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 AP1086T25L-U

Name: AP1086T25L-U
Brand: Diodes Incorporated
SKU: AP1086T25L-U
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: AP1086T25L-U

Manufacturer:: Diodes Incorporated

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

Package:: TO-220-3

Datasheet:: AP1086T25L-U.pdf

Description:: IC REG LINEAR 2.5V 1.5A TO220-3

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:582

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

Product details

Overview

AP1086T25L-U from Diodes Incorporated is a 1.5A low dropout (LDO) positive fixed-mode voltage regulator delivering a stable 2.5V output with ≤1.4V dropout at full load, ±1% load regulation over 0–1.5A, and 60–70dB ripple rejection at 120Hz. It operates from 4–12V input and is used in VGA cards, high-speed bus termination, and low-current 3.3V logic supplies.

For engineers reviewing the AP1086T25L-U datasheet, AP1086T25L-U pinout, AP1086T25L-U application, or AP1086T25L-U equivalent, key selection criteria include dropout voltage at 1.5A, thermal resistance (θ_JA = 86°C/W for TO220-3L), minimum 10µF output capacitance requirement, and fixed 2.5V output tolerance of ±1.0% at 10mA.

Technical Context

The AP1086T25L-U implements a standard bandgap reference (1.25V) with internal resistor divider to set 2.5V output, enabling fixed-mode operation without external feedback components. Its control loop is optimized for fast transient response-demonstrated by <100µs recovery from 0→1.5A load steps with ≤40mV deviation.

Thermal shutdown activates at 150°C junction temperature, and current limiting is fixed at ≥1.6A under 5V VIN–VOUT differential. The device requires no bypass capacitor on the ADJ/GND pin in fixed mode, simplifying PCB layout versus adjustable variants.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	2.500V ±1.0% at 10mA, 25°C - ensures compatibility with 2.5V I/O standards (e.g., DDR SDRAM, PCI-X).
Dropout Voltage	1.3V typical, 1.4V max at 1.5A - enables regulation from 3.9V input, critical for 5V-to-2.5V conversion with margin.
Load Regulation	20–25mV over 0–1.5A - limits output shift to <1% across full load, meeting Intel VRE-like transient specs.
Ripple Rejection	60–70dB 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) - defines maximum power dissipation (≤1.74W at 125°C ambient) before thermal shutdown.
Minimum Load Current	5–10mA - required to maintain regulation; avoids instability when downstream circuitry draws near-zero quiescent current.

Pinout & Package

AP1086T25L-U uses the TO220-3L package with exposed tab electrically connected to VOUT for enhanced thermal conduction. Pin 1 is Adj/GND (grounded internally for fixed 2.5V mode), Pin 2 is VOUT, and Pin 3 is VIN. The tab must be soldered to a copper pour for thermal management.

Pin/Terminal	Circuit Role	Design Meaning
1 (Adj/GND)	Ground reference for internal divider	Internally tied to GND in fixed 2.5V mode; no external connection required.
2 (VOUT)	Regulated output node	Supplies 2.5V to load; tab is electrically connected to this pin for thermal path.
3 (VIN)	Unregulated input supply	Must exceed VOUT by ≥1.4V; requires bulk capacitor (≥100µF) to prevent sag during transients.

Key Features

Feature	Design Value
Fixed 2.5V output	Eliminates external resistors and layout sensitivity-reduces BOM count and improves long-term stability vs. adjustable LDOs.
1.4V max dropout at 1.5A	Enables efficient 5V-to-2.5V conversion with >1V headroom, reducing power loss versus higher-dropout regulators.
Built-in thermal shutdown	Protects against sustained overload or inadequate heatsinking by disabling output above 150°C junction temperature.
Lead-free & RoHS-compliant	Meets EU Directive 2002/95/EC with green molding compound (no Br/Sb), supporting environmental compliance in industrial designs.

Applications

VGA Graphics Card Power

DDR SDRAM I/O Supply

Use Scenario: Providing clean 2.5V to analog front-end and memory interface circuitry on discrete GPU boards.

IC Role / Device Role / Timing Role: Primary 2.5V LDO for pixel clock drivers and DAC biasing, operating from 5V rail.

Use Value: Low dropout and fast transient response prevent display artifacts during rapid pixel data bursts.

Use Scenario: Supplying 2.5V I/O voltage to DDR1/DDR2 memory modules in embedded controllers.

