Datasheet

LTC3425
21
3425f
TYPICAL APPLICATIO S
U
Single or Dual Cell to 3.3V Boost with Automatic Burst Mode Operation
L1
2.2µH
C
IN
2.2µF
C3
0.056µF
R
LIM
75k
R
T
15k
R4
20k
L2
2.2µH
L3
2.2µH
L4
2.2µH
C
BULK
: AVX TPSD157M004R0050
C
IN
: TAIYO YUDEN JMK107BJ225MA
V
IN
SWA
V
IN
= 1.1V TO 3V
SWB
LTC3425
SWC SWD
SGND
SHDN
V
OUTS
V
OUTA
V
OUTB
V
OUTC
V
OUTD
REFOUT
CCM
REFEN
SYNCIN
BURST
R
T
I
LIM
PGOOD
SYNCOUT
SS
FB
COMP
GNDA GNDB GNDC GNDD
+
C2
220pF
3425 TA03
C
OUT
4.7µF
×4
C
SS
0.01µF
R3
100k
R2
511k
R5
10k
C1
22pF
R5
100k
C
BULK
150µF
4V
PGOOD
R1
301k
V
OUT
3.3V
1A
+
C
OUT
: TAIYO YUDEN JMK212BJ475MG (×4)
L1 TO L4: MURATA LQH4C2R2M04