Datasheet

LTC3569
13
3569fe
For more information www.linear.com/LTC3569
operaTion
Figure 3. V
REF
and ENx Timing Diagram
3569 TD
15
13
15
15
14
13
14
15
9
15
15
14
13
12
11
10
9
COUNTER INCREMENTS ON
FALLING EDGES OF EN
COUNTER RESETS TO FULL-SCALE IF EN
STAYS HIGH FOR MORE THAN 125µs
COUNTER RESETS TO FULL-SCALE IF EN
STAYS LOW FOR MORE THAN 170µs
DAC LOADS COUNTER VALUE IF
EN STAYS HIGH FOR MORE THAN 125µs
SOFT-START
BUCK ON
COUNT13 = 750mV
COUNT9
= 650mV
COUNT15 = 800mV
SOFT-START
0mV0mV
V
REF
V
REF
COUNTER
(15:0)
DAC
(15:0)
BUCK OFFBUCK OFF
SHUTDOWN
BUCK ON
EN
60ns < WIDTH < 55µs
t
EN
= 125µs (TYP)
t
EN
t
OFF
170µs (TYP)
t
EN