描述 Description

NCP1423 is a monolithic micropower high frequency step-up switching converter IC specially designed for battery operated hand-held electronic products up to 400mA loading. It integrates Synchronous Rectifier for improving efficiency as well as eliminating the external Schottky Diode. High switching frequency (up to 600 KHz) allows low profile inductor and output capacitor being used. When the IC is disabled, internal conduction path from LX or BAT to OUT is blocked, OUT pin is isolated from the battery. This achieves True-Cutoff. Ring-Killer is also integrated to eliminate the high frequency ringing in discontinuous conduction mode. Low-Battery Detector, Cycle-by-Cycle Current Limit, Overvoltage-Protection and Thermal Shutdown provide value-added features for various battery operated application. With all these functions ON, the quiescent supply current is only 9.0uA. This device is available in compact Micro-10 package

特性 Features

? High Switching Frequency, up to 600 kHz
? Low Quiescent Current of 9.0 uA
? Low Battery Detector
? 0.8 V Startup at No Load Guaranteed
? Ring-Killer for Discontinuous Conduction Mode
? Thermal Shutdown
? 1.2 A Cycle by Cycle Current Limit
? Output Current up to 400 mA @ VOUT = 3.3 V, 200 mA @ VOUT = 1.8 V
? Overvoltage Protection
? Low Profile and Minimum External Part
? Open Drain Low-Battery Detector Output
? Compact Micro-10 Package
? Pb-Free Package is Available

應(yīng)用 Application

? Wireless Optical Mouse
? Wireless Headsets
? Internet Audio Players
? Personal Digital Assistants (PDAs)
? Handheld Instruments
? Conversion from one/two NiMH or NiCd cells to 1.8 V / 3.3 V

簡介

NCP1423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NCP1423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。