参数资料
| 型号： | LT4356CS-3#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 7/24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
PIN FUNCTIONS
A OUT (DFN and SO Packages Only): Amplifier Output.
Open collector output of the auxiliary amplifier. It is capable
of sinking up to 2mA from 80V. The negative input of the
amplifier is internally connected to a 1.25V reference.
EN: Open-Collector Enable Output. The EN pin goes high
impedance when the voltage at the OUT pin is above (V CC
– 0.7V), indicating the external MOSFET is fully on. The
state of the pin is latched until the OUT pin voltage resets
at below 0.5V and goes back up above 2V. The internal
NPN is capable of sinking up to 3mA of current from 80V
to drive an LED or opto-coupler.
Exposed Pad: Exposed pad may be left open or connected
to device ground (GND).
FB: Voltage Regulator Feedback Input. Connect this pin
to the center tap of the output resistive divider connected
between the OUT pin and ground. During an overvoltage
condition, the GATE pin is servoed to maintain a 1.25V
threshold at the FB pin. This pin is clamped internally to
7V. Tie to GND to disable the OV clamp.
FLT : Open-Collector Fault Output. This pin pulls low
after the voltage at the TMR pin has reached the fault
threshold of 1.25V. It indicates the pass transistor is
about to turn off because either the supply voltage has
stayed at an elevated level for an extended period of
time (voltage fault) or the device is in an overcurrent
condition (current fault). The internal NPN is capable of
sinking up to 3mA of current from 80V to drive an LED or
opto-coupler.
GATE: N-Channel MOSFET Gate Drive Output. The GATE
pin is pulled up by an internal charge pump current source
and clamped to 14V above the OUT pin. Both voltage and
current amplifiers control the GATE pin to regulate the
output voltage and limit the current through the MOSFET.
GND: Device Ground.
IN + (DFN and SO Packages Only): Positive Input of the
Auxiliary Amplifier. This amplifier can be used as a level
detection comparator with external hysteresis or linear
regulator controlling an external PNP transistor. This pin
is clamped internally to 7V. Connect to ground if unused.
OUT: Output Voltage Sense Input. This pin senses the
voltage at the source of the N-channel MOSFET and sets
the fault timer current. When the OUT pin voltage reaches
0.7V away from V CC , the EN pin goes high impedance.
SHDN : Shutdown Control Input. The LT4356-3 can be shut
down to a low current mode by pulling the SHDN pin below
the shutdown threshold of 0.4V. All functions, including
the spare amplifier, are turned off. Pull this pin above 1.7V
or disconnect it and allow the internal current source to
turn the part back on. After GATE pin pulls low due to fault
time out, the part can be restarted by pulling the SHDN
pin low for at least 100μs and pulled high with a slew rate
faster than 10V/ms. The leakage current to ground at the
pin should be limited to no more than 1μA if no pull up
device is used to turn the part on. The SHDN pin can be
pulled up to 100V or below GND by 60V without damage.
SNS: Current Sense Input. Connect this pin to the output of
the current sense resistor. The current limit circuit controls
the GATE pin to limit the sense voltage between V CC and
SNS pins to 50mV. At the same time the sense amplifier
also starts a current source to charge up the TMR pin.
This pin can be pulled below GND by up to 60V, though
the voltage difference with the V CC pin must be limited to
less than 30V. Connect to V CC if unused.
TMR: Fault Timer Input. Connect a capacitor between this
pin and ground to set the times for early warning and fault
periods. The current charging up this pin during fault
conditions depends on the voltage difference between the
V CC and OUT pins. When V TMR reaches 1.25V, the FLT pin
pulls low to indicate the detection of a fault condition. If
the condition persists, the pass transistor turns off when
V TMR reaches the threshold of 1.35V. The GATE pin remains
low even after the fault condition has disappeared and the
voltage at the TMR pin has reached 0.5V.
V CC : Positive Supply Voltage Input. The positive supply
input ranges from 4V to 80V for normal operation. It
can also be pulled below ground potential by up to 60V
during a reverse battery condition, without damaging the
part. The supply current is reduced to 7μA with all the
functional blocks off.
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| 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 |
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