参数资料
型号: LTC1421ISW
厂商: Linear Technology
文件页数: 14/24页
文件大小: 329K
描述: IC CONTROLLER HOT SWAP 24-SOIC
标准包装: 32
类型: 热交换控制器
应用: 通用
内部开关:
电源电压: 3 V ~ 12 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 24-SOIC(0.295",7.50mm 宽)
供应商设备封装: 24-SOIC
包装: 管件
14
LTC1421/LTC1421-2.5
APPLICATIONS INFORMATION
U
U
U
When CON1 and CON2 are both forced to ground for more
than 20ms, the LTC1421 assumes that the board is fully
connected to the host and power-up can begin. When
V
CCLO
 and V
CCHI
 exceed the 2.45V undervoltage lockout
threshold, the 20礎 current reference is connected from
RAMP to GND, the charge pumps are turned on and CPON
is forced high (time point 4). V
OUTHI
 and V
OUTLO
 begin to
ramp up. When V
OUTLO
 exceeds the reset threshold volt-
age, PWRGD will immediately be forced high (time point
5). After a 200ms delay, RESET will be pulled high and
DISABLE will be pulled low, enabling the data bus (time
point 6).
Ground Sense Comparator
When POR is pulled low for more than 20ms, GATELO and
GATEHI are pulled to ground and V
OUTLO
 and V
OUTHI
 will
be discharged. If POR is pulled back high while V
OUTLO
and V
OUTHI
 are still ramping down, the discharge will
continue. When they drop below the V
TRIP
 point, a power-
up sequence will begin automatically. The trip point poten-
tial for LTC1421 is set at 0.1V and 2.5V for LTC1421-2.5.
In applications, where either V
OUTLO
 or V
OUTHI
 might be
forced above 100mV before power-up, the LTC1421-2.5
should be used. This could occur when leakage through
the body diode of the logic chips keeps V
OUTLO
 high or in
the case where logic lines are precharged.
In other applications, where outputs need to drop to near
ground potential before ramping up again to ensure proper
initial state for the logic chips, the LTC1421 should be
used.
Power-On Reset Timing
The POR input is used to completely cycle the power
supplies on the board or to reset the electronic circuit
breaker feature. The POR pin can be connected to a
grounded push button, toggle switch or a logic signal
from the host. When POR is pulled low for more than
20ms, a power-on reset sequence begins (Figure 15,
Figure 15. Power-On Reset Timing
V
CCHI
1
2
3
4
5
6
7
V
CCLO
DISABLE
FAULT
POR
CON1
CON2
V
OUTLO
V
OUTHI
CPON
V
TH2
1421 F15
V
TH1
20ms
200ms
32祍
GATEHI
GATELO
RESET
PWRGD
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相关代理商/技术参数
参数描述
LTC1421ISW#PBF 功能描述:IC CONTROLLER HOT SWAP 24-SOIC 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)
LTC1421ISW#TR 功能描述:IC CONTROLLER HOTSWAP ADJ 24SOIC 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)
LTC1421ISW#TRPBF 功能描述:IC CONTROLLER HOT SWAP 24-SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:100 系列:- 类型:热插拔开关 应用:通用 内部开关:是 电流限制:可调 电源电压:9 V ~ 13.2 V 工作温度:-40°C ~ 150°C 安装类型:表面贴装 封装/外壳:10-WFDFN 裸露焊盘 供应商设备封装:10-TDFN-EP(3x3) 包装:管件
LTC1421ISW-2.5 功能描述:IC CONTROLLER HOT SWAP 24-SOIC 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)
LTC1421ISW-2.5#PBF 功能描述:IC CONTROLLER HOT SWAP 24-SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:100 系列:- 类型:热插拔开关 应用:通用 内部开关:是 电流限制:可调 电源电压:9 V ~ 13.2 V 工作温度:-40°C ~ 150°C 安装类型:表面贴装 封装/外壳:10-WFDFN 裸露焊盘 供应商设备封装:10-TDFN-EP(3x3) 包装:管件