LTC3553 Linear Technology Corporation, LTC3553 Datasheet - Page 33

• Manufacturer Part Number: LTC3553
• Description: Micropower USB Power Manager
• Manufacturer: Linear Technology Corporation

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TYPICAL APPLICATION
4.35V TO 5.5V
USB INPUT
100k
R2
100k
R1
T
R
1.87k
PROG
PB1
C7
10μF
USB PowerPath With Li-Ion Battery (NTC Qualifi ed Charging),
19
1
7
2
6
5
3
4
20
15
16
V
NTC
PROG
HPWR
SUSP
BUCK_ON
SEQ
STBY
LDO_ON
PBSTAT
ON
BUS
and LDO Regulator Driven by Buck Regulator
LTC3553
GND
BUCK_FB
LDO_FB
V
CHRG
INLDO
V
BVIN
LDO
BAT
OUT
SW
18
14
17
12
13
8
11
10
9
L1 4.7μH
10pF
C3
C2
2.2μF
C1
10μF
+
SYSTEM LOAD
R3
Li-Ion
BATTERY
C5
2.2μF
R
2.05M
R
332k
UP2
UP1
R
649k
R
649k
LO1
LO2
3.3V
1.2V
C4
10μF
C6
4.7μF
100k
R3
I/O
CORE
PBSTAT
LDO_ON
STBY
BUCK_ON
SUSP
HPWR
EN
μC
LDO
3553 TA03
LTC3553
1.8V
MEMORY
33
3553f