LTC4425 Linear Technology, LTC4425 Datasheet - Page 16

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

LTC4425
TYPICAL APPLICATIONS
16
12V
D1: 1N4148
D2: MBRM140
CSP1, CSP2:
1μF
V
SHDN
IN
RT
12V
75k
2.2μF
LT3505
GND
ON
BOOST
OFF
28.7k
V
SW
C
FB
69.8k
70pF
RUN
I
GND
V
LIM
IN
LT3663
12V Input to 5V Outputs with Input Voltage Monitoring
D2
0.1μF
10μH
BOOST
I
SENSE
V
OUT
SW
12V to 5V/3.3V High Peak Power Supply
FB
61.1k
11.3k
D1
59k
11k
D1
0.1μF
1.5M
68pF
V
6.8μH D1: DFLS240
OUT
22μF
μC
(5V)
R8
1.2M
10μF
CSP1, CSP2:
μC
FB
PFI
PFI_RET
PFO
EN
V
SEL
IN
5V INSTANT-ON
5V
R7
1.5M
R8
1.2M
LTC4425
V
PFI
PFI_RET
PFO
SEL
EN
GND
IN
LTC4425
PROG
GND
V
V
OUT
MID
4425 TA07
PROG
V
V
OUT
MID
FB
R6
2k
C
1F
C
1F
SP1
SP2
R6
2k
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5V
HIGH-PEAK POWER,
OR BACKUP SUPPLY
3.3V
C
1F
C
1F
SP1
SP2
4425 TA06
2.1M
1.2M
HIGH PEAK-
POWER LOAD
4425p