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參數(shù)資料
| 型號： | LT4356MPS-2 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO16 |
| 封裝： | 0.150 INCH, PLASTIC, SOP-16 |
| 文件頁數(shù)： | 6/24頁 |
| 文件大?。?/td> | 214K |
| 代理商： | LT4356MPS-2 |
LT4356MP-1/LT4356MP-2
14
4356mp12fa
Figure 5
Figure 6. Auxiliary LDO Output with Optional Current Limit
APPLICATIONS INFORMATION
The LTC4356 does not need extra compensation compo-
nents at the GATE pin for stability during an overvoltage or
overcurrent event. With transient input voltage step faster
than 5V/μs, a gate capacitor, C1, to ground is needed to
prevent self enhancement 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.
Auxiliary Amplier
An uncommitted amplier is included in the LT4356 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. Another use is to implement undervoltage
lockout, as shown in the typical application “Overvoltage
Regulator with Undervoltage Lockout.” In shutdown, the
auxiliary amplier turns off in the LTC4356-1 but continues
operating in the LT4356-2.
C1
R3
4356 F05
LT4356S
GATE
Q1
R1
D1
IN4148W
RLIM
*4.7Ω
D1*
BAV99
2N2905A OR
BCP53
INPUT
2.5V OUTPUT
≈ 150mA MAX
*OPTIONAL FOR
CURRENT LIMIT
LT4356S
AOUT
IN+
11
12
R6
100k
4356 F06
R4
249k
47nF
R5
249k
10μF
VOUT 1.25
R4 R5
R5
ILIM
0.7
RLIM
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).
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 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.
相關(guān)PDF資料 |
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| LT4356MPMS-1 | SPECIALTY ANALOG CIRCUIT, PDSO10 |
| LT4356MPMS-1#TR | SPECIALTY ANALOG CIRCUIT, PDSO10 |
| LT505-CHIP | AUDIO AMPLIFIER, UUC8 |
| LT505-PLID | AUDIO AMPLIFIER, PDSO8 |
| LT505-SLT | AUDIO AMPLIFIER, PDIP8 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT4356MPS-2#PBF | 功能描述:IC SURGE STOPPER ADJ 16-SOIC RoHS:是 類別:過電壓，電流，溫度裝置 >> 電涌抑制 IC 系列:- 產(chǎn)品培訓(xùn)模塊:LT4356 Surge Stopper 產(chǎn)品目錄繪圖:LT4356 Output Graph LT4356 Series 10-MSOP 標(biāo)準(zhǔn)包裝:2,500 系列:- 電壓 - 工作:4 ~ 80V 電壓 - 箝位:27V，可調(diào) 技術(shù):混合技術(shù) 功率（瓦特）:- 電路數(shù):1 應(yīng)用:自動 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: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 |
| LT4356MPS-2#TR | 制造商:Linear Technology 功能描述:Hot Swap Controller 1-CH 80V 16-Pin SOIC N T/R |
| LT4356MPS-2#TRPBF | 功能描述:IC SURGE STOPPER ADJ 16-SOIC RoHS:是 類別:過電壓，電流，溫度裝置 >> 電涌抑制 IC 系列:- 產(chǎn)品培訓(xùn)模塊:LT4356 Surge Stopper 產(chǎn)品目錄繪圖:LT4356 Output Graph LT4356 Series 10-MSOP 標(biāo)準(zhǔn)包裝:2,500 系列:- 電壓 - 工作:4 ~ 80V 電壓 - 箝位:27V，可調(diào) 技術(shù):混合技術(shù) 功率（瓦特）:- 電路數(shù):1 應(yīng)用:自動 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: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 |
| LT4356MPS-2PBF | 制造商:Linear Technology 功能描述:Surge Protect Adj Regulator 4-80V 60uA |
| LT4356MPS-2TR | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Surge Stopper |
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