Diodes Incorporated AP1086D15G-13

Overview

AP1086D15G-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, ±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-designed for high-speed bus termination and low-current 3.3V logic supply rails in VGA cards and embedded power subsystems.

For engineers reviewing the AP1086D15G-13 datasheet, AP1086D15G-13 pinout, AP1086D15G-13 application, or AP1086D15G-13 equivalent, key selection considerations include dropout voltage under 1.5A load, thermal resistance (θ_JA = 101°C/W in TO252-3L), output stability with aluminum/tantalum capacitors, and fixed-voltage configuration eliminating external resistor networks.

Technical Context

The AP1086D15G-13 implements a PNP-based LDO architecture with a 1.25V internal reference and feedback amplifier driving an NPN pass transistor. Its regulation loop maintains output accuracy across 0–125°C junction temperature while rejecting 120Hz ripple by ≥60dB with 25μF tantalum output capacitance.

Thermal shutdown activates at 150°C junction temperature, and current limiting engages at ≥1.6A. The device requires no external compensation beyond the mandatory 10μF output capacitor and exhibits fast transient response-±40mV deviation during 0→1.5A load steps with 100μF bulk capacitance.

Key Specifications

Pinout & Package

AP1086D15G-13 uses the TO252-3L (DPAK) surface-mount package with exposed thermal pad connected internally to VOUT. The tab serves as the primary VOUT terminal and must be soldered to a large copper pour for thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AP1086D15L-13, the G-suffix offers halogen-free construction essential for automotive and green-certified industrial equipment; versus LD1117S15TR, AP1086D15G-13 delivers 50% higher current capacity and 0.2V lower dropout-enabling robust 1.5V delivery from marginal input rails.

Availability

AP1086D15G-13 is available at Aetrix Electronics and suitable for VGA graphics cards, DDR memory I/O supplies, and FPGA I/O biasing requiring stable component supply, long-term lifecycle assurance, and RoHS/halogen-free compliance.

Supply support for AP1086D15G-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 series belongs to Diodes' LDO voltage regulator product line, engineered specifically for high-current, low-dropout applications in graphics, memory, and FPGA power delivery where precision, thermal resilience, and compact packaging are critical.

FAQ

What is the minimum input voltage required for AP1086D15G-13 to regulate at 1.5V output?

The device requires VIN ≥ VOUT + dropout voltage. With a maximum dropout of 1.4V at 1.5A, the minimum input is 2.9V. At lighter loads, dropout decreases-e.g., ~0.8V at 500mA-allowing stable regulation down to ~2.3V input under typical conditions.

Can AP1086D15G-13 be used in adjustable mode?

No. The "D15" suffix denotes fixed 1.5V output. Only the ADJ variant (e.g., AP1086D-13) supports adjustable operation via external resistors. The D15 version has internal resistor network laser-trimmed for 1.5V and lacks an adjustable pin function.

Is a heatsink required for continuous 1.5A operation in TO252-3L?

With θ_JA = 101°C/W and P_D ≈ (VIN − 1.5V) × 1.5A, a 5V input yields ~5.25W dissipation. At 25°C ambient, junction temperature reaches ~558°C-far exceeding 150°C limit. A minimum 25 cm² copper pour (2 oz) is mandatory; external heatsink recommended for >1A continuous use.

What output capacitor types and values satisfy stability requirements?

Minimum 10μF aluminum electrolytic or tantalum capacitor is required. For optimal transient response and ripple suppression, 100μF low-ESR tantalum (as shown in typical application) or 220μF polymer aluminum is recommended. Ceramic capacitors alone are insufficient due to ESR requirements.