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LM2636MTC/NOPB PDF预览

LM2636MTC/NOPB

更新时间： 2024-09-08 14:52:27
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
19页 528K
描述
SWITCHING CONTROLLER, 2000kHz SWITCHING FREQ-MAX, PDSO20, PLASTIC, TSSOP-20

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中文翻译

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LM2636MTC/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：TSSOP
包装说明：TSSOP,针数：20
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01Factory Lead Time：1 week
风险等级：5.2Is Samacsys：N
模拟集成电路 - 其他类型：SWITCHING CONTROLLER控制模式：VOLTAGE-MODE
控制技术：PULSE WIDTH MODULATION最大输入电压：5.5 V
最小输入电压：4.5 V标称输入电压：5 V
JESD-30 代码：R-PDSO-G20JESD-609代码：e3
长度：6.5 mm湿度敏感等级：1
功能数量：1端子数量：20
最高工作温度：70 °C最低工作温度：
封装主体材料：PLASTIC/EPOXY封装代码：TSSOP
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表面贴装：YES
切换器配置：PUSH-PULL最大切换频率：2000 kHz
技术：BICMOS温度等级：COMMERCIAL
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 mm
Base Number Matches：1

LM2636MTC/NOPB 数据手册

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OBSOLETE  
LM2636  
www.ti.com  
SNVS024D –OCTOBER 1999–REVISED APRIL 2013  
LM2636 5-Bit Programmable Synchronous Buck Regulator Controller  
Check for Samples: LM2636  
1
FEATURES  
DESCRIPTION  
The LM2636 is a high speed controller designed  
specifically for use in synchronous DC/DC buck  
converters for advance d microprocessors. A 5-bit  
DAC accepts the VID code directly from the CPU and  
adjusts the output voltage from 1.3V to 3.5V. It  
provides the power good, over-voltage protection,  
and output enable features as required by Intel VRM  
specifications. Current limiting is achieved by  
monitoring the voltage drop across the rDS_ON of the  
high side MOSFET, which eliminates an expensive  
current sense resistor.  
23  
•
1.3V to 3.5V 5-Bit Programmable Output  
Voltage  
•
•
•
•
Synchronous Rectification  
Power Good Flag and Output Enable  
Over-Voltage Protection  
Initial Output Accuracy: 1.5% Over  
Temperature  
•
•
Current Limit without External Sense Resistor  
Adaptive Non-Overlapping MOSFET Gate  
Drives  
The LM2636 employs a fixed-frequency voltage mode  
PWM architecture. To provide a faster response to a  
large and fast load transient, two ultra-fast  
comparators are built in to monitor the output voltage  
and override the primary control loop when  
necessary. The PWM frequency is adjustable from 50  
kHz to 1 MHz through an external resistor. The wide  
range of PWM frequency gives the power supply  
designer the flexibility to make trade-offs between  
load transient response performance, MOSFET cost  
and the overall efficiency. The adaptive non-  
overlapping MOSFET gate drivers help avoid any  
potential shoot-through problem while maintaining  
high efficiency. BiCMOS gate drivers with rail-to-rail  
swing ensure that no spurious turn-on occur. When  
only 5V is available, a bootstrap structure can be  
employed to accommodate an NMOS high side  
switch. The precision reference trimmed to 2.5% over  
temperature is available externally for use by other  
regulators. Dynamic positioning of load voltage, which  
helps cut the number of output capacitors, can also  
be implemented easily.  
•
Adjustable Switching Frequency: 50 kHz to  
1 MHz  
•
•
•
Dynamic Output Voltage Positioning  
1.256V Reference Voltage Available Externally  
Plastic SOIC-20 Package and TSSOP-20  
Package  
APPLICATIONS  
•
Motherboard Power Supply/VRM for Cyrix  
Gxm, Cyrix Gxi, Cyrix MII, Pentium II, Pentium  
Pro, 6x86 and K6 Processors  
•
5V to 1.3V–3.5V High Current Power Supplies  
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
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 © 1999–2013, Texas Instruments Incorporated  
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