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TPS22933ARSER датащи(PDF) 8 Page - Texas Instruments

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номер детали TPS22933ARSER
подробное описание детали  Small, Triple-Input Power Multiplexer with Auto-Select and Low Drop-out Voltage Regulator
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производитель  TI1 [Texas Instruments]
домашняя страница  http://www.ti.com
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TPS22933ARSER датащи(HTML) 8 Page - Texas Instruments

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TPS22933A
USB Port
DC Input
MSP430C3xx
µC
Switched
Load
Battery
USB
DC_IN
BAT
LOUT
EN
VOUT
GND
CAP
TPS22933A
USB Port
DC Input
Battery
USB
DC_IN
BAT
LOUT
EN
VOUT
GND
CAP
Power
Multiplexer
Output
TPS22933
SLVSB34
– OCTOBER 2011
www.ti.com
APPLICATION EXAMPLES
Below are two diagrams of typical applications for the TPS22933A. In all cases, the unused power inputs can be
left floating or tied to ground. The EN pin must not be left floating.
Figure 4 shows three power inputs multiplexed to source the LDO. The LDO always on output (LOUT) is tied to
an MSP430. The MSP430 then determines when to enable the switched output (VOUT) by driving the EN pin.
Figure 5 shows three power inputs multiplexed to source only through the CAP pin. In this case, the LDO outputs
are not used (EN is tied low). The highest of the inputs is chosen to drive the voltage at the CAP pin.
Note that these two applications are not mutually exclusive. An application could use the CAP pin as a power
output and use one or both of the LDO outputs.
Figure 4. Application Example 1
Figure 5. Application Example 2
8
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© 2011, Texas Instruments Incorporated
Product Folder Link(s) :TPS22933


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