onsemi NCP360MUTBG

Overview

NCP360MUTBG from onsemi is a USB-positive overvoltage protection controller with integrated PMOS FET, designed to disconnect downstream systems during VBUS overvoltage events up to +20 V. It features 5.675 V typical OVLO threshold, 3.0 V typical UVLO threshold, and an open-drain FLAG output for fault indication-used in mobile phone USB power rails to prevent damage from faulty chargers or hot-plug transients.

For engineers reviewing the NCP360MUTBG datasheet, pinout, applications, or equivalent options, this device delivers fast overvoltage response (<1.5 µs turn-off), thermal shutdown at 150 °C, ESD-protected input (15 kV air), and operates across −40 °C to +85 °C ambient-critical for compact, high-reliability portable electronics design.

Technical Context

The NCP360MUTBG implements dual voltage monitoring: UVLO activates below 3.0 V (50 mV hysteresis) to prevent erratic startup, while OVLO triggers above 5.675 V (50 mV hysteresis) to isolate the output within 1.5 µs. Its internal PMOS FET provides 600 mA continuous current capability with 200 mV max 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 pin that forces output disconnection when driven high. The device includes thermal shutdown with 30 °C hysteresis and complies with IEC61000−4−2 Level 4 ESD (8 kV contact / 15 kV air).

Key Specifications

Pinout & Package

Package: UDFN6 (2 mm × 2 mm, 0.65 mm pitch), Pb-free, with exposed thermal pad (PAD1) requiring connection to GND plane for optimal thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TUSB542IRWBR and TPD3S014TDR, the NCP360MUTBG uniquely combines programmable OVLO/UVLO, thermal shutdown, EN control, and FLAG signaling in a 2×2 mm UDFN-making it the only option for compact, sequenced, and fault-reporting USB power protection.

Availability

NCP360MUTBG is available at Aetrix Electronics and suitable for USB device protection, mobile phone power rail safeguarding, and portable peripheral overvoltage defense requiring stable component supply across production lifecycles.

Supply support for NCP360MUTBG 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 specializing in energy-efficient power management, analog, sensors, and connectivity solutions for automotive, industrial, and consumer markets.

The NCP360MUTBG belongs to onsemi's USB power protection controller family, engineered specifically for cost-sensitive, space-constrained portable electronics needing reliable, integrated overvoltage and undervoltage fault response without external components.

FAQ

What is the exact overvoltage lockout (OVLO) threshold for NCP360MUTBG?

The NCP360MUTBG has a typical OVLO threshold of 5.675 V, with min/max specification of 5.43 V to 5.9 V across temperature and process variation. This value is fixed per the MU/SN prefix coding scheme and verified per onsemi's datasheet Rev. 11. The NCP360MUTBG uses internal precision references to maintain tight OVLO tolerance without external resistors.

Does NCP360MUTBG require external components for basic operation?

Yes-the NCP360MUTBG requires a minimum 1 µF low-ESR ceramic capacitor between IN and GND for ESD filtering and transient suppression, plus an external pull-up resistor (typically 1 MΩ) on the FLAG pin due to its open-drain architecture. No external FET or voltage divider is needed, as the PMOS and threshold references are fully integrated into the NCP360MUTBG die.

Can NCP360MUTBG be used in automotive applications?

No-the NCP360MUTBG is not AEC-Q100 qualified. For automotive use, onsemi offers the NCV360SNT1G variant (with NCV prefix), which undergoes additional qualification testing and supports PPAP documentation. The NCP360MUTBG is rated for −40 °C to +85 °C ambient and intended for commercial/industrial portable electronics-not under-hood automotive environments.

How does the EN pin function on NCP360MUTBG?

The EN pin on NCP360MUTBG is an active-high enable input: driving it to >1.2 V forces the internal PMOS FET into cutoff, disconnecting OUT from IN regardless of input voltage conditions. When pulled to GND or a logic-low I/O, the NCP360MUTBG operates normally-monitoring OVLO/UVLO and asserting FLAG as needed. EN has no effect on fault detection timing or thresholds.

What thermal considerations apply to NCP360MUTBG in PCB layout?

The NCP360MUTBG's UDFN6 package includes an exposed thermal pad (PAD1) that must be soldered to a solid GND plane to achieve the specified 260 °C/W junction-to-air thermal resistance. Without this connection, R_JA rises to 305 °C/W (TSOP-5 equivalent), limiting continuous current to ~500 mA. Thermal measurement on the final board is recommended to validate performance under actual load and ambient conditions for the NCP360MUTBG.