Diodes Incorporated AP2191DM8G-13

Overview

AP2191DM8G-13 from Diodes Incorporated is a single-channel, active-high enable, high-side USB power switch with integrated output discharge, 2.1A current limiting, 90mΩ R_DS(ON) (U-DFN2018-6), and 7ms deglitched fault reporting - designed for hot-swap protection in USB 2.0-compliant host ports on laptops and docking stations.

For engineers reviewing the AP2191DM8G-13 datasheet, AP2191DM8G-13 pinout, AP2191DM8G-13 application, or AP2191DM8G-13 equivalent, key selection criteria include enable polarity compatibility, thermal shutdown threshold (140°C), output discharge resistance (100Ω), UVLO trip (1.9V typ), and package-specific R_DS(ON) performance across -40°C to +85°C ambient.

Technical Context

This device implements a thermally protected, slew-rate-controlled N-channel MOSFET high-side switch with internal current-sense FET architecture - eliminating external sense resistors while maintaining precise 2.1A overload trip (±0.5A) and fast transient response (<1.5ms rise time). The integrated UVLO ensures turn-on only above 1.9V and automatic shutdown below that threshold.

The FLG pin delivers open-drain fault signaling with 7ms blanking to suppress false triggers during capacitive inrush; discharge control activates automatically upon EN deassertion via a dedicated 100Ω internal NMOS path - no external components required. Reverse current blocking prevents backflow when V_OUT > V_IN during disable.

Key Specifications

Pinout & Package

AP2191DM8G-13 is packaged in U-DFN2018-6 (2.0mm × 1.8mm, 0.5mm pitch), featuring an exposed thermal pad for enhanced heat dissipation. Pin assignments are validated per Diodes DS32251 Rev. 4-2.

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, AP2191DM8G-13 uniquely combines active-high enable, integrated discharge, reverse current blocking, and 90mΩ R_DS(ON) in a 2mm×1.8mm package - making it optimal for space-constrained USB host ports needing robust hot-swap resilience without added discrete components.

Availability

AP2191DM8G-13 is available at Aetrix Electronics and suitable for USB host port protection, laptop docking station power control, and set-top box peripheral hubs requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant green packaging.

Supply support for AP2191DM8G-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 AP2191D product line delivers USB-compliant, thermally robust high-side power switches optimized for hot-swap safety and compact layout - targeting portable and embedded systems where board space, thermal headroom, and plug-and-play reliability are critical.

FAQ

What is the maximum continuous load current supported by AP2191DM8G-13?

The AP2191DM8G-13 supports 1.5A maximum continuous load current per Diodes' Recommended Operating Conditions. Its 2.1A current limit is a protection threshold - sustained operation above 1.5A risks thermal shutdown depending on PCB layout, ambient temperature, and airflow. Derating is required above +60°C ambient.

Does AP2191DM8G-13 require external components for fault debouncing?

No. The FLG output includes a built-in 7ms deglitch circuit that suppresses false overcurrent reports during capacitive inrush events. This eliminates the need for external RC networks or microcontroller firmware filtering - verified in DS32251 Figure 6 and Application Note Section 3.2.

How does the output discharge function operate, and what is its timing?

When EN is driven low, an internal 100Ω NMOS transistor connects OUT to GND, discharging external capacitors. For a 120µF load, V_OUT falls below 0.5V in ≤0.6ms (T_DIS). Discharge is automatic, requires no control signals, and is independent of input voltage - confirmed in Electrical Characteristics Table (T_DIS, R_DIS).

Can AP2191DM8G-13 be used in dual-role USB ports (e.g., DRD or USB-C with power delivery)?

No. Diodes explicitly advises against using AP2191D in dual-purpose ports like shared HDMI/MHL or USB-C DRP applications where simultaneous data communication and battery charging occur. Its architecture lacks bidirectional control, VBUS detection, or PD negotiation logic - per Application Note Section 5.