Datasheet

LTC3675/LTC3675-1
20
36751fc
For more information www.linear.com/LTC3675
operaTion
Figure 2a. Power-Up Using WAKE (Sequenced Power-Up, Figure 7)
Figure 2b. Power-Up Using WAKE and Power-Down Due to Hard Reset (Sequenced Power-Up, Figure 7)
Figure 2c. Power-Up Using an Enable Pin and Power-Down Due to I
2
C Generated Hard Reset
ONB
PBSTAT
BUCKS 1–4
RSTB
WAKE
SEQUENCE UP
t
2
t
1
t
3
t
4
t
5
5 sec
36751 F02b
(BUCK REGULATOR 1 IS
ENABLED VIA I
2
C, BEFORE t
3
)
ONB
(Hi-Z)
PBSTAT
(Hi-Z)
BUCK 1
EN1
RSTB
WAKE
t
2
t
1
t
4
t
3
36751 F02c
ONB
PBSTAT
(Hi-Z)
BUCKS 1–4
RSTB
WAKE
(TIED TO EN1)
5 sec
t
2
t
1
SEQUENCE UP SEQUENCE DOWN
(BUCK REGULATOR’S ENABLE IS NOT
REINFORCED BY I
2
C BEFORE t
3
)
t
3
36751 F02a