Diodes Incorporated AP22804BSN-7

Overview

AP22804BSN-7 from Diodes Incorporated is a single-channel, current-limited, high-side load switch optimized for USB and hot-swap applications. It features 50 mΩ R_DS(ON), 2.7–5.5 V input range, 2.5 A continuous output current (AP22804), active-low enable, and integrated reverse-current blocking, over-current/over-temperature/short-circuit protection with auto-recovery. It is used in ultrabook power sequencing and SSD power rail control.

For engineers reviewing the AP22804BSN-7 datasheet, AP22804BSN-7 pinout, AP22804BSN-7 application, or AP22804BSN-7 equivalent, key selection criteria include its 6 ms FLG deglitch timeout, 0.6 ms typical rise time with soft-start, U-DFN2020-6 thermal performance (R_θJA = 100 °C/W), reverse-voltage trip at 50 mV, and 140 °C thermal shutdown threshold.

Technical Context

The AP22804BSN-7 implements an N-channel MOSFET high-side switch with integrated current-sense FET and thermal sensing circuitry. Its UVLO activates at 2.0 V (with 180 mV hysteresis) and disables the switch below that threshold, enabling safe hot-plug operation.

It delivers controlled turn-on via internal soft-start (typ. 0.6 ms rise time), supports reverse-voltage protection by disabling the MOSFET when V_OUT exceeds V_IN by ≥50 mV for ≥6 ms, and provides open-drain FLG reporting with built-in 6 ms blanking to suppress false fault triggers during capacitive inrush.

Key Specifications

Pinout & Package

AP22804BSN-7 is housed in a RoHS-compliant, thermally enhanced U-DFN2020-6 package with exposed thermal pad (recommended to be connected to PCB ground plane).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AP22804AW5-7, the AP22804BSN-7 offers superior thermal performance and smaller footprint; versus TCK107AG,TL, it delivers integrated discharge and reverse-voltage blocking-reducing component count and improving system-level reliability in USB and SSD applications.

Availability

AP22804BSN-7 is available at Aetrix Electronics and suitable for ultrabook power sequencing, SSD power rail control, and set-top box USB port protection requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for AP22804BSN-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 computing, consumer, and industrial markets.

The AP22804/AP22814 family targets USB-compliant hot-swap and power-distribution applications, delivering integrated protection, precise current limiting, and compact packaging for space-constrained portable and embedded systems.

FAQ

What is the function of the FLG pin and how does its deglitching work?

The FLG pin is an open-drain fault indicator that asserts low after a 6 ms deglitch timeout when over-current or over-temperature conditions occur. This blanking period prevents false triggering during transient inrush events-such as charging large output capacitors-without requiring external RC filtering. The pin remains low until both fault conditions are cleared, enabling reliable system-level fault monitoring.

Does AP22804BSN-7 require external components for basic operation?

No external components are required for core functionality: UVLO, soft-start, FLG deglitch, output discharge, and all protection features are fully integrated. However, per datasheet requirements, a 1 μF ceramic capacitor must be placed between IN and GND, and a 0.1 μF ceramic plus ≥100 μF bulk capacitor must be placed between OUT and GND to ensure stability, EMI suppression, and safe hot-swap behavior.

How does reverse-voltage protection operate and what is its trip threshold?

Reverse-voltage protection monitors the difference between V_OUT and V_IN. When V_OUT exceeds V_IN by ≥50 mV for ≥6 ms, the internal MOSFET turns off to block reverse current flow. Once the condition is removed, the device automatically resumes normal operation after a recovery delay. This protects upstream supplies from backfeed in multi-rail or hot-plug scenarios.

Can AP22804BSN-7 be used in 3.3 V-only systems, and what is its minimum operating voltage?

Yes, AP22804BSN-7 operates down to 2.7 V input, making it fully compatible with 3.3 V systems. Its under-voltage lockout (UVLO) activates at 2.0 V (with 180 mV hysteresis), ensuring the switch remains off until the supply reaches a stable 2.0 V, and disables cleanly if voltage drops below that threshold-critical for graceful shutdown in brown-out conditions.