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| LTC3425 Datasheet, PDF (21/24 Pages) Linear Technology – 5A, 8MHz, 4-Phase Synchronous Step-Up DC/DC Converter | |||
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LTC3425
TYPICAL APPLICATIO S
Single or Dual Cell to 3.3V Boost with Automatic Burst Mode Operation
VIN = 1.1V TO 3V
+
CIN
2.2µF
L1
L2
L3
L4
2.2µH 2.2µH 2.2µH 2.2µH
C3
0.056µF
R4
20k
RT
15k
RLIM
75k
VIN
SHDN
REFOUT
CCM
REFEN
SYNCIN
BURST
RT
ILIM
SGND
SWA
SWB
SWC
SWD
VOUTS
VOUTA
VOUTB
VOUTC
VOUTD
LTC3425
GNDA
GNDB
FB
COMP
SS
SYNCOUT
PGOOD
GNDC GNDD
COUT
4.7µF
Ã4
R5
10k
C1
22pF
+
R2 R5
511k 100k
CBULK
150µF
4V
VOUT
3.3V
1A
C2
220pF
R1
301k
CSS
0.01µF
R3
100k
PGOOD
CBULK: AVX TPSD157M004R0050
CIN: TAIYO YUDEN JMK107BJ225MA
COUT: TAIYO YUDEN JMK212BJ475MG (Ã4)
L1 TO L4: MURATA LQH4C2R2M04
3425 TA03
3425f
21
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