Datasheet

LT3507A
8
3507af
BLOCK DIAGRAM
Figure 1. LT3507A Block Diagram with Typical External Components
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
+
+
–
–
1.2V
OVLO
V
INSW
UVLO
DRIVE
V
IN4
V
OUT4
1.25µA
0.8V
TRK/SS4
FB4
BOOST
SW
FB
TRK/SS
3507A F01
V
IN
SHDN
V
INX
C
IN
C3
V
OUTX
C1
D2
D1
0.8V
80mV
ONE OF THREE STEP-DOWN REGULATORS
ERROR
AMP
I
LIMIT
CLAMP
1.25µA
L1
R1
R2
UNDERVOLTAGE
DETECTION
THERMAL
SHUTDOWN
CHANNEL
SHUTDOWN
0.9V
C1
0.4V
V
C
R
C
C
C
C
F
PGOOD
1.8V
SLOPE
CLK
S Q
R
+
SLAVE
OSC
+
+
RUN1
BIAS
V
IN1
RUN2
RUN3
RT/SYNC
GND
MASTER
OSC
INT REG
AND REF
CLK1
CLK2
CLK3