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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)： | 13/30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
20
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
designing for voltage regulation (continued)
shutdown mode
In the shutdown mode, which can be controlled by bit D8 of the input serial DATA word, each of the xVCC and
xVPP outputs is forced to a high-impedance state. In this mode, the chip quiescent current is limited to 1
A
or less to conserve battery power.
standby mode
The TPS2214A and TPS2216A can be put in standby mode by pulling STBY low to conserve power during
low-power operation. In this mode, all of the power outputs (xVCC and xVPP) will have a nominal current limit
of 50 mA. STBY has an internal 150-k
pullup resistor. The output-switch status of the device must be set,
allowing the output capacitors to charge, prior to enabling the standby mode. Changing the setting of the output
switches with the device in standby mode may cause an overcurrent response to be generated.
mode
The mode pin programs the switches in either TPS2214A/ TPS2216A or TPS2206 mode. An internal 150-k
pulldown resistor is connected to the pin. Floating or pulling the mode pin low sets the switches in TPS2206
mode; pulling the mode pin high sets the switches in TPS2214A/ TPS2216A mode. In TPS2206 mode, xVPP
outputs are dependent on xVCC outputs. In TPS2214A/ TPS2216A mode, xVPP is programmed independent
of xVCC. Refer to TPS2214A/TPS2216A control-logic tables for more information.
power-supply considerations
The TPS2214A and TPS2216A have multiple pins for each of its 3.3-V and 5-V power inputs and for the switched
xVCC outputs. Any individual pin can conduct the rated input or output current. Unless all pins are connected
in parallel, the series resistance is higher than that specified, resulting in increased voltage drops and less
power. It is recommended that all input and output power pins be paralleled for optimum operation. Because
the two 12-V pins are not internally connected, they must be tied together externally.
To increase the noise immunity of the TPS2214A and TPS2216A, the power-supply inputs should be bypassed
with a 1-
F electrolytic or tantalum capacitor paralleled by a 0.047-F to 0.1-F ceramic capacitor. It is strongly
recommended that the switched outputs be bypassed with a 0.1-
F (or larger) ceramic capacitor; doing so
improves the immunity of the IC to electrostatic discharge (ESD). Care should be taken to minimize the
inductance of PCB traces between the IC and the load. High switching currents can produce large negative
voltage transients, which forward biases substrate diodes, resulting in unpredictable performance. Similarly, no
pin should be taken, or allowed to fall, below 0.3 V.
RESET and RESET inputs
To ensure that cards are in a known state after power brownouts or system initialization, the PC Cards should
be reset at the same time as the host by applying low impedance paths from xVCC and xVPP terminals to
ground. A low-impedance output state allows discharging of residual voltage remaining on PC Card filter
capacitance, permitting the system (host and PC Cards) to be powered up concurrently. The active-high RESET
or active low RESET input will close internal switches S1, S4, S7, and S11 with all other switches left open. The
TPS2214A and TPS2216A remain in the low-impedance output state until the signal is deasserted and further
data is clocked in and latched. The input serial data can not be latched during reset mode. RESET and RESET
are provided for direct compatibility with systems that use either an active-low or active-high reset voltage
supervisor. The RESET pin has an internal 150-k
pulldown resistor and the RESET pin has an internal 150-k
pullup resistor. The device will be reset automatically when powered up.
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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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