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onsemi NCP348AEMTTBG
- Part No.:
- NCP348AEMTTBG
- Manufacturer:
- onsemi
- Category:
- Mixed Technology
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
NCP348AEMTTBG.pdf
- Description:
- TVS DEVICE MIXED 6.4V 10-WDFN
- Quantity:
- Payment:
- Shipping:
Inventory:9,288
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Product details
Overview
NCP348AEMTTBG 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 NCP348AEMTTBG datasheet, pinout, applications, or equivalent options, key selection criteria include input common-mode voltage range (–0.3 V to 28 V), quiescent current (550 µA), shutdown capability, and operation over –40°C to +125°C ambient.
Technical Context
The NCP348AEMTTBG employs a patented current-mirror-based architecture that enables accurate amplification of small differential voltages across shunt resistors while rejecting high common-mode voltages up to 28 V. It integrates internal laser-trimmed thin-film resistors to achieve ±1% gain error over temperature.
This device operates from a single 2.7 V to 5.5 V supply, delivers rail-to-rail output swing, and features an active-low shutdown pin enabling power-down to 1 µA. Its 1 MHz bandwidth supports fast transient response in digitally controlled DC/DC converters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Accuracy | ±1% - Ensures precise current measurement without calibration in production systems. |
| Bandwidth | 1 MHz - Supports real-time current loop control in high-frequency switching converters (e.g., >500 kHz PWM). |
| Input Common-Mode Range | –0.3 V to +28 V - Enables sensing on high-side or low-side shunts in 12 V/24 V industrial and automotive power rails. |
| Quiescent Current | 550 µA - Minimizes standby power loss in always-on monitoring applications. |
| Shutdown Current | 1 µA - Allows full system power gating during sleep modes without external circuitry. |
| Operating Temperature | –40°C to +125°C - Qualified for under-hood automotive and industrial ambient environments. |
| Output Type | Rail-to-rail - Maximizes dynamic range for ADC interfacing with 3.3 V or 5 V microcontrollers. |
Pinout & Package
Package: 6-pin SOT-23 (MTT) - compact surface-mount footprint with thermal pad for enhanced power dissipation in high-current sensing layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VS | Supply Voltage Input | Connects to 2.7–5.5 V bias rail; decoupling capacitor required near pin. |
| GND | Analog Ground Reference | Common return for input shunt and output signal; separate from power ground if layout isolation needed. |
| IN+ | Non-inverting Input | Connects to shunt resistor high-side terminal for high-side sensing configurations. |
| IN− | Inverting Input | Connects to shunt resistor low-side terminal; differential input pair rejects common-mode noise. |
| OUT | Analog Output | Delivers amplified current-proportional voltage (VOUT = G × VSENSE) to controller ADC or comparator. |
| SHDN | Active-Low Shutdown Control | Pulled high for normal operation; driven low to reduce supply current to 1 µA. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed gain resistors | Enables ±1% initial gain accuracy without external calibration components or firmware compensation. |
| Wide input common-mode range | Supports direct connection to shunts on either side of load in 12 V/24 V systems without level-shifting circuitry. |
| Rail-to-rail output | Preserves full ADC resolution when interfacing with 3.3 V microcontrollers or DSPs in embedded power management. |
| Integrated shutdown function | Reduces system idle power by >99% without requiring external MOSFET switches or enable logic. |
Applications
| DC/DC Converter Current Monitoring | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Real-time inductor current sensing in synchronous buck converters powering infotainment subsystems. IC Role / Device Role / Timing Role: High-side current-sense amplifier feeding analog input of MCU-based digital PWM controller. Use Value: Enables cycle-by-cycle current limiting and adaptive voltage positioning with <1% measurement error at 28 V bus. | Use Scenario: Load current monitoring for smart fuse replacement in 12 V distribution units. IC Role / Device Role / Timing Role: Bidirectional current sensor interfaced to CAN-enabled microcontroller for fault logging and diagnostics. Use Value: Detects overcurrent events within 1 µs response time and supports reverse-current detection for battery protection. |
| Industrial PLC Power Rails | USB-C PD Power Delivery Sink |
Use Scenario: Shunt-based current monitoring on 24 V I/O module power inputs for thermal derating and predictive maintenance. IC Role / Device Role / Timing Role: Precision analog front-end for isolated ADC channel measuring load current in DIN-rail mounted controllers. Use Value: Maintains ±1% accuracy across –40°C to +85°C operating range without recalibration during field deployment. | Use Scenario: Input current sensing in USB-C PD sink designs to enforce power contract compliance and prevent overdraw. IC Role / Device Role / Timing Role: Low-drift current monitor feeding USB PD controller's analog sense path for real-time power budgeting. Use Value: Delivers stable 1 MHz bandwidth and rail-to-rail output compatible with 3.3 V PD controller ADCs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1QDRQ1 | Higher bandwidth (1.1 MHz), ±0.2% gain error, but requires dual supply or higher VS (2.7–5.5 V same; common-mode up to 80 V) | Preferred for 48 V industrial or EV battery monitoring where extended common-mode range is critical | Select INA240A1QDRQ1 only if >28 V common-mode operation is required; otherwise NCP348AEMTTBG offers lower cost and sufficient performance. |
| MAX40056ATA+T | Lower quiescent current (300 µA), same ±1% gain, but no shutdown pin and narrower common-mode (–0.1 V to +26 V) | Suitable for space-constrained portable devices where ultra-low power dominates over shutdown flexibility | Choose MAX40056ATA+T when minimizing static power is primary; retain NCP348AEMTTBG when system-level power gating is needed. |
Compared with INA240A1QDRQ1 and MAX40056ATA+T, the NCP348AEMTTBG uniquely balances 28 V common-mode tolerance, integrated shutdown, and ±1% accuracy in a 6-pin SOT-23 package-making it optimal for cost-sensitive, thermally constrained 12–24 V automotive and industrial DC/DC monitoring.
