onsemi NCP717AMX285TCG

Overview

NCP717AMX285TCG from onsemi is a 300 mA, fixed 2.85 V low-dropout (LDO) regulator with ultra-low quiescent current (25 µA typ.), 22 µV_RMS output noise (100 Hz–100 kHz), and 175 mV typical dropout at 300 mA. It features active output discharge (1.2 kΩ), thermal shutdown, current limiting, and stable operation with only 1 µF ceramic output capacitance - optimized for battery-powered portable electronics requiring high PSRR (70 dB @ 1 kHz) and ±2% output accuracy over load/line/temperature.

For engineers reviewing the NCP717AMX285TCG datasheet, pinout, applications, or equivalent options, this device is selected for space-constrained, noise-sensitive power rails in GPS modules, Bluetooth/WLAN subsystems, and portable medical sensors where dynamic IQ adjustment and fast transient response are critical.

Technical Context

The NCP717AMX285TCG employs a PMOS pass transistor architecture enabling reverse-current blocking and low dropout across its 1.8 V–5.5 V input range. Its adaptive ground current circuitry dynamically reduces IQ to 25 µA at no-load while maintaining regulation, and integrates an internal soft-start to prevent output overshoot during enable.

It includes a dedicated EN pin with 0.9 V turn-on / 0.4 V turn-off thresholds, built-in 56 mV hysteresis, and an active discharge path (1.2 kΩ) that pulls VOUT to GND when disabled - a feature confirmed exclusive to "A" and "C" suffix variants per datasheet Section "PIN FUNCTION DESCRIPTION" and "APPLICATIONS INFORMATION".

Key Specifications

Pinout & Package

XDFN4 1.0 mm × 1.0 mm, 0.65 mm pitch, exposed pad (EPAD) package - enables ultra-compact layouts (< 1 mm² footprint) with low thermal resistance (θ_JA = 250°C/W) when soldered to GND plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700-2802E/TO and TPL7407LDR, the NCP717AMX285TCG delivers superior noise performance (22 vs. ≥30 µV_RMS), guaranteed active discharge for reliable sequencing, and identical 25 µA IQ - making it the preferred choice for RF, medical, and multi-rail portable designs where output control and spectral purity are non-negotiable.

Availability

NCP717AMX285TCG is available at Aetrix Electronics and suitable for GPS receivers, Bluetooth LE sensor nodes, portable ECG monitors, and WLAN/BT combo modules requiring stable component supply with guaranteed long-term manufacturability.

Supply support for NCP717AMX285TCG 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 innovation for automotive, industrial, cloud, and IoT applications.

The NCP717 series is designed specifically for ultra-low-power, noise-critical portable electronics - emphasizing adaptive IQ, small-footprint packaging, and integrated protection for battery-operated devices.

FAQ

What is the output voltage tolerance of the NCP717AMX285TCG over temperature and load?

The NCP717AMX285TCG maintains ±2% output voltage accuracy across −40°C to +125°C junction temperature, 0–300 mA load, and input voltage range (2.3 V to 5.5 V). This is verified in the Electrical Characteristics table under "Output Voltage Accuracy" with test conditions explicitly covering full operational ranges - ensuring consistent 2.85 V regulation in portable medical and GPS applications.

Does the NCP717AMX285TCG include active output discharge, and how does it function?

Yes, the NCP717AMX285TCG includes active output discharge via a 1.2 kΩ internal resistor between OUT and GND, activated only when EN < 0.4 V. This feature is confirmed in the datasheet's "PIN FUNCTION DESCRIPTION", "APPLICATIONS INFORMATION", and ordering table (A-suffix denotes "With active output discharge function"). It ensures rapid, controlled discharge of output capacitance during shutdown - critical for multi-rail sequencing in portable systems.

What is the minimum output capacitance required for stability with the NCP717AMX285TCG?

The NCP717AMX285TCG is stable with a minimum 1.0 µF ceramic (X5R/X7R) output capacitor, as stated in the Features list and Applications Information section. The datasheet confirms stability down to 100 nF with safety margin, but 1.0 µF is the recommended minimum for guaranteed performance across temperature and process variation - enabling compact, low-BOM-count designs.

How does the quiescent current of the NCP717AMX285TCG behave under varying input voltage and load?

The NCP717AMX285TCG features dynamic quiescent current adjustment: IQ remains at 25 µA typical at no-load across 1.8–5.5 V input, rising to 105 µA at 2 mA load and 250 µA at 300 mA load (per Electrical Characteristics table). This behavior is validated in Figures 5–10 (Quiescent Current vs. Temperature/Input Voltage), confirming ultra-low standby power without sacrificing full-load capability.

What protection features are integrated into the NCP717AMX285TCG?

The NCP717AMX285TCG integrates thermal shutdown (160°C trip, 140°C hysteresis), output current limiting (379 mA typ. at 100 mV dropout), short-circuit protection (390 mA typ. at VOUT = 0 V), and reverse-current blocking via its PMOS pass element. All protections are detailed in the Features list, Absolute Maximum Ratings, and Applications Information - ensuring robust operation in unattended portable deployments.