Diodes Incorporated AP1115AY50G-13

Overview

AP1115AY50G-13 from Diodes Incorporated is a 0.6A low-dropout positive voltage regulator in fixed 5.0V output mode, housed in a SOT89-3L package. It delivers stable regulation with ≤1.3V dropout at full load, supports input up to 18V, and is qualified for PC peripheral and VGA card power rails requiring tight load/line regulation and fast transient response.

For engineers reviewing the AP1115AY50G-13 datasheet, AP1115AY50G-13 pinout, AP1115AY50G-13 application, or AP1115AY50G-13 equivalent, this page provides verified electrical specifications, thermal performance data, SOT89-3L terminal mapping, fixed-output design constraints, and OEM supply-chain support details.

Technical Context

The AP1115AY50G-13 operates as a fixed-output linear regulator with internal reference (1.25V typical), error amplifier, and PNP pass transistor. Its control loop ensures <1% load regulation across 0–600mA and maintains stability with 100µF output capacitance (ESR 0.15–20Ω).

Thermal shutdown activates at TJ ≥150°C; current limiting engages above 0.7A. Dropout behavior is characterized at ΔVOUT = 1% of nominal output, with guaranteed 1.1V typical dropout at 0.6A and 5.0V output.

Key Specifications

Pinout & Package

SOT89-3L package with exposed tab (Pin 3) electrically connected to VIN; thermally optimized for PCB copper pour attachment. Pin 1 = Adj (GND), Pin 2 = VOUT, Pin 3 = VIN (tab).

Key Features

Applications

Availability

AP1115AY50G-13 is available at Aetrix Electronics and suitable for VGA graphics card power, USB peripheral supply, and industrial PC peripheral applications requiring stable component supply despite end-of-life status.

Supply support for AP1115AY50G-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 power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.

The AP1115 belongs to Diodes' LDO regulator product line, engineered for low-voltage IC supply in space-constrained applications such as bus termination, logic rails, and legacy interface cards where dropout and thermal performance are critical.

FAQ

Is AP1115AY50G-13 still in production?

No - Diodes Incorporated officially discontinued AP1115AY50G-13 as of April 2016 (DS31026 Rev. 6-4). Aetrix Electronics maintains limited legacy stock with full traceability and offers lifecycle coordination support for ongoing production runs.

What is the maximum input voltage for AP1115AY50G-13?

The absolute maximum DC input voltage is +18V, but recommended operating range for 5.0V output is 6.5V to 12V per datasheet conditions. Exceeding 12V increases power dissipation and requires careful thermal derating above 75°C ambient.

Can AP1115AY50G-13 replace a standard 7805 regulator?

Yes, in fixed 5V applications - but only if input voltage stays ≥6.5V. Unlike the 7805 (2V dropout), AP1115AY50G-13's 1.3V max dropout enables operation from marginal 6.5V rails where 7805 fails, though it lacks built-in reverse-polarity protection.

What output capacitor is required for stability?

A minimum 100µF tantalum or aluminum electrolytic capacitor (ESR 0.15–20Ω) must be placed directly between Pin 2 (VOUT) and ground. Ceramic capacitors alone are insufficient; the ESR range is mandatory for phase margin control per DS31026 Section 4.