onsemi NCP717BMX185TCG

Overview

NCP717BMX185TCG from onsemi is a 300 mA, fixed 1.85 V output low-dropout (LDO) regulator in XDFN-4 1.0×1.0 mm package, featuring 25 µA typical quiescent current, 22 µV_RMS output noise (100 Hz–100 kHz), 175 mV typical dropout at 300 mA, ±2% output accuracy over load/line/temperature, and 70 dB PSRR at 1 kHz - optimized for noise-sensitive, space-constrained portable electronics.

For engineers reviewing the NCP717BMX185TCG datasheet, pinout, applications, or equivalent options, key selection criteria include ultra-low IQ for battery longevity, ceramic-capacitor stability with only 1 µF C_OUT, EN-controlled shutdown with <1 µA disable current, thermal/current protection, and absence of active output discharge (distinguishing it from A/C variants).

Technical Context

The NCP717BMX185TCG employs a PMOS pass transistor architecture enabling low dropout and inherent reverse-current blocking. Its adaptive ground current circuitry dynamically reduces IQ to 25 µA at no-load while maintaining regulation, and its bandgap reference + error amplifier delivers ±2% output accuracy across −40°C to +125°C junction temperature.

Unlike A- and C-suffix variants, the B-suffix NCP717BMX185TCG omits active output discharge functionality - confirmed by datasheet footnote and ordering table - making it suitable where controlled discharge is unnecessary and lowest possible shutdown current (<1 µA) is prioritized.

Key Specifications

Pinout & Package

XDFN-4 1.0×1.0 mm, 0.65 mm pitch, exposed pad (EPAD) thermally connected to GND - enables compact layout and efficient heat dissipation in ultra-thin portable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700T-1802E/TT and TLC7603QDCKR, the NCP717BMX185TCG uniquely balances 300 mA capability, 25 µA IQ, EN control, thermal/current protection, and XDFN-4 footprint - making it optimal for compact, battery-critical consumer and industrial portable designs where all four features are required simultaneously.

Availability

NCP717BMX185TCG is available at Aetrix Electronics and suitable for wearable health sensors, Bluetooth LE audio modules, and industrial IoT edge nodes requiring stable component supply with guaranteed long-term availability.

Supply support for NCP717BMX185TCG 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The NCP717 series is designed for ultra-low-power, noise-sensitive portable electronics - emphasizing quiescent current optimization, small-footprint packaging, and robust protection for battery-constrained systems.

FAQ

What is the output voltage tolerance of the NCP717BMX185TCG over temperature and load?

The NCP717BMX185TCG maintains ±2% output voltage accuracy across −40°C to +125°C junction temperature, 0–300 mA load, and input voltage range (1.8 V to 5.5 V). This is verified per datasheet Electrical Characteristics Table, ensuring reliable operation without external trimming in production systems.

Does the NCP717BMX185TCG include active output discharge?

No. The 'B' suffix in NCP717BMX185TCG explicitly denotes absence of active output discharge - confirmed in the Ordering Information table and Applications Information section. Only A- and C-suffix variants provide this feature; the B version offers lower shutdown current (<1 µA) instead.

What minimum output capacitance is required for stability with the NCP717BMX185TCG?

The NCP717BMX185TCG is stable with a minimum 1.0 µF ceramic capacitor (X5R/X7R) on the output, as stated in the Applications Information section. The datasheet confirms stability down to 100 nF, but 1.0 µF is the recommended minimum for full transient and PSRR performance across temperature.

How does the enable pin (EN) function on the NCP717BMX185TCG?

The EN pin on the NCP717BMX185TCG provides logic-level ON/OFF control: voltage >0.9 V enables regulation; <0.4 V disables output with <1 µA shutdown current. Internal 180 nA pull-down ensures default-off state if left floating, and 56 mV hysteresis prevents noise-induced toggling.

What protection features are integrated into the NCP717BMX185TCG?

The NCP717BMX185TCG integrates thermal shutdown (160°C trip, 140°C reset), output current limiting (379 mA typ.), short-circuit protection (390 mA typ.), and reverse-current blocking via its PMOS pass transistor - all detailed in the Applications Information section and Absolute Maximum Ratings table.