Diodes Incorporated AP1086K15G-13

Overview

AP1086K15G-13 from Diodes Incorporated is a 1.5A low dropout (LDO) positive fixed-mode voltage regulator delivering a precise 1.5V output with ≤1.4V dropout at full load, thermal shutdown, and current limiting. It uses TO263-3L package with VOUT-connected tab, supports 3V–12V input, and targets high-speed bus termination and low-current 3.3V logic supply systems.

For engineers reviewing the AP1086K15G-13 datasheet, AP1086K15G-13 pinout, AP1086K15G-13 application, or AP1086K15G-13 equivalent, key selection criteria include guaranteed 1.5V ±30mV output tolerance at 10mA, 1.4V max dropout at 1.5A, thermal resistance θJC = 0.65°C/W (control circuitry), stability with ≥10µF output capacitor, and RoHS-compliant green molding compound.

Technical Context

The AP1086K15G-13 integrates a precision 1.25V reference, error amplifier, and PNP pass transistor in a fixed-output configuration. Its internal feedback network sets VOUT = 1.5V without external resistors, eliminating adjustment complexity while maintaining tight initial accuracy (±2%) and load regulation (±12mV over 0–1.5A).

Designed for fast transient response, it achieves <100µs recovery from 0→1.5A load steps with minimal output deviation (±40mV typical). Thermal shutdown activates at TJ ≥150°C, and junction-to-case thermal resistance is split between control circuitry (0.65°C/W) and power transistor (2.7°C/W), enabling accurate heatsink sizing.

Key Specifications

Pinout & Package

AP1086K15G-13 uses TO263-3L surface-mount package with exposed VOUT-connected tab for thermal conduction and electrical connection. Pin 1 is Adj (GND), Pin 2 is VOUT, Pin 3 is VIN. The tab must be soldered to a large copper pour for thermal management.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AP1086D15G-13, the K-suffix TO263-3L offers 18°C/W lower θJA for equivalent power dissipation, while LD1086S15TR trades 0.2V higher dropout and 15dB lower PSRR for alternate supply-chain availability-neither matches AP1086K15G-13's combination of 1.4V dropout, 70dB PSRR, and 83°C/W thermal resistance.

Availability

AP1086K15G-13 is available at Aetrix Electronics and suitable for VGA graphics card power, DDR memory I/O supply, and industrial PLC I/O module applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for AP1086K15G-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 and computing markets.

The AP1086 series belongs to Diodes' low-dropout linear regulator product line, engineered specifically for high-speed bus termination and low-current logic supply applications where precision, fast transient response, and thermal robustness are critical.

FAQ

What is the minimum input voltage required for AP1086K15G-13 to regulate 1.5V output?

The device requires VIN ≥ VOUT + 1.4V to maintain regulation, so minimum input is 2.9V. At 3.0V input, it delivers full 1.5A load with ≤1.4V dropout; below 2.9V, output collapses toward VIN minus dropout. Input must also stay within absolute maximum rating of 12V.

Can AP1086K15G-13 be used in adjustable mode?

No. The "K15" suffix denotes factory-masked fixed 1.5V output; the Adj pin is internally grounded and not functional for external voltage programming. Only AP1086-Adj variants support adjustable operation via external resistor divider.

Is a heat sink required for continuous 1.5A operation?

Yes, under worst-case conditions (e.g., 12V input, 1.5V output, 70°C ambient), power dissipation reaches 15.75W. With θJA = 83°C/W, junction temperature would exceed 150°C without heatsinking. A 10°C/W heatsink reduces θJA to ~20°C/W, keeping TJ < 120°C.

What type of output capacitor is recommended for stability?

A minimum 10µF aluminum electrolytic capacitor is required; 100µF is recommended for optimal transient response. Tantalum or polymer capacitors may be used but must meet ESR specifications (0.1–1Ω) per datasheet Figure 10. Ceramic capacitors alone are insufficient due to low ESR causing instability.