Datasheet

LTC3129
9
3129fa
For more information www.linear.com/LTC3129
block DiagraM
3129 BD
LDO
V
REF
START
V
REF
V
CC
V
CC
V
CC_GD
START
START
4.1V
1.175V
V
REF
+
–
SD
UVLO
+
–
–
+
+
–
–
+
THERMAL
SHUTDOWN
+
–
–
+
PWM
600mV
–7.5%
OSC
GND
SLEEP
100mV
RESET
ENABLE
I
LIM
I
ZERO
I
SENSE
20mA
I
SENSE
V
REF_GD
500mA
PGND
CLAMP
+
–
1.175V
–
+
–
+
–
+
–
+
DRIVER
DRIVER
DRIVER
DRIVER
I
SENSE
I
SENSE
DRV_C
1.1V
UV
NC
V
OUT
V
CC
V
OUT
NC
FB
DRV_D
DRV_B
DRV_A
I
SENSE
LOGIC
PGOOD
SOFT-START
+
–
MPPC
RUN
V
CC
V
IN
V
IN
BST1 SW1 SW2
D
C
A
B
BST2
PWM
SLEEP
V
IN
0.9V
1.22V
1.175V
1.175V
V
C
5M