Diodes Incorporated AP22816BKEWT-7

Overview

AP22816BKEWT-7 from Diodes Incorporated is a single-channel, active-low enable, high-side load switch optimized for USB 2.0/3.x hot-swap applications. It delivers 1.0A continuous output current with 75mΩ typical R_DS(ON), integrated reverse-current blocking, 6ms deglitched fault flag (FLG), and soft-start with 2.1ms typical rise time. Designed for ultrabooks and SSD power sequencing, it operates across 2.7V–5.5V input and includes overcurrent, short-circuit, overtemperature, and UVLO protection.

For engineers reviewing the AP22816BKEWT-7 datasheet, AP22816BKEWT-7 pinout, AP22816BKEWT-7 application, or AP22816BKEWT-7 equivalent, key selection criteria include active-low EN logic compatibility, TSOT25 package thermal performance (R_θJA = 123°C/W), FLG timing behavior under transient overload, and reverse-voltage trip point (70mV typ.) in USB VBUS isolation scenarios.

Technical Context

The AP22816BKEWT-7 implements a thermally robust N-channel MOSFET high-side switch with bi-directional current sensing and integrated discharge FET. Its control architecture combines analog current-limit thresholding (1.5A typ. ILIMIT at 4.5V VOUT) with digital deglitch logic on the open-drain FLG output to suppress false fault reporting during capacitive inrush.

UVLO activation at 2.3V (rising) with 180mV hysteresis ensures clean turn-on after power rail stabilization, while reverse-voltage protection triggers at 70mV differential (VOUT – VIN) with 5ms typical response, enabling safe VBUS-to-peripheral isolation in dual-power-domain systems.

Key Specifications

Pinout & Package

AP22816BKEWT-7 is housed in a RoHS-compliant, lead-free TSOT25 (SOT-25) package with matte tin-plated leads, rated Moisture Sensitivity Level 1 per J-STD-020. Thermal resistance is 123°C/W (Junction-to-Ambient) on standard FR-4 PCB layout.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TCK107AG and TPS22916BLYFPR, AP22816BKEWT-7 uniquely combines active-low EN, integrated discharge, and 70mV reverse-voltage trip in TSOT25 - making it optimal for compact USB host designs requiring fail-safe isolation without added components.

Availability

AP22816BKEWT-7 is available at Aetrix Electronics and suitable for USB 3.x peripheral power switching, ultrabook power sequencing, and SSD module isolation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for AP22816BKEWT-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, industrial, and consumer markets.

The AP22816/17/18 family targets USB-compliant hot-swap power distribution, emphasizing robust fault handling, minimal external components, and thermal resilience in ultra-thin portable platforms.

FAQ

What is the maximum allowable output capacitance before FLG false triggering occurs?

The AP22816BKEWT-7's 6ms FLG deglitch window accommodates output capacitors up to 470μF under typical 3.3V input conditions, as verified in Figure 1 of DS43535 Rev. 3-2. For 120μF loads common in USB SSDs, inrush current remains below the 1.5A ILIMIT threshold for <2ms, ensuring reliable non-trip operation during power-up.

Does AP22816BKEWT-7 support reverse-voltage protection when VOUT exceeds VIN by less than 50mV?

No - reverse-voltage protection activates only when VOUT exceeds VIN by ≥35mV (min), with 70mV typical trip point and 105mV max, per Electrical Characteristics table. Transients below 35mV do not trigger MOSFET turn-off, preserving functionality during minor rail imbalances.

Can the FLG pin drive an LED directly without a current-limiting resistor?

No - FLG is an open-drain output with 30Ω typical on-resistance and 60Ω max. Driving an LED directly risks exceeding its forward current rating; a minimum 1kΩ pull-up to 3.3V/5V is required, and LED current must be limited externally to ≤10mA per Absolute Maximum Ratings.

Is thermal derating required when operating at 85°C ambient with 1.0A load?

Yes - at TA = +85°C, junction temperature rises to ~122°C (PD = 0.075Ω × 1A² = 75mW; TJ = 75mW × 123°C/W + 85°C), staying below the 150°C absolute max. However, sustained operation above 70°C ambient warrants PCB copper pour under the TSOT25 pad to maintain margin against thermal shutdown.