LTC4425 Linear Technology, LTC4425 Datasheet - Page 15

• Manufacturer Part Number: LTC4425
• Description: Linear SuperCap Charger
• Manufacturer: Linear Technology

TYPICAL APPLICATIONS
USB
L1: COILCRAFT LPS4018-332MLC
M1: SILICONIX Si2333
R2: VISHAY-DALE NTHS0603N011-N1003F
C1, C3: MURATA GRM21BR61A106KE19
C2: MURATA GRM188R71C104KA01
CSC: CAP-XX HS203F
μC
C1
10μF
0805
5V
1.5M
1.2M
R1
100k
R2
100k
V
PFI
PFI_RET
PFO
SEL
EN
IN
μC
LTC4425
C2
0.1μF
0603
GND
8.2Ω
R5
V
CHRG
NTC
D0
D1
D2
BUS
CLPROG
PROG
V
V
OUT
MID
FB
R3
2.94k
High Current USB Charging with Power Path Control
V
IN
PROG
2k
LTC4088
R4
2k
C
0.55F
HS203F
3.3V Peak-Power/Back-up Supply
SC
C/X
10μF
SW
≈5V
LDO3V3
GND
OFF
GATE
V
BAT
OUT
3.3μH
33.2k
L1
ON
+
SGND
SW1
PV
V
RUN/SS
R
M1
IN
T
IN
LI-Ion
LTC3533
2.2μH
C3
10μF
0805
BURST
PV
PGND
V
SW2
INSTANT-ON
OUT
OUT
V
FB
μC
C
5V
R7
1.5M
R8
1.2M
200k
4.7pF
107k
V
PFI
PFI_RET
PFO
SEL
EN
IN
330pF
0.1μF
LTC4425
GND
340k
200k
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PROG
V
V
OUT
MID
FB
6.49k
4425 TA05a
47pF
LTC4425
V
IN
R6
2k
4425 TA05
100μF
V
3.3V
1.5A
OUT
C
0.55F
HS203F
SC
LOAD
15
4425p