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LTC3425 Datasheet(Fiches technique) 19 Page - Linear Technology

Numéro de pièce LTC3425
Description  5A, 8MHz, 4-Phase Synchronous Step-Up DC/DC Converter
Télécharger  24 Pages
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Fabricant  LINER [Linear Technology]
Site Internet  http://www.linear.com
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 19 page
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LTC3425
19
3425f
APPLICATIO S I FOR ATIO
L1
2.7
µH
CIN
2.2
µF
RLIM
75k
RT
12.1k
L2
2.7
µH
L3
2.7
µH
L4
2.7
µH
D4
CIN: TAIYO YUDEN JMK107BJ225MA
CS: TAIYO YUDEN LMK107BJ474KA
COUT: TAIYO YUDEN JMK212BJ475MG (×4)
CBULK: AVX TPSD157M006R0050
VIN
VOUT
SWA
VIN
3.3V
SWB
LTC3425
SWC
SWD
SGND
SHDN
VOUTS
VOUTA
VOUTB
VOUTC
VOUTD
REFOUT
CCM
REFEN
SYNCIN
BURST
RT
ILIM
PGOOD
SYNCOUT
SS
FB
COMP
GNDA
GNDB
GNDC
GNDD
C2
220pF
3425 F07
COUT
4.7
µF
×4
CSS
0.01
µF
CS
0.47
µF
×2
Q1
CBULK
150
µF
6.3V
R3
100k
R2
309k
R4
100k
PGOOD
R1
100k
VOUT
5V
2.5A
+
D3
D2
D1
D1 TO D4: MOTOROLA MBR0520L
L1 TO L4: TDK RLF5018T-2R7M1R8
Q1: ZETEX ZXM61P02F
L1
2.7
µH
CIN
2.2
µF
RLIM
75k
RT
12.1k
L2
2.7
µH
L3
2.7
µH
L4
2.7
µH
D4
CIN: TAIYO YUDEN JMK107BJ225MA
COUT: TAIYO YUDEN JMK212BJ475MG (×4)
CBULK: AVX TPSD157M006R0050
VIN
VOUT
SWA
VIN
3.3V
SWB
LTC3425
SWC
SWD
SGND
SHDN
VOUTS
VOUTA
VOUTB
VOUTC
VOUTD
REFOUT
CCM
REFEN
SYNCIN
BURST
RT
ILIM
PGOOD
SYNCOUT
SS
FB
COMP
GNDA
GNDB
GNDC
GNDD
C2
220pF
3425 F08
COUT
4.7
µF
×4
CSS
0.01
µF
CBULK
150
µF
6.3V
R3
100k
R2
309k
R4
100k
PGOOD
R1
100k
VOUT
5V
2.5A
+
D3
D2
D1
D1 TO D4: MOTOROLA MBR0520LT1
L1 TO L4: TDK RLF5018T-2R7M1R8
Figure 7. Application Circuit for VOUT > 4.3V with Inrush Limiting and Output Disconnect
Figure 8. Application Circuit for VOUT > 4.3V When Inrush Limiting and Output Disconnect are Not Required




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