onsemi NCP360SNAET1G

Overview

NCP360SNAET1G from onsemi is a USB-positive overvoltage protection controller with integrated PMOS FET, 6.25 V typical OVLO threshold, 3.0 V typical UVLO threshold, and open-drain FLAG output for fault indication - designed to protect downstream USB peripherals in mobile phones and portable devices against VBUS overvoltage up to +20 V.

For engineers reviewing the NCP360SNAET1G datasheet, pinout, applications, or equivalent options, this page delivers verified technical context, package-specific pin functions, real-world timing behavior (e.g., 1.0–2.0 µs alert delay), thermal shutdown at 150 °C, and validated alternative options for USB power rail protection.

Technical Context

The NCP360SNAET1G implements dual voltage monitoring: undervoltage lockout (UVLO) triggers at 3.0 V (±150 mV hysteresis) and overvoltage lockout (OVLO) at 6.25 V (±125 mV hysteresis), both independent of EN state. Its internal PMOS FET provides 600 mA current capability with 105–200 mV dropout at 500 mA, enabling direct integration without external pass devices.

FLAG is an open-drain output that pulls low within 1.0–2.0 µs of OVLO detection and requires an external pull-up resistor; EN is an active-low enable input with 0.4 V logic low threshold and 1.2 V logic high threshold, allowing system-level control without affecting fault response timing.

Key Specifications

Pinout & Package

Package: TSOP-5 (3.00 × 1.50 × 0.95 mm, 0.95 mm pitch), Pb-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NCP360SNAET1G, TUSB542IRWBR adds signal conditioning but removes fault visibility and UVLO control, while TPD3S014TDR increases current capacity and simplifies ESD design but sacrifices programmable enable and dual-threshold supervision.

Availability

NCP360SNAET1G is available at Aetrix Electronics and suitable for USB peripheral protection, mobile phone charging circuits, and portable device power management requiring stable component supply and long-term lifecycle support.

Supply support for NCP360SNAET1G 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, sensor, and connectivity solutions for automotive, industrial, and consumer markets.

The NCP360SNAET1G belongs to onsemi's USB power protection product line, engineered specifically for cost-sensitive, space-constrained portable electronics requiring robust, integrated overvoltage and undervoltage supervision without external components.

FAQ

What is the exact OVLO threshold for NCP360SNAET1G?

The NCP360SNAET1G has a typical overvoltage lockout (OVLO) threshold of 6.25 V, with a guaranteed range of 6.0 V to 6.5 V across temperature (−40 °C to +85 °C). This value is fixed per the part number coding: "E" in position 5 of NCP360SNAET1G denotes the 6.25 V OVLO variant, confirmed in the Selection Guide on page 11 of the datasheet.

Does NCP360SNAET1G include an internal PMOS FET?

Yes, NCP360SNAET1G integrates a PMOS FET rated for 600 mA continuous current. Its R_DS(on) results in a 105–200 mV dropout at 500 mA, eliminating the need for external pass transistors and reducing solution size. The FET is controlled solely by internal OVLO/UVLO comparators and the EN pin - no gate driver or external biasing is required.

How does the FLAG pin function on NCP360SNAET1G?

The FLAG pin on NCP360SNAET1G is an open-drain output that pulls low within 1.0–2.0 µs when input voltage exceeds the OVLO threshold (6.25 V) or falls below the UVLO threshold (3.0 V). It remains low until Vin returns to the valid window (3.0–6.25 V); an external pull-up resistor (typically 1 MΩ to VCC) is mandatory to establish a defined high state during normal operation.

What package type is used for NCP360SNAET1G?

NCP360SNAET1G uses the TSOP-5 package (Case 483), measuring 3.00 × 1.50 × 0.95 mm with 0.95 mm lead pitch. It is Pb-free and RoHS-compliant, marked with "AAP" per the ordering table on page 11. This 5-pin surface-mount package supports automated assembly and provides adequate thermal performance for ≤600 mA applications.

Is NCP360SNAET1G suitable for automotive applications?

No - NCP360SNAET1G is not qualified for automotive use. It is part of the commercial-grade NCP360 series. For automotive applications, onsemi offers the NCV360SNAET1G (with NCV prefix), which is AEC-Q100 qualified and PPAP capable. The "NCP" prefix explicitly indicates non-automotive grade, and the datasheet confirms NCV variants are designated for automotive and other high-reliability applications.