onsemi NCP103AMX250TCG

Overview

NCP103AMX250TCG from onsemi is a 150 mA CMOS low-dropout linear regulator with fixed 2.5 V output, active output discharge function, ±1% output voltage accuracy at room temperature, 75 mV typical dropout at 150 mA (V_OUT = 2.5 V), and stable operation with only 1 µF ceramic output capacitor - designed for space-constrained, noise-sensitive battery-powered systems such as portable medical devices and wireless handsets.

For engineers reviewing the NCP103AMX250TCG datasheet, pinout, applications, or equivalent options, key selection criteria include its ultra-low quiescent current (50 µA typ.), high PSRR (75 dB at 1 kHz), thermal shutdown protection, EN-controlled enable/disable with active discharge, and uDFN4 1.0 × 1.0 mm package compatibility with tight PCB layouts.

Technical Context

The NCP103AMX250TCG employs a PMOS pass transistor architecture enabling low dropout and inherent reverse-current blocking. Its dynamic quiescent current adjustment minimizes IQ across load conditions, while internal bandgap reference and error amplifier deliver ±1% output accuracy over −40°C to +85°C.

It integrates EN logic with hysteresis (0.4 V low threshold / 0.9 V high threshold), thermal shutdown (160°C trip, 20°C hysteresis), current limiting (550 mA typ.), and an active output discharge MOSFET (100 Ω typical) - all implemented in a single-die CMOS process optimized for portable power integrity.

Key Specifications

Pinout & Package

Package: uDFN4 1.0 × 1.0 mm, 0.65 mm pitch, exposed pad (EPAD) for thermal dissipation - RoHS-compliant, halogen-free, Pb-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700T-2502E/MB and XC6206P252MR-G, the NCP103AMX250TCG uniquely combines 150 mA capability, active output discharge, thermal protection, and 1.0 × 1.0 mm footprint - making it optimal for space-constrained, safety-aware portable designs requiring controlled power-down.

Availability

NCP103AMX250TCG is available at Aetrix Electronics and suitable for portable medical equipment, Bluetooth LE wearables, and industrial IoT edge nodes requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for NCP103AMX250TCG 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 (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The NCP103AMX250TCG belongs to onsemi's high-performance LDO family engineered specifically for ultra-low-power, noise-sensitive portable electronics - emphasizing minimal IQ, small footprint, and robust protection in battery-constrained environments.

FAQ

What is the dropout voltage of the NCP103AMX250TCG at full load?

The NCP103AMX250TCG exhibits a typical dropout voltage of 72 mV at 150 mA output current and 2.5 V nominal output. Maximum dropout is 120 mV under worst-case conditions (−40°C to +85°C junction temperature). This allows regulation from as low as 2.572 V input, maximizing usable battery voltage range in single-cell systems.

Does the NCP103AMX250TCG support active output discharge, and how does it work?

Yes, the NCP103AMX250TCG includes active output discharge. When the EN pin voltage falls below 0.4 V, an internal 100 Ω NMOS transistor connects the OUT pin to GND, rapidly discharging the output capacitor. This feature ensures predictable power-down behavior and prevents floating voltages that could cause latch-up in downstream logic - a capability confirmed in the device's "PIN FUNCTION DESCRIPTION" and "APPLICATIONS INFORMATION" sections.

What output capacitor is required for stable operation of the NCP103AMX250TCG?

The NCP103AMX250TCG is stable with a minimum 1 µF X5R or X7R ceramic capacitor on the output. The datasheet confirms stability down to 0.22 µF (accounting for DC bias and temperature derating), but 1 µF is the recommended value for guaranteed performance across temperature, load, and input conditions. Tantalum capacitors are explicitly discouraged due to high ESR and temperature sensitivity.

What is the quiescent current specification for the NCP103AMX250TCG, and how does it vary with load?

The NCP103AMX250TCG features dynamic quiescent current adjustment: 50 µA typical at zero load, rising to 95 µA maximum across −40°C to +85°C. At 150 mA output, ground current remains below 550 µA. This architecture preserves ultra-low IQ in standby while supporting full load without sacrificing efficiency - a key differentiator versus fixed-IQ LDOs.

Is the NCP103AMX250TCG pin-compatible with other variants in the NCP103 family?

Yes, all NCP103 variants - including NCP103AMX250TCG, NCP103AMX180TCG, and NCP103BMX185TCG - share identical uDFN4 1.0 × 1.0 mm package and pinout (IN, EN, OUT, GND). Voltage options and presence of active discharge ('A' vs 'B' suffix) are the only functional differences; no PCB layout change is needed when substituting within the same package variant.