onsemi NCV8177BMX250TCG

Overview

NCV8177BMX250TCG from onsemi is a 2.5 V, 500 mA CMOS low-dropout (LDO) linear voltage regulator with enable input and no output discharge function. It operates from 1.6 V to 5.5 V input, delivers ±0.8% output accuracy at −40°C to +125°C, and features 200 mV typical dropout at 500 mA (V_OUT = 1.8 V). Designed for automotive infotainment RF blocks and power-sensitive sensors, it supports stable regulation with only 1 µF ceramic output capacitance.

For engineers reviewing the NCV8177BMX250TCG datasheet, pinout, applications, or equivalent options, key selection criteria include its AEC-Q100 qualification, 60 µA quiescent current, thermal shutdown at 175°C, PSRR of 75 dB at 1 kHz, and compatibility with space-constrained XDFN4 1.0 mm × 1.0 mm packaging.

Technical Context

The NCV8177BMX250TCG implements a PMOS pass transistor architecture enabling ultra-low dropout and reverse-current protection via inherent body diode management. Its adaptive ground current design maintains 60 µA typical quiescent current across load conditions, while internal soft-start and precision reference ensure monotonic startup without output overshoot.

It integrates over-current protection with 750 mA typical current limit and thermal shutdown with 20°C hysteresis. The EN pin (active-high, 1.0 V threshold) controls regulation and disables the output without discharge-distinguishing it from the NCV8177A variant-and draws only 0.15 µA at 5.5 V.

Key Specifications

Pinout & Package

XDFN4 package (Case 711AJ), 1.0 mm × 1.0 mm × 0.4 mm, with exposed thermal pad connected to GND. Pin 1 = OUT, Pin 2 = GND, Pin 3 = EN, Pin 4 = IN.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NCV8177AMX250TCG, the NCV8177BMX250TCG eliminates output discharge-reducing risk of unintended current paths-while matching all electrical specs except discharge behavior. Versus TLV73325PDBVR, it adds AEC-Q100 qualification, 500 mA capability, and extended temperature support critical for automotive deployment.

Availability

NCV8177BMX250TCG is available at Aetrix Electronics and suitable for automotive camera modules, infotainment RF power rails, and instrument cluster displays requiring stable component supply, AEC-Q100 compliance, and compact XDFN4 packaging.

Supply support for NCV8177BMX250TCG 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 for automotive, industrial, cloud, and IoT applications.

The NCV8177BMX250TCG belongs to onsemi's automotive-grade LDO family, engineered specifically for noise-sensitive RF and imaging subsystems in vehicles-emphasizing low dropout, high PSRR, and AEC-Q100 reliability.

FAQ

What is the output voltage tolerance of the NCV8177BMX250TCG over temperature?

The NCV8177BMX250TCG maintains ±0.8% output voltage accuracy across the full operating junction temperature range of −40°C to +125°C. This specification is guaranteed per the Electrical Characteristics table in the datasheet and applies to the fixed 2.50 V output version. At room temperature (25°C), the tolerance tightens to ±0.8% (same value), ensuring consistent performance for precision analog circuits without recalibration.

Does the NCV8177BMX250TCG include output discharge functionality?

No, the NCV8177BMX250TCG does not include output discharge functionality. The "B" suffix explicitly denotes the version without discharge-unlike the "A" variant (e.g., NCV8177AMX250TCG), which integrates a 60 Ω typical discharge path. When EN is pulled low, the NCV8177BMX250TCG disables regulation and leaves the OUT pin in high-impedance state, preserving external capacitor charge.

What is the minimum input voltage required for the NCV8177BMX250TCG to regulate at 2.5 V output?

The NCV8177BMX250TCG requires a minimum input voltage of 2.69 V to maintain regulation at 2.50 V output under full 500 mA load. This is derived from the maximum dropout voltage of 190 mV (typical) at 3.0 V ≤ V_OUT < 3.6 V, as specified in the Electrical Characteristics table. At lighter loads, regulation is possible down to 1.6 V input, but full-load operation mandates VIN ≥ V_OUT + V_DO.

Which package type is used by the NCV8177BMX250TCG?

The NCV8177BMX250TCG uses the XDFN4 package (Case 711AJ): 1.0 mm × 1.0 mm × 0.4 mm with an exposed thermal pad. This ultra-compact leadless package supports high-density automotive PCB layouts and provides a thermal resistance (R_JA) of 223°C/W on standard JEDEC test board conditions.

Is the NCV8177BMX250TCG qualified for automotive applications?

Yes, the NCV8177BMX250TCG is AEC-Q100 qualified (Grade 1: −40°C to +125°C ambient) and PPAP capable. It meets automotive reliability standards including stress testing for temperature cycling, humidity, and mechanical shock-making it suitable for use in engine compartments, infotainment systems, and ADAS sensors where long-term stability under harsh conditions is mandatory.