NCP1422 Boost Converter -Sync-Rect, PFM, DC-DC, True-Cutoff, Ring-Killer 800 mA

PublishTime：2022-03-07

●NCP1422 is a monolithic micropower high−frequency step−up switching converter IC specially designed for battery−operated hand−held electronic products up to 800 mA loading. It integrates Sync−Rect to improve efficiency and to eliminate the external Schottky Diode. High switching frequency (up to 1.2 MHz) allows for a low profile, small−sized inductor and output capacitor to be used. When the device is disabled, the internal conduction path from LX or BAT to OUT is fully blocked and the OUT pin is isolated from the battery. This True−Cutoff function reduces the shutdown current to typically only 50 nA. Ring−Killer is also integrated to eliminate the high−frequency ringing in discontinuous conduction mode. In addition to the above, Low−Battery Detector, Logic−Controlled Shutdown, Cycle−by−Cycle Current Limit and Thermal Shutdown provide value−added features for various battery−operated applications. With all these functions on, the quiescent supply current is typically only 8.5 μA. This device is available in the compact and low profile DFN−10 package.
●Features
■High Efficiency:
▲94% for 3.3 V Output at 200 mA from 2.5 V Input
▲88% for 3.3 V Output at 500 mA from 2.5 V Input
■High Switching Frequency, up to 1.2 MHz (not hitting current limit)
■Output Current up to 800 mA at VIN = 2.5 V and V-OUT = 3.3 V
■True−Cutoff Function Reduces Device Shutdown Current to typically 50 nA
■Anti−Ringing Ring−Killer for Discontinuous Conduction Mode
■High Accuracy Reference Output, 1.20 V 1.5% @ 25°C, can Supply 2.5 mA Loading Current when V-OUT > 3.3 V
■Low Quiescent Current of 8.5 μ A
■Integrated Low−Battery Detector
■Open Drain Low−Battery Detector Output
■1.0 V Startup at No Load Guaranteed
■Output Voltage from 1.5 V to 5.0 V Adjustable
■1.5 A Cycle−by−Cycle Current Limit
■Multi−Function Logic−Controlled Shutdown Pin
■On Chip Thermal Shutdown with Hysteresis
■Pb−Free Package is Availabl

Brand of Product：	ON Semiconductor
Part#：	NCP1422 、 NCP1422MNR2 、 NCP1422MNR2G More Part#
Product Category：	Boost Converter 、 monolithic micropower high−frequency step−up switching converter IC More
Application：	[ Personal Digital Assistants ][ PDA ][ Handheld Digital Audio Products ][ Camcorders ][ Digital Still Cameras ][ Hand−held Instruments ][ Battery ][ White LED Flash ][ Digital Camer ] More
Data Type：	Datasheet More
Safety & Environment Standards：	More
Operating Temperature：	Please see the document for details
Qualification Grade：	More
Qualification Approval：	More
Package：	DFN−10
Language：	English Chinese Chinese and English Japanese
Date of Creation：	August, 2019
Version Number：	Rev. 4
Data Encoding：	NCP1422/D
Data Size：	280 KB

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