onsemi NCP4641H080T1G

Overview

NCP4641H080T1G from onsemi is a 150 mA CMOS linear voltage regulator with 8.0 V fixed output, 4 V to 36 V input range, ±2% output accuracy, and integrated chip enable (CE) pin for power sequencing. It delivers stable low-noise power in automotive infotainment and industrial control systems where wide VIN tolerance and thermal robustness are required.

For engineers reviewing the NCP4641H080T1G datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at 8 V output (0.20–0.35 V @ 20–150 mA), thermal shutdown at 150°C, quiescent current of 9–20 µA, and SOT-89-5 package compatibility with high-power-density PCB layouts.

Technical Context

The NCP4641H080T1G implements a CMOS-based LDO architecture with internal reference, error amplifier, and pass transistor-enabling ultra-low quiescent current and high PSRR (≥27 dB at 1 kHz). Its CE pin operates with TTL-compatible thresholds (V_CEH = 1.5 V, V_CEL = 0.3 V), enabling precise system-level power gating.

Protection circuitry includes peak current limiting (50 mA short-circuit limit), thermal shutdown with hysteresis (150°C trip / 125°C release), and robust ESD immunity (2 kV HBM). The device maintains regulation across −40°C to +105°C ambient, with output voltage drift ≤±100 ppm/°C.

Key Specifications

Pinout & Package

SOT-89-5 package (Case 528AB) with exposed thermal pad; 4.4–4.6 mm × 2.4–2.6 mm footprint and 1.4–1.6 mm height. Optimized for surface-mount thermal conduction via Pin 2 (GND) and Pin 4 (GND) soldered to large copper pour.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV73380PDBVR and MCP1703T-8002E/MB, the NCP4641H080T1G uniquely supports 36 V input and automotive temperature range while delivering 150 mA at ultra-low IQ - making it the sole option for ruggedized 8 V regulation in industrial and vehicle environments.

Availability

NCP4641H080T1G is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLC I/O modules, and smart home gateways requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned reliability.

Supply support for NCP4641H080T1G 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 manufacturer specializing in energy-efficient power management, analog, and sensor solutions for automotive, industrial, and cloud infrastructure markets.

The NCP4641 series belongs to onsemi's high-voltage LDO portfolio, designed specifically for demanding applications requiring wide input range, low IQ, and robust protection in harsh electrical environments.

FAQ

What is the maximum input voltage rating for the NCP4641H080T1G?

The NCP4641H080T1G has an absolute maximum input voltage rating of 50 V, with a peak input voltage limit of 60 V for durations up to 200 ms. Its recommended operating input range is 4 V to 36 V, making it suitable for direct connection to automotive batteries and industrial 24 V power rails. Exceeding 50 V may cause permanent damage.

Does the NCP4641H080T1G require an output capacitor to operate stably?

The NCP4641H080T1G is internally compensated and can operate stably without an output capacitor. However, adding a 100 nF to 10 µF ceramic capacitor close to the VOUT pin improves transient response, reduces output noise, and increases phase margin under dynamic load conditions. For optimal performance in noise-sensitive applications, a 1 µF X7R capacitor is recommended.

What is the dropout voltage of the NCP4641H080T1G at full load?

At 150 mA output current and 25°C junction temperature, the NCP4641H080T1G exhibits a dropout voltage of 0.35 V maximum. This means the device maintains regulation as long as input voltage remains ≥8.35 V. Dropout decreases to 0.20 V at 20 mA, enabling efficient operation across light-to-moderate loads in battery-powered systems.

How does the CE pin function on the NCP4641H080T1G?

The CE (chip enable) pin on the NCP4641H080T1G is active-high with TTL-compatible thresholds: V_CEH = 1.5 V minimum for turn-on and V_CEL = 0.3 V maximum for turn-off. When CE is high, the regulator delivers 8.0 V; when CE is low or grounded, output is disabled and quiescent current drops to ≤1 µA. Floating CE must be avoided to prevent unstable output behavior.

Is the NCP4641H080T1G qualified for automotive applications?

The NCP4641H080T1G is not explicitly AEC-Q100 qualified per its datasheet, but it meets key automotive requirements including operation from −40°C to +105°C junction temperature, 2 kV HBM ESD rating, and robust protection features (thermal shutdown, current limiting). It is widely used in automotive infotainment and body electronics where full qualification is not mandated, though design validation per vehicle-specific stress tests is recommended.