LT3507 Datasheet, PDF (8/28 Pages) Linear Technology – Triple Monolithic Step-Down Regulator with LDO

LT3507
BLOCK DIAGRAM
V_IN1
BIAS
RUN1
RUN2
RUN3
R_T/SYNC
INT REG
AND REF
MASTER
OSC
CLK1
CLK2
CLK3
THERMAL
SHUTDOWN
CHANNEL
SHUTDOWN
UNDERVOLTAGE
DETECTION
0.9V
+ ^C1
SLOPE
R
–
SQ
SLAVE
CLK
OSC
V_INSW
OVLO
1.2V
UVLO
DRIVE
SHDN
TRK/SS4
0.8V
FB4
V_IN4
V_OUT4
V_IN
V_INX
C_IN
BOOST
SW
D2
C3
L1
D1
V_OUTX
C1
V_C
C_{F RC}
C_C
PGOOD
0.4V
+
1.7V
–
I_LIMIT
+^CLAMP
ERROR
AMP
0.8V
+
80mV
FB
1.25μA
R1
R2
TRK/SS
GND
ONE OF THREE STEP-DOWN REGULATORS
3507 F01
Figure 1. LT3507 Block Diagram with Typical External Components
3507f
8