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参数资料
| 型号： | LM3544M-H/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 电源管理 |
| 英文描述： | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16 |
| 封装： | LEAD FREE, SOIC-16 |
| 文件页数： | 4/13页 |
| 文件大小： | 785K |
| 代理商： | LM3544M-H/NOPB |
Typical Applications (Continued)
the LM3544 can be configured to switch the power connec-
tion of a device between two separate sources is shown in
Figure 8, below.
In the example, the logic signals EN and SRC control the
power supply connections. If the EN signal is low, all four
LM3544 switches will be open and neither supply will be
connected to the bus. If EN and SRC are both high, switch 1
and switch 3 close, connecting the main power supply to the
two bus power outputs. When EN is high and SRC is low, the
auxiliary supply is connected to the power outputs through
switches 2 and 4.
In order to allow the power-switching circuit to smoothly
transition from one supply to another, delay networks must
be placed before the enable pins. These delay networks
account for the turn-on delay of the LM3544 switches by
slowing the fall time of the enable signals. Rise times of
these signals are not affected by the delay networks. Glitch
free transition is assured as long as both supplies remain
within operating specifications for a minimum of 5 ms after
the logic signal SRC is toggled.
10120830
FIGURE 8. Using the LM3544 in a Wake-on-USB Application
LM3544
www.national.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM3544M-L | 功能描述:电源开关 IC - USB RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube |
| LM3544M-L/NOPB | 功能描述:电源开关 IC - USB RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube |
| LM3544MX-H | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Quad Port USB Power Distribution Switch and Over-Current Protection |
| LM3544MX-H/NOPB | 功能描述:IC USB QUAD PORT SWITCH 16-SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 电源分配开关 系列:- 特色产品:XRP252 Switches 标准包装:1 系列:- 类型:高端开关 输出数:2 Rds（开）:140 毫欧 内部开关:是 电流限制:1.15A 输入电压:1.75 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:10-WFDFN 裸露焊盘 供应商设备封装:10-TDFN（3x3） 包装:Digi-Reel® 其它名称:1016-1691-6 |
| LM3544MX-L | 功能描述:电源开关 IC - USB RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube |
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