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参数资料
| 型号： | LTC4414IMS8#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/12页 |
| 文件大小： | 0K |
| 描述： | IC CNTRLR POWERPATH 8-MSOP |
| 标准包装： | 50 |
| 系列： | PowerPath™ |
| 应用： | 电池备份，工业/汽车，大电流开关 |
| FET 型： | P 沟道 |
| 输出数： | 1 |
| 内部开关： | 无 |
| 延迟时间 - 开启： | 600µs |
| 延迟时间 - 关闭： | 20µs |
| 电源电压： | 3 V ~ 36 V |
| 电流 - 电源： | 33µA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-MSOP |
| 包装： | 管件 |
LTC4414
36V, Low Loss PowerPath TM
Controller for Large PFETs
FEATURES
DESCRIPTIO
■
■
■
■
■
■
■
■
■
■
■
Designed Specifically to Drive Large Q G PFETs
Very Low Loss Replacement for Power Supply
OR’ing Diodes
3.5V to 36V AC/DC Adapter Voltage Range
Minimal External Components
Automatic Switching Between DC Sources
Low Quiescent Current: 30 μ A
3V to 36V Battery Voltage Range
Limited Reverse Battery Protection
MOSFET Gate Protection Clamp
Manual Control Input
Space Saving 8-Lead MSOP Package
The LTC ? 4414 controls an external P-channel MOSFET to
create a near ideal diode function for power switchover.
This permits highly efficient OR’ing of multiple power
sources for extended battery life and low self- heating. When
conducting, the voltage drop across the MOSFET is typi-
cally 20mV. For applications with a wall adapter or other aux-
iliary power source, the load is automatically disconnected
from the battery when the auxiliary source is connected.
Two or more LTC4414s may be interconnected to allow
switchover between multiple batteries or charging of mul-
tiple batteries from a single charger.
The wide supply operating range supports operation from
APPLICATIO S
■ High Current Power Path Switch
■ Industrial and Automotive Applications
■ Uninterruptable Power Supplies
■ Logic Controlled Power Switch
■ Battery Backup Systems
■ Emergency Systems with Battery Backups
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
PowerPath and ThinSOT are trademarks of Linear Technology Corporation. All other
one to eight Li-Ion cells in series. The low quiescent
current (30 μ A typical) is independent of the load current.
The gate driver includes an internal voltage clamp for
MOSFET protection.
The STAT pin can be used to enable an auxiliary P-channel
MOSFET power switch when an auxiliary supply is
detected. This pin may also be used to indicate to a micro-
controller that an auxiliary supply is connected. The con-
trol (CTL) input enables the user to force the primary
MOSFET off and the STAT pin low.
trademarks are the property of their respective owners.
The LTC4414 is available in a low profile 8-lead MSOP
package.
TYPICAL APPLICATIO
LTC4414 vs Schottky Diode Forward Voltage Drop
Automatic Switchover of Load Between a Battery and a Power Supply
8.0
POWER
SUPPLY
INPUT
UPS840
SUP75P03_07
3.6
CONSTANT
R ON
BATTERY
CELL(S)
LTC4414
V IN SENSE
C OUT
V CC
TO LOAD
LTC4414
CONSTANT
GND
CTL
NC
GATE
STAT
NC
470k
4414 TA 01
STATUS OUTPUT
LOW WHEN POWER
SUPPLY PRESENT
VOLTAGE
SCHOTTKY
DIODE
0
0.02
FORWARD VOLTAGE (V)
0.5
4414 TA01b
4414fc
1
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