IC Role / Device Role / Timing Role: Dedicated 2.5V regulator for memory VDDQ, decoupled with 100µF electrolytic + 10µF ceramic.

Use Value: Tight load regulation (<25mV) maintains signal integrity across 0–1.5A dynamic current swings.

Industrial Bus Termination

Low-Power FPGA Core Support

Use Scenario: Biasing 2.5V termination resistors on high-speed parallel buses (e.g., PCI-X, CompactPCI).

IC Role / Device Role / Timing Role: Stable 2.5V source for active termination networks, minimizing reflections and jitter.

Use Value: 70dB ripple rejection suppresses noise coupling into timing-sensitive bus signals.

Use Scenario: Delivering 2.5V to FPGA configuration I/O banks requiring regulated voltage during partial reconfiguration.

IC Role / Device Role / Timing Role: Secondary LDO supplying non-core I/O banks, fed from main 3.3V or 5V system rail.

Use Value: Minimum 5mA load requirement aligns with FPGA I/O leakage, avoiding regulation loss during idle states.

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
AP1086T25G-U	Same electrical specs; green molding compound (no Br/Sb), identical TO220-3L package and marking.	No functional difference; selected where halogen-free compliance is mandated.	Choose for RoHS+halogen-free requirements without design change.
LD1086DT25TR	STMicroelectronics part; 1.5A, 2.5V fixed, but higher dropout (1.5V typ) and lower PSRR (55dB).	Marginally lower efficiency in low-headroom designs; less effective noise filtering.	Select only if AP1086T25L-U is unavailable and 0.1V extra dropout is acceptable.

Compared with AP1086T25L-U, the AP1086T25G-U offers identical performance with halogen-free packaging, while the LD1086DT25TR trades 0.1V higher dropout and 5dB lower ripple rejection for alternate supply-chain availability.

Availability

AP1086T25L-U is available at Aetrix Electronics and suitable for VGA graphics card power, DDR SDRAM I/O supply, and industrial bus termination requiring stable component supply with lead-free compliance and TO220 thermal performance.

Supply support for AP1086T25L-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-reliability power management, signal integrity, and protection solutions for industrial and computing markets.

The AP1086 product line delivers cost-optimized, thermally robust LDO regulators targeting board-level voltage conversion in graphics, memory, and bus interface applications where dropout, transient response, and RoHS compliance are critical.

FAQ

What is the minimum input voltage required for AP1086T25L-U to regulate 2.5V output?

The AP1086T25L-U requires VIN ≥ VOUT + 1.4V to maintain regulation, so minimum input is 3.9V. At lower VIN, output drops linearly with input; regulation is not guaranteed below this threshold even at light loads.

Can AP1086T25L-U be used without an output capacitor?

No. A minimum 10µF aluminum electrolytic capacitor is mandatory between VOUT and GND for stability and transient response. Omitting it causes oscillation and potential device failure under load.

Is the tab on AP1086T25L-U electrically isolated?

No. The TO220-3L tab is internally connected to the VOUT pin. It must be mounted to a grounded or 2.5V copper pour-never to a different potential-unless insulated with a thermal pad rated for ≥2.5V isolation.

Does AP1086T25L-U require a minimum load current in fixed mode?

Yes. The datasheet specifies 5–10mA minimum load current across 0–125°C to maintain regulation. Below this, output voltage may rise above 2.5V due to quiescent current effects in the internal reference circuit.

AP1086T25L-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):: 2.5V

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

AP1086T25L-U FAQ

1.How can I place an order for AP1086T25L-U through Aetrix?

Please submit a Request for Quotation (RFQ) for AP1086T25L-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 AP1086T25L-U reliable?

The price and inventory of AP1086T25L-U are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1086T25L-U is usually 5 days.

3.What payment methods are accepted for AP1086T25L-U?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1086T25L-U transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP1086T25L-U?

AP1086T25L-U orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP1086T25L-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 AP1086T25L-U?

For technical support, including AP1086T25L-U datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1086T25L-U requirements.

6.How does Aetrix verify that AP1086T25L-U is sourced from the original manufacturer or authorized distributors?

All AP1086T25L-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 AP1086T25L-U meets industry standards.

7.What is the process for return or replacement of AP1086T25L-U?

All AP1086T25L-U units undergo pre-shipment inspection (PSI). If there is an issue with AP1086T25L-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 AP1086T25L-U part is unused and in its original packaging.

Return procedure for AP1086T25L-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 …