onsemi NCP360MUTXG

Overview

NCP360MUTXG from onsemi is a USB-positive overvoltage protection controller with integrated PMOS FET, 5.675 V typical OVLO threshold, 3.0 V typical UVLO threshold, and open-drain FLAG output for fault indication - designed to protect downstream USB peripherals from VBUS overvoltage up to +20 V in mobile phone and portable device power paths.

For engineers reviewing the NCP360MUTXG datasheet, pinout, applications, or equivalent options, this page delivers verified package mapping (UDFN6, 2×2 mm), confirmed electrical thresholds, thermal shutdown behavior, ESD immunity (15 kV air), and real-world timing values including 0.8–1.5 µs output turn-off time and 1.0–2.0 µs alert delay.

Technical Context

The NCP360MUTXG implements dual voltage monitoring: UVLO activates below 2.85–3.15 V (50–90 mV hysteresis) to prevent operation during insufficient input, while OVLO triggers above 5.43–5.90 V (50–125 mV hysteresis) to disconnect the output within sub-microsecond response. Its internal PMOS FET provides 600 mA continuous current capability with 105–200 mV dropout at 500 mA.

FLAG is an open-drain output that pulls low upon OVLO detection and requires an external pull-up resistor; EN is an active-low enable input that forces output disconnection when high. The device includes thermal shutdown at 150 °C (30 °C hysteresis) and meets IEC61000-4-2 Level 4 ESD (8 kV contact / 15 kV air) on the IN pin when bypassed with ≥1 µF capacitor.

Key Specifications

Pinout & Package

Package: UDFN6 (2 mm × 2 mm, 0.65 mm pitch), exposed thermal pad (PAD1) for enhanced heat dissipation; Pb-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar overvoltage protection applications.

Compared with TPD3S014RTER and MAX16922ATP+T, the NCP360MUTXG offers fixed, USB-optimized thresholds, ultra-fast 1.5 µs response, and minimal 2×2 mm UDFN6 footprint - making it ideal for space-constrained consumer USB ports where simplicity, speed, and cost matter most.

Availability

NCP360MUTXG is available at Aetrix Electronics and suitable for USB mobile phone charging ports, portable media player power management, and industrial handheld scanner power interfaces requiring stable component supply across production lifecycles.

Supply support for NCP360MUTXG 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The NCP360MUTXG belongs to onsemi's USB power protection product line, engineered specifically to replace discrete MOSFET + comparator solutions in portable electronics - prioritizing ultra-fast response, minimal footprint, and system-level ESD resilience.

FAQ

What is the overvoltage lockout (OVLO) threshold for NCP360MUTXG?

The NCP360MUTXG has a typical OVLO threshold of 5.675 V, with a guaranteed range of 5.43 V to 5.90 V across temperature and process variation. This value is fixed for the MU suffix variant and is optimized to protect 5 V USB systems from overvoltage while allowing margin for ripple and tolerance. The OVLO hysteresis is 50–125 mV to prevent chatter during near-threshold conditions. NCP360MUTXG does not support external adjustment of this threshold.

Does NCP360MUTXG include undervoltage lockout (UVLO) functionality?

Yes, NCP360MUTXG includes built-in UVLO with a typical threshold of 3.0 V and a guaranteed range of 2.85 V to 3.15 V. UVLO prevents the device from enabling the output until the input voltage rises above this level, ensuring stable startup and avoiding erratic behavior during brownout conditions. Hysteresis is 50–90 mV to provide noise immunity. This function operates independently of the EN pin and remains active even when EN is asserted.

How is the FLAG pin used in NCP360MUTXG circuits?

The FLAG pin on NCP360MUTXG is an open-drain output that pulls low when the input voltage exceeds the OVLO threshold, signaling a fault condition to the host system. It requires an external pull-up resistor (typically 10 kΩ to 1 MΩ) to a valid logic supply (e.g., 3.3 V or 5 V). The pin remains low until Vin drops below OVLO − hysteresis. NCP360MUTXG does not drive FLAG high actively - the external resistor sets the idle state. This design simplifies interfacing with diverse microcontrollers and PMICs.

What package type and dimensions does NCP360MUTXG use?

NCP360MUTXG uses the UDFN6 (Ultra Thin DFN) package, case number 517AB, measuring 2.0 mm × 2.0 mm × 0.55 mm with 0.65 mm pin pitch. It features six signal terminals plus an exposed thermal pad (PAD1) on the bottom surface. The marking "ZD" appears on top, and the "MU" prefix in the part number explicitly identifies the UDFN6 variant. This compact, low-profile package supports high-density PCB layouts common in smartphones and wearables.

Can NCP360MUTXG handle 20 V input continuously?

No - NCP360MUTXG is rated for absolute maximum input voltage of 21 V, but its functional overvoltage protection window is up to +20 V only during fault conditions. Continuous operation above 5.9 V will trigger OVLO and disconnect the output. The device is designed to withstand 20 V transients (e.g., ESD, load dump) for short durations while protecting downstream circuitry. For sustained 20 V input, a different topology (e.g., buck converter + OVP) is required. NCP360MUTXG is not intended for continuous 20 V operation.