Diodes Incorporated AP1086D25L-13

Overview

AP1086D25L-13 from Diodes Incorporated is a fixed-output 2.5V, 1.5A low dropout (LDO) linear regulator in TO252-3L package, featuring 1.4V max dropout at full load, ±1% output voltage tolerance at 10mA, and built-in thermal shutdown and current limiting. It delivers stable 2.5V supply for low-voltage logic, VGA card power rails, and high-speed bus termination circuits.

For engineers reviewing the AP1086D25L-13 datasheet, AP1086D25L-13 pinout, AP1086D25L-13 application, or AP1086D25L-13 equivalent, key selection criteria include dropout voltage under 1.4V at 1.5A, thermal resistance of 101°C/W (junction-to-ambient, no heatsink), minimum 10µF output capacitance requirement, and compatibility with 4.0–12V input range for 2.5V output regulation.

Technical Context

The AP1086D25L-13 implements a fixed-mode LDO architecture with internal voltage reference (1.25V), error amplifier, and PNP pass transistor. Its feedback network is factory-trimmed to deliver precise 2.5V output without external resistors.

It operates across 0–125°C junction temperature range with guaranteed regulation when VIN ≥ VOUT + 1.4V, supports fast transient response via internal compensation, and requires only a single 10µF minimum output capacitor for stability-no ESR constraints or bypass capacitors needed on the ADJ/GND pin since it's fixed-mode.

Key Specifications

Pinout & Package

AP1086D25L-13 uses the TO252-3L (DPAK) surface-mount package with exposed thermal pad connected internally to VOUT. The tab is electrically tied to Pin 2 (VOUT) and must be soldered to a thermal copper plane for effective heat dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-output LDO regulator applications.

Compared with AP1086D25G-13, the AP1086D25L-13 offers identical performance but with standard lead-free finish instead of halogen-free molding; versus TLV1117-25CDCYR, it provides 87.5% higher current capability and 17% lower dropout-critical for high-power 2.5V rail generation where thermal headroom and input voltage margin are constrained.

Availability

AP1086D25L-13 is available at Aetrix Electronics and suitable for PCI Express power delivery, VGA graphics card design, industrial I/O modules, and embedded FPGA configuration requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for AP1086D25L-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 high-reliability power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.

The AP1086 product line delivers cost-optimized, high-current LDO regulators targeting low-noise, low-dropout power conversion in space-constrained applications such as graphics cards, bus interfaces, and embedded control systems.

FAQ

What is the minimum input voltage required for AP1086D25L-13 to regulate 2.5V at 1.5A?

The device requires VIN ≥ VOUT + 1.4V to maintain regulation at full load, so minimum input is 3.9V. Below this, output voltage drops linearly with input-e.g., at 3.8V input, output falls to ~2.4V. Input must also stay within absolute maximum rating of 12V DC.

Can AP1086D25L-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. Omitting it causes oscillation and potential device failure. Ceramic capacitors alone are insufficient due to ESR requirements; hybrid or polymer types meeting 10µF/low-ESR spec are acceptable alternatives.

Is the tab on AP1086D25L-13 electrically isolated?

No. The exposed thermal tab is internally connected to Pin 2 (VOUT). It must be soldered to a PCB copper pour tied to the 2.5V output net-not to ground or any other potential-to ensure proper thermal conduction and avoid short circuits.

Does AP1086D25L-13 support reverse polarity protection?

No. The device lacks integrated reverse-voltage protection. Applying negative voltage to VIN or VOUT can cause irreversible damage. External protection-such as a series Schottky diode on VIN or bidirectional TVS on input-must be added if reverse bias is possible in the system.