收藏本站
LTC4242
17
4242f
V
CC
 Power Supply
The LTC4242 derives its power from V
CC
. A bypass capacitor
of 1礔 should be connected between this pin and ground.
If V
CC
 is derived from the input supplies of 3V
IN
 or AUXIN,
a lowpass  lter shown in Figure 11 should be used.
This RC network allows the LTC4242 to ride through a
3V
IN
/AUXIN short-circuit transient without collapsing
below the V
CC
 UVLO threshold. AUXIN or 3V
IN
 may have
narrow but high glitches due to parasitic inductance. Since
the absolute maximum rating for V
CC
 is 7V compared to
10V for AUXIN and 3V
IN
, the R
S
 and C1 values should be
chosen to damp the peak voltage seen by V
CC
 below 7V.
Figure 11. RC Network for V
CC
 Filtering
APPLICATIO  S I FOR  ATIO
U
U
U
3V
SENSE
3V
OUT
EN
BD_PRST
3.3V
R
AUTO
200k
C
AUTO
0.1礔
3V
IN
3V
GATE
Q2
Si7336ADP
R2
13m&
GND
LTC4242*
FAULT
*ADDITIONAL DETAILS OMITTED FOR CLARITY
ON
LOAD
4242 F09
1.235V
ON/FAULT
3V
IN
3V
GATE
3V
IN
 3V
SENSE
0.6V
V
OL
V
TH
V
CB
t
CB
t
OFF
4242 F10
Figure 9. Auto-Retry Application
Figure 10. Auto-Retry Timing
GATE Pin Voltage
The minimum gate drive voltage is 4.5V, therefore, logic
level N-channel MOSFETs should be used for the external
switches to maintain adequate gate enhancement. The
GATE pins are clamped at a typical value of 5.5V above
the respective OUT pins.
Compensating the Active Current Loop
The active current limit circuit is compensated using the
resistor R
G
 and the slew rate control capacitor C
G
. The value
of C
G
 is selected based on the inrush current allowed. The
R
G
 value should be experimentally determined. A suggested
value range for R
G
 is between 10?and 100?
C1
1
F
4242 F11
R
S
33
AUXIN
OR
3V
IN
V
CC
Force ON Operation
When the FON pin is pulled high and EN is low, the
LTC4242 operates in the diagnostic mode. All the input
supplies power switches are forced to turn on, regardless
of undervoltage conditions on the input supplies, status of
the ON pins and the fault latch. The contents in the fault
latch would be preserved during this time and no change
of state would occur after the part is con gured to operate
in the diagnostic mode. If the output current exceeds the
ECB threshold, FAULT/AUXFAULT is pulled low immedi-
ately, but does not latch. The undervoltage lockout on V
CC
 
turns off all the switches, regardless of the status of FON.
During thermal shutdown, the internal switch is shut off to
prevent overheating, even if FON is high. The main power
switches remain on as FON is high. Care must be taken to
ensure the outputs are not short circuited since there is
no current limit mechanism in diagnostic mode.
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
LTC4244CGN-1#TRPBF IC CTRLR HOTSWAP PCI 20-SSOP
LTC4245CG#TRPBF IC CNTRLR HOT SWAP 36-SSOP
LTC4251-2CS6#TRPBF IC CTRLR HOTSWAP NEGVOLT SOT23-6
LTC4252A-1IMS#TRPBF IC CNTRLR HOTSWAP NEGVOLT 10MSOP
LTC4253ACGN#TRPBF IC HOT SWAP CONTRLR -48V 16-SSOP
LTC4257CS8 IC CTRLR INTFACE PWR/ETHER 8SOIC
LTC4260IUH#PBF IC HOT SWAP CNTRL I2C 32-QFN
LTC4261IGN-2#PBF IC CTRLR HOTSWAP W/ADC 28-SSOP
相关代理商/技术参数
LTC4242IG 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Slot Hot Swap Controller for PCI Express
LTC4242IG#PBF 功能描述:IC CNTRLR HOT SWAP 36-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:119 系列:- 类型:热交换控制器 应用:通用型，PCI Express? 内部开关:无 电流限制:- 电源电压:3.3V，12V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:80-TQFP 供应商设备封装:80-TQFP（12x12） 包装:托盘 产品目录页面:1423 (CN2011-ZH PDF)
LTC4242IG#TRPBF 功能描述:IC CNTRLR HOT SWAP 36-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:119 系列:- 类型:热交换控制器 应用:通用型，PCI Express? 内部开关:无 电流限制:- 电源电压:3.3V，12V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:80-TQFP 供应商设备封装:80-TQFP（12x12） 包装:托盘 产品目录页面:1423 (CN2011-ZH PDF)
LTC4242IUHF 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Slot Hot Swap Controller for PCI Express
LTC4242IUHF#PBF 功能描述:IC CTRLR HOTSWAP DUAL-SLOT 38QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:119 系列:- 类型:热交换控制器 应用:通用型，PCI Express? 内部开关:无 电流限制:- 电源电压:3.3V，12V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:80-TQFP 供应商设备封装:80-TQFP（12x12） 包装:托盘 产品目录页面:1423 (CN2011-ZH PDF)
LTC4242IUHF#TRPBF 功能描述:IC CNTRLR HOT SWAP 38-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:119 系列:- 类型:热交换控制器 应用:通用型，PCI Express? 内部开关:无 电流限制:- 电源电压:3.3V，12V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:80-TQFP 供应商设备封装:80-TQFP（12x12） 包装:托盘 产品目录页面:1423 (CN2011-ZH PDF)
LTC4244 制造商:LINER 制造商全称:Linear Technology 功能描述:Rugged, CompactPCI Bus Hot Swap Controllers
LTC4244CGN 功能描述:IC CTRLR HOTSWAP PCI 20-SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:119 系列:- 类型:热交换控制器 应用:通用型，PCI Express? 内部开关:无 电流限制:- 电源电压:3.3V，12V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:80-TQFP 供应商设备封装:80-TQFP（12x12） 包装:托盘 产品目录页面:1423 (CN2011-ZH PDF)