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參數(shù)資料
| 型號： | LTC4210-2IS6 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 電源管理 |
| 英文描述： | Microprocessor Crystal; Frequency:32.768MHz; Frequency Tolerance:20ppm; Load Capacitance:18pF; Crystal Terminals:Radial Leaded; ESR:25ohm; Leaded Process Compatible:Yes; Mounting Type:Through Hole; No. of Pins:2 RoHS Compliant: Yes |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO6 |
| 封裝： | 1 MM HEIGHT, PLASTIC, MO-193, TSOT-23, 6 PIN |
| 文件頁數(shù)： | 11/20頁 |
| 文件大小： | 246K |
| 代理商： | LTC4210-2IS6 |
11
LTC4210-1/LTC4210-2
421012f
Whichever method of compensation is used, board level
short-circuit testing is highly recommended as board
layout can affect transient performance. Beside frequency
compensation, the total gate capacitance C
GATE
also
determines the GATE start-up as in Equation 6. The C
GATE
should be kept below 0.15
μ
F at high supply operation as
the capacitive energy ( 0.5 C
GATE
V
GATE2
) is discharged
by the LTC4210 internal pull-down transistor. This pre-
vents the internal pull-down transistor from overheating
when the GATE turns off and/or is servoing during current
limiting.
Timer Function
The TIMER pin handles several key functions with an
external capacitor, C
TIMER
. There are two comparator
thresholds: COMP1 (0.2V) and COMP2 (1.3V). The four
timing current sources are:
5
μ
A pull-up
60
μ
A pull-up
2
μ
A pull-down
100
μ
A pull-down
The 100
μ
A is a nonideal current source approximating a
7k resistor below 0.4V.
Initial Timing Cycle
When the card is being inserted into the bus connector, the
long pins mate first which brings up the supply V
IN
at time
point 1 of Figure 3. The LTC4210 is in reset mode as the
ON pin is low. GATE is pulled low and the TIMER pin is
pulled low with a 100
μ
A source. At time point 2, the short
pin makes contact and ON is pulled high. At this instant, a
start-up check requires that the supply voltage be above
UVLO, the ON pin be above 1.3V and the TIMER pin voltage
be less than 0.2V. When these three conditions are ful-
filled, the initial cycle begins and the TIMER pin is pulled
high with 5
μ
A. At time point 3, the TIMER reaches the
COMP2 threshold and the first portion of the initial cycle
ends. The 100
μ
A current source then pulls down the
TIMER pin until it reaches 0.2V at time point 4. The initial
cycle delay (time point 2 to time point 4) is related to
C
TIMER
by equation:
t
INITIAL
≈
272.9 C
TIMER
ms/
μ
F
When the initial cycle terminates, a start-up cycle is
activated and the GATE pin ramps high. The TIMER pin
continues to be pulled down towards ground.
(5)
APPLICATIOU
W
U
U
1
>2.5V
COMP2
100
μ
A
COMP1
10
μ
A
V
IN
V
ON
V
GATE
RESET
MODE
V
OUT
V
TIMER
2
3 4 5
6
7
4210 F03
5
μ
A
INITIAL
CYCLE
START-UP
CYCLE
NORMAL
CYCLE
DISCHARGE
BY LOAD
V
TH
>1.3V
Figure 3. Normal Operating Sequence
Start-Up Cycle Without Current Limit
The GATE is released with a 10
μ
A pull-up at time point 4
of Figure 3. At time point 5, GATE reaches the external
MOSFET threshold V
TH
and V
OUT
starts to follow the GATE
ramp up. If the R
SENSE
current is below the current limit,
the GATE ramps at a constant rate of:
=
V
T
I
C
GATE
GATE
GATE
(6)
where C
GATE
is the total capacitance at the GATE pin.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC4210-1IS6 | Hot Swap Controller in 6-Lead SOT-23 Package |
| LTC4210-2CS6 | Hot Swap Controller in 6-Lead SOT-23 Package |
| LTC4210-1 | Hot Swap Controller in 6-Lead SOT-23 Package |
| LTC4210-1CS6 | Hot Swap Controller in 6-Lead SOT-23 Package |
| LTC4210-2 | Hot Swap Controller in 6-Lead SOT-23 Package |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC4210-2IS6#PBF | 制造商:Linear Technology 功能描述:HOT SWAP CNTRL INT SWITCH 6T 制造商:Linear Technology 功能描述:HOT SWAP CNTRL, INT SWITCH, 6TSOT23 制造商:Linear Technology 功能描述:HOT SWAP CONTROLLER, 2.7-16.5V, TSOT-23-6; Controller Applications:Electronic Circuit Breaker, Hot Board Insertion, Industrial High Side Switch / Circuit Breaker; Internal Switch:Yes; Supply Voltage Min:2.7V; Supply Voltage Max:16.5V;RoHS Compliant: Yes |
| LTC4210-2IS6#TR | 功能描述:IC CONTROLLER HOT SWAP TSOT23-6 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 |
| LTC4210-2IS6#TRM | 制造商:Linear Technology 功能描述:Hot Swap Controller 1-CH 16.5V 6-Pin TSOT-23 T/R |
| LTC4210-2IS6#TRMPBF | 功能描述:IC CONTROLLER HOT SWAP TSOT23-6 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 |
| LTC4210-2IS6#TRPBF | 功能描述:IC CONTROLLER HOT SWAP TSOT23-6 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 |
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