Datasheet

LTC3125
7
3125fa
BLOCK DIAGRAM
6
9
8
I
PK
COMP
I
CLMP
COMP
I
ZERO
COMP
SLOPE COMP
V
REF
R2
C
OUT
V
OUT
V
OUT
I
CLMP
CLK
V
REF
AVERAGING
CIRCUIT
I
AVG
ERROR
AMP
EXPOSED
PAD
V
REF
GOOD
I
ZERO
WAKETSD
I
PK
+
–
+
–
LOGIC
V
SEL
ANTI-RING
GATE DRIVE
AND
ANTI-CROSS
CONDUCTION
MODE
CONTROL
V
CLAMP
THERMAL
SHUTDOWN
CLK
OSC
V
BG
V
BEST
R
SENSE
V
B
V
SEL
SW
L1
5
CS
4
V
IN
SHUTDOWN
INPUT CURRENT
SENSE AMP
V
REF
SD
SHDN
PROG
4M
SOFT START
3125 BD
+
–
WELL-SWITCH
+
–
7
FB
2
R1
R
PROG
+
–
g
m
3
+
–
C
IN
V
IN
1
GND
g
m