LC75055PE(2014) Просмотр технического описания (PDF) - ON Semiconductor
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LC75055PE Datasheet PDF : 26 Pages
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Power On/Off Timing
(1) Power supply ON timing order
LC75055PE
3.3V Power supply
(1.5V Power *1)
PWDB
RSTB
BUSYO
tpup3315
0ms (min)
1ms
After BUSYO=Low, command acceptable
100 ms (max)
max time from RSTB=“H” to BUSY=“L”
*1) When a 1.5V power supply is applied in external power source directly, Please refer to this sequential order.
RSTB signal should be set in Low level more than 1ms from either late power supply turned on or positive edge of the
PWDB signal.. In addition, the reset time is less than 100msec.
When a 1.5V power supply is produced using a onchip 1.5V reference level and external FET, It is recommended that
3.3V power supply of LC75055 (DVDD33) and 3.3V power of external FET are turned on the following order.
3.3V (DVDD33)
3.3V (FET)
tpup3333
Parameter
Power on (3.3V 1.5V)
Power on (3.3V 3.3V)
(2) Power supply OFF timing order
Symbol
tpup3315
tpup3333
Conditions
Min
Typ
Max
Unit
0
100
msec
0
3.3V power supply
(1.5V Power *2)
tpdn1533
*2) When a 1.5V power supply is applied in external power source directly, Please refer to this sequential order.
Parameter
Power off (1.5V 3.3V)
Symbol
tpdn1533
Conditions
Min
Typ
Max
Unit
0
100
msec
In addition, 5V-Tolerant input pin of LC75055 can input 3.6V voltage even if in power supply OFF condition.
Furthermore, it can be applied to 5V after regular voltage was applied to each power supply. Be careful because the I/O
direction of the pin is not decided before a 1.5V power supply being input.
In the voltage of each power supply, the voltage of the 3.3V power supply must be higher than the voltage of the 1.5V
power supply.
No.A2168-15/26
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