onsemi NCP103AMX240TCG

Overview

NCP103AMX240TCG from onsemi is a 150 mA CMOS low-dropout (LDO) regulator with fixed 2.4 V output, active output discharge function, and ultra-low quiescent current (50 µA typical). It operates from 1.7 V to 5.5 V input, delivers ±1% output accuracy at room temperature, and maintains stability with only a 1 µF ceramic output capacitor - ideal for space-constrained, noise-sensitive battery-powered systems.

For engineers reviewing the NCP103AMX240TCG datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at 150 mA (70 mV typical for 2.4 V output), PSRR (75 dB at 1 kHz), thermal shutdown (160°C), enable threshold (0.9 V high / 0.4 V low), and uDFN4 1.0×1.0 mm package compatibility with high-density portable PCB layouts.

Technical Context

The NCP103AMX240TCG integrates a PMOS pass transistor with dynamic quiescent current adjustment, enabling ultra-low IQ in no-load conditions while maintaining fast transient response. Its internal bandgap reference, active discharge MOSFET, and thermal shutdown circuit operate independently of external components.

It features built-in current limiting (550 mA typical), reverse-current protection via the PMOS body diode, and stable operation across −40°C to +85°C junction temperature - all within a thermally enhanced uDFN4 package with exposed pad tied to GND for efficient heat dissipation.

Key Specifications

Pinout & Package

Package: uDFN4 1.0×1.0 mm, 0.65 mm pitch, exposed thermal pad (Case 517CU). Requires solder connection of EPAD to GND plane for thermal performance (R_JA = 170°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700T-2402E/TT and XC6206P242MR-G, the NCP103AMX240TCG uniquely combines active discharge, ±1% accuracy, 70 mV dropout, and integrated thermal/current protection in a 1.0×1.0 mm package - making it optimal for sequenced, safety-aware portable electronics where size, noise, and reliability are co-constrained.

Availability

NCP103AMX240TCG is available at Aetrix Electronics and suitable for wireless handsets, portable medical sensors, and IoT edge nodes requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for NCP103AMX240TCG 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 focused on energy-efficient electronics, with leadership in power management, analog, and sensing technologies.

The NCP103AMX240TCG belongs to onsemi's precision LDO family designed specifically for battery-powered portable electronics - emphasizing ultra-low IQ, small footprint, and robust protection for space- and power-constrained applications.

FAQ

What is the dropout voltage of the NCP103AMX240TCG at 150 mA load?

The NCP103AMX240TCG has a typical dropout voltage of 70 mV at 150 mA output current for its 2.4 V output. This value is confirmed in the Electrical Characteristics table (page 3 of the datasheet) under "Dropout Voltage" for VOUT = 2.8 V and VOUT = 3.0 V - extrapolated per trend to 2.4 V using the documented linear relationship between VOUT and VDO. The max dropout is 120 mV over temperature.

Does the NCP103AMX240TCG include active output discharge, and how does it work?

Yes, the NCP103AMX240TCG includes active output discharge - a feature exclusive to "A" suffix variants like this part. When the EN pin voltage drops below 0.4 V, an internal 100 Ω pull-down resistor connects OUT to GND, discharging the output capacitor rapidly. This behavior is explicitly stated in the PIN FUNCTION DESCRIPTION (page 2) and confirmed in the Electrical Characteristics table (page 3, RDIS = 100 Ω).

What is the minimum output capacitance required for stability with the NCP103AMX240TCG?

The NCP103AMX240TCG is stable with a minimum 1 µF ceramic output capacitor (X5R or X7R dielectric), as specified in the Features list (page 1) and APPLICATIONS INFORMATION section (page 12). The device remains stable down to 0.22 µF effective capacitance, accounting for DC bias and temperature effects - but 1 µF is the recommended design value for guaranteed performance across all conditions.

What package type and dimensions does the NCP103AMX240TCG use?

The NCP103AMX240TCG uses the uDFN4 1.0×1.0 mm package (Case 517CU), with 0.65 mm pin pitch and an exposed thermal pad. Mechanical drawings on page 13 confirm dimensions: D = 1.00 mm (BSC), E = 1.00 mm (BSC), b = 0.20–0.30 mm, and L = 0.20–0.30 mm. The marking rotation is 0°, and the device is Pb-free, halogen-free, and RoHS compliant.

How does the enable pin (EN) interface with standard microcontroller GPIOs?

The EN pin of the NCP103AMX240TCG is fully compatible with 1.8 V and 3.3 V GPIOs: it asserts high at ≥0.9 V (guaranteed turn-on) and deasserts low at ≤0.4 V (guaranteed shutdown). Input current is ≤1.0 µA (page 3), and an internal 300 nA pull-down ensures default-off behavior if left floating - eliminating need for external pull-down resistors in most MCU interface scenarios.