Diodes Incorporated AP2155MPG-13

Overview

AP2155MPG-13 from Diodes Incorporated is a single-channel, active-high, current-limited high-side power switch optimized for USB 2.0 hot-swap and portable power distribution. It delivers 0.5A continuous load current with 90mΩ typical R_DS(ON), 0.8A accurate current limiting, and integrated short-circuit/thermal protection. Used in laptop USB ports and docking stations to control power delivery while suppressing inrush and fault transients.

For engineers reviewing the AP2155MPG-13 datasheet, AP2155MPG-13 pinout, AP2155MPG-13 application, or AP2155MPG-13 equivalent, key selection criteria include enable polarity (active-high), thermal shutdown threshold (+135°C), 7ms FLG deglitch timing, reverse current blocking capability, and MSOP-8EP package thermal performance (θ_JA = 60°C/W).

Technical Context

The AP2155 integrates a precision current-sense FET and deglitched open-drain FLG output to distinguish transient overloads from sustained faults. Its UVLO circuit disables the switch below 1.9V input, ensuring safe hot-plug sequencing. The internal driver provides controlled 0.6ms rise time to limit dI/dt during power-up.

Thermal protection uses die-temperature sensing with +25°C hysteresis, cycling the switch off at ~+140°C and restoring operation only after cooling. Reverse current blocking prevents backfeed when input collapses, critical for multi-rail systems where downstream capacitance may hold voltage.

Key Specifications

Pinout & Package

AP2155MPG-13 is housed in an MSOP-8EP (exposed pad) package optimized for thermal dissipation in space-constrained USB applications. The exposed pad must be soldered to a PCB ground plane with thermal vias to achieve θ_JA = 60°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AP2145MPG-13, the AP2155MPG-13 offers simplified MCU interface via active-high EN, while TCK112G trades UVLO and lower R_DS(ON) for lower unit cost - making AP2155 optimal for new USB 2.0 designs prioritizing ease of control and thermal efficiency.

Availability

AP2155MPG-13 is available at Aetrix Electronics and suitable for USB 2.0 port control, laptop docking stations, and industrial USB accessories requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.

Supply support for AP2155MPG-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 power management, signal integrity, and protection solutions for consumer, industrial, and computing markets.

The AP21xx family targets USB and hot-swap power distribution, delivering integrated protection, precise current limiting, and compact packaging for space- and reliability-critical portable systems.

FAQ

What is the maximum continuous output current supported by AP2155MPG-13?

The AP2155MPG-13 is rated for 0.5A continuous load current per the manufacturer's recommended operating conditions. This limit ensures safe thermal operation within the MSOP-8EP package at +85°C ambient, assuming proper PCB thermal design with the exposed pad connected to ground plane and thermal vias.

Does AP2155MPG-13 provide reverse current blocking, and how does it function?

Yes, AP2155MPG-13 blocks reverse current flow from OUT to IN when the switch is disabled and VIN drops to zero. This is achieved through internal MOSFET architecture that prevents backfeed - eliminating the need for an external Schottky diode in battery-backed or multi-rail systems where downstream capacitance could otherwise discharge into the input rail.

How does the 7ms FLG deglitch timeout improve system reliability?

The 7ms deglitch on the FLG pin prevents false over-current assertions during benign transients such as bulk capacitor charging at power-up. Without this feature, momentary inrush currents would trigger unnecessary fault interrupts or system resets. The deglitch is fully internal - no external components are needed to implement reliable fault detection.

Can AP2155MPG-13 be used in automotive applications?

No - AP2155MPG-13 is specified for industrial and commercial temperature ranges (−40°C to +85°C) and lacks AEC-Q100 qualification, extended temperature grade, or automotive-specific reliability testing. For automotive USB power switches, Diodes Incorporated recommends the AEC-Q100 qualified AP22653Q or AP22916Q series instead.