Datasheet

LTC3721-1
8
sn37211 37211fs
BLOCK DIAGRA S
W
RQ S
Q
T
1.5A SINK 1A SOURCE
DRVA
Q
RQ
S
DRVB
1.5A SINK 1A SOURCE
FAULT
LOGIC
OSCILLATOR
SLOPE
COMPENSATOR
PULSE-BY-PULSE CURRENT LIMIT
300mV
37211 BD01
C
T
DPRG
PULSE WIDTH MODULATOR
ERROR AMPLIFIER
+
–
SHUTDOWN CURRENT LIMIT
V
REF
13µA
50k
14.9k
600mV
–
+
–
+
BLANK
R
LEB
CS SS
COMP
1.2V
FB
+
–
SYSTEM UVLO
V
CC
V
CC
GOOD
10µA
5V
–
+
+ –
650mV
UVLO
REF, LDO
1.2V
5V
REF GOOD
V
REF
V
CC
UVLO
10.25V “ON”
6V “OFF”
V
CC
GND
–
+
LTC3721-1 Block Diagram