Datasheet

7
LTC1875
1875f
BLOCK DIAGRA
W
–
+
–
+
–
+
–
+
–
+
EA
I
TH
BURST
SLEEP
EN
SLEEP
0.8V
0.86V
0.6V
V
FB
SV
IN
FREQ
SHIFT
SLOPE
COMP
OSC
VCO
AND
OSC
X
BURST DEFEAT
Y
Y = “0” ONLY WHEN X IS A CONSTANT “1”
RUN/SS
SYNC/MODE PLL_LPF
S R
RS LATCH
Q
0.45V
Q
SWITCHING
LOGIC
AND
BLANKING
CIRCUIT
THERMAL
SHUTDOWN
ANTI-
SHOOT-
THROUGH
OVDET
OV
–
+
RCMP
–
+
0.74V
UVDET
PGOOD
SHUTDOWN
SGND
SOFT-START
0.8V REF
SV
IN
–
+
I
COMP
2.9Ω
PGND
7, 10 6, 11 8, 9
TOP MOSFET
BOTTOM MOSFET
1875 FD
SWN
PV
IN
SV
IN
0.8V
14
1
4
16 15
3 2
13
5, 12
SWP