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參數(shù)資料
| 型號： | TPS2148IDGNR |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Analog IC |
| 中文描述： | 模擬IC |
| 文件頁數(shù)： | 1/18頁 |
| 文件大小： | 251K |
| 代理商： | TPS2148IDGNR |
TPS2148
TPS2158
SLVS373 – AUGUST 2001
3.3-V LDO AND DUAL SWITCH
FOR USB PERIPHERAL POWER MANAGEMENT
1
www.ti.com
FEATURES
Complete Power Management Solution for
USB Bus-Powered Peripherals
3.3-V 200 mA Low-Dropout Voltage Regulator
With Enable
3.3-V 340-m
(Typ) High-Side MOSFET
5-V 340-m
(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-
μ
A (Typ) Supply Current
Available in 8-Pin MSOP (PowerPAD
)
–40
°
C to 85
°
C Ambient Temperature Range
APPLICATIONS
USB Peripherals
– Digital Cameras
– Zip Drives
– Speakers and Headsets
DESCRIPTION
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. The switches and the LDO are designed with
controlled rise times and fall times to minimize current
surges.
The TPS2148 has active-low enables while the
TPS2158 has active-high enables.
LDO and dual switch family selection guide and schematics
LDO
LDO_OUT
LDO_ADJ
OC1
OUT1
OUT2
OC2
VIN/SW1
LDO_EN
EN1
SW2
EN2
GND
TPS2145/55
TSSOP–14
LDO
OC1
OC2
EN1
SW2
EN2
GND
TPS2147/57
MSOP–10
LDO
EN2
EN1
GND
TPS2148/58
MSOP–8
LDO
OC
EN1
EN2
GND
TPS2149/59
MSOP–8
VIN/SW1
LDO_OUT
OUT1
OUT2
VIN/SW1
LDO_EN
LDO_OUT
OUT2
OUT1
VIN
LDO_OUT
OUT1
OUT2
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.
PowerPAD is a trademark of Texas Instruments.
Copyright
2001, Texas Instruments Incorporated
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.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS2149IDGN | 功能描述:電源開關(guān) IC - USB 3.3V LDO + Dual Switch RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube |
| TPS2149IDGN | 制造商:Texas Instruments 功能描述:IC 3.3V LDO/DUAL SWITCH 8-MSOP 制造商:Texas Instruments 功能描述:IC, 3.3V LDO/DUAL SWITCH 8-MSOP |
| TPS2149IDGNG4 | 功能描述:電源開關(guān) IC - USB 3.3V LDO + Dual Switch RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube |
| TPS2149IDGNR | 功能描述:電源開關(guān) IC - USB 3.3V LDO + Dual Switch RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube |
| TPS2149IDGNRG4 | 功能描述:電源開關(guān) IC - USB 3.3V LDO + Dual Switch RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube |
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