Diodes Incorporated PI5USB8000QZHEX

Overview

PI5USB8000QZHEX from Pericom Semiconductor is a USB power switch and intelligent charger controller IC supporting SDP, DCP, CDP (USB BC 1.0–1.2), Apple-1A/2A, and YD/T-1591 charging protocols. It integrates an 85 mΩ VBUS switch, dual current-limit thresholds (1.1–2.8 A), 4 µs over-current response, and USB 2.0 signal pass-through with <4 Ω on-resistance. Used in notebook USB ports, wall chargers, and docking stations to enable fast, protocol-aware charging of smartphones and tablets.

For engineers reviewing the PI5USB8000QZHEX datasheet, PI5USB8000QZHEX pinout, PI5USB8000QZHEX application, or PI5USB8000QZHEX equivalent, key selection criteria include multi-protocol detection accuracy, thermal shutdown at 135°C, PE# plug-in/out signaling, ILIM_SEL dynamic current limit switching, and AEC-Q100 qualification for automotive-adjacent systems.

Technical Context

The PI5USB8000QZHEX implements a dual-path architecture: one path handles VBUS power switching with adjustable current limiting via external resistors on ILIM0/ILIM1, and the other manages USB data line (D+/D−) routing and protocol negotiation using CTL1–CTL3 control inputs and internal state machines for SDP/CDP/DCP modes. Its integrated charge pump enables reliable DCP/CDP handshake timing per USB BC 1.2.

It supports system-level power states (S0–S5) via CTL logic combinations, enabling mouse/keyboard pass-through in S3 with automatic transition to auto-detect charging mode upon disconnection. Plug-in detection triggers PE# assertion only during PowerNAP (S3/S4/S5), while FAULT# provides de-glitched over-temperature and over-current reporting with 2 ms filtering.

Key Specifications

Pinout & Package

PI5USB8000QZHEX is housed in a 16-contact Thin Quad Flat No-Lead (TQFN) package with exposed thermal pad (Package Code ZH). The 3 mm × 3 mm footprint supports high-density PCB layouts and efficient heat dissipation through the GND-connected center pad.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar USB charging controller applications.

Compared with TPS65987D and NB3N3020B, the PI5USB8000QZHEX uniquely integrates protocol detection, power switching, current limiting, and plug-event signaling in one AEC-Q100-qualified TQFN package-enabling drop-in replacement of legacy USB-A charging circuits without firmware changes or external FETs.

Availability

PI5USB8000QZHEX is available at Aetrix Electronics and suitable for laptop docking stations, smart wall chargers, automotive infotainment USB ports, and industrial docking solutions requiring stable component supply and long-term lifecycle support.

Supply support for PI5USB8000QZHEX 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 and power management ICs for computing, communications, and consumer electronics before its 2016 acquisition.

The PI5USB8000QZHEX belongs to Pericom's FAST Charger family, designed specifically to simplify USB charging port implementation in space-constrained, cost-sensitive applications requiring broad protocol coverage and robust thermal performance.

FAQ

What charging protocols does the PI5USB8000QZHEX support without external firmware?

The PI5USB8000QZHEX supports USB Battery Charging Specifications 1.0, 1.1, and 1.2 (SDP, DCP, CDP), Apple-1A and Apple-2A proprietary modes, and the Chinese YD/T-1591 telecom standard-all implemented in hardware with no microcontroller or firmware required. Detection is performed by analog comparators and state machines embedded in the silicon, ensuring deterministic timing and protocol compliance across temperature and voltage ranges.

How does the ILIM_SEL pin affect current limiting behavior?

The ILIM_SEL pin selects between two independent current-limit thresholds set by external resistors on ILIM0 and ILIM1 pins. When ILIM_SEL is logic low, the IC uses the resistor on ILIM0 to define the OCP threshold (e.g., 1.2 A); when high, it uses ILIM1 (e.g., 2.5 A). This allows dynamic reconfiguration of charging current during system operation-such as lowering current for legacy devices and raising it for iPads-without changing hardware or resetting the IC.

Can the PI5USB8000QZHEX operate in S3 sleep mode while maintaining USB device detection?

Yes-the PI5USB8000QZHEX supports PowerNAP mode in S3, S4, and S5 states. When configured with CTL1=0, CTL2=1, CTL3=1, it enables D+/D− pass-through for keyboard/mouse enumeration and asserts PE# within 100 ms of device attachment. This allows the host system to remain in low-power state while still detecting peripheral presence and initiating wake-up or charging only when needed.

What is the role of the exposed thermal pad (Pin 17) and how should it be connected?

The exposed thermal pad (Pin 17) is internally connected to GND and serves as the primary heat dissipation path. It must be soldered to a minimum 100 mm² copper pour on the PCB, thermally connected to inner-layer ground planes via ≥4 vias (0.3 mm diameter), and not left floating. Proper thermal pad connection reduces junction-to-ambient thermal resistance by up to 35 °C/W, enabling continuous 2.8 A operation at +85 °C ambient without thermal shutdown.