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LM2640MTC-ADJ/NOPB PDF预览

LM2640MTC-ADJ/NOPB

更新时间： 2024-09-14 19:50:43
品牌 Logo 应用领域
美国国家半导体 - NSC 开关光电二极管
页数 文件大小 规格书
18页 497K
描述
IC DUAL SWITCHING CONTROLLER, 230 kHz SWITCHING FREQ-MAX, PDSO28, TSSOP-28, Switching Regulator or Controller

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LM2640MTC-ADJ/NOPB 技术参数

是否Rohs认证： 符合生命周期：Transferred
包装说明：TSSOP, TSSOP28,.25Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.18模拟集成电路 - 其他类型：DUAL SWITCHING CONTROLLER
控制模式：CURRENT-MODE控制技术：PULSE WIDTH MODULATION
最大输入电压：30 V最小输入电压：5.5 V
标称输入电压：10 VJESD-30 代码：R-PDSO-G28
JESD-609代码：e3长度：9.7 mm
湿度敏感等级：3功能数量：1
端子数量：28封装主体材料：PLASTIC/EPOXY
封装代码：TSSOP封装等效代码：TSSOP28,.25
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：260认证状态：Not Qualified
座面最大高度：1.2 mm子类别：Switching Regulator or Controllers
表面贴装：YES切换器配置：PUSH-PULL
最大切换频率：230 kHz端子面层：Matte Tin (Sn)
端子形式：GULL WING端子节距：0.65 mm
端子位置：DUAL处于峰值回流温度下的最长时间：40
宽度：4.4 mmBase Number Matches：1

LM2640MTC-ADJ/NOPB 数据手册

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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.  
Key Specifications  
n 96% efficient  
n 5.5 to 30V input range  
n Dual outputs adjustable from 2.2 to 6V  
n 0.5% typical load regulation error  
n 0.002%/V typical line regulation error  
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.  
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  
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.  
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  
© 2001 National Semiconductor Corporation  
DS100148  
www.national.com  
1234567...18

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