Datasheet > NCP1422/D

NCP1422/D

更新时间： 2024-11-07 23:53:23

品牌	Logo	应用领域
其他 - ETC		转换器
页数	文件大小	规格书
14页	120K
描述
800 mA Sync-Rect PFM Step-Up DC-DC Converter with True-Cutoff and Ring-Killer

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NCP1422/D 数据手册

NCP1422

800 mA Sync−Rect PFM

Step−Up DC−DC Converter

with True−Cutoff and

Ring−Killer

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 m A. This device is available in the

compact and low profile DFN−10 package.

http://onsemi.com

MARKING

DIAGRAMS

1422

ALYW

DFN−10

MN SUFFIX

CASE 485C

1422

= Device Code

= Assembly Location

= Wafer Lot

= Year

= Work Week

Features

PIN CONNECTIONS

• 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

OUT

LBI/EN

• High Switching Frequency, up to 1.2 MHz (not hitting current limit)

DFN−10

LBO

• Output Current up to 800 mA at V = 2.5 V and V

= 3.3 V

OUT

• True−Cutoff Function Reduces Device Shutdown Current to

typically 50 nA

GND

REF

BAT

• Anti−Ringing Ring−Killer for Discontinuous Conduction Mode

• High Accuracy Reference Output, 1.20 V $1.5% @ 25°C, can

(Top View)

Supply 2.5 mA Loading Current when V

• Low Quiescent Current of 8.5 m A

• Integrated Low−Battery Detector

> 3.3 V

OUT

ORDERING INFORMATION

Device

NCP1422MNR2

Package

Shipping†

• Open Drain Low−Battery Detector Output

• 1.0 V Startup at No Load Guaranteed

DFN−10 3000 Tape & Reel

• 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

†For information on tape and reel specifications,

including part orientation and tape sizes, please

refer to our Tape and Reel Packaging Specifications

Brochure, BRD8011/D.

• Housed in Space−Saving and Low Profile DFN−10 Package

Typical Applications

• Personal Digital Assistants (PDA)

• Handheld Digital Audio Products

• Camcorders and Digital Still Cameras

• Hand−held Instruments

• Conversion from one to two Alkaline, NiMH, NiCd Battery Cells to

3.0−5.0 V or one Lithium−ion cells to 5.0 V

• White LED Flash for Digital Cameras

Semiconductor Components Industries, LLC, 2004

Publication Order Number:

February, 2004 − Rev. P0

NCP1422/D

12 3 4 5 6 7...14

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与NCP1422/D相关器件

型号	品牌	获取价格	描述	数据表
NCP1422MNR2	ONSEMI	获取价格	800 mA Sync−Rect PFM Step−Up DC−DC Converter with True−Cutoff and
NCP1422MNR2G	ONSEMI	获取价格	800 mA Sync−Rect PFM Step−Up DC−DC Converter with True−Cutoff and
NCP1423	ONSEMI	获取价格	400 mA Sync−Rect PFM Step−Up DC−DC Converter with True−Cutoff and
NCP1423DM	ONSEMI	获取价格	SWITCHING REGULATOR, 600kHz SWITCHING FREQ-MAX, PDSO10, MICRO PACKAGE, 10 PIN
NCP1423DMR2	ONSEMI	获取价格	400 mA Sync−Rect PFM Step−Up DC−DC Converter with True−Cutoff and
NCP1423DMR2G	ONSEMI	获取价格	400 mA Sync−Rect PFM Step−Up DC−DC Converter with True−Cutoff and
NCP1442	ONSEMI	获取价格	4.0 A 280 kHz/560 kHz Boost Regulators
NCP1442/D	ETC	获取价格	4.0 A 280 kHz/560 kHz Boost Regulators
NCP1442FR4	ONSEMI	获取价格	4.0 A 280 kHz/560 kHz Boost Regulators
NCP1442FR4G	ONSEMI	获取价格	4.0 A 280 kHz/560 kHz Boost Regulators

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