LTC3553 Linear Technology Corporation, LTC3553 Datasheet - Page 34

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

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LTC3553
TYPICAL APPLICATION
34
4.35V TO 5.5V
USB INPUT
3-Cell Alkaline/Lithium With PowerPath (Charger Disabled)
R
1.87k
PROG
PB1
C3
10μF
19
1
5
2
6
7
3
4
20
15
16
U1
V
NTC
PROG
HPWR
SUSP
LDO_ON
SEQ
STBY
BUCK_ON
PBSTAT
ON
BUS
LTC3553
GND
BUCK_FB
LDO_FB
V
CHRG
INLDO
V
BVIN
LDO
BAT
OUT
SW
18
14
17
12
11
10
9
13
8
+
10μH
10pF
L1
100k
C5
R4
SYSTEM LOAD
3 CELL
ALKALINE
OR LITHIUM
C1
10μF
1M
R
590k
R
UP1
R
464k
UP2
R
464k
C2
2.2μF
LO1
LO2
2.5V
1.8V
100k
R3
C4
4.7μF
C6
10μF
U2
I/O
CORE
PBSTAT
STBY
EN
SUSP
HPWR
μC
3553 TA04
3553f