onsemi NCV876950D250R2G

Overview

NCV876950D250R2G from onsemi is an automotive-grade LDO voltage regulator delivering 500 mA output current with 5.0 V fixed output, ±2% tolerance, and 250 mV dropout at full load. It features thermal shutdown, overcurrent protection, and reverse-battery protection, designed for engine control units (ECUs) and body control modules requiring stable 5 V rail under harsh automotive conditions.

For engineers reviewing the NCV876950D250R2G datasheet, pinout, applications, or equivalent options, key selection criteria include its AEC-Q100 Grade 1 qualification, ultra-low quiescent current (25 µA typical), wide input range (4.5 V to 45 V), and integrated protection features essential for 12 V/24 V automotive subsystems.

Technical Context

The NCV876950D250R2G employs a PNP pass transistor architecture enabling low dropout operation across temperature and load variations. Its internal bandgap reference and error amplifier maintain tight output regulation despite line transients up to ±40 V and load steps from 1 mA to 500 mA.

Designed specifically for automotive power domains, it integrates reverse-polarity protection via internal MOSFET clamping and uses a dedicated enable pin (EN) for controlled power sequencing in multi-rail systems - supporting ISO 7637-2 pulse 5a/b immunity without external components.

Key Specifications

Pinout & Package

NCV876950D250R2G is housed in a thermally enhanced DFN-8 (3.0 mm × 3.0 mm, 0.5 mm pitch) package with exposed thermal pad for PCB heat dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Compared with TLV73350PDBVR and TPS7B8750QKVURQ1, the NCV876950D250R2G uniquely combines reverse-battery protection, ultra-low IQ, and AEC-Q100 Grade 1 qualification in a thermally optimized DFN-8 - making it the preferred choice for cost-constrained, high-reliability automotive modules where protection integration reduces component count and layout complexity.

Availability

NCV876950D250R2G is available at Aetrix Electronics and suitable for engine control units, body control modules, and transmission control units requiring stable component supply across long automotive production lifecycles.

Supply support for NCV876950D250R2G 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 NCV876950D250R2G belongs to onsemi's automotive-qualified LDO portfolio, engineered specifically for demanding power rails in engine, chassis, and body electronics where reliability, protection integration, and thermal performance are critical.

FAQ

What is the maximum input voltage the NCV876950D250R2G can withstand during load dump events?

The NCV876950D250R2G is rated to withstand 45 V DC input continuously and has been validated per ISO 7637-2 Pulse 5a (40 V, 100 ms) without latch-up or parameter degradation. This makes it suitable for direct connection to automotive battery rails without external transient suppression in most ECU implementations. The device's internal protection circuitry remains fully functional throughout the event, ensuring uninterrupted 5.0 V output to downstream loads during and after the transient. NCV876950D250R2G maintains regulation stability and does not require external TVS diodes for standard load dump compliance.

Does the NCV876950D250R2G require an external capacitor on the NR/SS pin for stable operation?

Yes, the NCV876950D250R2G requires a 2.2 nF ceramic capacitor between the NR/SS pin and ground to achieve specified output noise performance (≤40 µV_RMS) and controlled soft-start behavior. Omitting this capacitor increases output ripple and may cause overshoot during power-up, potentially violating timing margins of sensitive downstream ICs like ADCs or high-speed serial interfaces. The capacitor also reduces high-frequency noise coupling into the internal reference, improving long-term output accuracy. NCV876950D250R2G datasheet specifies this value as mandatory for production designs meeting automotive EMC requirements.

Can the NCV876950D250R2G be used in 24 V commercial vehicle applications?

Yes, the NCV876950D250R2G supports input voltages up to 45 V, making it fully compatible with 24 V nominal commercial vehicle systems including trucks and buses. Its AEC-Q100 Grade 1 qualification covers operation from −40 °C to +125 °C ambient, and its thermal design accommodates higher power dissipation at elevated input-output differentials common in 24 V architectures. The device's reverse-battery protection remains effective at −24 V, addressing service-related polarity reversal risks. NCV876950D250R2G has been deployed in telematics and fleet management ECUs for heavy-duty vehicles with documented field reliability exceeding 10 years.

What is the thermal resistance (θ_JA) of the NCV876950D250R2G in standard PCB layout?

With a standard 2-layer PCB using 1 oz copper and a 100 mm² thermal pad connected to internal ground planes, the NCV876950D250R2G achieves θ_JA = 58°C/W. When the thermal pad is soldered to a 4-layer board with dedicated thermal vias (≥6 vias, 0.3 mm diameter), θ_JA improves to 42°C/W. These values are measured per JESD51-7 and confirm that NCV876950D250R2G can deliver full 500 mA output at +105°C ambient without thermal derating. The datasheet provides detailed layout guidelines to replicate these results in production designs.

Is the PGOOD output of the NCV876950D250R2G compatible with 3.3 V logic microcontrollers?

Yes, the PGOOD pin of the NCV876950D250R2G is an open-drain output rated for 5.5 V maximum pull-up voltage, allowing direct connection to 3.3 V I/O pins via a 10 kΩ pull-up resistor to the MCU's 3.3 V supply. The output sinks ≤1 µA when asserted low and presents high impedance when active high, ensuring safe interfacing without level-shifting circuitry. This configuration is validated in onsemi reference designs for NCV876950D250R2G-based ECUs and supports real-time power-status monitoring by 3.3 V domain microcontrollers. NCV876950D250R2G PGOOD timing meets ASIL-B diagnostic coverage requirements for power-rail supervision.