Datasheet

LTC3425
10
3425f
BLOCK DIAGRA
W
Σ
–3%
0.94V
MODE
SLEEP
V
REF
3%
SGNDGNDDGNDCGNDBGNDA
–
+
–
+
Burst Mode
CONTROL
–
+
–
+
BURST
COMP
UV
OV
ERROR
AMP
START-UP,
SOFT-START
AND
THERMAL REG
I
LIMIT
COMP
1.22V
1.086/
1.116
+
+
++
V
REF
1.22V
I
LIM
27
SS
32
BURST
14242318178721
REFOUT
15
REFEN
SHUTDOWN
9
SHDN
SYNCOUT
SYNCIN
SYNC
OFF ON
31
25
30
R
T
28
CCM
MODE CONTROL
PMOS
ENABLE
FB
0.8V
–
+
11 33
THERMAL SHDN
13
FB
12
PGOOD
16
V
OUTS
V
OUT
2.5V TO 5.25V
10
V
OUTB
5
V
OUTC
20
V
OUTA
4
V
OUTD
21
–
+
SLOPE
DIVIDER
4-PHASE
GEN
PWM LOGIC
AND
DRIVERS
ANTIRING
N
P
ZERO
I/2000
1V TO 4.5V
1 OF 4
–
–
+
OSC
IOSC
CLK
4
4
26
SWB
6
V
IN
–
+
SWA
29 3
SWC
19
SWD
22
+
Σ
4 4 4
–
+
OFF ON REFOUT