Diodes Incorporated PI5PD2041BTAEX

Overview

PI5PD2041BTAEX from Pericom Semiconductor is a 70mΩ high-side N-channel MOSFET power-distribution switch with active-low enable, 0.5A continuous current rating, 1.0A typical current limit, and integrated thermal/short-circuit protection - designed for USB host and self-powered hub power rail control in laptop motherboards and set-top boxes.

For engineers reviewing the PI5PD2041BTAEX datasheet, PI5PD2041BTAEX pinout, PI5PD2041BTAEX application, or PI5PD2041BTAEX equivalent, key selection criteria include its 2.7V–5.5V operating range, 0.6ms typical rise time, reverse-current blocking, <1μA standby supply current, and open-drain /OC fault reporting with deglitching.

Technical Context

This device implements a charge-pump–driven high-side N-MOSFET switch to meet USB voltage-drop requirements while enabling precise current limiting and automatic thermal shutdown recovery. Its /EN logic interface is TTL/CMOS-compatible and asserts /OC (open-drain, active-low) on over-current or junction temperature ≥135°C.

The internal UVLO circuit disables the switch below ~2.0V input, and hysteresis (~75mV) prevents chatter during brown-out. Reverse current blocking is achieved via body-diode orientation and gate control, eliminating external back-to-back FETs in battery-powered hot-plug applications.

Key Specifications

Pinout & Package

SOT23-5 package (lead-free, green, tape-and-reel), 1.6mm × 2.9mm footprint, 1.1mm height - optimized for space-constrained USB port power rails on motherboard edge connectors and compact hubs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TUSB2036IRHBR and TPS2051BDBVR, PI5PD2041BTAEX uniquely combines active-low enable, reverse-current blocking, and deglitched /OC reporting in a 0.5A/70mΩ SOT23-5 package - making it optimal for discrete, diagnostic-capable USB power switching where space and fault visibility are critical.

Availability

PI5PD2041BTAEX is available at Aetrix Electronics and suitable for laptop motherboard designs, USB host controllers, set-top box power management, and bus-powered hub implementations requiring stable component supply and long-term industrial availability.

Supply support for PI5PD2041BTAEX 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

Pericom Semiconductor (now part of Diodes Incorporated) specialized in high-speed interface, timing, and power-management ICs for computing, communications, and consumer electronics before acquisition in 2016.

The PI5PD2041B belongs to Pericom's USB power-distribution switch product line - engineered specifically for reliable, low-footprint, current-limited VBUS control in host, hub, and peripheral applications compliant with USB 2.0 specifications.

FAQ

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

The /OC pin is an open-drain, active-low fault indicator that asserts low during over-current or thermal shutdown events. It requires an external pull-up resistor (typically 100kΩ to 3.3V or 5V) to generate a valid logic signal. The 14ms deglitch filter ensures only sustained faults trigger reporting, rejecting brief transients. This signal connects directly to a microcontroller GPIO or USB controller interrupt pin for real-time fault handling without additional conditioning circuitry.

Does PI5PD2041BTAEX support reverse current blocking, and how is it implemented?

Yes - PI5PD2041BTAEX blocks reverse current flow from OUT to IN when disabled, using internal gate control to keep the N-channel MOSFET's body diode reverse-biased. This eliminates the need for external back-to-back FETs or Schottky diodes in battery backup or hot-plug applications. The blocking is inherent to the high-side switch architecture and requires no configuration or external components.

How does the thermal shutdown recovery behavior work in practice?

When junction temperature reaches ~135°C under overload, the device shuts off and holds /OC low. Recovery begins automatically once the die cools by ~10°C (to ~125°C), at which point the switch re-enables. If the fault persists, it cycles on/off - a "hiccup mode" that limits average power dissipation and prevents permanent damage. This behavior is fully internal and requires no external reset or intervention.

Can PI5PD2041BTAEX operate reliably at 2.7V input, and what performance changes occur?

Yes - it is fully specified from 2.7V to 5.5V. At 2.7V, R_DS(on) increases to 75mΩ (typ.), rise time decreases to 0.4ms, and current limit remains stable at 1.0A (typ.). The charge pump maintains sufficient gate drive, and UVLO hysteresis (75mV) ensures clean turn-on. All protections - including /OC assertion and thermal shutdown - remain functional across the full voltage range.