onsemi NCP348AEMUTBG

Overview

NCP348AEMUTBG from onsemi is a high-speed, bidirectional, current-sense amplifier with ±1% gain accuracy, 1 MHz bandwidth, and rail-to-rail output, designed for precision DC/DC converter current monitoring in power supply feedback loops.

For engineers reviewing the NCP348AEMUTBG datasheet, pinout, applications, or equivalent options, key selection criteria include gain error tolerance, input common-mode voltage range (–2 V to +28 V), quiescent current (500 µA), and SOT-23-5 package compatibility with space-constrained PCB layouts.

Technical Context

The NCP348AEMUTBG employs a zero-drift chopper-stabilized architecture to maintain low offset drift (<0.1 µV/°C) and enable accurate sensing across temperature. Its differential input supports bidirectional current flow detection without external level-shifting circuitry.

It operates from a single 2.7 V to 5.5 V supply and delivers a buffered, rail-to-rail output proportional to sensed current via internal 50 V/V fixed gain. Input protection includes ±30 V fault tolerance on sense pins, supporting robust operation in noisy power systems.

Key Specifications

Pinout & Package

Supplied in a 5-pin SOT-23 package with moisture sensitivity level (MSL) 1 and lead-free (Pb-free) termination. Thermal pad not present; standard reflow profile applies.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar current-sense amplifier applications.

Compared with INA240A1D and MAX40010FAUT+T, the NCP348AEMUTBG uniquely balances ±1% gain accuracy, bidirectional operation, –2 V input capability, and SOT-23-5 footprint-making it optimal for compact, dual-polarity DC/DC current monitoring where moderate accuracy suffices.

Availability

NCP348AEMUTBG is available at Aetrix Electronics and suitable for server VRMs, industrial PLCs, and USB PD fast chargers requiring stable component supply, full traceability, and extended lifecycle support.

Supply support for NCP348AEMUTBG 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 is a global semiconductor leader delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The NCP348AEMUTBG belongs to onsemi's precision analog current-sense amplifier product line, engineered specifically for high-reliability power conversion feedback in space- and power-constrained systems.

FAQ

What is the maximum input common-mode voltage for the NCP348AEMUTBG?

The NCP348AEMUTBG supports an input common-mode voltage range from –2 V to +28 V. This allows direct connection across shunt resistors placed on either high-side or low-side of the power path without external level-shifting components. The –2 V capability enables accurate sensing during reverse current events, such as regenerative braking or USB PD sink-source transitions. This specification is verified across the full operating temperature range.

Does the NCP348AEMUTBG support bidirectional current sensing?

Yes, the NCP348AEMUTBG supports true bidirectional current sensing through its differential input architecture (+IN and –IN pins). When the shunt voltage polarity reverses, the output swings below mid-supply, enabling detection of both sourcing and sinking current directions. This behavior is inherent to the device's internal topology and does not require external configuration or mode selection. The NCP348AEMUTBG maintains ±1% gain accuracy across the full bidirectional range.

What package type is used for the NCP348AEMUTBG?

The NCP348AEMUTBG is housed in a Pb-free, RoHS-compliant 5-pin SOT-23 package (JEDEC MO-178AB). It features gull-wing leads, a body size of 2.9 mm × 1.6 mm, and a nominal height of 1.1 mm. The package is rated MSL 1 and compatible with standard reflow soldering profiles. No thermal pad is included, and no heatsinking is required under typical operating conditions.

Can the NCP348AEMUTBG operate from a 3.3 V supply?

Yes, the NCP348AEMUTBG operates fully specified from a 3.3 V supply, which falls within its 2.7 V to 5.5 V supply voltage range. At 3.3 V, it delivers rail-to-rail output swing (0.1 V to 3.2 V typical), maintains 1 MHz bandwidth, and retains ±1% gain accuracy. Quiescent current remains at 500 µA, making it suitable for mixed-voltage systems where 3.3 V logic rails coexist with higher-power domains.

Is the NCP348AEMUTBG qualified for automotive applications?

The NCP348AEMUTBG is not AEC-Q100 qualified and is intended for industrial and computing applications. While it operates over –40°C to +125°C junction temperature and includes ±30 V fault tolerance on sense pins, it lacks automotive-specific qualification testing (e.g., stress tests, failure analysis reporting, or PPAP documentation). For automotive body control or ADAS systems, designers should select AEC-Q100–qualified alternatives unless full validation is performed per customer-specific requirements.