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參數(shù)資料
| 型號： | TPS2216ADBRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 3-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO30 |
| 封裝： | GREEN, PLASTIC, MO-150, SSOP-30 |
| 文件頁數(shù)： | 10/30頁 |
| 文件大?。?/td> | 554K |
| 代理商： | TPS2216ADBRG4 |
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TPS2214A, TPS2216A
DUALSLOT PC CARD POWER SWITCHES
FOR SERIAL PCMCIA CONTROLLERS
SLVS267C DECEMBER 1999 REVISED FEBRUARU 2008
18
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
overview
PC Cards were initially introduced as a means to add EEPROM (flash memory) to portable computers with
limited onboard memory. The idea of add-in cards quickly took hold; modems, wireless LANs, Global Positioning
Satellite System (GPS), multimedia, and hard-disk versions were soon available. As the number of PC Card
applications grew, the engineering community quickly recognized the need for a standard to ensure
compatibility across platforms. To this end, the PCMCIA (Personal Computer Memory Card International
Association), comprising members from leading computer, software, PC Card, and semiconductor
manufacturers, was established. One key goal was to realize the plug-and-play concept. Cards and hosts from
different vendors should be compatible or able to communicate with one another transparently.
PC Card power specification
System compatibility also means power compatibility. The most current set of specifications (PC Card Standard)
set forth by the PCMCIA committee states that power is to be transferred between the host and the card through
eight of the 68 terminals of the PC Card connector. This power interface consists of two VCC, two Vpp, and four
ground terminals. Multiple VCC and ground terminals minimize connector terminal and line resistance. The two
Vpp terminals were originally specified as separate signals, but are commonly tied together in the host to form
a single node to minimize voltage losses. Card primary power is supplied through the VCC terminals;
flash-memory programming and erase voltage is supplied through the Vpp terminals.
designing for voltage regulation
The current PCMCIA specification for output voltage regulation, VO(reg), of the 5-V output is 5% (250 mV). In
a typical PC power-system design, the power supply has an output-voltage regulation, VPS(reg), of 2% (100 mV).
Also, a voltage drop from the power supply to the PC Card will result from resistive losses, VPCB, in the PCB
traces and the PCMCIA connector. A typical design would limit the total of these resistive losses to less than
1% (50 mV) of the output voltage. Therefore, the allowable voltage drop, VDS, for the TPS2214A or TPS2216A
would be the PCMCIA voltage regulation less the power supply regulation and less the PCB and connector
resistive drops:
V
DS +
V
O(reg)
–V
PS(reg)
–V
PCB
Typically, this would leave 100 mV for the allowable voltage drop across the 5-V switch. The specification for
output voltage regulation of the 3.3-V output is 300 mV; so, using the same equation by deducting the voltage
drop percentages (2%) for power-supply regulation and PCB resistive loss (1%), the allowable voltage drop for
the 3.3-V switch is 200 mV. The voltage drop is the output current multiplied by the switch resistance of the
TPS2214A or TPS2216A. Therefore, the maximum output current, IO max, that can be delivered to the PC Card
in regulation is the allowable voltage drop across the IC, divided by the output-switch resistance.
I
O
max
+
V
DS
r
DS(on)
The xVCC outputs can deliver 1 A continuously at 5 V and 3.3 V within regulation over the operating temperature
range. The xVPP outputs of the IC can deliver 200 mA continuously.
相關(guān)PDF資料 |
PDF描述 |
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| TPS2216ADAPR | 3-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO32 |
| TPS2216IDB | 3-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO30 |
| TPS2216IDBR | 3-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO30 |
| TPS2216IDAP | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO32 |
| TPS2220BPWPRG4 | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO24 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS2216DAP | 功能描述:熱插拔功率分布 PCMCIA RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| TPS2216DAPG4 | 功能描述:熱插拔功率分布 1A Dual-Slot PC Card w/Serial Interface RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| TPS2216DAPR | 功能描述:熱插拔功率分布 1A Dual-Slot PC Card w/Serial Interface RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| TPS2216DAPRG4 | 功能描述:熱插拔功率分布 1A Dual-Slot PC Card w/Serial Interface RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| TPS2216DB | 功能描述:熱插拔功率分布 Dual PCMCIA RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
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