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LTC4251BCS6-1#TRMPBF PDF预览

LTC4251BCS6-1#TRMPBF

更新时间： 2024-11-07 14:52:47
品牌 Logo 应用领域
凌特 - Linear 光电二极管
页数 文件大小 规格书
24页 216K
描述
LTC4251B - Negative Voltage Hot Swap Controllers in SOT-23; Package: SOT; Pins: 6; Temperature Range: 0°C to 70°C

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LTC4251BCS6-1#TRMPBF 技术参数

是否Rohs认证： 符合生命周期：Transferred
零件包装代码：SOT包装说明：VSSOP, TSOP6,.11,37
针数：6Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：2.81可调阈值：YES
模拟集成电路 - 其他类型：POWER SUPPLY SUPPORT CIRCUITJESD-30 代码：R-PDSO-G6
JESD-609代码：e3长度：2.9 mm
湿度敏感等级：1信道数量：1
功能数量：1端子数量：6
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：VSSOP
封装等效代码：TSOP6,.11,37封装形状：RECTANGULAR
封装形式：SMALL OUTLINE, VERY 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 mm
子类别：Power Management Circuits最大供电电流 (Isup)：2 mA
最大供电电压 (Vsup)：14.5 V最小供电电压 (Vsup)：11.5 V
标称供电电压 (Vsup)：13 V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：0.95 mm端子位置：DUAL
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：1.625 mm
Base Number Matches：1

LTC4251BCS6-1#TRMPBF 数据手册

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LTC4251B/LTC4251B-1/  
LTC4251B-2  
Negative Voltage  
Hot Swap Controllers in SOT-23  
FEATURES  
DESCRIPTION  
TheLTC®4251B/LTC4251B-1/LTC4251B-2negativevoltage  
Hot Swap™ controllers allow a board to be safely inserted  
and removed from a live backplane. Output current is con-  
trolled by three stages of current limiting: a timed circuit  
breaker, activecurrentlimitingandafastfeedforwardpath  
that limits peak current under worst-case catastrophic  
fault conditions.  
n
Allows Safe Board Insertion and Removal from a  
Live –48V Backplane  
n
Floating Topology Permits Very High Voltage  
Operation  
n
Programmable Analog Current Limit with Circuit  
Breaker Timer  
n
Fast Response Time Limits Peak Fault Current  
n
Improved Ruggedness Shunt Regulator  
Programmable undervoltage and overvoltage detectors  
disconnect the load whenever the input supply exceeds  
the desired operating range. The 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.  
n
Programmable Timer  
n
Programmable Undervoltage/Overvoltage Protection  
n
Low Profile 6-Lead SOT-23 (ThinSOT™) Package  
APPLICATIONS  
The LTC4251B UV/OV thresholds are designed to match  
thestandardtelecomoperatingrangeof–43Vto–75V.The  
LTC4251B-1UV/OVthresholdsextendtheoperatingrange  
toencompass–36Vto–72V. TheLTC4251B-2implements  
a UV threshold of –43V only. The LTC4251B improves the  
ruggedness of the LTC4251 shunt regulator.  
n
Hot Board Insertion  
n
Electronic Circuit Breaker  
n
–48V Distributed Power Systems  
n
Negative Power Supply Control  
n
Central Office Switching  
n
Programmable Current Limiting Circuit  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and  
Hot Swap and ThinSOT are trademarks of Linear Technology Corporation. All other trademarks  
are the property of their respective owners.  
n
High Availability Servers  
Disk Arrays  
n
TYPICAL APPLICATION  
–48V, 2.5A Hot Swap Controller  
Start-Up Behavior  
–48RTN  
R
*
IN  
+
–48RTN  
(SHORT PIN)  
10k  
GATE  
5V/DIV  
C
L
LOAD  
500mW  
100μF  
R1  
402k  
1%  
V
OUT  
†
C
D
IN  
IN  
V
IN  
1μF  
DDZ13B**  
Q1  
IRF530S  
SENSE  
2.5A/DIV  
UV/OV GATE  
LTC4251B  
C1  
10nF  
3
4
TIMER SENSE  
1
R2  
32.4k  
1%  
R
10Ω  
C
R
V
V
S
EE  
OUT  
0.02Ω  
20V/DIV  
C
C
C
T
2
18nF  
150nF  
4251b12 TA01a  
–48V  
4251b12 TA01b  
1ms/DIV  
*TWO 0.25W RESISTORS IN SERIES FOR  
R
ON THE PCB ARE RECOMMENDED.  
IN  
**DIODES, INC.  
†RECOMMENDED FOR HARSH ENVIRONMENTS  
4251b12f  
1
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