描述 Description

The NCV8843 is a 1.5 A buck regulator IC operating at a fixed frequency of 340 kHz. The device employs the V2? control architecture to provide unmatched transient response, the best overall regulation and the simplest loop compensation. The NCV8842 accommodates input voltages from 4.0 V to 40 V and contains synchronization circuitry. The on-chip NPN transistor is capable of providing a minimum of 1.5 A of output current and is biased by an external boost capacitor to ensure saturation, thus minimizing on-chip power dissipation. Protection circuitry includes thermal shutdown, cycle-by-cycle current limiting and frequency foldback short-circuit protection.

特性 Features

? V2? Control Architecture
? Ultra-fast Transient Response, Improved Regulation and Simplified Design
? 2.0% Error Amp Reference Voltage Tolerance
? Tight Output Regulation
? Cycle-by-Cycle Current Limiting
? Limits Switch and Inductor Current
? Switch Frequency Decrease of 4:1 in Short Circuit
? Reduces Short Circuit Power Dissipation
? Bootstrapped Operation (BOOST)
? Increased Efficiency and Minimized On-Chip Power Dissipation
? Synchronization to External Clock (SYNC)
? Synchronization to External Clock (SYNC)
? 1.0 A Shutdown Quiescent Current
? Minimize Current Consumption when SHDNB is Asserted
? Thermal Shutdown
? Protect IC from Over-Temperature
? Soft-Start
? Decrease Inrush Current and Minimize Output Over-shoot During Start-Up
? Pb-Free Packages are Available

應(yīng)用 Application

? Automotive
? Industrial
? Dc-dc power supplies

簡介

NCV8843屬于集成電路（IC）的穩(wěn)壓器-DC-DC開關(guān)穩(wěn)壓器。由制造生產(chǎn)的NCV8843穩(wěn)壓器 - DC-DC 開關(guān)穩(wěn)壓器DC-DC 開關(guān)穩(wěn)壓器 PMIC（電源管理集成電路）產(chǎn)品族中的產(chǎn)品是元器件級設(shè)備，用于需要穩(wěn)定 DC 輸入電壓和/或?qū)⑵滢D(zhuǎn)換為不同幅度的輸出電壓的應(yīng)用。這些器件與稱為“控制器”PMIC 的類似產(chǎn)品的區(qū)別在于集成了主開關(guān)元件，設(shè)備提供的電力會通過該元件。