onsemi NCP374MU075TXG

Overview

NCP374MU075TXG from onsemi is a dual-direction overvoltage and overcurrent protection IC for USB power path management, featuring ±28 V bidirectional OVP, 750 mA programmable current limit (I_OCP), thermal shutdown at 150 °C, and open-drain FLAG fault indicator. It serves as a front-end load switch between IN (PMIC/charger input) and VBUS (USB connector), protecting host systems in portable and USB-powered devices.

For engineers reviewing the NCP374MU075TXG datasheet, pinout, applications, or equivalent options, key selection criteria include its back-to-back NMOS architecture for reverse-polarity protection, adjustable OCP via Ilim resistor, OVLO threshold of 5.77 V with 65 mV hysteresis, and LLGA-12 4×4 mm package with exposed thermal pad.

Technical Context

The NCP374MU075TXG implements a dual-MOSFET charge pump–driven gate control architecture to enable bidirectional voltage protection: positive OVP up to +28 V and negative OVP down to −28 V across VBUS pins, with independent UVLO (2.7 V) and OVLO (5.77 V) comparators. Its core logic supports three operational modes-Charge (DIR=0, EN=1), VBUS (DIR=1, EN=0), and Disable (DIR=1, EN=1)-each enabling distinct protection sets.

Current regulation is achieved by sensing voltage drop across an internal sense element referenced to the Ilim pin, where R_ILIM = 22 Ω yields 750 mA nominal OCP. Thermal shutdown activates at 150 °C with 30 °C hysteresis, and FLAG asserts low for OVLO, UVLO, OCP, or thermal events-requiring external 10 kΩ pull-up to V_BAT.

Key Specifications

Pinout & Package

Package: LLGA-12 (Case 513AP), 4 mm × 4 mm, 0.5 mm pitch, Pb-free, with exposed thermal pad (PAD1) requiring isolation from all other potentials.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TUSB544RGET and TPD3S014RSBR, the NCP374MU075TXG uniquely delivers bidirectional ±28 V protection, programmable 750 mA current limiting, and thermal shutdown with auto-recovery-making it optimal for ruggedized USB power path designs where polarity reversal and precise OCP are critical.

Availability

NCP374MU075TXG is available at Aetrix Electronics and suitable for USB host port protection, portable device charging circuits, USB-C accessory interfaces, and industrial USB hub power management requiring stable component supply and long-term lifecycle support.

Supply support for NCP374MU075TXG 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 manufacturer specializing in energy-efficient power management, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and IoT applications.

The NCP374MU075TXG belongs to onsemi's USB power path protection product line, designed specifically to safeguard sensitive downstream circuitry from overvoltage, reverse polarity, overcurrent, and thermal overload in portable and embedded USB systems.

FAQ

What is the maximum continuous current rating for NCP374MU075TXG?

The NCP374MU075TXG is rated for 750 mA continuous current in VBUS mode, as specified in its ordering designation and confirmed in the Electrical Characteristics table (I_OCP = 600–900 mA, typical 750 mA). This value is set by a 22 Ω resistor on the Ilim pin and assumes operation within −40°C to +85°C ambient temperature with adequate PCB thermal relief via the exposed PAD1.

Does NCP374MU075TXG support reverse polarity protection?

Yes, the NCP374MU075TXG provides full reverse polarity protection down to −28 V on the VBUS pins using its internal back-to-back NMOS architecture. When negative voltage is applied to VBUS, the device disconnects IN from VBUS automatically-regardless of DIR/EN state-and asserts FLAG low. This capability is explicitly verified in the Absolute Maximum Ratings (−30 V min) and Functional Block Diagram.

How is overvoltage lockout (OVLO) configured on NCP374MU075TXG?

The NCP374MU075TXG features a fixed OVLO threshold of 5.77 V (typical) with 65 mV hysteresis, as documented in the Electrical Characteristics table. No external configuration is required-the comparator is internal and active in all operational modes. FLAG goes low when VBUS exceeds this threshold, and the device remains latched off until VBUS falls below (5.77 V − 65 mV) = 5.705 V.

What package type and thermal requirements apply to NCP374MU075TXG?

The NCP374MU075TXG uses the LLGA-12 (Case 513AP) 4×4 mm package with 0.5 mm pitch and an exposed thermal pad (PAD1). Per the datasheet, PAD1 must connect to an isolated copper area-not GND or signal layers-to achieve R_JA ≤ 80 °C/W. Failure to isolate PAD1 risks thermal shutdown activation under 750 mA load.

Can NCP374MU075TXG be used in both charge and VBUS modes simultaneously?

No, the NCP374MU075TXG operates exclusively in one mode at a time, determined by the logic states of DIR and EN pins per Table 1. Charge mode (DIR=0, EN=1) enables protection from VBUS to IN; VBUS mode (DIR=1, EN=0) enables protection from IN to VBUS; Disable mode (DIR=1, EN=1) turns off all conduction. Simultaneous bidirectional conduction is not supported.