering 1.5V logic cores in programmable logic controllers operating in extended temperature environments.

IC Role / Device Role / Timing Role: Main 1.5V supply for microcontroller peripherals and communication interfaces (UART, SPI).

Use Value: Thermal shutdown and current limiting ensure fault resilience in unattended industrial deployments.

Use Scenario: Supplying configuration voltage to FPGA I/O banks requiring precise 1.5V during startup and reconfiguration.

IC Role / Device Role / Timing Role: Dedicated low-noise 1.5V source for FPGA configuration and partial reconfiguration sequences.

Use Value: ±1.5% output tolerance guarantees reliable bitstream loading and I/O bank initialization.

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
AP1086K15L-13	TO263-3L package (θ_JA = 83°C/W), tape-and-reel packaging	Better thermal performance in space-constrained PCBs; requires surface-mount assembly	Select when board area is limited and thermal budget allows lower θ_JA, not for through-hole mounting
LD1086DT15R	STMicroelectronics part; 1.5V fixed, TO220 package, but higher dropout (1.5V typ.) and wider tolerance (±2%)	Lower cost but reduced efficiency and accuracy; less suitable for tight-margin DDR I/O rails	Acceptable for non-critical logic rails where 1.5V ±2% and 1.5V dropout are acceptable

Compared with AP1086K15L-13, the AP1086T15L-U offers identical electrical specs but simpler through-hole assembly and higher θ_JA; versus LD1086DT15R, it delivers tighter output tolerance and lower dropout-critical for power-sensitive 1.5V memory interfaces.

Availability

AP1086T15L-U is available at Aetrix Electronics and suitable for VGA graphics card power, DDR memory I/O supply, and industrial PLC logic core applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for AP1086T15L-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, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.

The AP1086 series belongs to Diodes' precision LDO regulator product line, engineered specifically for high-current, low-noise, low-dropout applications in computing, graphics, and industrial control systems where accuracy and thermal robustness are essential.

FAQ

Is AP1086T15L-U adjustable or fixed-output?

AP1086T15L-U is a fixed-output variant delivering precisely 1.5V. Its "T" prefix denotes TO220-3L package and "15" indicates 1.5V output; the internal feedback network is mask-programmed-no external resistors are used or supported. This differs from the adjustable AP1086-Adj version which requires two external resistors to set VOUT.

What is the minimum input voltage required for regulation?

The minimum input voltage is VOUT + dropout voltage = 1.5V + 1.4V = 2.9V at full 1.5A load. At lighter loads, dropout decreases; for example, at 10mA, dropout drops to ~0.5V, permitting operation down to ~2.0V input. However, datasheet specifies guaranteed regulation only above 3V input for 1.5V output.

Can AP1086T15L-U be used without a heatsink?

Yes, but only at reduced load. With θ_JA = 86°C/W and T_JMAX = 150°C, maximum allowable power dissipation at 25°C ambient is (150 − 25)/86 ≈ 1.45W. At 1.5A output and 1.4V dropout, power dissipation is 2.1W - exceeding this limit. A heatsink or copper pour is required for continuous 1.5A operation at ambient >25°C.

Does AP1086T15L-U require an input capacitor?

The datasheet does not mandate an input capacitor, but recommends one: a large storage capacitor (e.g., 100μF aluminum) from VIN to GND prevents input voltage sag during load transients. Without it, undershoot on VIN may cause temporary dropout or instability, especially when sourced from high-impedance or switching supplies with limited peak current capability.

AP1086T15L-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):: 1.5V

Voltage - Output (Max):: -

Voltage Dropout (Max):: -

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

AP1086T15L-U FAQ

1.How can I place an order for AP1086T15L-U through Aetrix?

Please submit a Request for Quotation (RFQ) for AP1086T15L-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 AP1086T15L-U reliable?

The price and inventory of AP1086T15L-U are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1086T15L-U is usually 5 days.

3.What payment methods are accepted for AP1086T15L-U?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1086T15L-U transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP1086T15L-U?

AP1086T15L-U orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP1086T15L-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 AP1086T15L-U?

For technical support, including AP1086T15L-U datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1086T15L-U requirements.

6.How does Aetrix verify that AP1086T15L-U is sourced from the original manufacturer or authorized distributors?

All AP1086T15L-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 AP1086T15L-U meets industry standards.

7.What is the process for return or replacement of AP1086T15L-U?

All AP1086T15L-U units undergo pre-shipment inspection (PSI). If there is an issue with AP1086T15L-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 AP1086T15L-U part is unused and in its original packaging.

Return procedure for AP1086T15L-U:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-11 Comparator Circuit: Voltage Thresholds, Op-Amp Differences, LM393 and Practical Design

Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.

2026-09-10 Schmitt Trigger Explained: Hysteresis, Circuits, Inverters and Applications

Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …