onsemi NCP4626DMX050TCG

Overview

NCP4626DMX050TCG from onsemi is a 300 mA CMOS low dropout linear regulator with reverse current protection, 5.0 V fixed output, 3.5–16 V input range, ±1.5% output accuracy in fast mode, and dual-mode ECO control (fast/low-power). It operates in digital home appliances and audio visual equipment where reverse voltage tolerance and stable low-noise power are required.

For engineers reviewing the NCP4626DMX050TCG datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at 300 mA (550 mV typ. in fast mode), quiescent current (6 µA typ. in low-power mode), PSRR (60 dB at 1 kHz), thermal shutdown (150 °C), and XDFN6 package compatibility with 1.6×1.6 mm PCB footprints.

Technical Context

The NCP4626DMX050TCG integrates a CMOS pass transistor with reverse current detection, enabling safe operation when VOUT exceeds VIN - critical for battery backup circuits. Its dual-mode ECO pin selects between fast mode (lower dropout, better transient response) and low-power mode (6 µA IQ), with independent voltage reference and fold-back current limiting.

Thermal shutdown activates at 150 °C junction temperature and releases at 130 °C, enabling self-protecting restart behavior. The device is stable with 2.2 µF ceramic input and 4.7 µF ceramic output capacitors, eliminating need for electrolytic or tantalum types.

Key Specifications

Pinout & Package

Package: XDFN6 (1.6×1.6 mm, 0.5 mm pitch, exposed thermal pad connected to GND). Compact footprint suits space-constrained consumer electronics PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1703T-5002E/MB and TLC7705QPWRQ1, the NCP4626DMX050TCG uniquely combines reverse current protection, dual-mode ECO control, and auto-discharge in a 1.6×1.6 mm XDFN6 package - making it optimal for space-constrained consumer and industrial systems requiring fail-safe power sequencing and backup operation.

Availability

NCP4626DMX050TCG is available at Aetrix Electronics and suitable for digital home appliances, audio visual equipment, and battery backup circuits requiring stable component supply, long-term lifecycle support, and Pb-free compliance.

Supply support for NCP4626DMX050TCG 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, medical, and IoT applications.

The NCP4626 series targets cost-sensitive, space-constrained consumer and industrial systems needing reliable, low-noise, reverse-protected LDO regulation with flexible power modes.

FAQ

What is the maximum input voltage rating for the NCP4626DMX050TCG?

The NCP4626DMX050TCG has an absolute maximum input voltage rating of 18.0 V. Operation above this level risks permanent damage. Recommended operating input range is 3.5 V to 16.0 V, ensuring proper regulation and thermal margin across temperature extremes. This rating applies regardless of ECO mode or load condition.

Does the NCP4626DMX050TCG require external components for stability?

Yes - the NCP4626DMX050TCG requires a minimum 2.2 µF ceramic capacitor on VIN and 4.7 µF ceramic capacitor on VOUT, placed as close as possible to their respective pins. These values ensure stability, adequate line/load transient response, and PSRR performance. No ESR requirements or additional compensation networks are needed.

How does the ECO pin affect dropout voltage in the NCP4626DMX050TCG?

When the ECO pin is driven high (fast mode), dropout voltage is 550 mV typical at 300 mA output. When pulled low (low-power mode), dropout increases to 700 mV typical at same load. This trade-off reflects internal bias current reduction - lower IQ comes at the cost of higher conduction loss and reduced headroom.

What is the purpose of the NC pin on the NCP4626DMX050TCG XDFN6 package?

Pin 2 of the NCP4626DMX050TCG XDFN6 package is marked NC (No Connection) and is not electrically bonded. It serves no functional role and must remain unconnected on the PCB. Unlike GND or thermal pad pins, it carries no current, voltage, or thermal function - leaving it floating poses no risk.

Is the NCP4626DMX050TCG compatible with lead-free reflow processes?

Yes - the NCP4626DMX050TCG is Pb-free and qualified for standard lead-free reflow profiles per JEDEC J-STD-020. Its XDFN6 package supports peak temperatures up to 260 °C for 20–40 seconds. The exposed thermal pad enhances solder joint reliability and thermal transfer during assembly.