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NCP1411

更新时间： 2024-09-18 22:54:31
品牌 Logo 应用领域
安森美 - ONSEMI 转换器电池
页数 文件大小 规格书
14页 136K
描述
Sync-Rect PFM Step-Up DC-DC Converter with Low-Battery Detector and Ring-Killer

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NCP1411 数据手册

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NCP1411  
Sync−Rect PFM Step−Up  
DC−DC Converter with  
Low−Battery Detector and  
Ring−Killer  
http://onsemi.com  
NCP1411 is a monolithic micropower high frequency Boost  
(step−up) voltage switching converter IC specially designed for  
battery operated hand−held electronic products up to 250 mA 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. Low−Battery Detector, Logic−Controlled Shutdown and  
Cycle−by−Cycle Current Limit provide value−added features for  
various battery−operated applications. The innovative Ring−Killer  
circuitry guarantees quiet operation in discontinuous conduction  
mode. With all these functions ON, the device quiescent supply  
current is only 9.0 mA typical. This device is available in the space  
saving compact Micro8t package.  
MARKING  
DIAGRAM  
Micro8  
DM SUFFIX  
CASE 846A  
A2  
AYW  
8
1
A2 = Device Marking  
A
Y
W
= Assembly Location  
= Year  
Features  
= Work Week  
• Pb−Free Package is Available  
• High Efficiency, up to 92%  
• Very Low Device Quiescent Supply Current of 9.0 mA Typical  
PIN CONNECTIONS  
• Built−in Synchronous Rectifier (P−FET) Eliminates One External  
Schottky Diode  
FB  
OUT  
LX  
1
2
3
4
8
7
6
5
LBI/EN  
LBO  
• High Switching Frequency (up to 600 kHz) Allows use of Small Size  
Inductor  
GND  
BAT  
• High Accuracy Reference Output, 1.19 V $ 0.6% @ 25°C, can  
REF  
supply more than 2.5 mA when V  
≥ 3.3 V  
OUT  
• Ring−Killer for Quiet Operation in Discontinuous Conduction Mode  
• 1.0 V Startup at No Load Guaranteed  
(Top View)  
• Output Voltage from 1.5 V to 5.5 V Adjustable  
ORDERING INFORMATION  
• Output Current up to 250 mA @ V = 2.5 V, V  
= 3.3 V  
IN  
OUT  
Device  
Package  
Shipping†  
• Logic−Controlled Shutdown  
• Open Drain Low−Battery Detector Output  
• 1.0 A Cycle by Cycle Current Limit  
• Low Profile and Minimum External Parts  
• Compact Micro8 Package  
NCP1411DMR2  
Micro8  
4000 Tape & Reel  
4000 Tape & Reel  
NCP1411DMR2G  
Micro8  
(Pb−Free)  
†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.  
Typical Applications  
• Personal Digital Assistant (PDA)  
• Handheld Digital Audio Product  
• Camcorder and Digital Still Camera  
• Handheld Instrument  
• Conversion from One or Two NiMH or NiCd, or One Li−ion Cell  
to 3.3 V/5.0 V  
Semiconductor Components Industries, LLC, 2004  
1
Publication Order Number:  
October, 2004 − Rev. 3  
NCP1411/D  
1234567...14

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