Diodes Incorporated AP2141DSG-13

Overview

AP2141DSG-13 from Diodes Incorporated is a single-channel, active-low enable, high-side USB power switch with integrated current limiting (0.8A typ), output discharge, and fault reporting. It operates from 2.7V–5.5V input, features 90mΩ R_DS(ON) in U-DFN2018-6 package, and delivers controlled 0.6ms rise time for hot-swap USB port protection in laptops and docking stations.

For engineers reviewing the AP2141DSG-13 datasheet, AP2141DSG-13 pinout, AP2141DSG-13 application, or AP2141DSG-13 equivalent, key selection criteria include active-low EN polarity, 7ms FLG deglitch timing, reverse current blocking, thermal shutdown at 140°C, and compatibility with 120µF output capacitance under low-temperature operation.

Technical Context

The AP2141DSG-13 implements a thermally protected high-side NMOS switch with internal current-sense FET architecture-eliminating external sense resistors-and integrates UVLO (1.9V threshold), slew-rate control, and open-drain FLG with 7ms blanking to suppress false over-current triggers during capacitive load turn-on.

Its discharge function activates on EN de-assertion via a dedicated 100Ω internal NMOS path, enabling rapid V_OUT collapse (<0.6ms for 1µF); reverse current blocking prevents backflow when V_OUT > V_IN, and thermal hysteresis (25°C) ensures stable cycling during sustained overload.

Key Specifications

Pinout & Package

AP2141DSG-13 is packaged in U-DFN2018-6: 2.0mm × 1.8mm, 0.5mm pitch, exposed thermal pad internally connected to GND. The package supports high-power density PCB layouts with low θ_JA = 70°C/W (2″×2″ FR-4, 2oz Cu, thermal vias).

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, AP2141DSG-13 uniquely combines active-low EN, integrated discharge, reverse-current blocking, and 7ms FLG deglitch in a 2.0mm×1.8mm U-DFN package-making it optimal for space-constrained, single-rail USB hot-swap where minimal external components and robust fault immunity are critical.

Availability

AP2141DSG-13 is available at Aetrix Electronics and suitable for USB port protection, laptop docking stations, and set-top box peripheral power management requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.

Supply support for AP2141DSG-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, computing, and industrial markets.

The AP2141D/AP2151D product line targets USB 2.0-compliant hot-swap applications, delivering integrated protection (current, thermal, UVLO), precise current limiting, and compact packaging for space-sensitive portable and docked systems.

FAQ

What is the maximum continuous load current supported by AP2141DSG-13?

The AP2141DSG-13 supports 500mA maximum continuous load current per the Recommended Operating Conditions table. Although its current limit is 0.8A typical, sustained operation above 500mA requires careful thermal design due to R_DS(ON) heating-especially in the U-DFN2018-6 package with θ_JA = 70°C/W. Derating is advised above +60°C ambient.

Does AP2141DSG-13 require external components for basic USB port protection?

No external components are required for core functionality: the 7ms FLG deglitch, output discharge, reverse-current blocking, and UVLO operate autonomously. However, Diodes recommends a 0.1µF ceramic capacitor between IN and GND, plus a 10–120µF bulk capacitor on OUT depending on load-especially below –20°C-to ensure stable current-limiting behavior and avoid false trips.

How does the FLG pin behave during simultaneous over-current and over-temperature events?

The FLG pin asserts low when either over-current or over-temperature occurs-and remains low until both fault conditions are fully cleared. There is no prioritization: if thermal shutdown activates while current limiting is active, FLG stays asserted. Recovery requires removal of both faults and a minimum 7ms blanking window before FLG releases, preventing chatter during marginal conditions.

Can AP2141DSG-13 be used in dual-role USB ports that support both data and charging?

No-Diodes explicitly advises against using AP2141DSG-13 in dual-purpose ports (e.g., HDMI/MHL with simultaneous charging). Its architecture lacks bidirectional data path support and is optimized solely for unidirectional high-side power switching. For such applications, purpose-built USB Type-C PD controllers with integrated power path management are required.