NXP Semiconductors NX18P3001UKZ

Overview

NX18P3001UKZ from NXP Semiconductors is a bidirectional high-side power switch with integrated ESD protection, designed for USB-OTG and charger port co-location in portable devices. It features 30 V-tolerant VBUSI, 62 mΩ typical R_ON at 5 V, 3 A continuous switch current, and automatic fault isolation via UVLO/OVLO/OTP. It enables battery charging and OTG power reversal in smart phones and tablets.

For engineers reviewing the NX18P3001UKZ datasheet, NX18P3001UKZ pinout, NX18P3001UKZ application, or NX18P3001UKZ equivalent, key selection criteria include bidirectional switching capability, 30 V VBUSI tolerance, WLCSP12 package constraints, and ACK-driven fault signaling in dual-role USB systems.

Technical Context

The NX18P3001UKZ integrates an N-channel MOSFET with logic-level translation on EN (1.8 V compatible), soft-start slew rate control, and independent overvoltage lockout (17.5 V threshold on VBUSI) and undervoltage lockout (3.2 V threshold on VBUSI/VBUSO). Its bidirectional operation allows VBUSI to serve as supply during charging and VBUSO as supply during OTG mode.

Protection circuitry includes thermal shutdown at 125 °C with 10 °C hysteresis, open-drain ACK output that sinks when OVLO or OTP activates, and low-capacitance (≤3 pF) ESD clamps on D−, D+, and ID pins compliant to IEC61000-4-2 (8 kV contact). All protections are disabled when EN is HIGH.

Key Specifications

Pinout & Package

Package: WLCSP12 (1.36 × 1.66 × 0.51 mm, backside coating included), wafer-level chip-scale package with 12 solder bumps.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bidirectional power switch applications.

Compared with TPS65987D and MAX14636, the NX18P3001UKZ delivers true hardware-based bidirectional switching in a minimal WLCSP12 footprint, with no firmware dependency and superior 30 V VBUSI tolerance-making it optimal for cost-sensitive, space-constrained dual-role USB ports where full PD negotiation is unnecessary.

Availability

NX18P3001UKZ is available at Aetrix Electronics and suitable for smartphone, tablet, and portable power bank designs requiring stable component supply, robust ESD protection, and seamless USB-OTG/charger integration.

Supply support for NX18P3001UKZ 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

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and mobile applications.

The NX18P3001UKZ belongs to NXP's USB power management portfolio, engineered specifically for space-constrained portable electronics needing reliable, low-loss bidirectional power routing without protocol overhead.

FAQ

What is the maximum continuous current rating of the NX18P3001UKZ?

The NX18P3001UKZ supports 3 A continuous switch current at ambient temperatures up to +85 °C, as specified in the Absolute Maximum Ratings table. This rating applies under recommended thermal conditions-including proper PCB copper pour and via placement per the datasheet's thermal guidelines-and ensures reliable operation during USB BC1.2 charging without derating in typical handheld form factors.

Does the NX18P3001UKZ support USB 2.0 data line protection?

Yes, the NX18P3001UKZ provides integrated ESD protection on D−, D+, and ID pins compliant to IEC61000-4-2 (±8 kV contact discharge) and maintains low signal capacitance (≤3 pF), preserving USB 2.0 high-speed (480 Mbps) signal integrity. No external TVS diodes are required on these lines when using the NX18P3001UKZ.

How does the ACK pin function during fault conditions?

The ACK pin on the NX18P3001UKZ is an open-drain output that pulls LOW when overvoltage lockout (OVLO) or overtemperature protection (OTP) activates. It returns to high-impedance state automatically once the fault condition clears or when EN is driven HIGH. An external pull-up resistor (10–200 kΩ to 1.65–5.5 V) is mandatory for proper operation.

Can the NX18P3001UKZ be used in USB-C applications?

The NX18P3001UKZ is designed for USB micro-AB and standard-A/B dual-role ports-not native USB-C. While it can manage VBUS in USB-C systems with external CC logic, it lacks USB-C-specific features like CC pin handling or PD message parsing. Use only in USB-C designs where VBUS switching is decoupled from CC negotiation and voltage requirements fall within its 3.2–17.5 V operating range.

What is the purpose of the EN pin's logic-level translation feature?

The EN pin on the NX18P3001UKZ accepts 1.8 V logic inputs while operating across its full 3.2–17.5 V supply range, enabling direct connection to low-voltage application processors without level-shifting circuitry. When EN is HIGH, all internal circuits-including the MOSFET and protection blocks-are disabled, reducing quiescent current to ≤16 µA.