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LTC4253ACGN-ADJ#TRPBF PDF预览

LTC4253ACGN-ADJ#TRPBF

更新时间： 2024-11-28 13:09:51
品牌 Logo 应用领域
凌特 - Linear 控制器
页数 文件大小 规格书
32页 338K
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#TRPBF 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#TRPBF 数据手册

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LTC4253  
–48V Hot Swap Controller  
with Sequencer  
U
DESCRIPTIO  
FEATURES  
The LTC®4253 negative voltage Hot SwapTM controller  
allows a board to be safely inserted and removed from a  
livebackplane.Outputcurrentiscontrolledbythreestages  
of current-limiting: a timed circuit breaker, active current  
limiting and a fast feedforward path that limits peak  
current under worst-case catastrophic fault conditions.  
The LTC4253 latches off after a circuit fault.  
■
Allows Safe Board Insertion and Removal from a  
Live –48V Backplane  
■
Floating Topology Permits Very High Voltage  
Operation  
■
Programmable Analog Current Limit with Breaker  
Timer Ideal for Two Battery Feeds  
■
Fast Response Time Limits Peak Fault Current  
■
Latchoff After Fault  
Programmable undervoltage and overvoltage detectors  
disconnect the load whenever the input supply exceeds  
the desired operating range. The LTC4253’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  
MOSFET within safe operating area (SOA). A program-  
mablesoft-startcircuitcontrolsMOSFETinrushcurrentat  
start-up.  
■
Three Sequenced Power Good Outputs  
■
Programmable Soft-Start Current Limit  
■
Programmable Timer with Drain Voltage  
Accelerated Response  
■
Programmable Undervoltage/Overvoltage Protection  
U
APPLICATIO S  
■
Hot Board Insertion  
■
Electronic Circuit Breaker  
■
–48V Distributed Power Systems  
Three power good outputs are sequenced by a program-  
mable timer to enable external power modules at start-up  
or disable them if the circuit breaker trips. The LTC4253 is  
available in 16-pin SSOP.  
■
Negative Power Supply Control  
■
Central Office Switching  
■
Programmable Current Limiting Circuit  
■
High Availability Servers  
Disk Arrays  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
Hot Swap is a trademark of Linear Technology Corporation.  
■
U
TYPICAL APPLICATIO  
–48V/2.5A Hot Swap Controller  
–48V RTN  
(LONG PIN)  
R
IN  
+
C2  
100µF  
2.8k  
V
IN  
16k(1/4W)/6  
POWER  
MODULE 1  
C3  
0.1µF  
R3  
5.6k  
R4  
5.6k  
R5  
5.6k  
C
POWER  
MODULE 2  
IN  
1µF  
EN  
POWER  
MODULE 3  
–48V RTN  
(SHORT PIN)  
EN  
EN  
4
V
†
†
†
R1  
402k  
1%  
IN  
LTC4253  
PWRGD1  
11  
12  
5
3
OV  
UV  
2
PWRGD2  
PWRGD3  
EN3  
POWER  
MODULE 2  
OUTPUT  
16  
15  
1
RESET  
RESET  
EN3  
C1 10nF  
68nF  
EN2  
R2  
32.4k  
1%  
EN2  
V
†
R7  
C
IN  
SS  
R
1M  
D
6
14  
13  
10  
9
SS  
DRAIN  
GATE  
POWER  
MODULE 1  
OUTPUT  
Q1  
R6  
V
†
SQTIMER  
IN  
IRF530S  
7
B3100*  
C
SQ  
0.1µF  
TIMER  
V
SENSE  
R
10Ω  
C
–48V A  
EE  
R
S
0.02Ω  
C
8
C
C
18nF  
T
(LONG PINS)  
B3100*  
0.33µF  
*DIODES, INC.  
†
4253 TA01  
MOC207  
–48V B  
4253f  
1
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