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LM2688M-ADJ PDF预览

LM2688M-ADJ

更新时间: 2024-11-06 03:11:07
品牌 Logo 应用领域
美国国家半导体 - NSC 稳压器开关式稳压器或控制器电源电路开关式控制器微处理器光电二极管
页数 文件大小 规格书
8页 147K
描述
Non-synchronous Step-down Controller for Pentium Microprocessors

LM2688M-ADJ 技术参数

是否Rohs认证: 不符合生命周期:Obsolete
Reach Compliance Code:unknownECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.92
Is Samacsys:N模拟集成电路 - 其他类型:SWITCHING REGULATOR
控制模式:VOLTAGE-MODE控制技术:PULSE WIDTH MODULATION
最大输入电压:40 V最小输入电压:4.5 V
标称输入电压:12 VJESD-30 代码:R-PDSO-G8
JESD-609代码:e0功能数量:1
端子数量:8最大输出电流:1.4 A
封装主体材料:PLASTIC/EPOXY封装代码:SOP
封装等效代码:SOP8,.25封装形状:RECTANGULAR
封装形式:SMALL OUTLINE峰值回流温度(摄氏度):NOT SPECIFIED
认证状态:Not Qualified子类别:Switching Regulator or Controllers
表面贴装:YES切换器配置:SINGLE
最大切换频率:173 kHz技术:BIPOLAR
端子面层:Tin/Lead (Sn/Pb)端子形式:GULL WING
端子节距:1.27 mm端子位置:DUAL
处于峰值回流温度下的最长时间:NOT SPECIFIEDBase Number Matches:1

LM2688M-ADJ 数据手册

 浏览型号LM2688M-ADJ的Datasheet PDF文件第2页浏览型号LM2688M-ADJ的Datasheet PDF文件第3页浏览型号LM2688M-ADJ的Datasheet PDF文件第4页浏览型号LM2688M-ADJ的Datasheet PDF文件第5页浏览型号LM2688M-ADJ的Datasheet PDF文件第6页浏览型号LM2688M-ADJ的Datasheet PDF文件第7页 
July 1997  
LM2688  
Non-synchronous Step-down Controller for Pentium  
Microprocessors  
General Description  
Features  
n Adjustable output voltage  
n Available in 8-pin surface mount  
n Guaranteed 0.5A gate drive current  
n Supply voltage up to 40V  
n 150 kHz fixed frequency internal oscillator  
n TTL shutdown capability  
The LM2688 is a low-cost non-synchronous voltage-mode  
PWM controller which maintains an accurate and adjustable  
output voltage for high current, low voltage DC/DC applica-  
tions such as the Pentium microprocessor family. By using  
different combinations of feedback resistors, the regulator  
output voltage can be precisely adjusted to match different  
requirements. Coming in an 8-lead surface mount package,  
the LM2688 can be used to control a buck regulator with an  
load current up to 10A. An on-chip precision trimmed refer-  
ence allows tight voltage regulation and an internal 150 kHz  
<
n Low power standby mode, IQ typically 85 µA  
n Thermal shutdown and current limit protection  
fixed-frequency oscillator eliminates extra components to set Applications  
the switching frequency. The LM2688 also provides an ON/  
n Controller for voltage regulators for Pentium, Pentium  
MMX, K5, K6 MMX, Alpha and PowerPC processors  
n Efficient pre-regulator for linear regulators  
OFF pin which enables the CPU to shutdown the regulator  
when necessary. Self protection features include a two stage  
current limit for the output switch and an over temperature  
shutdown for complete protection under fault conditions. The  
controller also provides internal loop gain compensation,  
minimizing the number of external components.  
Typical Application  
Pentium Processor Power Supply  
DS100050-1  
For more information about the above application, please refer to the Application Hints section.  
© 1997 National Semiconductor Corporation  
DS100050  
www.national.com  

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