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参数资料
| 型号： | LTC1643LCGN#TR |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 电源管理 |
| 英文描述： | 4-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16 |
| 封装： | 0.150 INCH, PLASTIC, SSOP-16 |
| 文件页数： | 13/16页 |
| 文件大小： | 278K |
| 代理商： | LTC1643LCGN#TR |
6
LTC1643L/LTC1643L-1/LTC1643H
TYPICAL PERFORMANCE CHARACTERISTICS
UW
VEE Current Foldback
vs Temperature
ISINK (mA)
0
V
OL
(mV)
6
10
1643 G27
24
8
800
700
600
500
400
300
200
100
0
FAULT
PWRGD
VOL vs ISINK (25°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 20
A 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 12VIN.
ON/ON (Pin 5): Digital Input.The LTC1643L/LTC1643L-1
have an active low enable, ON, and the LTC1643H has an
active high enable, ON. When the ON pin is pulled high or
PIN FUNCTIONS
UU
U
12VIN (Pin 1): 12V Supply Input. It powers all the chip’s
internal circuitry. A 0.5
switch is connected between
12VIN and 12VOUT with a foldback current limit. An
undervoltage lockout circuit prevents the switches from
turning on while the 12VIN pin voltage is less than 9.5V
typically.
VEEIN (Pin 2): – 12V Supply Input. A 1.2 switch is
connected between VEEIN and VEEOUT with a foldback
current limit.
3VOUT (Pin 3): Analog Input. Used to monitor the 3.3V
output supply voltage. The PWRGD signal cannot go high
until the 3VOUT pin exceeds 2.9V typically.
TEMPERATURE (
°C)
70
60
50
40
30
20
10
0
LT1643 G24
FOLDBACK
CURRENT
LIMIT
VOLTAGE
(mV)
–50
25
75
–25
0
50
100
125
3VOUT = 3.3V
3VOUT = 0V
3VIN Foldback Current Limit
Voltage vs Temperature
TEMPERATURE (
°C)
–50
UNDERVOLTAGE
LOCKOUT
(V)
2.454
2.452
2.450
2.448
2.446
2.444
2.442
25
75
1643 G21
–25
0
50
100
125
3VIN Undervoltage Lockout
vs Temperature
TEMPERATURE (
°C)
–50
CURRENT
FOLDBACK
(mA)
600
500
400
300
200
100
0
25
75
1643 G25
–25
0
50
100
VEEOUT = –12V
VEEOUT = 0V
TEMPERATURE (
°C)
70
60
50
40
30
20
10
0
LT1643 G23
FOLDBACK
CURRENT
LIMIT
VOLTAGE
(mV)
–50
25
75
–25
0
50
100
125
5VOUT = 5V
5VOUT = 0V
5VIN Foldback Current Limit
Voltage vs Temperature
12V Current Foldback
vs Temperature
TEMPERATURE (
°C)
–50
CURRENT
FOLDBACK
(mA)
1200
1000
800
600
400
200
0
25
75
1643 G26
–25
0
50
100
12VOUT = 12V
12VOUT = 0V
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相关代理商/技术参数 |
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| LTC1644CGN | 功能描述:IC CONTROLLER HOT SWAP 20-SSOP RoHS:否 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 |
| LTC1644CGN#PBF | 功能描述:IC CONTROLLER HOT SWAP 20-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) |
| LTC1644CGN#TR | 功能描述:IC CONTROLLER HOT SWAP 20-SSOP RoHS:否 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 |
| LTC1644CGN#TRPBF | 功能描述:IC CONTROLLER HOT SWAP 20-SSOP 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 |
| LTC1644IGN | 功能描述:IC CONTROLLER HOT SWAP 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) |
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