Diodes Incorporated AP2401ASN-7

Overview

AP2401ASN-7 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 typical R_DS(ON) at 5V, latch-off overcurrent protection with 7ms deglitch, integrated output discharge, and reverse current blocking. It operates across 2.7V–5.5V input voltage and supports -40°C to +85°C ambient range in U-DFN2020-6 package.

For engineers reviewing the AP2401ASN-7 datasheet, AP2401ASN-7 pinout, AP2401ASN-7 application, or AP2401ASN-7 equivalent, this device delivers precise current limiting, fast 2µs short-circuit response, controlled 0.6ms rise time, and fault reporting via open-drain FLG - critical for robust USB port protection, embedded power sequencing, and capacitive-load management in space-constrained designs.

Technical Context

The AP2401ASN-7 implements an N-channel MOSFET high-side switch with integrated current-sense FET and thermal shutdown circuitry. Its overcurrent detection uses internal sensing (no external resistor), triggering latch-off after 7ms deglitch upon exceeding 2.5A typical limit. UVLO activates at ~2.0V with 50mV hysteresis to prevent erratic turn-on during brown-out.

It integrates a dedicated discharge path activated on disable, providing 105Ω typical discharge resistance to safely bleed output capacitance. The FLG pin reports both overcurrent and overtemperature faults with identical 7ms blanking, and remains latched low until EN toggle or power cycle - eliminating need for external reset logic.

Key Specifications

Pinout & Package

AP2401ASN-7 is housed in a 6-pin U-DFN2020-6 package (2.0mm × 2.0mm, 0.5mm pitch) with exposed thermal pad. The package supports high-density PCB layouts and enhanced thermal dissipation via soldered exposed pad connected to GND plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AP2411ASN-7, the AP2401ASN-7 offers identical protection and performance but simplifies interface design in active-low control systems; versus TCK112G,315, it delivers superior current accuracy, integrated discharge, and smaller U-DFN2020-6 footprint - critical for USB-C and portable electronics.

Availability

AP2401ASN-7 is available at Aetrix Electronics and suitable for USB port protection, docking station power management, and set-top box peripheral isolation requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.

Supply support for AP2401ASN-7 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 AP2401A/AP2411A family targets USB-compliant hot-swap and high-capacitance load switching, delivering integrated protection, precise current limiting, and compact packaging for next-generation portable and embedded systems.

FAQ

What is the function of the NC pin on AP2401ASN-7?

The NC (No Connection) pin on AP2401ASN-7 is not internally bonded and serves no electrical function. Diodes Incorporated recommends tying it externally to the OUT net to improve mechanical stability during reflow and reduce potential EMI coupling. It must never be left floating in high-density layouts.

Does AP2401ASN-7 require an external pull-up on the FLG pin?

Yes - FLG is an open-drain output and requires an external pull-up resistor (typically 10kΩ to 3.3V or 5V) to generate a valid logic-high level when no fault is present. Without it, FLG remains undefined during normal operation and cannot reliably indicate fault status to monitoring circuitry.

Can AP2401ASN-7 drive a 100µF output capacitor safely during turn-on?

Yes - its built-in soft-start provides a typical 0.6ms rise time and inrush current limiting up to 2.5A, enabling safe charging of up to 120µF loads per datasheet testing. For >120µF, verify peak inrush stays below 2.5A using CL = (I_LIMIT × t_R) / ∆V, and consider adding input ferrite if VIN sags.

How does the latch-off behavior interact with thermal shutdown?

Both overcurrent and overtemperature faults trigger the same 7ms deglitch and latch-off action: FLG goes low and OUT remains off until EN is toggled or VIN is cycled. Thermal hysteresis (20°C) ensures the device cools sufficiently before enabling restart - but latch persistence prevents automatic recovery, enforcing deliberate system intervention.