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LTC4253ACGN-ADJ#PBF PDF预览

LTC4253ACGN-ADJ#PBF

更新时间： 2024-09-17 18:29:27
品牌 Logo 应用领域
凌特 - Linear 光电二极管
页数 文件大小 规格书
34页 378K
描述
IC 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO20, 0.150 INCH, LEAD FREE, PLASTIC, SSOP-20, Power Management Circuit

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LTC4253ACGN-ADJ#PBF 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：SSOP
包装说明：SSOP, SSOP20,.25针数：20
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.68
可调阈值：YES模拟集成电路 - 其他类型：POWER SUPPLY SUPPORT CIRCUIT
JESD-30 代码：R-PDSO-G20JESD-609代码：e3
长度：8.649 mm湿度敏感等级：1
信道数量：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：SSOP封装等效代码：SSOP20,.25
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, SHRINK PITCH
峰值回流温度（摄氏度）：250认证状态：Not Qualified
座面最大高度：1.75 mm子类别：Power Management Circuits
最大供电电流 (Isup)：2 mA表面贴装：YES
技术：CMOS温度等级：COMMERCIAL
端子面层：Matte Tin (Sn)端子形式：GULL WING
端子节距：0.635 mm端子位置：DUAL
处于峰值回流温度下的最长时间：40宽度：3.899 mm
Base Number Matches：1

LTC4253ACGN-ADJ#PBF 数据手册

 浏览型号LTC4253ACGN-ADJ#PBF的Datasheet PDF文件第2页浏览型号LTC4253ACGN-ADJ#PBF的Datasheet PDF文件第3页浏览型号LTC4253ACGN-ADJ#PBF的Datasheet PDF文件第4页浏览型号LTC4253ACGN-ADJ#PBF的Datasheet PDF文件第5页浏览型号LTC4253ACGN-ADJ#PBF的Datasheet PDF文件第6页浏览型号LTC4253ACGN-ADJ#PBF的Datasheet PDF文件第7页 
LTC4253/LTC4253A  
–48V Hot Swap Controllers  
with Sequencer  
FEATURES  
DESCRIPTION  
The LTC®4253/LTC4253A negative voltage Hot Swap™  
controllersallowaboardtobesafelyinsertedandremoved  
fromalivebackplane.Outputcurrentiscontrolledbythree  
stages of current-limiting: a timed circuit breaker, active  
current limiting and a fast feedforward path that limits  
peak current under worst-case catastrophic fault condi-  
tions. The LTC4253/LTC4253A latch off after a circuit fault.  
n
Allows Safe Board Insertion and Removal from a  
Live –48V Backplane  
n
Floating Topology Permits Very High Voltage  
Operation  
n
Adjustable Analog Current Limit with Breaker Timer  
Ideal for Two Battery Feeds  
n
Fast Response Time Limits Peak Fault Current  
n
Adjustable Undervoltage/Overvoltage Protection  
Adjustable undervoltage and overvoltage detectors dis-  
connect the load whenever the input supply exceeds the  
desired operating range. The LTC4253/LTC4253A’s supply  
input is shunt-regulated, allowing safe operation with very  
high supply voltages. A multifunction timer delays initial  
start-up and controls the circuit breaker’s response time.  
The circuit breaker’s response time can be accelerated  
by sensing excessive MOSFET drain voltage, keeping the  
MOSFETwithinitssafeoperatingarea(SOA).Anadjustable  
soft-startcircuitcontrolsMOSFETinrushcurrentatstart-up.  
with ±±1 Threshold Accuracy ꢀLTC4253A)  
n
Three Sequenced Power Good Outputs  
n
Adjustable Soft-Start Current Limit  
n
Adjustable Timer with Drain Voltage Accelerated  
Response  
Latchoff After Fault  
Available in a ±6-Pin SSOP Package  
n
n
APPLICATIONS  
n
–48V Distributed Power Systems  
Threepowergoodoutputsaresequencedbyanadjustable  
timer and two ENABLE inputs to enable external power  
modules at start-up or disable them if the circuit breaker  
trips. The LTC4253A features tight ±±1 undervoltage/  
overvoltage threshold accuracy. The LTC4253/LTC4253A  
are available in a ±6-pin SSOP.  
n
Negative Power Supply Control  
n
Central Office Switching  
n
High Availability Servers  
n
Disk Arrays  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and Hot  
Swap is a trademark of Linear Technology Corporation. All other trademarks are the property of  
their respective owners.  
TYPICAL APPLICATION  
–48V/2.5A Hot Swap Controller  
–48V RTN  
Start-Up Behavior  
2.5k  
15k(1/4W)/6  
+
V
1µF  
IN  
LOAD1  
100µF  
5.6k  
–48V RTN  
LOAD2  
EN  
5.6k  
5.6k  
GATE  
10V  
402k  
1%  
EN3  
LTC4253  
EN2  
V
IN  
10nF  
LOAD3  
EN  
EN  
††  
D
IN  
DDZ13B*  
RESET  
SS  
1V  
†
†
†
UV  
PWRGD1  
PWRGD2  
PWRGD3  
4253 TA01  
SENSE  
50mV  
OV  
SS  
32.4k  
1%  
68nF  
DRAIN  
0.1µF  
SQTIMER  
1M  
*DIODES, INC.  
IRF530S  
V
GATE  
OUT  
†
B3100*  
B3100*  
MOC207  
0.33µF  
50V  
–48V A  
–48V B  
††  
TIMER  
V
SENSE  
RECOMMENDED FOR HARSH ENVIRONMENTS.  
10Ω  
EE  
4253 TA01b  
1ms/DIV  
0.02Ω  
18nF  
425353aff  
1
For more information www.linear.com/4253  
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