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参数资料
| 型号： | LTC4425EMSE#TRPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO12 |
| 封装： | LEAD FREE, PLASTIC, MSOP-12 |
| 文件页数： | 3/20页 |
| 文件大小： | 239K |
| 代理商： | LTC4425EMSE#TRPBF |
LTC4425
11
4425f
OPERATION
Output Status Monitor
The LTC4425 has an internal comparator to always monitor
the output voltage VOUT. At any time, if VOUT falls below
7.5% of its nal programmed value in LDO mode or
more than 250mV below the input voltage VIN in charge
current prole mode, the comparator reports the power-
fail condition by pulling the same open-drain output PFO
low. When both input and output voltages are good for at
least 200ms, the PFO pin goes high impedance and can be
pulled up to any external supply by a resistor to indicate
a power good situation. In normal mode, the load should
not exceed 1/10th of the programmed charge current
until PFO is high.
VOUT > VIN Operation
If the EN pin is pulled high and VIN is below VOUT or oating,
most of the circuitry including the voltage clamp circuitry is
kept alive and the part draws about 20μA from the output
capacitors. However, the internal leakage balancer is turned
off under this condition.
Shutdown Mode
The LTC4425 can be shut down by pulling the EN pin low.
In shutdown mode, very minimal circuitry is alive and
the part draws less than 3μA from the supply or from the
output capacitors if the supply is not present.
Charge Current Soft-Start
The LTC4425 includes a soft-start circuit to minimize
the inrush current at the start of a charge cycle. When a
charge cycle is initiated, the charge current ramps from
zero to full-scale over a period of approximately 1ms and
this soft-start can be monitored by observing the PROG
pin voltage. This has the effect of minimizing the transient
current load on the power supply during start-up.
Thermal Shutdown
The LTC4425 includes a thermal shutdown circuit in ad-
dition to the thermal regulator. If for any reason, the die
temperature exceeds 160°C, the entire part shuts down.
It resumes normal operation once the temperature drops
by about 14°C, to approximately 146°C.
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相关代理商/技术参数 |
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| LTC4425IDD#PBF | 功能描述:IC SUPERCAP CHARGER 12-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:- 标准包装:1 系列:- 应用:手持/移动设备 电流 - 电源:- 电源电压:3 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-WFDFN 裸露焊盘 供应商设备封装:14-LLP-EP（4x4） 包装:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名称:LP3905SD-30DKR |
| LTC4425IDD#TRPBF | 功能描述:IC SUPERCAP CHRGR DIO/MON 12DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:- 标准包装:1 系列:- 应用:手持/移动设备 电流 - 电源:- 电源电压:3 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-WFDFN 裸露焊盘 供应商设备封装:14-LLP-EP（4x4） 包装:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名称:LP3905SD-30DKR |
| LTC4425IMSE#PBF | 功能描述:IC SUPERCAP CHARGER 12-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:- 标准包装:1 系列:- 应用:手持/移动设备 电流 - 电源:- 电源电压:3 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-WFDFN 裸露焊盘 供应商设备封装:14-LLP-EP（4x4） 包装:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名称:LP3905SD-30DKR |
| LTC4425IMSE#TRPBF | 功能描述:IC SUPERCAP CHRGR DIO/MON 12MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:- 标准包装:1 系列:- 应用:手持/移动设备 电流 - 电源:- 电源电压:3 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-WFDFN 裸露焊盘 供应商设备封装:14-LLP-EP（4x4） 包装:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名称:LP3905SD-30DKR |
| LTC4440AHMS8E-5#PBF | 制造商:Linear Technology 功能描述:IC HIGH-SIDE DVR HS HV 8-MSOP 制造商:Linear Technology 功能描述:IC, HIGH SIDE GATE DRIVER, MOSFET, MSOP8 制造商:Linear Technology 功能描述:DRIVER, MOSFET, 1.1A, MSOP-8, Device Type:MOSFET, Module Configuration:High Side, Peak Output Current:1.1A, Supply Voltage Min:3.2V, Supply Voltage Max:80V, Driver Case Style:MSOP, No. of Pins:8, Input Delay:35ns, Output Delay:33ns , RoHS Compliant: Yes |
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