Datasheet

LT3640
9
3640f
block DiagraM
3640 BD
+
+
–
g
m2
V
REF
600mV
V
OUT2
V
OUT1
VC2
VC1
100k
5.5V
2µA
R2
FB1
SS1
EN/
UVLO
ENABLE
BST
SW
SW1
DRIVER
L1
L2
DA
RT
SYNC
SW2
R1
+
–
2µA 2µA
+
+
–
g
m1
2µA
+
–
2µA
+
–
A4
A8
+
–
A3
+
–
A2
+
–
A1
+
–
A7
A9
R4
FB2
50mV
PGOOD
R3
SS2
CPOR
3
3
V
REF
1.265V
RAMP
GENERATOR
POR TIMER
WATCHDOG
TIMER
OSCILLATOR
S
LOGIC
CIRCUIT
R Q
S
R Q
+
–
A6
+
–
A5
V
IN
C
IN
V
OUT1
V
OUT2
V
IN2
C
IN2
C
BST
C
OUT1
C
OUT2
D
BST
Q1
D1
EN2
CWDT
RST1 RST2 WDE WDI WDO
+
–
+
–