Datasheet

LTC3852
11
3852f
FUNCTIONAL DIAGRAM
–
+
–
+
–
+
2µA
SLOPE COMPENSATION
UVLO
OSC
S
RQ
5k
RUN
SWITCH
LOGIC
AND
ANTI-
SHOOT
THROUGH
BG
ON
PULSE SKIP
0.8V
OV
1
100k
1.25V0.64V
R
C
INTV
CC
I
THB
I
CMP
C
C1
EA
SS
R1
0.88V
R2
GND2
SW
TG
C
B
V
IN2
SLEEP
BOOST
BURSTEN
–
+
–
+
UV
OV
C
INTVCC
V
OUT
C
OUT
M2
M1
L1
–
+
I
REV
D
B
MODE/PLLIN
BUCK REGULATOR
100k
SENSE
+
SENSE
–
0.8V
REF
TRACK/SS
0.4V
–
+
V
FB
FREQ/
PLLFLTR
PLL-SYNC
5V REG
MODE/SYNC
DETECT
+
1µA
C
SS
+
PGOOD
–
+
0.72V
V
IN
38V MAX
–
+
V
PUMP
RUN
C
PUMP
V
IN1
V
IN1
2.7V to 5.5V
C
IN
SHDN
C
+
C
–
CHARGE
PUMP
1.2MHz
OSCILLATO
CHARGE PUMP
R
GND1
ON/OFF
C
FLY
3852 FD
INTV
CC
I
TH
V
IN2
FAULT
LOGIC
RUN
–
+
SOFT-START
AND
SWITCH CONTROL