參數(shù)資料
型號(hào)： LTC1643AL-1IGN#TRPB
廠商： LINEAR TECHNOLOGY CORP
元件分類： 電源管理
英文描述： 4-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16
封裝： 0.150 INCH, LEAD FREE, PLASTIC, SSOP-16
文件頁數(shù)： 13/16頁
文件大?。?/td> 231K
代理商： LTC1643AL-1IGN#TRPB
6
LTC1643AL
LTC1643AL-1/LTC1643AH
1643afb
TYPICAL PERFORMANCE CHARACTERISTICS
UW
VEE Current Foldback
vs Temperature
ISINK (mA)
0
V
OL
(mV)
6
10
1643A 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 22
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 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
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 under-
voltage 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 low
until the 3VOUT pin exceeds 2.9V typically.
TEMPERATURE (
°C)
70
60
50
40
30
20
10
0
1643A 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
1643A G21
–25
0
50
100
125
3VIN Undervoltage Lockout
vs Temperature
TEMPERATURE (
°C)
70
60
50
40
30
20
10
0
1643A 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
1643A G26
–25
0
50
100
12VOUT = 12V
12VOUT = 0V
TEMPERATURE (
°C)
–50
CURRENT
FOLDBACK
(mA)
600
500
400
300
200
100
0
25
75
1643A G25
–25
0
50
100
VEEOUT = –12V
VEEOUT = 0V
相關(guān)PDF資料
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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LTC1643ALCGN#TR 功能描述:IC CTRLR HOTSWAP PCI BUS 16SSOP RoHS:否 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)
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LTC1643ALCGNPBF 制造商:Linear Technology 功能描述:Hot Swap Controller 2-Ch 12/13.2V SSOP16
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