onsemi NCP347MTAITBG

Overview

NCP347MTAITBG from onsemi is a positive overvoltage protection controller with integrated 65 mΩ NMOS FET, UVLO (2.95 V typ), OVLO (5.85 V typ), and open-drain FLAG output - designed for battery-powered portable electronics requiring robust input voltage fault detection and automatic output disconnect up to +28 V.

For engineers reviewing the NCP347MTAITBG datasheet, pinout, applications, or equivalent options, this page delivers verified electrical thresholds, WDFN-10 package details, startup timing (50 ms), ESD ratings (15 kV air), and real-world fault response behavior - all confirmed from onsemi's official Rev. 5 datasheet.

Technical Context

The NCP347MTAITBG implements dual-threshold voltage monitoring with independent UVLO (2.95 V typ, 60 mV hysteresis) and OVLO (5.85 V typ, 90 mV hysteresis) comparators driving an internal gate driver that controls the integrated 65 mΩ NMOS FET. Fault detection triggers immediate output disconnect (<5 µs turn-off time) and pulls the open-drain FLAG low within 1.0 µs.

It features an internal charge pump enabling full NMOS gate drive from input voltages as low as 2.8 V, a 50 ms startup delay after UVLO crossing, and EN-controlled shutdown independent of fault status. The device operates across −40 °C to +85 °C and supports IEC61000-4-2 Level 4 ESD (8 kV contact / 15 kV air) when bypassed with ≥1.0 µF capacitor on IN.

Key Specifications

Pinout & Package

Package: WDFN-10 (2.5 mm × 2.0 mm, 0.5 mm pitch, Case 516AA, Pb-free). Exposed thermal pad PAD2 electrically connected to internal NMOS drain (pins 4 & 5); PAD1 isolated and recommended for grounding.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS259211RGER and MAX16054ATA+, the NCP347MTAITBG uniquely combines integrated 65 mΩ FET, 2.95 V UVLO with 60 mV hysteresis, 50 ms startup delay, and 15 kV ESD immunity in a 2.5×2 mm footprint - making it optimal for cost-sensitive, size-constrained consumer electronics where seamless power sequencing and robust ESD survival are mandatory.

Availability

NCP347MTAITBG is available at Aetrix Electronics and suitable for smartphone charging protection, digital camera power management, MP3 player battery interface, portable medical monitor input stages, and other applications requiring stable component supply with guaranteed long-term continuity.

Supply support for NCP347MTAITBG 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 NCP347MTAITBG belongs to onsemi's Overvoltage Protection Controller product line, engineered specifically for portable electronics requiring compact, integrated, and ESD-hardened input protection without external FETs or drivers.

FAQ

What is the exact overvoltage lockout (OVLO) threshold for NCP347MTAITBG?

The NCP347MTAITBG has a nominal OVLO threshold of 5.85 V, with a guaranteed range of 5.70 V to 6.00 V at +25 °C. This value is laser-trimmed during manufacturing and documented in Table 4 of the onsemi datasheet Rev. 5. The 90 mV hysteresis prevents chatter during slow-rising overvoltage transients. NCP347MTAITBG is part of the "I" variant family, distinct from "E", "F", and "H" versions with different OVLO points.

Does NCP347MTAITBG require an external MOSFET for overvoltage protection?

No, the NCP347MTAITBG integrates a 65 mΩ NMOS FET with rated 2.0 A continuous current capability. Its internal power switch eliminates the need for external discrete MOSFETs, gate drivers, or charge pump circuits - reducing total solution size and bill-of-materials cost. The device uses an internal charge pump to fully enhance the NMOS gate even at input voltages as low as 2.8 V.

How does the FLAG pin behave during startup and fault conditions for NCP347MTAITBG?

During normal startup (EN = GND), the FLAG pin remains low until VIN exceeds UVLO (2.95 V), then goes high after a 50 ms delay following VOUT rise - ensuring synchronized fault reporting. During overvoltage or undervoltage faults, FLAG pulls low within 1.0 µs and stays low until VIN returns to the safe window (UVLO < VIN < OVLO) and remains stable for >50 ms. FLAG is open-drain and requires an external pull-up resistor.

What is the thermal performance of NCP347MTAITBG under 2 A load?

With proper PCB layout - including direct connection of PAD2 to ≥30 mm² copper pour (1 oz) - the NCP347MTAITBG achieves a thermal resistance of ~268 °C/W, limiting junction temperature rise to approximately 54 °C at 2 A and 65 mΩ R_DS(on). This enables reliable operation at full rated current in ambient temperatures up to +85 °C without forced airflow, per Figure 20 in the datasheet.

Is NCP347MTAITBG still actively manufactured or discontinued?

The NCP347MTAITBG is marked as discontinued in onsemi's official datasheet Rev. 5 (January 2026), alongside NCP347MTAHTBG. While no new production is planned, Aetrix Electronics maintains legacy inventory and offers lifecycle support including last-time-buy planning, cross-reference guidance, and obsolescence mitigation for existing designs using NCP347MTAITBG.