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参数资料
| 型号： | LTC4361CDC-2#TRMPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封装： | 2 X 2 MM, LEAD FREE, PLASTIC, DFN-8 |
| 文件页数： | 13/16页 |
| 文件大小： | 327K |
| 代理商： | LTC4361CDC-2#TRMPBF |
LTC4361-1/LTC4361-2
6
436112fa
OPERATION
Mobile devices like cell phones and MP3/MP4 players have
highly integrated subsystems fabricated from deep submi-
cronCMOSprocesses.Thesmallformfactorisaccompanied
by low absolute maximum voltage ratings. The sensitive
electronics are susceptible to damage from transient or DC
overvoltage conditions from the power supply.
Failures or faults in the power adaptor can cause an over-
voltage event. So can hot-plugging an AC adaptor into the
power input of the mobile device (see LTC Application Note
88). Today’s mobile devices derive their power supply or
recharge their internal batteries from multiple alternative
inputs like AC wall adaptors, car battery adaptors and USB
ports. A user may unknowingly plug in the wrong adaptor,
damaging the device with a high or even a negative power
supply voltage.
The LTC4361 protects low voltage electronics from these
overvoltage conditions by controlling a low cost external
N-channel MOSFET congured as a pass transistor. At
power-up (VIN > 2.1V), a start-up delay cycle begins. Any
overvoltage condition causes the delay cycle to continue
until a safe voltage is present. When the delay cycle
completes, an internal high side switch driver slowly
ramps up the MOSFET gate, powering up the output at
a controlled rate and limiting the inrush current to the
output capacitor.
If the voltage at the IN pin exceeds 5.8V (VIN(OV)),
GATE is pulled low quickly to protect the load. The
incoming power supply must remain below 5.7V
(VIN(OV) – VOV) for the duration of the start-up delay to
restart the GATE ramp-up.
A sense resistor placed between IN and SENSE implements
an overcurrent protection with a 50mV trip threshold and
a 10μs glitch lter. After an overcurrent, the LTC4361-1
latches off while the LTC4361-2 restarts following a 130ms
delay.
The LTC4361 has a CMOS compatible ON input. When
driven low, the part is enabled. When driven high, the
external N-channel MOSFET is turned off and the supply
current of the LTC4361 drops to 1.5μA. The PWRGD pull-
down releases during this low current sleep mode, UVLO,
overvoltage or overcurrent and the subsequent 130ms
start-up delay. After the start-up delay, GATE starts its
slow ramp-up and ramps higher than VGATE(TH) to trigger
a 65ms delay cycle. When that completes, PWRGD pulls
low.The LTC4361 has a GATEP pin that drives an optional
external P-channel MOSFET to provide protection against
negative voltages at IN.
相关PDF资料 |
PDF描述 |
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| LTC4361IDC-2#TRMPBF | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| LTC4361CDC-1#TRMPBF | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| LTC4425IDD#PBF | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO12 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4361CTS8-1#PBF | 制造商:Linear Technology 功能描述:Over Voltage Protection Controller 8-Pin TSOT-23 制造商:Linear Technology 功能描述:Bulk 制造商:Linear Technology 功能描述:MS-Hot Swap/Low Voltage, Cut Tape Overvoltage/Overcurrent Protection Controller with Latchoff |
| LTC4361CTS8-1#TRMPBF | 功能描述:IC OVERVOLTAGE/CUR PROT TSOT23-8 RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 标准包装:50 系列:- 类型:热交换控制器 应用:-48V 远程电力系统，AdvancedTCA ? 系统，高可用性 内部开关:无 电流限制:可调 电源电压:11.5 V ~ 14.5 V 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 |
| LTC4361CTS8-1#TRPBF | 功能描述:IC CTLR OVP LATCHOFF TSOT23-8 RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 标准包装:50 系列:- 类型:热交换控制器 应用:-48V 远程电力系统，AdvancedTCA ? 系统，高可用性 内部开关:无 电流限制:可调 电源电压:11.5 V ~ 14.5 V 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 |
| LTC4361CTS8-2#PBF | 制造商:Linear Technology 功能描述: |
| LTC4361CTS8-2#TRMPBF | 功能描述:IC OVERVOLTAGE/CUR PROT TSOT23-8 RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 标准包装:50 系列:- 类型:热交换控制器 应用:-48V 远程电力系统，AdvancedTCA ? 系统，高可用性 内部开关:无 电流限制:可调 电源电压:11.5 V ~ 14.5 V 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 |
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