Datasheet

LTC3859A
14
3859af
FuncTional DiagraM
3859A BD
SWITCHING
LOGIC
INTV
CC
V
OUT3
D
B
C
B
BOOST3
TG3
SW3
BG3
PGND
SENSE3
+
SENSE3
–
C
OUT
C
IN
INTV
CC
L
R
SENSE
TOP BOT
S Q
R Q
BOTON
SHDN
+ –
SLEEP
+ –
+ –
+
–
+
–
ICMP
IR
2.8V 0.7V
SLOPE COMP
V
FB3
I
TH3
2mV
1.2V SS3 1.32V
+ – + – –
SS3
OV
C
C2
R
C
C
C
RUN3
C
SS
SHDN
SNSLO
0.5µA
11V
R
A
R
B
EA
+ –
2V
SNSLO
CLK1
PLLIN/MODE
+ –
V
FB3
1.32V
OV3
0.425V
BOOST CHANNEL 3
1µA
V
IN3