onsemi NCP4626HSN045T1G

Overview

NCP4626HSN045T1G from onsemi is a 300 mA CMOS low dropout linear voltage regulator with reverse current protection, 4.5 V fixed output, 3.5–16 V input range, ±1.5% output accuracy in fast mode, and dual-mode ECO pin 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 NCP4626HSN045T1G datasheet, pinout, applications, or equivalent options, key selection factors 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 compatibility with 2.2 µF input / 4.7 µF output ceramic capacitors.

Technical Context

The NCP4626HSN045T1G integrates a precision bandgap reference, fold-back current limiting, reverse current detection circuitry, and thermal shutdown protection. Its ECO pin selects between fast mode (lower dropout, better transient response) and low-power mode (6 µA IQ), enabling dynamic trade-offs between efficiency and performance.

It features internal N-channel pass transistor architecture with reverse current blocking, stable operation with minimal external components, and robust protection against overcurrent, overtemperature, and input overvoltage (up to 18 V absolute max).

Key Specifications

Pinout & Package

Package: SOT-23-5 (Case 1212), Pb-free, 2.7 mm × 2.5 mm footprint, exposed pad not present (non-thermal enhanced variant).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700T-4502E/TT and TLS850F0TES/V0X, the NCP4626HSN045T1G uniquely balances 300 mA capability, 6 µA low-power mode, reverse current blocking, and industrial temperature range (−40°C to +85°C) in a cost-effective SOT-23-5 package - making it optimal for consumer and industrial embedded systems requiring reliability and design flexibility.

Availability

NCP4626HSN045T1G 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 NCP4626HSN045T1G 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 focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud, and IoT markets.

The NCP4626 series belongs to onsemi's precision analog LDO portfolio, designed specifically for space-constrained, low-noise, reverse-voltage-tolerant power management in consumer and industrial embedded systems.

FAQ

What is the maximum input voltage rating for the NCP4626HSN045T1G?

The NCP4626HSN045T1G has an absolute maximum input voltage rating of 18 V. Its recommended operating input range is 3.5 V to 16.0 V. Exceeding 18 V may cause permanent damage. This rating enables use with 12 V nominal rails and transient-tolerant industrial supplies.

Does the NCP4626HSN045T1G provide reverse current protection, and how does it work?

Yes, the NCP4626HSN045T1G includes integrated reverse current protection. When VOUT exceeds VIN (e.g., during backup power switchover), the internal circuitry blocks reverse current flow to less than 0.1 µA. This eliminates need for external blocking diodes and prevents backfeed in dual-source systems.

What are the key differences between fast mode and low-power mode on the NCP4626HSN045T1G?

In fast mode (ECO = VIN), the NCP4626HSN045T1G achieves 550 mV typical dropout at 300 mA and ±1.5% output accuracy, but draws higher quiescent current. In low-power mode (ECO = GND), IQ drops to 6 µA typ., though dropout rises to 700 mV and accuracy degrades to ±2.5% - enabling firmware-controlled trade-offs.

Can the NCP4626HSN045T1G operate with ceramic capacitors, and what values are required?

Yes, the NCP4626HSN045T1G is optimized for ceramic capacitors. It requires a minimum 2.2 µF X7R/X5R ceramic capacitor on VIN and 4.7 µF on VOUT, placed as close as possible to the respective pins. These values ensure stability, low noise, and robust transient response across temperature and load.

Is thermal shutdown protection included in the NCP4626HSN045T1G, and what are its thresholds?

Yes, the NCP4626HSN045T1G includes internal thermal shutdown protection that activates at 150°C junction temperature and releases at 130°C. This hysteresis prevents oscillation during overload. The SOT-23-5 package has a thermal resistance of 238°C/W (junction-to-air), so proper PCB copper area is essential for high-current operation.