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參數資料
| 型號： | LT4356CDE-3#TR |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 模擬信號調理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO12 |
| 封裝： | 4 X 3 MM, PLASTIC, M0-229WGED, DFN-12 |
| 文件頁數： | 6/24頁 |
| 文件大小： | 231K |
| 代理商： | LT4356CDE-3#TR |
LT4356-3
14
43563fa
Figure 5
Figure 6. Auxiliary LDO Output with Optional Current Limit
C1
R3
43563 F05
LT4356-3
GATE
Q1
R1
D1
IN4148W
*4.7Ω
D1*
BAV99
2N2905A OR
BCP53
R4
249k
47nF
INPUT
2.5V OUTPUT
≈ 150mA MAX
*OPTIONAL FOR
CURRENT LIMIT
LT4356DE-3
AOUT
RLIM
11
12
R6
100k
R5
249k
43563 F06
IN+
10μF
R4 + R5
R5
VOUT = 1.25
ILIM ≈
0.7
RLIM
APPLICATIONS INFORMATION
The LT4356-3 does not need extra compensation compo-
nents at the GATE pin for stability during an overvoltage or
overcurrent event. However, with fast, high voltage transient
steps at the input, a gate capacitor, C1, to ground is needed
to prevent turn-on of the N-channel MOSFET.
The extra gate capacitance slows down the turn off time
during fault conditions and may allow excessive current
during an output short event. An extra resistor, R1, in series
with the gate capacitor can improve the turn off time. A
diode, D1, should be placed across R1 with the cathode
connected to C1 as shown in Figure 5.
Reverse Input Protection
A blocking diode is commonly employed when reverse
input potential is possible, such as in automotive applica-
tions. This diode causes extra power loss, generates heat,
and reduces the available supply voltage range. During
cold crank, the extra voltage drop across the diode is
particularly undesirable.
The LT4356-3 is designed to withstand reverse voltage
without damage to itself or the load. The VCC, SNS, and
SHDN pins can withstand up to 60V of DC voltage below
the GND potential. Back-to-back MOSFETs must be used
to eliminate the current path through their body diodes
(Figure 7). Figure 8 shows the approach with a P-Channel
MOSFET in place of Q2.
Figure 7. Overvoltage Regulator with N-channel MOSFET
Reverse Input Protection
CTMR
0.1μF
RSNS
10mΩ
Q1
IRLR2908
Q2
IRLR2908
VIN
12V
VOUT
12V, 3A
CLAMPED
AT 16V
43563 F07
LT4356DE-3
GND
TMR
10
1
OUT
SNS
3
5
SHDN
7
AOUT
11
IN+
12
VCC
6
EN
FLT
FB
9
8
2
D2*
SMAJ58CA
R2
4.99k
R1
59k
GATE
4
R7
10k
R5
1M
Q3
2N3904
D1
1N4148
R3
10Ω
R4
10Ω
*DIODES INC.
Auxiliary Amplier
An uncommitted amplier is included in the LT4356-3 to
provide exibility in the system design. With the negative
input connected internally to the 1.25V reference, the am-
plier can be connected as a level detect comparator with
external hysteresis. The open collector output pin, AOUT,
is capable of driving an opto or LED. It can also interface
with the system via a pull-up resistor to a supply voltage
up to 80V.
The amplier can also be congured as a low dropout
linear regulator controller. With an external PNP transistor,
such as 2N2905A, it can supply up to 100mA of current
with only a few hundred mV of dropout voltage. Current
limit can be easily included by adding two diodes and one
resistor (Figure 6). The amplier is turned off when the
LTC4356-3 is shut down.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LT4356CDE-3TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Surge Stopper with Fault Latchoff |
| LT4356CMS-1 | 制造商:Linear Technology 功能描述:Hot Swap Controller 1-CH 80V 10-Pin MSOP |
| LT4356CMS-1#PBF | 功能描述:IC OVERVOLT PROT REG 10-MSOP RoHS:是 類別:過電壓，電流，溫度裝置 >> 電涌抑制 IC 系列:- 產品培訓模塊:LT4356 Surge Stopper 產品目錄繪圖:LT4356 Output Graph LT4356 Series 10-MSOP 標準包裝:2,500 系列:- 電壓 - 工作:4 ~ 80V 電壓 - 箝位:27V，可調 技術:混合技術 功率（瓦特）:- 電路數:1 應用:自動 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應商設備封裝:10-MSOP 包裝:帶卷 (TR) 配用:DC1018B-C-ND - DEMO BOARD FOR LT4356-3DC1018B-B-ND - DEMO BOARD FOR LT4356-2DC1018B-A-ND - DEMO BOARD FOR LT4356-1 |
| LT4356CMS-1#TRPBF | 功能描述:IC OVERVOLT PROT REG 10-MSOP RoHS:是 類別:過電壓，電流，溫度裝置 >> 電涌抑制 IC 系列:- 產品培訓模塊:LT4356 Surge Stopper 產品目錄繪圖:LT4356 Output Graph LT4356 Series 10-MSOP 標準包裝:2,500 系列:- 電壓 - 工作:4 ~ 80V 電壓 - 箝位:27V，可調 技術:混合技術 功率（瓦特）:- 電路數:1 應用:自動 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應商設備封裝:10-MSOP 包裝:帶卷 (TR) 配用:DC1018B-C-ND - DEMO BOARD FOR LT4356-3DC1018B-B-ND - DEMO BOARD FOR LT4356-2DC1018B-A-ND - DEMO BOARD FOR LT4356-1 |
| LT4356CMS-1PBF | 制造商:Linear Technology 功能描述:Overvoltage Protection Regulator LT4356 |
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