LTC3554 LINER [Linear Technology], LTC3554 Datasheet - Page 34
LTC3554
Manufacturer Part Number
LTC3554
Description
Micropower USB Power Manager with Li-Ion Charger and Two Step-Down Regulators
Manufacturer
LINER [Linear Technology]
Datasheet
1.LTC3554.pdf
(36 pages)
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LTC3554
TYPICAL APPLICATION
34
4.35V TO 5.5V
USB INPUT
Figure 15. 3-Cell Alkaline/Lithium with PowerPath (Charger Disabled)
R
1.87k
PROG
PB1
19
10
1
9
2
4
8
3
5
20
15
16
U1
V
NTC
PROG
HPWR
SUSP
PWR_ON1
FSEL
STBY
PGOOD
PWR_ON2
PBSTAT
ON
BUS
LTC3554
GND
CHRG
V
BVIN
SW1
SW2
BAT
OUT
FB1
FB2
18
14
17
12
13
6
11
7
L1 10μH
10μH
10pF
10pF
L2
100k
C3
C5
C2
2.2μF
R4
+
SYSTEM LOAD
3 CELL
ALKALINE
OR LITHIUM
C1
10μF
100k
R2
1M
R
590k
R
UP2
UP1
R
464k
R
464k
LO1
LO2
2.5V
1.8V
100k
R3
C4
10μF
C6
10μF
U2
I/O
CORE
PBSTAT
PGOOD
STBY
FSEL
EN
SUSP
HPWR
μC
3554 F15
3554f
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