音影先锋亚洲天堂网|电影世界尽头的爱完整版播放|国产 熟女 91|高清无码免费观看欧美日韩|韩国一区二区三区黄色录像|美女亚洲加勒比在线|亚洲综合网 开心五月|7x成人在线入口|成人网站免费日韩毛片区|国产黄片?一级?二级?三级

LM2640MTC-ADJ Datasheet

  • LM2640MTC-ADJ

  • Dual Adjustable Step-Down Switching Power Supply Controller

  • 487.59KB

  • 19頁

  • NSC

掃碼查看芯片數(shù)據(jù)手冊

上傳產(chǎn)品規(guī)格書

PDF預(yù)覽

LM2640 Dual Adjustable Step-Down Switching Power Supply Controller
May 2001
LM2640
Dual Adjustable Step-Down Switching Power Supply
Controller
General Description
The LM2640 is a dual step-down power supply controller
intended for application in notebook personal computers and
other battery-powered equipment.
Fixed-frequency synchronous drive of logic-level N-channel
power MOSFETs is combined with an optional
pulse-skipping mode to achieve ultra efficient power conver-
sion over a 1000:1 load current range. The pulse-skipping
mode can be disabled in favor of fixed-frequency operation
regardless of the load current level.
High DC gain and current-mode feedback control assure
excellent line and load regulation and a wide loop bandwidth
for fast response to dynamic loads.
An internal oscillator fixes the switching frequency at
200 kHz. Optionally, switching can be synchronized to an
external clock running as fast as 400 kHz.
An optional soft-start feature limits current surges from the
input power supply at start up and provides a simple means
of start-up sequencing.
Logic-level inputs allow the controllers to be turned ON and
OFF separately.
Key Specifications
n
n
n
n
n
96% efficient
5.5 to 30V input range
Dual outputs adjustable from 2.2 to 6V
0.5% typical load regulation error
0.002%/V typical line regulation error
Features
n
200 kHz fixed-frequency switching
n
Switching synchronization with an external signal up to
400 kHz
n
Optional pulse-skipping mode
n
Adjustable secondary feedback
n
Input undervoltage lockout
n
Output undervoltage shutdown protection
n
Output overvoltage shutdown protection
n
Programmable soft-start (each controller)
n
5V, 50 mA linear regulator output
n
Precision 2.5V reference output
n
28-pin TSSOP
Applications
n
Notebook and subnotebook computers
n
Wireless data terminals
n
Battery-powered instruments
Connection Diagram and Ordering Information
28-Lead TSSOP (MTC)
10014801
Top View
Order Number LM2640MTC-ADJ
See NS Package Number MTC28
漏 2001 National Semiconductor Corporation
DS100148
www.national.com

LM2640MTC-ADJ 產(chǎn)品屬性

  • National Semiconductor (TI)

  • 5.5 V to 30 V

  • 2.2 V to 6 V

  • 20 A

  • 2

  • + 125 C

  • SMD/SMT

  • TSSOP-28

  • 0 C

  • Tube

  • 48

LM2640MTC-ADJ相關(guān)型號PDF文件下載

您可能感興趣的PDF文件資料

熱門IC型號推薦

掃碼下載APP，
一鍵連接廣大的電子世界。

在線人工客服

買家服務(wù)：
賣家服務(wù)：
技術(shù)客服：

0571-85317607

網(wǎng)站技術(shù)支持

13606545031

客服在線時間周一至周五
9:00-17:30

關(guān)注官方微信號，
第一時間獲取資訊。

建議反饋
返回頂部

建議反饋

聯(lián)系人：

聯(lián)系方式：

按住滑塊，拖拽到最右邊
>>
感謝您向阿庫提出的寶貴意見，您的參與是維庫提升服務(wù)的動力！意見一經(jīng)采納，將有感恩紅包奉上哦！