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13892 数据表(PDF) 75 Page - Freescale Semiconductor, Inc

部件名 13892
功能描述   Power Management and User Interface IC
PDF  161 Pages
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制造商  FREESCALE [Freescale Semiconductor, Inc]
网页  http://www.freescale.com
标志 FREESCALE - Freescale Semiconductor, Inc

13892 数据表(HTML) 75 Page - Freescale Semiconductor, Inc

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Analog Integrated Circuit Device Data
Freescale Semiconductor
75
13892
FUNCTIONAL DEVICE OPERATION
SUPPLIES
Since the startup default values of the buck switchers are dependent on the state of the PUMS pin, the SWxHI bit settings will
likewise be determined by the PUMS pin. The settings are aligned to the likely application ranges for use cases as given in the
Defaults tables in Power Control System. The following tables define the SWxHI bit states after a startup event is completed, but
can be reconfigured via the SPI if desired, if an alternate range is needed. Care should be taken when changing SWxHI bit to
avoid unintended jumps in the switcher output. The SWxHI setting applies to Normal, Standby, and DVS set points for the
corresponding switcher.
Note that the following efficiency curves were measured with the MC13892 in a socket.
29
11101
1.325
1.825
30
11110
1.350
1.850
31
11111
1.375
1.850
59.
Output range not available for SW1. SW1 output range is 0.600-1.375, therefore SW1HI = 1 does not apply to SW1. The SW1HI bit
should always be set to 0.
Table 48. SWxHI States for Power Up Defaults
PUMS1
Ground
Open
VCOREDIG
VCORE
Ground
Open
PUMS2
Open
Open
Open
Open
Ground
Ground
SW1HI
0
0
0
0
0
0
SW2HI
0
0
0
0
1
1
SW3HI
0
0
0
0
1
1
SW4HI
1
1
1
1
1
1
Table 47. Buck Switchers (SW1, 2, 3, 4) Output Voltage Programmability
Set point
SWx[4:0]
SWx Output, SWxHI = 0 (Volts)
SWx Output (59), SWxHI = 1 (Volts)



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