onsemi NCP717BMX180TCG

Overview

NCP717BMX180TCG from onsemi is a 300 mA, fixed 1.8 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), and 175 mV typical dropout at 300 mA - optimized for battery-powered portable electronics requiring ultra-low power and high noise immunity.

For engineers reviewing the NCP717BMX180TCG datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, thermal behavior, EN-controlled enable/disable sequencing, stability conditions with 1 µF ceramic output capacitor, and design-critical trade-offs between load regulation (±12 mV), PSRR (70 dB @ 1 kHz), and junction temperature derating.

Technical Context

The NCP717BMX180TCG employs a PMOS pass transistor architecture enabling reverse-current blocking and low dropout across its 1.8 V to 5.5 V input range. Its adaptive quiescent current circuitry dynamically reduces ground current under light/no-load conditions while maintaining ±2% output accuracy over −40°C to +125°C.

It integrates thermal shutdown (160°C trip, 20°C hysteresis), current limiting (379 mA typ.), and logic-level enable control (EN threshold: 0.4 V low / 0.9 V high) - but excludes active output discharge (absent in 'B' version per ordering table). Stability is guaranteed with ≥1 µF ceramic C_OUT and ESR < 700 mΩ.

Key Specifications

Pinout & Package

XDFN-4 1.0×1.0 mm package (Case 711AJ) with exposed thermal pad (EPAD) - requires direct solder connection to PCB ground plane for thermal management (R_JA = 250°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6219B182MR-G and RT9013-18GB, the NCP717BMX180TCG delivers superior noise performance (22 µV_RMS vs. ≥35 µV), integrated thermal shutdown, and lower dropout - making it the optimal choice for safety-critical, battery-limited, and RF-sensitive designs where reliability and spectral purity are non-negotiable.

Availability

NCP717BMX180TCG is available at Aetrix Electronics and suitable for smartphone baseband power, wearable sensor hubs, medical pulse oximeters, and Bluetooth LE audio earbuds requiring stable component supply, long-term lifecycle support, and Pb-free compliance.

Supply support for NCP717BMX180TCG 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 intelligent devices.

The NCP717 series is designed for ultra-low-power, noise-sensitive portable applications - delivering high accuracy, low dropout, and minimal quiescent current in miniature XDFN packages for space-constrained battery-operated systems.

FAQ

What is the maximum input voltage rating for the NCP717BMX180TCG?

The NCP717BMX180TCG has an absolute maximum input voltage of 6 V, but its recommended operating input voltage range is 1.8 V to 5.5 V. Exceeding 5.5 V may compromise long-term reliability even if within absolute ratings, and operation below 1.8 V will cause dropout and loss of regulation. The device achieves optimal PSRR and noise performance when VIN is ≥ VOUT + 0.5 V (i.e., ≥2.3 V for NCP717BMX180TCG).

Does the NCP717BMX180TCG include active output discharge?

No, the NCP717BMX180TCG does not include active output discharge. Per the ordering information table, only 'A' (RDIS = 1.2 kΩ) and 'C' (RDIS = 120 Ω) versions feature this function; the 'B' suffix explicitly denotes absence of active discharge. When disabled via EN, the output floats and discharges only through the load or external bleed resistor - critical for systems requiring controlled power-down sequencing.

What output capacitor value and type are required for stability with the NCP717BMX180TCG?

The NCP717BMX180TCG is stable with a minimum 1.0 µF ceramic capacitor (X5R or X7R dielectric) on the output, with ESR < 700 mΩ. Larger values improve load transient response and high-frequency PSRR. Tantalum capacitors are not recommended due to high/temperature-variable ESR. For best results, place the capacitor within 2 mm of the OUT and GND pins using wide, low-inductance traces.

How does the enable pin (EN) behave during power-up and noise events?

The EN pin of the NCP717BMX180TCG features 56 mV hysteresis and internal deglitching to prevent false toggling from noise. It turns on when V_EN rises above 0.9 V and turns off when V_EN falls below 0.4 V. An internal 180 nA pull-down ensures default-off state if left floating. During power-up, the internal soft-start limits inrush current, ensuring monotonic V_OUT ramp without overshoot.

What is the thermal shutdown behavior of the NCP717BMX180TCG?

The NCP717BMX180TCG triggers thermal shutdown at 160°C (typ.) junction temperature and resets at 140°C (typ.), providing 20°C hysteresis. Once tripped, the device disables the pass transistor and stops sourcing current until temperature falls below reset threshold. This protects against catastrophic failure but is not a substitute for proper thermal design - sustained operation above 125°C junction temperature violates recommended reliability limits.