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SC1477ITSTRT PDF预览

SC1477ITSTRT

更新时间: 2024-11-21 20:10:47
品牌 Logo 应用领域
商升特 - SEMTECH 开关光电二极管
页数 文件大小 规格书
28页 686K
描述
Switching Controller, 2A, PDSO24, TSSOP-24

SC1477ITSTRT 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:24
Reach Compliance Code:unknownECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.84
模拟集成电路 - 其他类型:SWITCHING CONTROLLER控制技术:HYSTERETIC CURRENT MODE
最大输入电压:6 V最小输入电压:4.3 V
标称输入电压:5 VJESD-30 代码:R-PDSO-G24
JESD-609代码:e3长度:7.8 mm
功能数量:1端子数量:24
最高工作温度:85 °C最低工作温度:-40 °C
最大输出电流:2 A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):NOT SPECIFIED
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
温度等级:INDUSTRIAL端子面层:MATTE TIN
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:NOT SPECIFIED
宽度:4.4 mmBase Number Matches:1

SC1477ITSTRT 数据手册

 浏览型号SC1477ITSTRT的Datasheet PDF文件第2页浏览型号SC1477ITSTRT的Datasheet PDF文件第3页浏览型号SC1477ITSTRT的Datasheet PDF文件第4页浏览型号SC1477ITSTRT的Datasheet PDF文件第5页浏览型号SC1477ITSTRT的Datasheet PDF文件第6页浏览型号SC1477ITSTRT的Datasheet PDF文件第7页 
SC1477  
ADVANCED CPU  
POWER SUPPLY  
POWER MANAGEMENT  
Description  
Features  
u Complete single-chip Vcore solution  
u 5-bit VID code (0.925V to 2.0V)  
TheSC1477isasinglechiphigh-performanceHysteretic  
controller. With its integrated Smart™ Driver, it powers AMD  
Duron and Transmeta CPUs, directly supporting on-the-fly VID  
changesrequiredbytheseprocessors.TheSC1477eliminates  
an external multiplexer by allowing the output voltage for start-  
up (and sleep mode) to be set with an external resistor. The  
SC1477alsoincorporatesautomatic“power-save”toprevent  
negative current flow in the low-side FET during light loading  
conditions.  
u 1% output accuracy  
u Support continuous VID changes required for AMD Power  
Now TM and Transmeta LongRunTMoperation  
u High efficiency over a wide operating range  
u Fast transient response  
u High-speed gate drive capable of driving multiple MOSFETs  
(4Adrive current)  
u PWRGD with blanking during VID changes  
u Precision current sense and Over-current protection  
u Over-voltage and over-temperature shutdown  
A 5-bit DAC, accurate to 1%, sets the output voltage reference  
and implements the 0.925V to 2.00V range required by the  
processor. The hysteretic converter uses a comparator without  
an error amplifier, and therefore provides the fastest possible  
transient response, while avoiding the stability issues inherent  
to classical PWM controllers.  
Applications  
u
Notebook Computer CPUs  
u Internet appliances  
u Network server power supplies  
TheSC1477operatesfrom5Vdcandalsofeaturessoft-start,an  
open-drain PWRGD signal with blanking, and an enable input.  
ProgrammablecurrentlimitingshutstheSC1477downafter32  
current limit pulses. It is available in a space saving TSSOP-24  
package.  
u Power PC CPUs  
Conceptual Application Circuit  
Vin = 4.5V to 28V  
VCCA  
V5  
VCC  
DH  
L1  
Rs  
HYS  
EN  
BST  
Co  
LX  
SVO  
SS  
DL  
CMP/CL  
CORE  
Dynamic  
VID[0:4]  
AGND  
VID Switching  
PW RGD  
PGND  
SC1477  
Revision 5, Feb 2002  
1
www.semtech.com  

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