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LM2637MX/NOPB PDF预览

LM2637MX/NOPB

更新时间： 2024-11-23 20:07:07
品牌 Logo 应用领域
德州仪器 - TI 信息通信管理开关光电二极管
页数 文件大小 规格书
21页 687K
描述
SWITCHING CONTROLLER, 1000kHz SWITCHING FREQ-MAX, PDSO24, SOIC-24

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中文翻译

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LM2637MX/NOPB 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Obsolete零件包装代码：SOIC
包装说明：SOP, SOP24,.4针数：24
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.22
模拟集成电路 - 其他类型：SWITCHING CONTROLLER控制模式：CURRENT-MODE
控制技术：PULSE WIDTH MODULATION最大输入电压：5.25 V
最小输入电压：4.75 V标称输入电压：5 V
JESD-30 代码：R-PDSO-G24JESD-609代码：e3
长度：15.4 mm湿度敏感等级：3
功能数量：1端子数量：24
封装主体材料：PLASTIC/EPOXY封装代码：SOP
封装等效代码：SOP24,.4封装形状：RECTANGULAR
封装形式：SMALL OUTLINE峰值回流温度（摄氏度）：260
认证状态：Not Qualified座面最大高度：2.65 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：1000 kHz
技术：BICMOS端子面层：Matte Tin (Sn)
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：40
宽度：7.5 mmBase Number Matches：1

LM2637MX/NOPB 数据手册

 浏览型号LM2637MX/NOPB的Datasheet PDF文件第2页浏览型号LM2637MX/NOPB的Datasheet PDF文件第3页浏览型号LM2637MX/NOPB的Datasheet PDF文件第4页浏览型号LM2637MX/NOPB的Datasheet PDF文件第5页浏览型号LM2637MX/NOPB的Datasheet PDF文件第6页浏览型号LM2637MX/NOPB的Datasheet PDF文件第7页 
OBSOLETE  
LM2637  
www.ti.com  
SNVS027A –MAY 2004–REVISED NOVEMBER 2004  
LM2637 Motherboard Power Supply Solution with a 5-Bit Programmable Switching  
Controller and Two Linear Regulator Controllers  
Check for Samples: LM2637  
1
FEATURES  
DESCRIPTION  
The LM2637 provides a comprehensive embedded  
power supply solution for motherboards hosting high  
performance MPUs such as M II™, Pentium™ II, K6-  
2 and other similar high performance MPUs. The  
234  
•
Provides 3 Regulated Voltages  
Power Good Flag and Output Enable  
Under-Voltage Latch-Off  
•
•
LM2637 incorporates  
a
5-bit programmable,  
–
Switching Section  
synchronous buck switching controller and two high-  
speed linear regulator controllers in a 24-pin SO  
package.  
•
•
•
•
•
•
•
•
Synchronous Rectification  
5-bit DAC Programmable from 3.5V to 1.3V  
Typical 1% DAC Tolerance  
Switching Section  
—
The switching regulator  
Switching Frequency: 50 kHz to 1 MHz  
Two Levels of Over-Voltage Protection  
Two Methods of Over-Current Protection  
Adaptive Non-Overlapping FET Gate Drives  
Soft Start Without External Capacitor  
controller features a 5-bit programmable DAC, over-  
current and over-voltage protection, under-voltage  
latch-off, a power good signal, and output enable.  
The 5-bit DAC has a typical tolerance of 1%. There  
are two user-selectable over-current protection  
methods. One provides accurate over-current  
protection with the use of an external sense resistor.  
The other saves cost by taking advantage of the  
rDS_ON of the high-side FET. The over voltage  
protection provides two levels of protection. The first  
level keeps the high-side FET off and the low-side  
FET on. The second provides a gate signal that can  
be used to fire an external SCR.  
–
Linear Section  
•
•
•
N-FET and NPN Driving Capability  
Ultra Fast Response Speed  
Output Voltages Default to 1.5V and 2.5V Yet  
Adjustable  
Linear Section — The two linear regulator controllers  
feature wide control bandwidth, N-FET and NPN  
transistor driving capability, and an adjustable output  
voltage. The wide control bandwidth makes meeting  
fast load transient response requirement such as that  
of the GTL+ bus an easy job. In minimum  
configuration, the two controllers default to 1.5V and  
2.5V respectively.  
APPLICATIONS  
•
Embedded Power Supplies for PC  
Motherboards  
•
•
Triple DC/DC Power Supplies  
Programmable High Current DC/DC Power  
Supply  
Both linear controllers have under voltage latch-off.  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
2
3
4
M II is a trademark of Cyrix Corporation.  
Pentium is a trademark of Intel Corporation.  
All other trademarks are the property of their respective owners.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2004, Texas Instruments Incorporated  
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LM2639M/NOPB TI

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