onsemi NCP103AMX360TCG

Overview

NCP103AMX360TCG from onsemi is a 150 mA CMOS low-dropout linear regulator with fixed 3.6 V output, active output discharge function, ±1% output voltage accuracy at room temperature, 75 mV typical dropout at 150 mA, and stable operation with only 1 µF ceramic output capacitor. It serves as a precision, low-noise power supply for noise-sensitive battery-powered systems such as GPS modules and portable medical sensors.

For engineers reviewing the NCP103AMX360TCG datasheet, pinout, applications, or equivalent options, this page delivers verified technical context, real-world design implications of key specs (e.g., 50 µA quiescent current, 75 dB PSRR at 1 kHz), and validated alternative options for space-constrained, low-power LDO selection.

Technical Context

The NCP103AMX360TCG integrates a PMOS pass transistor with dynamic quiescent current adjustment to maintain ultra-low IQ (50 µA typ.) across load and input voltage variations. Its internal bandgap reference and error amplifier deliver ±1% output accuracy over −40°C to +85°C, while thermal shutdown (160°C) and current limiting (550 mA typ.) ensure robust fault protection.

Unlike standard LDOs, this variant includes an active output discharge circuit (R_DIS = 100 Ω typ.) activated during shutdown, enabling rapid V_OUT decay to GND-critical for sequencing in multi-rail systems. Stability is guaranteed with 1 µF X5R/X7R ceramic capacitors and no ESR requirement on C_OUT.

Key Specifications

Pinout & Package

Package: uDFN4 1.0 mm × 1.0 mm, 0.65 mm pitch, exposed pad (Case 517CU). Thermal resistance R_JA = 170 °C/W on 1 oz FR-4 with 645 mm² copper area.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700T-3602E/TT and XC6206P362MR-G, the NCP103AMX360TCG uniquely combines active discharge, 70 mV dropout, and 75 dB PSRR-making it optimal for noise-critical, multi-rail embedded systems requiring fast, safe power sequencing and extended battery life.

Availability

NCP103AMX360TCG is available at Aetrix Electronics and suitable for GPS receivers, portable medical sensors, Bluetooth LE audio devices, and industrial wireless sensor nodes requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for NCP103AMX360TCG 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 innovation for automotive, industrial, cloud, and IoT applications.

The NCP103AMX360TCG belongs to onsemi's precision LDO family designed specifically for battery-powered, space-constrained systems demanding ultra-low IQ, fast transient response, and integrated protection-targeting portable medical, wearables, and wireless edge devices.

FAQ

What is the output voltage tolerance of the NCP103AMX360TCG over temperature?

The NCP103AMX360TCG maintains ±1% output voltage accuracy at room temperature (25°C). Over the full operating junction temperature range (−40°C to +85°C), output voltage deviation is specified as ±40 mV for V_OUT ≤ 2.0 V and ±2% for V_OUT > 2.0 V. Since the NCP103AMX360TCG is a 3.6 V device, its tolerance is ±2% (±72 mV) across temperature, confirmed in the Electrical Characteristics table on page 3 of the datasheet.

Does the NCP103AMX360TCG require an external resistor for enable functionality?

No, the NCP103AMX360TCG does not require an external resistor for enable functionality. Its EN pin features an internal 300 nA pull-down current source, ensuring the device remains disabled when the EN pin is left floating. If enable control is not needed, EN may be directly tied to IN-no external components are required for basic operation of the NCP103AMX360TCG.

Can the NCP103AMX360TCG operate with a 1.8 V input supply?

No, the NCP103AMX360TCG cannot regulate at 3.6 V output with a 1.8 V input. Its minimum operating input voltage is 1.7 V, but the dropout voltage at 150 mA is 70 mV (typical) for V_OUT = 3.6 V-requiring VIN ≥ 3.67 V to sustain regulation. At 1.8 V input, the device enters dropout and cannot maintain 3.6 V output; it is intended for use with ≥3.0 V sources such as single-cell Li-ion or USB supplies.

What is the purpose of the exposed pad on the NCP103AMX360TCG package?

The exposed pad on the NCP103AMX360TCG uDFN4 package must be soldered directly to the PCB ground plane. It serves two critical functions: (1) thermal conduction-reducing junction-to-ambient thermal resistance (R_JA = 170 °C/W) to prevent overheating under 150 mA load; and (2) electrical grounding-minimizing noise coupling into the GND reference path. Per the datasheet, failure to connect the exposed pad compromises both thermal performance and regulation stability of the NCP103AMX360TCG.

Is the NCP103AMX360TCG pin-compatible with other variants in the NCP103 family?

Yes, all NCP103 variants-including NCP103AMX360TCG, NCP103AMX310TCG, and NCP103BMX185TCG-share identical uDFN4 1.0×1.0 mm pinout (IN, GND, EN, OUT) and mechanical footprint (Case 517CU). The "A" suffix denotes active output discharge capability, while "B" variants omit it-but pin assignment, spacing, and mounting requirements are fully interchangeable, enabling voltage-option flexibility without PCB redesign for the NCP103AMX360TCG.