Diodes Incorporated AP2301AS-13

Overview

AP2301AS-13 from Diodes Incorporated is a single-channel, current-limited, high-side power switch optimized for USB and hot-swap applications. It features 2.5A accurate current limiting, 70mΩ on-resistance at 5V, 2µs short-circuit response time, integrated output discharge, and reverse current blocking. It operates across 2.7V–5.5V input voltage and delivers controlled power switching in LCD TV power rails and USB hub load management.

For engineers reviewing the AP2301AS-13 datasheet, AP2301AS-13 pinout, AP2301AS-13 application, or AP2301AS-13 equivalent, key selection criteria include active-low enable logic, SO-8 thermal performance (96°C/W), 7ms FLG deglitch timing, UVLO threshold of 2.0V, and compatibility with heavy capacitive loads up to 120µF in set-top-box and docking station designs.

Technical Context

The AP2301AS-13 implements a P-channel MOSFET high-side switch with integrated current-sense FET architecture-eliminating external sense resistors while maintaining precise 2.5A trip threshold. Its thermal shutdown activates at +140°C with +20°C hysteresis, enabling self-cycling protection during sustained overloads.

It integrates a dedicated N-MOS discharge transistor activated upon disable, providing 105Ω discharge resistance for controlled V_OUT decay (<0.6ms to <0.5V). The open-drain FLG output reports over-current and over-temperature faults with 7ms blanking to suppress false triggers from inrush transients.

Key Specifications

Pinout & Package

AP2301AS-13 is housed in an SO-8 package with exposed pad (non-electrical ground conduction path) for enhanced thermal dissipation (θ_JA = 96°C/W). Pin assignments are validated per Diodes DS37743 Rev. 2–2.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side current-limited power switch applications.

Compared with AP2311AS-13, AP2301AS-13 offers direct compatibility with active-low MCU GPIOs without external inversion; versus TCK112G, it provides tighter current accuracy, faster fault response, and built-in discharge-reducing external component count in space-constrained USB and display applications.

Availability

AP2301AS-13 is available at Aetrix Electronics and suitable for USB hub power management, LCD TV backlight rail control, and set-top box port protection requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.

Supply support for AP2301AS-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 consumer, industrial, and computing markets.

The AP2301A/AP2311A product line targets USB-compliant hot-swap and load-switching applications, delivering integrated protection-including current limiting, thermal shutdown, UVLO, and output discharge-in compact surface-mount packages.

FAQ

What is the maximum continuous load current supported by AP2301AS-13?

The AP2301AS-13 supports 2.0A maximum continuous load current per Diodes' recommended operating conditions. Its 2.5A current-limit threshold activates only during overload or short-circuit events, allowing temporary operation above 2.0A without damage-provided thermal limits (T_J ≤ +150°C) are maintained via proper PCB copper area and thermal vias.

Does AP2301AS-13 require external components for basic operation?

No external components are required for core functionality: a 0.1µF ceramic capacitor between IN and GND is mandatory for stability, but the 7ms FLG deglitch, soft-start, UVLO, and discharge functions are fully integrated. No external sense resistor, gate resistor, or pull-up/pull-down is needed-only the bypass cap and optional output ceramic decoupling (0.1–1.0µF) for noise immunity.

How does the FLG pin behave during a short-circuit event?

Upon detecting over-current, the FLG pin remains inactive for 7ms (deglitch period), then pulls low via its internal 25–40Ω FET. It stays low until both over-current and over-temperature conditions clear. During thermal cycling, FLG remains asserted low throughout each shutdown/recovery cycle-providing unambiguous fault status to the host controller without debouncing logic.

Can AP2301AS-13 be used in dual-purpose HDMI/MHL + charging ports?

Yes-its integrated discharge function and precise enable sequencing make it suitable for dual-purpose ports. However, VIN must reach ≥2.0V (UVLO threshold) before EN is asserted to prevent uncontrolled discharge into peripheral batteries. Diodes' Application Note AN-37743 confirms this use case for shared HDMI/MHL ports where simultaneous data streaming and battery charging occur.