參數(shù)資料
型號： LTC4245CG#TRPBF
廠商： Linear Technology
文件頁數(shù)： 9/36頁
文件大?。?/td> 431K
描述： IC CNTRLR HOT SWAP 36-SSOP
標準包裝： 1,000
類型： 熱交換控制器
應用： CompactPCI?
內部開關： 無
電源電壓： 3.3V，5V，12V
工作溫度： 0°C ~ 70°C
安裝類型： 表面貼裝
封裝/外殼： 36-SSOP（0.209"，5.30mm 寬）
供應商設備封裝： 36-SSOP
包裝： 帶卷 (TR)
LTC4245
9
4245fa
PI   FU CTIO S
U
U
12V
GATE
: Gate Drive for 12V Supply External N-Channel 
MOSFET. An internal 20糀 current source charges the gate
of the external N-channel MOSFET. An internal clamp limits
the gate voltage to 6.2V above 12V
OUT
. During turn-off a
1.3mA pull-down current discharges 12V
GATE
 to ground.
During short-circuit a 250mA pull-down current between
12V
GATE
 and 12V
OUT
 is activated.
12V
IN
: 12V Supply, Current Sense and ADC Input. The 
internal low voltage supply V
CC
 is generated from 12V
IN
.
An undervoltage lockout circuit, with 38mV hysteresis,
prevents any external MOSFET from turning on when this
pin is below 10.5V.
12V
OUT
: 12V Gate Drive Return; Foldback, ADC and Power 
Bad Input. Connect this pin to the source of the 12V supply
external N-channel MOSFET switch for gate drive return.
Power is considered bad if this pin drops below 11.1V. The
comparator on this pin has a built-in hysteresis of 40mV.
This pin is also an input to the ADC and the current limit
foldback circuit. A 1000?active pull-down discharges
12V
OUT
 to ground when the external MOSFET is turned
off.
12V
SENSE
: 12V Supply Current Sense and ADC Input. 
Connect this pin to the output of the 12V current sense
resistor. The current limit circuit controls the 12V
GATE
 pin
to limit the sense voltage between the 12V
IN
 and 12V
SENSE
 
pins to 50mV or less during start-up and 150mV thereafter.
During start-up a foldback feature reduces the current
limit to 15mV as the 12V
OUT
 pin approaches ground. A
circuit breaker, enabled after start-up, trips when the sense
voltage exceeds 50mV for 22約. To disable current limit,
connect this pin to 12V
IN
.
3V
GATE
: Gate Drive for 3.3V Supply External N-Channel 
MOSFET. An internal 20糀 current source charges the gate
of the external N-channel MOSFET. An internal clamp limits
the gate voltage to 6.2V above 3V
OUT
. During turn-off a
1.3mA pull-down current discharges 3V
GATE
 to ground.
During short-circuit a 310mA pull-down current between
3V
GATE
 and 3V
OUT
 is activated.
3V
IN
: 3.3V Supply, Current Sense and ADC Input. The 1V 
precharge circuit draws its power and reference voltage
from 3V
IN
. An undervoltage lockout circuit, with 10mV
hysteresis, prevents any external MOSFET from turning
on when this pin is below 2.8V.
3V
OUT
: 3.3V Gate Drive Return; Foldback, ADC and Power 
Bad Input. Connect this pin to the source of the 3.3V supply
external N-channel MOSFET switch for gate drive return.
Power is considered bad if this pin drops below 2.9V. The
comparator on this pin has a built-in hysteresis of 11mV.
This pin is also an input to the ADC and the current limit
foldback circuit. A 190?active pull-down discharges 3V
OUT
 
to ground when the external MOSFET is turned off.
3V
SENSE
:  3.3V  Supply  Current  Sense  and  ADC  Input. 
Connect this pin to the output of the 3.3V current sense
resistor. The current limit circuit controls the 3V
GATE
 pin
to limit the sense voltage between the 3V
IN
 and 3V
SENSE
 
pins to 25mV or less during start-up and 75mV thereafter.
During start-up a foldback feature reduces the current
limit to 7.5mV as the 3V
OUT
 pin approaches ground. A
circuit breaker, enabled after start-up, trips when the sense
voltage exceeds 25mV for 22約. To disable current limit,
connect this pin to 3V
IN
.
5V
GATE
: Gate Drive for 5V Supply External N-Channel MOS-
FET. An internal 20糀 current source charges the gate of
the external N-channel MOSFET. An internal clamp limits
the gate voltage to 6.2V above 5V
OUT
. During turn-off a
1.3mA pull-down current discharges 5V
GATE
 to ground.
During short-circuit a 250mA pull-down current between
5V
GATE
 and 5V
OUT
 is activated.
5V
IN
: 5V Supply, Current Sense and ADC Input. An under-
voltage lockout circuit, with 16mV or 10mV of hysteresis,
prevents any external MOSFET from turning on when this
pin is below 4.38V or 2.8V depending on the state of the
CFG pin.
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相關代理商/技術參數(shù)
參數(shù)描述
LTC4245CUHF 制造商:LINER 制造商全稱:Linear Technology 功能描述:Multiple Supply Hot Swap Controller with I2C Compatible Monitoring
LTC4245CUHF#PBF 功能描述:IC CNTRLR HOT SWAP 38-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:119 系列:- 類型:熱交換控制器 應用:通用型，PCI Express? 內部開關:無 電流限制:- 電源電壓:3.3V，12V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:80-TQFP 供應商設備封裝:80-TQFP（12x12） 包裝:托盤 產(chǎn)品目錄頁面:1423 (CN2011-ZH PDF)
LTC4245CUHF#TRPBF 功能描述:IC CNTRLR HOT SWAP 38-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:119 系列:- 類型:熱交換控制器 應用:通用型，PCI Express? 內部開關:無 電流限制:- 電源電壓:3.3V，12V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:80-TQFP 供應商設備封裝:80-TQFP（12x12） 包裝:托盤 產(chǎn)品目錄頁面:1423 (CN2011-ZH PDF)
LTC4245IG 制造商:LINER 制造商全稱:Linear Technology 功能描述:Multiple Supply Hot Swap Controller with I2C Compatible Monitoring
LTC4245IG#PBF 功能描述:IC CNTRLR HOT SWAP 36-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:119 系列:- 類型:熱交換控制器 應用:通用型，PCI Express? 內部開關:無 電流限制:- 電源電壓:3.3V，12V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:80-TQFP 供應商設備封裝:80-TQFP（12x12） 包裝:托盤 產(chǎn)品目錄頁面:1423 (CN2011-ZH PDF)
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