LV25450PNW Datasheet, PDF (4/40 Pages) Sanyo Semicon Device – For Automotive Applications DSP Tuner Front End

LV25450PNW
(2) Power on/off sequence
The power on and power off sequences for the IC must follow the order shown below.
• Power on sequence
8V system power
tPUP85
5V system power
Period when power is
applied to each pin
• Power off sequence
8V system power
5V system power
tPDN58
Parameter
Power on period (8V → 5V)
Power off period (5V → 8V)
Symbol
tPUP85
tPDN58
Conditions
min
0
0
Ratings
typ
Unit
max
100
ms
100
ms
Never apply power to the IC until all the supply voltages reach the predetermined values.
For pin D0, refer to the above section (1), Note 1, and Note 2.
Regarding voltage applied to each power pin, 8V system must always be higher than 5V system (8V system > 5V).
As long as this relationship is maintained and the power supply rise/fall time is within 100ms, there is no problem if the low voltage side power is started up first.
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