onsemi NCP140AMXC300TCG

Overview

NCP140AMXC300TCG from onsemi is a 150 mA, capacitor-free, low-noise LDO voltage regulator with fixed 3.0 V output, ±1% accuracy at 25°C, 125 mV dropout at 150 mA (for 3.3 V variant; 3.0 V dropout is 115 mV per design correlation), and 45 µA typical quiescent current - optimized for battery-powered portable electronics requiring minimal footprint and ultra-low standby power.

For engineers reviewing the NCP140AMXC300TCG datasheet, pinout, applications, or equivalent options, key selection criteria include capacitor-free stability, active output discharge capability (A-series), XDFN4 0.8 mm × 0.8 mm package constraints, thermal shutdown behavior at 160°C, and PSRR of 55 dB at 1 kHz under 10 mA load.

Technical Context

The NCP140AMXC300TCG employs a PMOS pass transistor architecture enabling true capacitor-free operation across input voltages from 1.6 V to 5.5 V, with internal bandgap reference and soft-start circuitry ensuring monotonic turn-on without output overshoot. Its enable logic drives EN high (>0.9 V) for regulation and low (<0.4 V) for shutdown with 0.1 µA standby current.

Thermal protection includes 160°C junction shutdown with 20°C hysteresis, while output current limiting is set at 230 mA (typ.) and short-circuit current at 250 mA (typ.), both functional across −40°C to +85°C. The A-suffix denotes integrated active discharge via 100 Ω pull-down when disabled.

Key Specifications

Pinout & Package

XDFN4 package (Case 711BF), 0.8 mm × 0.8 mm × 0.4 mm, with exposed thermal pad requiring direct connection to PCB ground plane for thermal management.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700T-3002E/MB and XC6206P302MR-G, the NCP140AMXC300TCG uniquely combines capacitor-free stability, active discharge, thermal protection, and sub-0.8 mm² footprint - making it optimal for miniaturized, battery-sensitive, and safety-aware designs where all three features are concurrently required.

Availability

NCP140AMXC300TCG is available at Aetrix Electronics and suitable for battery-powered wearables, smartphone subsystem rails, and portable medical monitors requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for NCP140AMXC300TCG 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 silicon solutions for automotive, industrial, cloud, and IoT applications.

The NCP140 series belongs to onsemi's precision analog LDO portfolio, engineered specifically for ultra-low-power, space-constrained portable electronics where capacitor elimination, low noise, and robust protection are mandatory design requirements.

FAQ

What is the dropout voltage of the NCP140AMXC300TCG at 150 mA load?

The NCP140AMXC300TCG exhibits a typical dropout voltage of 115 mV at 150 mA load for its 3.0 V output. This value is derived from family characterization data correlating closely with the 125 mV spec for the 3.3 V variant (NCP140AMXC330TCG) and confirmed by load regulation curves in the datasheet. It enables reliable regulation down to an input voltage of 3.115 V.

Does the NCP140AMXC300TCG require input or output capacitors to remain stable?

No, the NCP140AMXC300TCG is explicitly designed for capacitor-free operation - it remains stable with or without input and output capacitors. This is achieved through internal compensation and PMOS pass transistor topology. Capacitors may be added to improve PSRR or transient response, but they are never required for loop stability.

Is active output discharge supported on the NCP140AMXC300TCG?

Yes, the "A" suffix in NCP140AMXC300TCG confirms active output discharge functionality. When the EN pin is driven below 0.4 V, an internal 100 Ω pull-down resistor connects the OUT pin to GND, rapidly discharging the output node - critical for controlled power-down sequencing in multi-rail systems.

What package type and dimensions does the NCP140AMXC300TCG use?

The NCP140AMXC300TCG uses the XDFN4 package (Case 711BF), measuring 0.8 mm × 0.8 mm × 0.4 mm with 0.48 mm pitch. It features an exposed thermal pad that must be soldered to a PCB ground plane using at least four thermal vias to achieve the specified R_JA of 252°C/W.

What is the maximum junction temperature and thermal shutdown behavior of the NCP140AMXC300TCG?

The NCP140AMXC300TCG triggers thermal shutdown at a typical junction temperature of 160°C, with a 20°C hysteresis (reset at ~140°C). This protects against catastrophic failure during sustained overload or poor PCB thermal design. The device remains latched off until die temperature falls below the reset threshold, preventing oscillatory shutdown/restart.