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Número de pieza
componentes Descripción
LTC3455EUF Ver la hoja de datos (PDF) - Linear Technology
Número de pieza
componentes Descripción
Fabricante
LTC3455EUF
Dual DC/DC Converter with USB Power Manager and Li-Ion Battery Charger
Linear Technology
LTC3455EUF Datasheet PDF : 28 Pages
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BLOCK DIAGRAM
LTC3455/LTC3455-1
USB
5V
1Ω
4.7μF
USB
8
5.6V
USB
CONTROLLER
SUSPEND
6
USBHP
5
V
MAX
1k
0.1μF
CHRG
4
TIMER
3
PROG
2
2.49k
GND
25
V
BAT
3.3V to 4.2V
4.7μF
2.43M
V
BAT
9
AI
16
806k
USB POWER MANAGER
1 1000
–
REF
+
R
4R
3.9V
–
+
BATTERY CHARGER
1 1000
–
1.23V
+
2.41R
+
CHARGE
CONTROL
R
LBO
ON/OFF
AO
17
806k
1.8V
ON
24
PBSTAT
23
806k
1.8V
–
+
0.8V
V
BAT
+
UVLO
3.0V
–
μC
PWRON
22
ON2
19
RST
20
MODE
21
HSON
15
200ms RESET PULSE
BURST MODE ENABLE
EXTPWR
EXTPWR
3.32k
+
WALLFB
11
–
1.23V
1.24k
BATTERY PMOS SWITCH
10
V
MAX
WALL 5V
1Ω
4.7μF
V
MAX
10μF
SWITCHER 1
PWM
DRIVER
ENABLE
–
+
0.8V
SW1
4.7μH
7
FB1
1
100k
80.6k
1.8V
10μF
SWITCHER 2
PWM
DRIVER
ENABLE
–
+
0.8V
SW2
4.7μH
12
FB2
18
249k
80.6k
HOT SWAP
ENABLE
HSI
13
HSO
14
3455 BD01
3.3V
10μF
3.3V, HS
1μF
3455fc
9
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