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74LVC1G58 PDF预览

74LVC1G58

更新时间： 2024-11-20 22:00:07
品牌 Logo 应用领域
恩智浦 - NXP /
页数 文件大小 规格书
19页 270K
描述
Low-power configurable multiple function gate

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74LVC1G58 数据手册

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TPS2149  
TPS2159  
SLVS401 – AUGUST 2001  
3.3-V LDO AND DUAL SWITCH  
FOR USB BUS-POWERED HUB POWER MANAGEMENT  
FEATURES  
DESCRIPTION  
Complete Power Management Solution for  
USB Bus-Powered Hubs  
The TPS2149 incorporates two power distribution  
switches and an LDO in one small package, providing  
a USB bus-powered hub power management solution  
that saves up to 60% in board space over typical  
implementations.  
3.3-V 200 mA Low-Dropout Voltage Regulator  
Two 5-V 340-mΩ (Typ) High-Side MOSFETs  
Independent Thermal- and Short-Circuit  
Protection for LDO and Each Switch  
The TPS2149 meets USB 2.0 bus-powered hub  
requirements. An integrated LDO regulates the 5-V bus  
power down to 3.3 V for the USB controller. The two  
MOSFET switches provide power to the downstream  
ports. With independent enables, the downstream ports  
remain unpowered until the hub completes  
enumeration.  
Overcurrent Indicator With Transient Filter  
2.9-V to 5.5-V Operating Range  
CMOS- and TTL-Compatible Enable Inputs  
75-µA (Typ) Supply Current  
Available in 8-Pin MSOP (PowerPAD )  
–40°C to 85°C Ambient Temperature Range  
Each power-distribution switch is capable of supplying  
200 mA of continuous current, and the independent  
logic enables are compatible with 5-V logic and 3-V  
logic. The switches and the LDO are designed with  
controlled rise times and fall times to minimize current  
surges.  
APPLICATIONS  
USB Bus-Powered Hubs  
– Keyboards  
– Monitors  
The TPS2149 has active-low enables while the  
TPS2159 has active-high enables.  
– Hub Boxes  
LDO and dual switch family selection guide and schematics  
TPS2149/59  
MSOP–8  
TPS2148/58  
MSOP–8  
TPS2145/55  
TSSOP–14  
TPS2147/57  
MSOP–10  
LDO_OUT  
LDO_ADJ  
V
IN/SW1  
VIN/SW1  
LDO_OUT  
VIN  
LDO  
VIN/SW1  
LDO_EN  
LDO_OUT  
OUT2  
LDO  
LDO_OUT  
LDO  
LDO  
LDO_EN  
EN2  
OC1  
OC1  
OUT1  
OC  
OUT1  
OUT1  
EN1  
OUT1  
EN1  
EN1  
OUT2  
OUT2  
OC2  
OUT2  
OC2  
SW2  
EN2  
GND  
SW2  
EN2  
GND  
EN1  
GND  
EN2  
GND  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
PowerPAD is a trademark of Texas Instruments.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of Texas Instruments  
standard warranty. Production processing does not necessarily include  
testing of all parameters.  
Copyright 2001, Texas Instruments Incorporated  
1
www.ti.com  
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