Diodes Incorporated AP2191AMP-13

Overview

AP2191AMP-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 2.1A accurate current limiting, 95mΩ typical R_DS(ON) at +25°C, and integrated short-circuit/thermal protection with 7ms deglitch on the open-drain FLG output. Designed for use in self-powered USB hubs and portable electronics, it operates across 2.7V–5.5V input and supports controlled 0.6ms rise time.

For engineers reviewing the AP2191AMP-13 datasheet, AP2191AMP-13 pinout, AP2191AMP-13 application, or AP2191AMP-13 equivalent, key selection considerations include enable polarity (active-high), thermal shutdown threshold (+140°C), reverse current blocking capability, and MSOP-8EP package thermal resistance (60°C/W) for embedded power distribution designs.

Technical Context

The AP2191AMP-13 integrates a low-R_DS(ON) N-channel MOSFET with precision current-sense circuitry to enforce 2.1A over-current limit without external components. Its UVLO activates at 1.9V (typ) and disables the switch below that threshold, ensuring safe hot-insertion behavior in USB and hot-plug systems.

It features an open-drain FLG output with 7ms blanking time to suppress false fault reporting during capacitive inrush, and implements thermal shutdown with +25°C hysteresis to cycle safely under sustained overload. The device supports reverse current blocking and maintains <1µA shutdown current.

Key Specifications

Pinout & Package

AP2191AMP-13 is housed in an MSOP-8EP (Exposed Pad) package, featuring thermal enhancement via soldered exposed pad connected to GND for improved θ_JA (60°C/W). Pin assignments are validated per Diodes DS37618 Rev. 2–2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AP2181AMP-13, the active-low variant shares full functional equivalence but demands inverted control logic; compared with TCK112G, AP2191AMP-13 trades higher R_DS(ON) for integrated protection features and USB-optimized timing-reducing system-level component count and validation effort.

Availability

AP2191AMP-13 is available at Aetrix Electronics and suitable for USB hub design, hot-plug module integration, dual-mode port power management, and portable device charging circuits requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for AP2191AMP-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 industrial, computing, and consumer markets.

The AP2191A belongs to Diodes' USB power switch product line, engineered specifically for compliance with USB 2.0 hot-swap requirements and optimized for low-R_DS(ON), precise current limiting, and integrated fault reporting in compact surface-mount packages.

FAQ

What is the maximum continuous load current supported by AP2191AMP-13?

The AP2191AMP-13 is rated for 1.5A maximum continuous load current under recommended operating conditions (−40°C to +85°C ambient, proper PCB thermal layout). While its current-limit threshold is 2.1A, sustained operation above 1.5A risks exceeding thermal limits unless board-level heatsinking is enhanced beyond the MSOP-8EP baseline (θ_JA = 60°C/W).

Can AP2191AMP-13 be used without an external capacitor on the FLG pin?

Yes - the 7ms deglitch timer is fully internal and requires no external components on the FLG pin. The open-drain FLG output pulls low only after confirmed over-current or over-temperature events persist past the blanking window, eliminating false triggers from capacitive inrush or noise without added passive parts.

How does reverse current blocking function in AP2191AMP-13?

When the AP2191AMP-13 is disabled (EN low), its internal MOSFET body diode is reverse-biased due to internal architecture, preventing current flow from OUT to IN. This blocking is effective down to 0V at IN and up to 5.5V at OUT, with leakage limited to 1µA max - critical for systems with multiple power domains or battery backup paths.

Is the exposed pad on the MSOP-8EP package electrically connected?

No - the exposed pad is thermally conductive only and must be soldered to a PCB GND copper pour for optimal thermal performance (θ_JA = 60°C/W), but it is not an electrical ground connection. Diodes specifies it should not serve as the primary current return path; dedicated GND pins (Pin 1) handle all signal and power grounding.