Diodes Incorporated PI5PD2065WEX

Overview

PI5PD2065WEX from Diodes Incorporated is a 70mΩ high-side N-channel MOSFET power-distribution switch optimized for USB 5V bus power control, delivering 1.5A continuous current, 2.3A typical over-current trip threshold, and reverse current blocking - deployed in laptop motherboard USB hubs and self-powered peripherals.

For engineers reviewing the PI5PD2065WEX datasheet, PI5PD2065WEX pinout, PI5PD2065WEX application, or PI5PD2065WEX equivalent, key selection criteria include its active-high enable logic (vs. PI5PD2061's active-low), thermal shutdown at 135°C with 10°C hysteresis, 0.6ms typical rise time at 5.5V, and UL recognition (E341484) for safety-critical USB power rail designs.

Technical Context

The PI5PD2065WEX integrates a charge-pump gate driver to fully enhance its internal 70mΩ N-channel MOSFET across 2.7–5.5V input range, enabling robust USB-compliant voltage drop performance. Its constant-current limiting activates at 2.3A (typ.), with deglitched /OC reporting and automatic thermal recovery.

It features under-voltage lockout (UVLO) with ~2.0V turn-on threshold and 75mV hysteresis, ensuring clean startup behavior. The /OC pin is open-drain with 4–15ms deglitch timing and supports external pull-up for fault signaling to host controllers in USB hub architectures.

Key Specifications

Pinout & Package

PI5PD2065WEX is packaged in lead-free, green SOIC-8 (WE) with exposed pad for thermal enhancement. Pin mapping is validated per Diodes Inc. PT0316-4 Rev. 4 (2013).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TUSB2036IRHBR and AP22653AW5-7, PI5PD2065WEX uniquely combines UL E341484 certification, 0.2µA ultra-low standby, and deglitched /OC reporting - making it the only option qualified for certified USB host implementations requiring both safety compliance and precise fault diagnostics.

Availability

PI5PD2065WEX is available at Aetrix Electronics and suitable for USB host port switching, laptop motherboard power management, and TV/STB USB protection requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for PI5PD2065WEX 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 semiconductor company specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and connectivity applications.

The PI5PD2065WEX belongs to Diodes' PI5PD family of USB power-distribution switches, engineered specifically for compliant, high-reliability USB 2.0/3.0 host and peripheral power rail control with integrated protection.

FAQ

What is the function of the /OC pin, and how should it be interfaced?

The /OC pin is an open-drain output that asserts low during over-current or thermal shutdown events. It requires an external pull-up resistor (typically 100 kΩ to 3.3V or 5V) to generate a valid logic-high signal when idle. Its 4–15ms deglitch timing prevents false triggers from transient surges, and it remains latched low until the fault condition clears - enabling reliable host-side fault detection without polling.

Does PI5PD2065WEX support reverse current blocking, and under what conditions?

Yes - PI5PD2065WEX provides active reverse current blocking when disabled (EN = low). With IN grounded and OUT biased to 5.5V, reverse leakage is limited to 0.1 µA at 25°C. This prevents backfeeding from downstream loads into the upstream VBUS rail, a critical requirement in multi-port USB hubs where ports share common power sources.

How does the thermal shutdown behavior differ from standard over-current limiting?

Over-current limiting operates continuously in constant-current mode (2.3A typ.) during overload, while thermal shutdown activates only when junction temperature reaches 135°C due to sustained power dissipation. After shutdown, the device cools and automatically recovers at 125°C (10°C hysteresis), cycling until the fault is removed - unlike current-limiting, which sustains output indefinitely if within thermal limits.

Can PI5PD2065WEX operate from a 3.3V input supply, and what is its R_DS(on) at that voltage?

Yes - PI5PD2065WEX operates across 2.7V to 5.5V. At 3.3V input and 1.0A load, R_DS(on) is 70 mΩ (typ.), confirmed per electrical characteristics table. Its integrated charge pump ensures full gate enhancement even at minimum VIN, maintaining low conduction loss and meeting USB voltage-drop requirements in 3.3V-sourced embedded applications.