onsemi NCV8189CMTW280TAG

Overview

NCV8189CMTW280TAG from onsemi is a 0.5 A automotive-grade LDO regulator with fixed 2.80 V output, ±0.7% initial accuracy at 25°C, 65 mV typical dropout at 0.5 A, and integrated Power Good open-collector output. It operates from 1.6 V to 5.5 V input, delivers low noise (10 µV_RMS), high PSRR (85 dB @ 1 kHz), and supports controlled 5 mV/s output slew rate for in-vehicle power sequencing.

For engineers reviewing the NCV8189CMTW280TAG datasheet, pinout, applications, or equivalent options, this page provides verified technical context, package mapping to WDFNW6 2 mm × 2 mm, validated pin functions, real-world automotive use cases, and two confirmed alternative parts with documented functional and application differences.

Technical Context

The NCV8189CMTW280TAG implements a PMOS pass transistor architecture enabling ultra-low dropout and stable operation with 4.7 µF ceramic capacitors on both input and output. Its internal reference is trimmed to ±0.7% at 25°C and maintains ±1% accuracy across −40°C to +125°C and full 0.1–500 mA load range.

Power Good logic monitors regulated output voltage with 95% rising and 90% falling thresholds, includes 9 µs blanking on falling edge and 18 µs on rising edge, and remains functional even when EN is low. The device integrates active output discharge (250 Ω typical) and thermal shutdown (165°C) with 15°C hysteresis.

Key Specifications

Pinout & Package

NCV8189CMTW280TAG is packaged in WDFNW6 2 mm × 2 mm × 0.75 mm, case 511DW, with wettable flanks and exposed thermal pad. The 6-pin layout supports compact automotive PCB layouts and efficient heat dissipation via bottom-side thermal pad soldered to ground plane (R_θJB = 6.6 °C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with NCV8189CMTW280TAG, the 3.30 V variant offers identical functionality at a different output voltage, while TLE4275G provides basic regulation without sequencing features-making it suitable only for simpler, non-PG-dependent automotive loads.

Availability

NCV8189CMTW280TAG is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and telematics control units requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.

Supply support for NCV8189CMTW280TAG 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 focused on energy-efficient electronics, with leadership in automotive, industrial, and cloud power solutions.

The NCV8189 series is part of onsemi's automotive power management portfolio, designed specifically for RF-sensitive and safety-critical vehicle subsystems requiring ultra-low noise, high PSRR, and robust AEC-Q100 qualification.

FAQ

What is the output voltage tolerance of NCV8189CMTW280TAG over temperature and load?

The NCV8189CMTW280TAG maintains ±1% output voltage accuracy across −40°C to +125°C junction temperature and 0.1 mA to 500 mA load current. At 25°C, initial accuracy is tighter at ±0.7%. This specification is guaranteed per onsemi's Electrical Characteristics table and applies directly to the NCV8189CMTW280TAG fixed 2.80 V variant.

Does NCV8189CMTW280TAG require an external feedback resistor network?

No, NCV8189CMTW280TAG is a fixed-output version and uses the SNS pin internally connected to OUT; no external resistors are needed. The FB pin is not present in this variant. External resistor dividers are only applicable to the ADJ version (e.g., NCV8189CMTWADJTAG), not the NCV8189CMTW280TAG.

What is the purpose of the Power Good (PG) pin on NCV8189CMTW280TAG?

The PG pin on NCV8189CMTW280TAG is an open-collector output that signals when the 2.80 V output has reached 95% of nominal (rising) or fallen below 90% (falling), with built-in 9 µs/18 µs blanking to reject transients. It remains functional even when EN is low, enabling reliable power sequencing in automotive MCUs-critical for safe boot and shutdown of the NCV8189CMTW280TAG-powered subsystem.

Can NCV8189CMTW280TAG operate with input voltage below 2.80 V?

Yes, NCV8189CMTW280TAG operates from 1.6 V to 5.5 V input. With a typical dropout of 69 mV at 500 mA, it regulates 2.80 V output down to VIN ≈ 2.869 V. Below that, output drops linearly. Its wide 1.6 V minimum input enables use with partially discharged batteries or post-buck converter rails-key for cold-crank resilience in automotive applications using the NCV8189CMTW280TAG.

Is NCV8189CMTW280TAG compatible with standard 2 mm × 2 mm WDFNW6 footprints?

Yes, NCV8189CMTW280TAG uses the WDFNW6 2 mm × 2 mm × 0.75 mm package (case 511DW) with 0.65 mm pitch and wettable flanks. Its mechanical drawing matches JEDEC-standard footprint dimensions, including pad layout, exposed thermal pad size (1.55 mm × 1.55 mm), and pin 1 marking location-ensuring drop-in compatibility with existing WDFNW6-2x2 designs for the NCV8189CMTW280TAG.