参数资料
| 型号： | LT4356CS-3#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 14/24页 |
| 文件大小： | 0K |
| 描述： | IC SURGE STOPPER ADJ 16-SOIC |
| 产品目录绘图： | LT4356 Output Graph LT4356 Series 16-SOIC |
| 标准包装： | 2,500 |
| 电压 - 工作： | 4 ~ 80V |
| 电压 - 箝位： | 27V，可调 |
| 技术： | 混合技术 |
| 电路数： | 1 |
| 应用： | 自动 |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SOIC |
| 包装： | 带卷 (TR) |
| 配用： | DC1018B-C-ND - DEMO BOARD FOR LT4356-3 DC1018B-B-ND - DEMO BOARD FOR LT4356-2 DC1018B-A-ND - DEMO BOARD FOR LT4356-1 |
LT4356-3
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.
INPUT
R6
100k
R LIM
*4.7
D1*
BAV99
2N2905A OR
BCP53
10μF
2.5V OUTPUT
≈ 150mA MAX
* OPTIONAL FOR
CURRENT LIMIT
11
V OUT = 1.25
R4
A OUT
0.7
249k
LT4356DE-3 I LIM ≈
IN +
V OUT
V IN
D2*
R4
R3
R5
SMAJ58CA
10
10
2N3904
R7
10k
V CC
FB
SHDN
FLT
A OUT
IN +
EN
Theextragatecapacitanceslowsdowntheturnofftime
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.
Q1
D1
IN4148W
R3
R1
C1
GATE
LT4356-3
43563 F05
Figure 5
Auxiliary Amplifier
An uncommitted amplifier is included in the LT4356-3 to
provide flexibility in the system design. With the negative
input connected internally to the 1.25V reference, the
amplifier can be connected as a level detect comparator
with external hysteresis. The open collector output pin,
A OUT , 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 amplifier can also be configured 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 amplifier is turned off when the
LT4356-3 is shut down.
R4 + R5
R5
47nF
12 R LIM
R5
249k
43563 F06
Figure 6. Auxiliary LDO Output with Optional Current Limit
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 V CC , 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.
R SNS Q2 Q1
10m IRLR2908 IRLR2908
12V 12V, 3A
CLAMPED
AT 16V
Q3
1M
R1
59k
D1
1N4148
5 4 3
SNS GATE OUT
6 2
R2
4.99k
LT4356DE-3
7
11 8
12 9
GND TMR
*DIODES INC.
10
1
C TMR
0.1μF
43563 F07
Figure 7. Overvoltage Regulator with N-channel MOSFET
Reverse Input Protection
43563fb
14
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相关代理商/技术参数 |
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| LT4356HDE-1 | 制造商:Linear Technology 功能描述:Hot Swap Controller 1-CH 80V 12-Pin DFN EP |
| LT4356HDE-1#PBF | 功能描述:IC OVERVOLT PROT REG 12-DFN RoHS:是 类别:过电压，电流，温度装置 >> 电涌抑制 IC 系列:- 产品培训模块:LT4356 Surge Stopper 产品目录绘图:LT4356 Output Graph LT4356 Series 10-MSOP 标准包装:2,500 系列:- 电压 - 工作:4 ~ 80V 电压 - 箝位:27V，可调 技术:混合技术 功率（瓦特）:- 电路数:1 应用:自动 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-MSOP 包装:带卷 (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 |
| LT4356HDE-1#TRPBF | 功能描述:IC OVERVOLT PROT REG 12-DFN RoHS:是 类别:过电压，电流，温度装置 >> 电涌抑制 IC 系列:- 产品培训模块:LT4356 Surge Stopper 产品目录绘图:LT4356 Output Graph LT4356 Series 10-MSOP 标准包装:2,500 系列:- 电压 - 工作:4 ~ 80V 电压 - 箝位:27V，可调 技术:混合技术 功率（瓦特）:- 电路数:1 应用:自动 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-MSOP 包装:带卷 (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 |
| LT4356HDE-1PBF | 制造商:Linear Technology 功能描述:Surge Protection Adj Regulator 4-80V 7uA |
| LT4356HDE-1-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Overvoltage Protection Regulator and Inrush Limiter |
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