6
LTC1643AL
LTC1643AL-1/LTC1643AH
 1643afb
TYPICAL PERFORMANCE CHARACTERISTICS
W
V
EE
 Current Foldback
vs Temperature
I
SINK
 (mA)
0
6
10
  1643A G27
2
4
8
800
700
600
500
400
300
200
100
0
FAULT
PWRGD
V
OL
 vs I
SINK
 (25?/SPAN>C)
TIMER (Pin 4): Analog Current Fault Inhibit Timing Input.
Connect a capacitor from TIMER to GND. With the chip
turned off (ON = GND or ON = High) or the internal circuit
breaker tripped (FAULT = GND), the TIMER pin is internally
held at GND. When the chip is turned on, a 22礎 pull-up
current source is connected to TIMER. Current limit faults
will be ignored until the voltage at the TIMER pin rises to
within 0.9V of 12V
IN
.
ON/ON (Pin 5): Digital Input.The LTC1643AL/LTC1643AL-1
have an active low enable, ON, and the LTC1643AH has an
active high enable, ON. When the ON pin is pulled high or
PIN FUNCTIONS
U
U
12V
IN
 (Pin 1): 12V Supply Input. It powers all the chips
internal circuitry. A 0.5& switch is connected between
12V
IN
 and 12V
OUT
 with a foldback current limit. An under-
voltage lockout circuit prevents the switches from turning
on while the 12V
IN
 pin voltage is less than 9.5V typically.
V
EEIN
  (Pin 2):    12V  Supply  Input.  A  1.2&  switch  is
connected between V
EEIN
  and V
EEOUT
  with a foldback
current limit.
3V
OUT
 (Pin 3): Analog Input. Used to monitor the 3.3V
output supply voltage. The PWRGD signal cannot go low
until the 3V
OUT
 pin exceeds 2.9V typically.
TEMPERATURE (癈)
70
60
50
40
30
20
10
0
1  4  A   24
50
25
75
25    0
50
100   125
3V
OUT
 = 3.3V
3V
OUT
 = 0V
3V
IN
 Foldback Current Limit
Voltage vs Temperature
TEMPERATURE (癈)
50
2.454
2.452
2.450
2.448
2.446
2.444
2.442
25
75
1643A G21
25    0
50
100   125
3V
IN
 Undervoltage Lockout
vs Temperature
TEMPERATURE (癈)
70
60
50
40
30
20
10
0
1643A G23
50
25
75
25    0
50
100   125
5V
OUT
 = 5V
5V
OUT
 = 0V
5V
IN
 Foldback Current Limit
Voltage vs Temperature
12V
 
Current Foldback
vs Temperature
TEMPERATURE (癈)
50
1200
1000
800
600
400
200
0
25
75
1643A G26
25
0
50
100
12V
OUT
 = 12V
12V
OUT
 = 0V
TEMPERATURE (癈)
50
600
500
400
300
200
100
0
25
75
1643A G25
25
0
50
100
V
EEOUT
 = 12V
V
EEOUT
 = 0V
相关PDF资料
LTC1644CGN#TRPBF IC CONTROLLER HOT SWAP 20-SSOP
LTC1645IS#TRPBF IC CTRLR SEQ HOTSWAP DUAL 14SOIC
LTC1646IGN#TR IC CNTRLR HOTSWAP PCIDUAL 16SSOP
LTC1647-1IS8#TRPBF IC CONTROLLR HOTSWAP DUAL 8-SOIC
LTC1704EGN#TRPBF IC REG DL BUCK/LINEAR 16SSOP
LTC1966MPMS8#TRPBF IC RMS/DC CONV MICROPWR 8-MSOP
LTC1967IMS8#TRPBF IC CONVERTER RMS-DC PREC 8MSOP
LTC1968IMS8#TRPBF IC CONVERTER RMS-DC PREC 8MSOP
相关代理商/技术参数
LTC1643AL-1CGN#TR 功能描述:IC CTRLR HOTSWAP PCI BUS 16SSOP 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)
LTC1643AL-1CGN#TRPBF 功能描述:IC CTRLR HOTSWAP PCI BUS 16SSOP 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)
LTC1643AL-1IGN 功能描述:IC CTRLR HOTSWAP PCI BUS 16SSOP 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)
LTC1643AL-1IGN#PBF 功能描述:IC CTRLR HOTSWAP PCI BUS 16SSOP 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)
LTC1643AL-1IGN#TR 功能描述:IC CTRLR HOTSWAP PCI BUS 16SSOP 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)
LTC1643AL-1IGN#TRPBF 功能描述:IC CTRLR HOTSWAP PCI BUS 16SSOP 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)
LTC1643AL-1IGNPBF 制造商:Linear Technology 功能描述:PCI-Bus Hot Swap Controller, LTC1643AL
LTC1643ALCGN 功能描述:IC CTRLR HOTSWAP PCIBUS 16-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)