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LTC3554 Datasheet(PDF) 33 Page - Linear Technology

Part # LTC3554
Description  Micropower USB Power Manager with Li-Ion Charger and Two Step-Down Regulators
PDF  36 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3554 Datasheet(HTML) 33 Page - Linear Technology

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LTC3554
33
3554f
TYPICAL APPLICATION
VBUS
NTC
PROG
HPWR
SUSP
PWR_ON1
FSEL
STBY
PGOOD
PWR_ON2
PBSTAT
ON
VOUT
CHRG
BAT
BVIN
SW1
FB1
SW2
FB2
GND
Li-Ion
BATTERY
C1
10μF
R3
R1
100k
20
16
1
19
9
2
10
4
8
3
5
PB1
7
11
6
13
12
17
18
14
15
RPROG
1.87k
T
C3
10pF
C4
10μF
C2
2.2μF
RUP1
RUP2
2.05M
RLO1
649k
3.3V
LDO
1.8V
L1 4.7μH
C5
10pF
C6
10μF
332k
RLO2
649k
1.2V
L2
10μH
SYSTEM LOAD
4.35V TO 5.5V
USB INPUT
LTC3554
I/O
CORE
PBSTAT
PWR_ON2
PGOOD
STBY
FSEL
PWR_ON1
SUSP
HPWR
3554 F14
μC
MEMORY
EN
R2
100k
R2
100k
R3
100k
+
Figure 14. USB PowerPath with LI-Ion Battery (NTC Qualified Charging)



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