Datasheet > NCP1421D

NCP1421D

更新时间： 2024-09-19 22:54:31

品牌	Logo	应用领域
安森美 - ONSEMI		转换器
页数	文件大小	规格书
14页	119K
描述
600 mA Sync-Rect PFM Step-Up DC-DC Converter Step-Up DC-DC Converter with True-Cutoff and Ring-Killer

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NCP1421D 数据手册

NCP1421

600 mA Sync−Rect PFM

Step−Up DC−DC Converter

with True−Cutoff and

Ring−Killer

NCP1421 is a monolithic micropower high−frequency step−up

switching converter IC specially designed for battery−operated

hand−held electronic products up to 600 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 Micro8t package.

http://onsemi.com

MARKING

DIAGRAM

Micro8

DM SUFFIX

CASE 846A

1421

AYW

1421

= Device Code

= Assembly Location

= Year

= Work Week

Features

• Pb−Free Package is Available

• 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

PIN CONNECTIONS

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

OUT

LBI/EN

LBO

• Output Current up to 600 mA at V = 2.5 V and V

= 3.3 V

OUT

GND

BAT

• True−Cutoff Function Reduces Device Shutdown Current to

typically 50 nA

REF

• Anti−Ringing Ring−Killer for Discontinuous Conduction Mode

(Top View)

• High Accuracy Reference Output, 1.20 V $1.5%, can Supply

2.5 mA Loading Current when V

> 3.3 V

OUT

• Low Quiescent Current of 8.5 m 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

ORDERING INFORMATION

Device

Package

Shipping†

NCP1421DMR2

Micro8

4000 Tape & Reel

NCP1421DMR2G

Micro8

(Pb−Free)

• Multi−function Logic−Controlled Shutdown Pin

• On Chip Thermal Shutdown with Hysteresis

Typical Applications

†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.

• 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:

October, 2004 − Rev. 6

NCP1421/D

12 3 4 5 6 7...14

中文翻译

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与NCP1421D相关器件

型号	品牌	获取价格	描述	数据表
NCP1421DMR2	ONSEMI	获取价格	600 mA Sync-Rect PFM Step-Up DC-DC Converter Step-Up DC-DC Converter with True-Cutoff and
NCP1421DMR2G	ONSEMI	获取价格	600 mA Sync-Rect PFM Step-Up DC-DC Converter Step-Up DC-DC Converter with True-Cutoff and
NCP1422	ONSEMI	获取价格	800 mA Sync−Rect PFM Step−Up DC−DC Converter with True−Cutoff and
NCP1422/D	ETC	获取价格	800 mA Sync-Rect PFM Step-Up DC-DC Converter with True-Cutoff and Ring-Killer
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

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