Series:	*
Packaging:	Tape & Reel (TR)
Part Status:	Active
Mounting Type:	Surface Mount
Package / Case:	16-TSSOP (0.173", 4.40mm Width) Exposed Pad
Supplier Device Package:	16-HTSSOP

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LM46000AQPWPRQ1 Application Field and Working Principle

IntroductionThe LM46000AQPWPRQ1 is an ultra-low quiescent current voltage regulator optimized for extended battery life. It comes in an 8-pin hermetic QFN package and is suitable for a wide range of applications including handheld battery-powered circuits and ultra low-power wearable devices. The LM46000\'s integrated low-dropout linear regulator and MOSFETs enable system voltage to be efficiently regulated, while providing an adjustable output range of 0.7V to 6V.Application FieldThe LM46000AQPWPRQ1 is well-suited for a variety of applications, including handheld and battery-powered devices, wearable devices, IoT devices, and battery-backup systems. It is ideal for applications where low quiescent current and high power efficiency are critical.Working PrincipleThe LM46000AQPWPRQ1 is a fully integrated, ultra-low quiescent current, wide input voltage range regulator. The integrated MOSFET, Zener diode and low-dropout (LDO) linear regulator allow voltage to be regulated up to 6V at up to 150mA output current. The MOSFET, LDO, and Zener diode are connected in series to form a low-quiescent current buck-boost regulator. Under normal conditions, the MOSFET and LDO both operate in buck mode. If the input voltage drops below the minimum regulation point, the LDO enters linear operation and the MOSFET follows in bypassing mode, causing the output voltage to increase and ensure the load remains powered. Similarly, when the input voltage rises above the maximum regulation point, the LDO enters linear operation and the MOSFET enters bypassing mode, causing the output voltage to decrease and maintain the required load voltage.The LM46000AQPWPRQ1 features integrated overvoltage protection and short-circuit protection to protect the device from damage in the event of a system fault. It is also equipped with programmable soft-start, adjustable output voltage, and enable pins to integrate the regulator into the system.ConclusionThe LM46000AQPWPRQ1 is an ideal DC-DC switching regulator for a variety of low-power applications. It features ultra-low quiescent current and adjustable output voltage, making it well suited for extended battery life applications. It provides high power efficiency and overvoltage and short-circuit protection to protect the device and system.

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