参数资料
| 型号： | LT4351IMS#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/20页 |
| 文件大小： | 0K |
| 描述： | IC CTLR MOSFET DIODE-OR 10MSOP |
| 标准包装： | 50 |
| 应用： | 并行/冗余电源 |
| FET 型： | N 沟道 |
| 输出数： | 1 |
| 内部开关： | 无 |
| 延迟时间 - 关闭： | 600ns |
| 电源电压： | 1.2 V ~ 18 V |
| 电流 - 电源： | 1.4mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-MSOP |
| 包装： | 管件 |
| 产品目录页面： | 1338 (CN2011-ZH PDF) |
LT4351
MOSFET Diode-OR
Controller
Low Loss Replacement for ORing Diode in Multiple
External N-Channel MOSFETs for High Current
Internal Boost Regulator Supply for MOSFET
Wide Input Range: 1.2V to 18V
Fast Switching MOSFET Gate Control
Input Under and Overvoltage Detection
STATUS and FAULT Outputs for Monitoring
Internal MOSFET Gate Clamp
Available in a 10-pin MSOP Package
Paralleled Power Supplies
Uninterrupted Supplies
High Availability Systems
N + 1 Redundant Power Supplies
FEATURES
n
Sourced Power Supplies
n
Capability
n
Gate Drive
n
n
n
n
n
n
APPLICATIONS
n
n
n
n
L , LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks
and PowerPath and ThinSOT are trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
DESCRIPTION
The LT ? 4351 creates a near ideal diode using external
single or back-to-back N-channel MOSFETs. This ideal
diode function permits low loss ORing of multiple power
sources. Power sources can easily be ORed together to
increase total system power and reliability with minimal
effect on supply voltage or efficiency. Disparate power
supplies can be efficiently ORed together.
The IC monitors the input supply with respect to the load
and turns on the MOSFET(s) when the input supply is
higher. If the MOSFET’s R DS(ON) is sufficiently small, the
LT4351 will regulate the voltage across the MOSFET(s)
to 15mV. A STATUS pin indicates the MOSFET on-state.
An internal boost regulator generates the MOSFET gate
drive voltage. Low operating voltage allows for ORing of
supplies as low as 1.2V.
The LT4351 will disable power passage during undervolt-
age or overvoltage conditions. These voltages are set by
resistive dividers on the UV and OV pins. The undervoltage
threshold has user programmable hysteresis. Overvoltage
detection is filtered to reduce false triggering.
The LT4351 is available in a 10-pin MSOP package.
TYPICAL APPLICATION
Dual 5V Redundant Supply
Si4862DY
Si4862DY
POWER
SUPPLY
1
4.7μH
5V
10μF
1μF
1 ×
5V COMMON
C LOAD
LOAD
1 ×
5V
1μF
10μF
4.7μH
POWER
SUPPLY
2
MBR0530
V IN
V DD
GATE
OUT
OUT
GATE
V IN
V DD
MBR0530
24.9k
1%
232
1%
1.47k
1%
MBR0530
SW
UV
OV
LT4351
GND
STATUS
FAULT
STATUS
FAULT
LT4351
GND
SW
UV
OV
4351 TA01
MBR0530
24.9k
1%
232
1%
1.47k
1%
4351fd
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT4352 | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Voltage Surge |
| LT4356 | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Voltage Surge |
| LT4356-1 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Overvoltage Protection Regulator and Inrush Limiter |
| LT4356-2 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Surge Stopper with Ideal Diode n Adjustable Output Clamp Voltage |
| LT4356-3 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Surge Stopper with Fault Latchoff |
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