Diodes Incorporated AP2191MPG-13

Overview

AP2191MPG-13 from Diodes Incorporated is a single-channel, active-high enable, current-limited high-side power switch optimized for USB 2.0 hot-swap applications. It delivers 1.5A continuous load current with 95mΩ typical R_DS(ON), 2.1A accurate current limiting, and integrated short-circuit/thermal protection. Used in USB ports of laptops, docking stations, and set-top boxes to manage inrush, block reverse current, and report faults via open-drain FLG.

For engineers reviewing the AP2191MPG-13 datasheet, AP2191MPG-13 pinout, AP2191MPG-13 application, or AP2191MPG-13 equivalent, key selection criteria include enable polarity (active high), 2.7V–5.5V input range, 7ms FLG deglitch timing, thermal shutdown at +140°C, and U-DFN2018-6 package compatibility with space-constrained USB power rail designs.

Technical Context

The AP2191MPG-13 implements a MOSFET-based high-side switch with integrated current-sense FET architecture-eliminating external sense resistors while maintaining precise 2.1A over-current threshold. Its UVLO circuit disables the switch below ~1.9V, ensuring safe hot-insertion behavior.

Thermal protection uses die-temperature sensing with +140°C trip point and +25°C hysteresis, enabling auto-recovery cycling during sustained overload. The 7ms deglitch on the open-drain FLG output suppresses false fault reporting during capacitive load turn-on transients without external RC networks.

Key Specifications

Pinout & Package

AP2191MPG-13 is packaged in a 6-pin U-DFN2018-6 (2.0mm × 1.8mm, 0.5mm pitch) with exposed thermal pad. This compact, lead-free, halogen-free package supports high-density USB port layouts and provides θ_JA = 70°C/W under recommended PCB layout (2-layer FR-4, 3 thermal vias).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TUSB2036IRHBR and TPS22965DSGT, AP2191MPG-13 uniquely combines USB-optimized enable polarity, factory-trimmed 2.1A current limit, integrated 7ms FLG deglitch, and thermal hysteresis-making it optimal for cost-sensitive, space-constrained USB port protection without protocol layer overhead.

Availability

AP2191MPG-13 is available at Aetrix Electronics and suitable for USB 2.0 host ports, set-top box peripheral rails, and laptop docking station power distribution requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.

Supply support for AP2191MPG-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 AP2191 belongs to Diodes' USB Power Switch product line-designed specifically for robust, low-footprint hot-swap control in USB 2.0-compliant systems with emphasis on fault resilience, ESD immunity, and thermal autonomy.

FAQ

What is the maximum continuous output current supported by AP2191MPG-13?

The AP2191MPG-13 supports 1.5A maximum continuous load current per its Recommended Operating Conditions. While its current-limit threshold is 2.1A (typ), sustained operation above 1.5A risks thermal shutdown depending on PCB layout, ambient temperature, and output capacitance. Derating is required above +60°C ambient.

Does AP2191MPG-13 require external components for basic operation?

No external components are required for core switching functionality. A 0.1µF ceramic capacitor between IN and GND is recommended for stability, and an external pull-up resistor on FLG is needed for fault detection. No RC network is required for the 7ms deglitch-the timing is fully internal and factory-trimmed.

Can AP2191MPG-13 be used in USB-C applications?

AP2191MPG-13 is specified for USB 2.0 applications and supports only 5V VBUS switching. It lacks USB-C-specific features such as CC logic, VCONN support, or programmable current limits for USB PD profiles. It may serve as a secondary 5V rail switch in USB-C systems-but not as the primary CC-controlled power path.

How does the FLG pin behave during thermal shutdown versus over-current events?

The FLG pin asserts low identically for both over-current and over-temperature faults, with identical 7ms deglitch timing. It remains low until both conditions clear. Recovery is automatic after fault removal-no reset or EN toggle is required. The open-drain structure allows wired-OR fault bus implementation across multiple channels.