TPS2148 用于 USB 外设的 3.3V LDO + 双路开关，工作态低电平启用
TPS2148 描述
The TPS2148 incorporates two power distribution switches and an LDO in one small package, providing a USB peripheral power management solution that saves up to 60% in board space over typical implementations.
The TPS2148 meets USB 2.0 bus-powered peripheral requirements. An integrated LDO regulates the 5-V bus power down to 3.3 V for the USB controller, and a MOSFET switch that is internally connected to the output of the LDO simplifies meeting the suspend and enumeration current requirements imposed by the USB specification.
A second switch is available to support a downstream port, stage power to a second voltage regulator, or disable power to selected circuitry in power-save modes.
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.
|
TPS2145 |
TPS2147 |
TPS2148 |
TPS2149 |
TPS2155 |
TPS2158 |
TPS2159 |
| Number of FETs |
2 |
2 |
2 |
2 |
2 |
2 |
2 |
| Vin(Min)(V) |
2.9 |
2.9 |
2.9 |
2.9 |
2.9 |
2.9 |
2.9 |
| Vin(Max)(V) |
5.5 |
5.5 |
5.5 |
5.5 |
5.5 |
5.5 |
5.5 |
| Switch Enable |
L |
L |
L |
L |
H |
H |
H |
| rDS(on) per FET, Bus Power(Typ)(mOhms) |
340 |
340 |
340 |
340 |
340 |
340 |
340 |
| Application |
DSP, PDA |
DSP, PDA |
USB peripheral |
USB 2-port hub |
DSP, PDA |
USB peripheral |
USB 2-port hub |
| Switch Current Limit, Bus Power(Min)(A) |
0.2 |
0.2 |
0.2 |
0.2 |
0.2 |
0.2 |
0.2 |
| LDO Output Range(V) |
3.3 |
3.3 |
3.3 |
3.3 |
3.3 |
3.3 |
3.3 |
| LDO Output Current(mA) |
200 |
200 |
200 |
200 |
200 |
200 |
200 |
| Ports(Max) |
2 |
2 |
2 |
2 |
2 |
2 |
2 |
| Pin/Package |
14HTSSOP |
10MSOP-PowerPAD |
8MSOP-PowerPAD |
8MSOP-PowerPAD |
14HTSSOP |
8MSOP-PowerPAD |
8MSOP-PowerPAD |
TPS2148 特性
- Complete Power Management Solution for USB Bus-Powered Peripherals
- 3.3-V 200 mA Low-Dropout Voltage Regulator With Enable
- 3.3-V 340-mOhm (Typ) High-Side MOSFET
- 5-V 340-mOhm (Typ) High-Side MOSFET
- Independent Thermal- and Short-Circuit Protection for LDO and Each Switch
- 2.9-V to 5.5-V Operating Range
- CMOS- and TTL-Compatible Enable Inputs
- 75-uA (Typ) Supply Current
- Available in 8-Pin MSOP (PowerPADTM)
- -40°C to 85°C Ambient Temperature Range
- APPLICATIONS
- USB Peripherals
- Digital Cameras
- Zip Drives
- Speakers and Headsets
TPS2148 芯片订购指南
TPS2148 质量与无铅数据
| 器件 |
环保计划* |
铅/焊球涂层 |
MSL 等级/回流焊峰 |
环保信息与无铅 (Pb-free) |
DPPM / MTBF / FIT 率 |
| TPS2148IDGN |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
TPS2148IDGN |
TPS2148IDGN |
| TPS2148IDGNG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
TPS2148IDGNG4 |
TPS2148IDGNG4 |
TPS2148 应用技术支持与电子电路设计开发资源下载
- TPS2148 数据资料 dataSheet 下载.PDF
- TI 德州仪器USB 功率控制器产品选型与价格 . xls
- PowerPADTM Thermally Enhanced Package
(PDF 1040 KB)
- 全面认识开关型电源中的BUCK-BOOST功率级 (Rev. A)
(PDF 2206 KB)
- Shelf-Life Evaluation of Lead-Free Component Finishes (PDF 1305 KB)
- Comparing Performance of Current Ramp and Voltage Ramp Hot Swap Controller ICs
(PDF 356 KB)
- DN-103 Controlling a -5V Rail Using TPS2148 +3V to +8V Hot-Swap Power Manager
(PDF 37 KB)
- PowerPADTM Made Easy (PDF 57 KB)
- 标准线性产品交叉参考 (Rev. D)
(PDF 1058 KB)
- 模数规格和性能特性术语表 (Rev. A) (PDF 1993 KB)
- 所选封装材料的热学和电学性质 (PDF 645 KB)
- 高速数据转换 (PDF 1967 KB)
TPS2148 相关工具
| 名称 |
型号 |
公司 |
工具/软件类型 |
| TPS2148 估模块 |
TPS2148EVM |
Texas Instruments |
开发电路板/EVM |