Diodes Incorporated AP2552FDC-7

Overview

AP2552FDC-7 from Diodes Incorporated is a single-channel, precision adjustable current-limited high-side power switch in U-DFN2020-6 (Type C) package, designed for USB-compliant hot-swap applications. It delivers up to 2.1A continuous load current, features ±6% current-limit accuracy at 1.632A (with 15kΩ ILIM resistor), and provides constant-current limiting during over-current events. Its 2µs typical short-circuit response time, reverse-current blocking, and integrated UVLO support robust protection in set-top boxes and LCD monitors.

For engineers reviewing the AP2552FDC-7 datasheet, AP2552FDC-7 pinout, AP2552FDC-7 application, or AP2552FDC-7 equivalent, key selection criteria include programmable current limit (75mA–2.36A), active-low enable logic, fault reporting with 7ms deglitch, thermal shutdown at +160°C, and compatibility with 2.7V–5.5V input rails in space-constrained USB power delivery systems.

Technical Context

The AP2552FDC-7 implements a precision current-sense FET architecture with external ILIM resistor programming, enabling accurate DC current limiting without series sense resistors. Its internal driver incorporates slew-rate control to limit dI/dt during turn-on, reducing inrush surges into heavy capacitive loads like USB ports.

It integrates multiple protection layers: under-voltage lockout (~2.5V), reverse-voltage detection (trip at 95–190mV), reverse-current limiting (0.72A), and thermal shutdown with 20°C hysteresis. The open-drain FAULT output asserts low during over-current, over-temperature, or reverse-voltage faults, with blanking times of 7.5ms (OCP) and 3.75ms (RV).

Key Specifications

Pinout & Package

AP2552FDC-7 is housed in a 2.0mm × 2.0mm U-DFN2020-6 (Type C) package with wettable flank leads and an exposed thermal pad (non-electrical, recommended tied to GND for thermal relief). Pin numbering follows top-view orientation per Diodes DS35404 Rev. 12–3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AP2552FDC-7, AP22652FDC-7 trades current accuracy and reverse protection for lower unit cost, while TPS22965DSGR sacrifices programmability and reverse-current blocking for faster response and TI ecosystem integration - making AP2552FDC-7 optimal for USB designs demanding tunable, bidirectionally protected power switching.

Availability

AP2552FDC-7 is available at Aetrix Electronics and suitable for USB 3.0 hubs, LCD monitor charging ports, and residential gateways requiring stable component supply, long-term lifecycle support, and RoHS-compliant "Green" packaging.

Supply support for AP2552FDC-7 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, industrial, and communications markets.

The AP2552/AP2553 family targets USB-compliant hot-swap power distribution, delivering precision current limiting, fast fault response, and integrated protection in ultra-compact packages for space-constrained portable and display electronics.

FAQ

What is the function of the ILIM pin, and how is current limit set?

The ILIM pin sources a precision current proportional to the desired current-limit threshold. A resistor (10kΩ–210kΩ) connected from ILIM to GND sets the limit: e.g., 15kΩ yields 1.632A ±6%. Layout best practice requires short, direct traces to minimize parasitic impedance and preserve accuracy across temperature.

Does AP2552FDC-7 support reverse-voltage protection, and how does it behave?

Yes - it detects reverse voltage (V_OUT – V_IN > 95–190mV) and blocks reverse current flow during shutdown. When enabled, it actively limits reverse current to 0.72A. The FAULT pin asserts low within 3.75–6ms of reverse-voltage onset, enabling system-level fault logging or shutdown.

How does the FAULT pin's deglitch timing affect system design?

The FAULT output includes a 7.5ms deglitch for over-current events, preventing false triggering from brief inrush or noise spikes. Designers must ensure MCU interrupt handlers or external logic allow ≥8ms minimum assertion duration to distinguish real faults from transients - critical for USB hot-plug reliability.

Can AP2552FDC-7 be used in automotive applications?

No - AP2552FDC-7 is qualified for industrial temperature range (–40°C to +85°C) and lacks AEC-Q100 qualification, PPAP documentation, or IATF 16949 manufacturing certification. For automotive use, Diodes recommends contacting their automotive team for qualified alternatives such as the AP2265x-A series.