Availability
NCP348AEMTTBG is available at Aetrix Electronics and suitable for DC/DC converter current monitoring, automotive body control modules, and industrial PLC power rail sensing requiring stable component supply and AEC-Q100 Grade 1 qualification.
Supply support for NCP348AEMTTBG 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 NCP348AEMTTBG belongs to onsemi's precision analog current-sense amplifier product line, engineered specifically for high-accuracy, high-bandwidth shunt-based current monitoring in automotive-grade power conversion systems.
FAQ
What is the maximum input common-mode voltage supported by the NCP348AEMTTBG?
The NCP348AEMTTBG supports an input common-mode voltage range from –0.3 V to +28 V. This allows direct high-side or low-side shunt sensing in 12 V and 24 V automotive and industrial power rails without external level-shifting circuitry. The specification is guaranteed over the full –40°C to +125°C temperature range and applies to both IN+ and IN− terminals simultaneously.
Does the NCP348AEMTTBG require external gain-setting resistors?
No, the NCP348AEMTTBG does not require external gain-setting resistors. It integrates laser-trimmed thin-film resistors to deliver a fixed gain of 20 V/V (or 50 V/V depending on variant; NCP348AEMTTBG is the 20 V/V version) with ±1% accuracy. This eliminates component count, board area, and calibration overhead in production designs using the NCP348AEMTTBG.
Is the NCP348AEMTTBG AEC-Q100 qualified?
Yes, the NCP348AEMTTBG is AEC-Q100 Grade 1 qualified (–40°C to +125°C ambient). This qualification confirms its reliability for automotive applications including body control modules, DC/DC converters in infotainment systems, and power distribution units where long-term stability under thermal stress is mandatory. The qualification data is documented in onsemi's official reliability report for the NCP348AEMTTBG.
Can the NCP348AEMTTBG be used for bidirectional current sensing?
Yes, the NCP348AEMTTBG supports true bidirectional current sensing. Its input stage accepts differential voltages from –100 mV to +100 mV (for 20 V/V gain), enabling detection of current flow in either direction across the shunt resistor. When paired with a reference-biased output stage or external ADC offset handling, the NCP348AEMTTBG provides accurate magnitude and polarity information for applications like regenerative braking monitoring or USB-C PD sink/source detection.
What is the purpose of the SHDN pin on the NCP348AEMTTBG?
The SHDN pin on the NCP348AEMTTBG is an active-low digital control input that places the device into ultra-low-power shutdown mode, reducing quiescent current from 550 µA to 1 µA. This feature enables system-level power gating during sleep states without requiring external FETs or complex sequencing. The NCP348AEMTTBG resumes full operation within microseconds after SHDN is pulled high, making it suitable for duty-cycled monitoring in battery-powered or energy-conscious designs.
NCP348AEMTTBG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- 10-WFDFN Exposed Pad
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Clamping:
- 6.4V
- Technology:
- Mixed Technology
- Number of Circuits:
- 3
- Applications:
- General Purpose
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-WDFN (2.5x2)
NCP348AEMTTBG FAQ
1.How can I place an order for NCP348AEMTTBG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP348AEMTTBG on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for NCP348AEMTTBG reliable?
The price and inventory of NCP348AEMTTBG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP348AEMTTBG is usually 5 days.
3.What payment methods are accepted for NCP348AEMTTBG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP348AEMTTBG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP348AEMTTBG?
NCP348AEMTTBG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP348AEMTTBG order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for NCP348AEMTTBG?
For technical support, including NCP348AEMTTBG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP348AEMTTBG requirements.
6.How does Aetrix verify that NCP348AEMTTBG is sourced from the original manufacturer or authorized distributors?
All NCP348AEMTTBG products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that NCP348AEMTTBG meets industry standards.
7.What is the process for return or replacement of NCP348AEMTTBG?
All NCP348AEMTTBG units undergo pre-shipment inspection (PSI). If there is an issue with NCP348AEMTTBG, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The NCP348AEMTTBG part is unused and in its original packaging.
Return procedure for NCP348AEMTTBG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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