onsemi NCP4626HMX033TCG

Overview

NCP4626HMX033TCG from onsemi is a 3.3 V, 300 mA CMOS low dropout linear regulator with reverse current protection, ECO mode selector (fast/low-power), ±2.5% output accuracy in low-power mode, and stable operation with 2.2 µF input / 4.7 µF output ceramic capacitors. It operates across 3.5–16 V input and supports battery backup circuits where VOUT may exceed VIN.

For engineers reviewing the NCP4626HMX033TCG datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at 300 mA (700 mV typ. in low-power mode), quiescent current (6 µA typ.), thermal shutdown (150°C), PSRR (60 dB at 1 kHz), and XDFN6 package compatibility with space-constrained PCB layouts.

Technical Context

The NCP4626HMX033TCG integrates a reverse-current detector, fold-back current limiting, and thermal shutdown circuitry to protect against overcurrent, overtemperature, and backfeed conditions. Its dual-mode ECO pin enables dynamic trade-off between quiescent current (6 µA) and transient response.

It uses an internal N-channel pass transistor with low-output impedance and achieves stable regulation without external compensation, requiring only standard ceramic decoupling capacitors. The device maintains ±2.5% output accuracy over −40°C to +85°C ambient in low-power mode.

Key Specifications

Pinout & Package

Package: 1.6 mm × 1.6 mm XDFN6 (Case 711AC), exposed thermal pad connected to GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700T-3302E/TT and TLS850B2TE/V33, the NCP4626HMX033TCG uniquely balances 300 mA capability, reverse-current blocking, dual-mode ECO control, and compact XDFN6 packaging - making it optimal for space-constrained industrial and consumer backup power designs where both efficiency and fault resilience matter.

Availability

NCP4626HMX033TCG 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 RoHS-compliant packaging.

Supply support for NCP4626HMX033TCG 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 is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The NCP4626 series belongs to onsemi's precision LDO portfolio designed specifically for power management in space- and efficiency-sensitive embedded systems requiring reverse-current protection and selectable operating modes.

FAQ

What is the maximum input voltage rating for the NCP4626HMX033TCG?

The NCP4626HMX033TCG has an absolute maximum input voltage rating of 18.0 V, with recommended operating input range from 3.5 V to 16.0 V. Exceeding 18 V risks permanent damage, even momentarily. This rating enables use with 12 V nominal systems subject to load-dump transients.

Does the NCP4626HMX033TCG provide reverse current protection, and how does it work?

Yes, the NCP4626HMX033TCG includes integrated reverse current protection that blocks current flow from VOUT to VIN when VOUT exceeds VIN by more than ~0.6 V. This is implemented via an internal reverse-current detector and gate control of the N-channel pass transistor - eliminating the need for an external blocking diode in battery backup configurations.

What are the key differences between fast mode and low-power mode on the NCP4626HMX033TCG?

In fast mode (ECO = VIN), the NCP4626HMX033TCG delivers lower dropout voltage (550 mV typ. at 300 mA) and better transient response but draws higher quiescent current (~50–100 µA). In low-power mode (ECO = GND), quiescent current drops to 6 µA typ., at the expense of higher dropout (700 mV typ.) and slower load regulation - enabling optimization for either performance or battery life.

Can the NCP4626HMX033TCG be used with ceramic output capacitors, and what value is required?

Yes, the NCP4626HMX033TCG is explicitly designed for stability with ceramic output capacitors. A minimum of 4.7 µF is required, and the device remains stable across the full rated load (1–300 mA) with standard X5R/X7R dielectrics. Larger values improve transient response but are not necessary for basic regulation.

What package type and footprint does the NCP4626HMX033TCG use, and is thermal pad connection mandatory?

The NCP4626HMX033TCG uses the 1.6 mm × 1.6 mm XDFN6 package (Case 711AC) with a bottom-exposed thermal pad internally connected to GND. While connecting the pad to a GND plane improves thermal performance and is strongly recommended, the datasheet states leaving it unconnected is acceptable - though junction temperature rise will increase significantly under load.