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LTC4252CCMS-2#TRPBF

产品描述Hot Swap Voltage Controllers Negative Voltage Hot Swap Controllers
产品类别电源/电源管理    电源电路   
文件大小452KB,共36页
制造商ADI(亚德诺半导体)
官网地址https://www.analog.com
标准
下载文档 详细参数 全文预览

LTC4252CCMS-2#TRPBF概述

Hot Swap Voltage Controllers Negative Voltage Hot Swap Controllers

LTC4252CCMS-2#TRPBF规格参数

参数名称属性值
Brand NameAnalog Devices Inc
是否无铅含铅
是否Rohs认证符合
厂商名称ADI(亚德诺半导体)
包装说明TSSOP,
针数10
制造商包装代码05-08-1661
Reach Compliance Codecompliant
可调阈值YES
模拟集成电路 - 其他类型POWER SUPPLY SUPPORT CIRCUIT
JESD-30 代码S-PDSO-G10
JESD-609代码e3
长度3 mm
信道数量2
功能数量1
端子数量10
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SQUARE
封装形式SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度(摄氏度)NOT SPECIFIED
座面最大高度1.1 mm
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
端子形式GULL WING
端子节距0.5 mm
端子位置DUAL
处于峰值回流温度下的最长时间NOT SPECIFIED
宽度3 mm

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LTC4252B-1/LTC4252B-2
LTC4252C-1/LTC4252C-2
Negative Voltage
Hot Swap Controllers
FEATURES
n
n
n
n
n
n
DESCRIPTION
The LTC
®
4252 negative voltage Hot Swap
TM
controller
allows a board to be safely inserted and removed from a
live backplane. Output current is controlled by three 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 conditions.
Adjustable undervoltage and overvoltage detectors dis-
connect the load whenever the input supply exceeds the
desired operating range. The LTC4252’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 is accelerated by sensing
excessive MOSFET drain voltage, keeping the MOSFET
within its safe operating area (SOA). An adjustable soft-
start circuit controls MOSFET inrush current at start-up.
The LTC4252-2 provides automatic retry after a fault. The
LTC4252C-1/LTC4252C-2 feature tight ±1% undervoltage/
overvoltage threshold accuracy. The LTC4252 is available
in either an 8-pin or 10-pin MSOP.
The LTC4252B and LTC4252C improve the ruggedness
of the shunt regulator in the LTC4252 and LTC4252A.
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.
n
n
Allows Safe Board Insertion and Removal from a
Live – 48V Backplane
Floating Topology Permits Very High Voltage Operation
Current Limit With Circuit Breaker Timer
Fast Response Time Limits Peak Fault Current
Programmable Soft-Start Current Limit
Programmable Timer with Drain Voltage
Accelerated Response
±1% Undervoltage/Overvoltage Threshold (LTC4252C)
Improved Ruggedness Shunt Regulator
Adjustable Undervoltage/Overvoltage Protection
LTC4252B-1/LTC4252C-1: Latch Off After Fault
LTC4252B-2/LTC4252C-2: Automatic Retry After Fault
Available in 8-Pin and 10-Pin MSOP Packages
APPLICATIONS
n
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Hot Board Insertion
Electronic Circuit Breaker
– 48V Distributed Power Systems
Negative Power Supply Control
Central Office Switching
High Availability Servers
ATCA
TYPICAL APPLICATION
–48V/2.5A Hot Swap Controller
–48RTN
R
IN
3× 1.8k IN SERIES
1/4W EACH
D
IN
DDZ13B
**
Start-Up Behavior
+
R3
5.1k
*
C
L
100µF
LOAD
EN
V
OUT
GATE
5V/DIV
–48RTN
(SHORT PIN)
C
IN
1µF
V
IN
LTC4252B-1
OV
UV
TIMER
PWRGD
DRAIN
GATE
V
EE
SENSE
R1
402k
1%
SENSE
2.5A/DIV
R
D
1M
Q1
IRF530S
R
C
10
C
C
18nF
R
S
0.02
V
OUT
20V/DIV
R2
32.4k
1%
C1
10nF
C
T
0.33µF
SS
C
SS
68nF
PWRGD
10V/DIV
1ms/DIV
4252B12 TA01a
–48V
4252B12 TA01
* M0C207
**DIODES, INC
RECOMMENDED FOR HARSH ENVIRONMENTS
4252b12f
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