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參數(shù)資料
| 型號： | LTC1422CN8 |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 8/16頁 |
| 文件大?。?/td> | 197K |
| 描述： | IC CONTROLLER HOT SWAP 8-DIP |
| 標(biāo)準(zhǔn)包裝： | 50 |
| 類型： | 熱交換控制器 |
| 應(yīng)用： | 通用 |
| 內(nèi)部開關(guān)： | 無 |
| 電源電壓： | 2.7 V ~ 12 V |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 通孔 |
| 封裝/外殼： | 8-DIP（0.300"，7.62mm） |
| 供應(yīng)商設(shè)備封裝： | 8-PDIP |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁面： | 1341 (CN2011-ZH PDF) |
8
LTC1422
1422fb
APPLICATIONS INFORMATION
U
U
U
V
OUT
TIMER
RESET
V2
V2
V2
V1
V1
1.232V
1.232V
1
2
3
4
1422 F04
Figure 4. Supply Monitor Waveforms
When the voltage at the FB pin rises above its reset
threshold (1.232V), the comparator COMP 2 output goes
high, and a timing cycle starts (Figure 4, time points 1 and
4). After a complete timing cycle, RESET is pulled high.
The 12礎(chǔ) pull-up current source to V
CC
on RESET has a
series diode so the pin can be pulled above V
CC
by an
external pull-up resistor without forcing current back into
supply.
When the supply voltage at the FB pin drops below its reset
threshold, the comparator Comp 2 output goes low. After
passing through a glitch filter, RESET is pulled low (time
point 2). If the FB pin rises above the reset threshold for
less than a timing cycle, the RESET output will remain low
(time point 3).
Glitch Filter
The LTC1422 has a glitch filter to prevent RESET from
generating a system reset when there are transients on the
FB pin. The filter is 20祍 for large transients (greater than
150mV) and up to 80祍 for small transients. The relation-
ship between glitch filter time and the transient voltage is
shown in Typical Performance curve: Glitch Filter Time vs
Feedback Transient.
Soft Reset
In some cases a system reset is desired without a power
down. The ON pin can signal the RESET pin to go low
without turning off the external N-channel (a soft reset).
This is accomplished by holding the ON pin low for only
15祍 or less (Figure 5, time point 1). At about 30祍 from
the falling edge of the ON pin (time point 2) the RESET pin
goes low and stays low for one timing cycle.
Figure 5. Soft Reset Waveforms
ESET
V
OUT
GATE
1422 F
IMER
ON
30祍
1
2
30祍 (typ)
3
4
6
5
15祍
20 s
If the ON pin is held low for longer than 30祍 (typ), the gate
will turn off and the RESET pin will eventually go low (time
points 4, 5 and 6).
Timer
The system timing for the LTC1422 is generated by the
circuitry shown in Figure 6. The timer is used to set the
turn-on delay after the ON pin goes high and the delay
before the RESET pin goes high after the output supply
voltage is good as sensed by the FB pin.
+
SENSE
TIMER
2礎(chǔ)
R4
R3
R2
7
V
CC
V
OUT
V
CC
8
GATE
LTC1422
6
2
ON
1422 F06
SUPPLY
MONITOR
1
5
C2
3
4
RESET
C1
C
LOAD
Q2
R1
LOGIC
1.232V
+
COMP 4
Q1
Figure 6. System Timing Block Diagram
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| LTC1422CN8#PBF | 功能描述:IC CONTROLLER HOT SWAP 8-DIP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 類型:熱交換控制器 應(yīng)用:-48V 遠(yuǎn)程電力系統(tǒng)，AdvancedTCA ? 系統(tǒng)，高可用性 內(nèi)部開關(guān):無 電流限制:可調(diào) 電源電壓:11.5 V ~ 14.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:10-MSOP 包裝:管件 |
| LTC1422CS8 | 功能描述:IC CONTROLLER HOT SWAP 8-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 類型:熱交換控制器 應(yīng)用:-48V 遠(yuǎn)程電力系統(tǒng)，AdvancedTCA ? 系統(tǒng)，高可用性 內(nèi)部開關(guān):無 電流限制:可調(diào) 電源電壓:11.5 V ~ 14.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:10-MSOP 包裝:管件 |
| LTC1422CS8#PBF | 功能描述:IC CONTROLLER HOT SWAP 8-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:119 系列:- 類型:熱交換控制器 應(yīng)用:通用型，PCI Express? 內(nèi)部開關(guān):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(yīng)商設(shè)備封裝:80-TQFP（12x12） 包裝:托盤 產(chǎn)品目錄頁面:1423 (CN2011-ZH PDF) |
| LTC1422CS8#TR | 功能描述:IC CONTROLLER HOTSWAP 8SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:100 系列:- 類型:熱插拔開關(guān) 應(yīng)用:通用 內(nèi)部開關(guān):是 電流限制:可調(diào) 電源電壓:9 V ~ 13.2 V 工作溫度:-40°C ~ 150°C 安裝類型:表面貼裝 封裝/外殼:10-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:10-TDFN-EP（3x3） 包裝:管件 |
| LTC1422CS8#TRPBF | 功能描述:IC CONTROLLER HOT SWAP 8-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:100 系列:- 類型:熱插拔開關(guān) 應(yīng)用:通用 內(nèi)部開關(guān):是 電流限制:可調(diào) 電源電壓:9 V ~ 13.2 V 工作溫度:-40°C ~ 150°C 安裝類型:表面貼裝 封裝/外殼:10-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:10-TDFN-EP（3x3） 包裝:管件 |
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