Diodes Incorporated AP2141FMG-7

Overview

AP2141FMG-7 from Diodes Incorporated is an active-low-enable, single-channel, current-limited high-side power switch optimized for USB 2.0 hot-swap applications. It delivers 0.5A continuous load current with 95mΩ typical R_DS(ON), 0.8A accurate current limiting, and integrated short-circuit/thermal protection. Used in laptop USB ports and docking stations to manage inrush, prevent bus faults, and report over-current via open-drain FLG.

For engineers reviewing the AP2141FMG-7 datasheet, AP2141FMG-7 pinout, AP2141FMG-7 application, or AP2141FMG-7 equivalent, this device serves as a robust, RoHS-compliant, green-packaged USB power delivery controller with 7ms deglitch fault reporting, reverse current blocking, and 2.7V–5.5V input operation - critical for stable hot-plug interface design.

Technical Context

The AP2141FMG-7 implements a thermally protected N-channel MOSFET high-side switch with internal current-sense FET architecture-eliminating external sense resistors while maintaining precise 0.8A trip threshold. Its UVLO (1.9V typ) ensures safe turn-on only after stable input rail establishment.

It features a dedicated open-drain FLG output with 7ms blanking time to suppress false triggers from capacitive load inrush; the flag asserts low during over-current or thermal shutdown and remains latched until both faults clear. The U-DFN2018-6 package provides 70°C/W θ_JA with exposed pad tied to GND for thermal management.

Key Specifications

Pinout & Package

AP2141FMG-7 is housed in a 6-pin U-DFN2018-6 package (2.0mm × 1.8mm, 0.5mm pitch) with exposed thermal pad. The pad must be soldered to PCB GND plane for thermal performance but not used as primary electrical ground path.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TUSB2036IRHBR and TPS2051BDBVR, AP2141FMG-7 offers superior thermal efficiency (70°C/W vs >110°C/W), smaller U-DFN2018-6 footprint, tighter 0.8A current limit accuracy, and integrated 7ms deglitch - making it optimal for space-constrained, high-reliability USB power gating.

Availability

AP2141FMG-7 is available at Aetrix Electronics and suitable for USB 2.0 host ports, laptop docking stations, and set-top box peripheral interfaces requiring stable component supply, long-term lifecycle assurance, and green RoHS-compliant packaging.

Supply support for AP2141FMG-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, computing, and industrial markets.

The AP2141/AP2151 family was designed specifically for USB 2.0-compliant hot-swap power distribution - delivering precise current limiting, fast fault response, and compact packaging for next-generation portable and embedded USB interfaces.

FAQ

What is the maximum continuous load current supported by AP2141FMG-7?

The AP2141FMG-7 is rated for 0.5A maximum continuous load current per its datasheet Recommended Operating Conditions. Although its current-limit threshold is 0.8A, sustained operation above 0.5A risks thermal saturation in the U-DFN2018-6 package unless PCB thermal design exceeds minimum pad recommendations - especially at ambient temperatures above +60°C.

Does AP2141FMG-7 require external components for basic USB power switching?

No external components are required for core functionality: the 7ms FLG deglitch, UVLO, and current limiting are fully internal. However, Diodes recommends a 0.1µF X7R ceramic capacitor between IN and GND, plus ≥10µF bulk capacitance on IN and OUT, to suppress transients and ensure stable hot-plug behavior - especially with high-capacitance loads like USB HDDs.

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

During a short circuit, FLG goes low after a nominal 7ms deglitch period and remains low until both over-current and over-temperature conditions clear. If thermal shutdown activates first (e.g., sustained short), FLG stays asserted low even after current returns to normal - ensuring persistent fault signaling until root cause is removed and die cools by ≥25°C.

Can AP2141FMG-7 be used in USB-C applications?

AP2141FMG-7 is specified for USB 2.0 compliance and operates up to 5.5V - making it suitable for USB-C's legacy USB 2.0 data lanes and VBUS switching in non-PD modes. It is not rated for USB-C's 20V PD profiles or CC logic; use only for VBUS gating in USB-C receptacles where power delivery is handled separately by a dedicated PD controller.