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LTC3455 Datasheet(PDF) 6 Page - Linear Technology

Part # LTC3455
Description  Dual DC/DC Converter with USB Power Manager and Li-Ion Battery Charger
PDF  24 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3455 Datasheet(HTML) 6 Page - Linear Technology

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LTC3455
6
3455f
TYPICAL PERFOR A CE CHARACTERISTICS
Battery Charger Regulation
Voltage
Battery Charger Recharge
Threshold
Battery Charger Trickle-Charge
Threshold
Charge Current When
Wall-Powered
Charge Current When
USB-Powered
PROG Pin Voltage
vs Charge Current
RDS(ON) for Switching Regulator
Power Switches
RDS(ON) for VMAX, USB, and HSO
PMOS Switches
TEMPERATURE (
°C)
–50
15.0
10.0
5.0
12.5
7.5
2.5
0
25
75
3455 G18
–25
0
50
100
125
VBAT = 4.2V
CHARGER OFF
TEMPERATURE (
°C)
–50
1.4
1.2
1.0
0.8
0.6
0.2
0.4
0
25
75
3455 G21
–25
0
50
100
125
HSO
USB
VMAX
VHSI = 3.3V
VUSB = 5V
VBAT = 3.6V
TEMPERATURE (
°C)
–50
0.7
0.6
0.5
0.4
0.3
0.1
0.2
0
25
75
3455 G20
–25
0
50
100
125
NMOS
PMOS
VBAT = 3.6V
TEMPERATURE (
°C)
–50
4.30
4.25
4.20
4.15
4.10
4.05
4.00
25
75
3455 G13
–25
0
50
100
125
TEMPERATURE (
°C)
–50
4.30
4.25
4.20
4.15
4.10
4.05
4.00
25
75
3455 G14
–25
0
50
100
125
TEMPERATURE (
°C)
–50
3.0
2.9
2.8
2.7
2.6
2.5
25
75
3455 G15
–25
0
50
100
125
FALLING
RISING
TEMPERATURE (
°C)
–50
600
500
400
300
200
100
0
25
75
3455 G16
–25
0
50
100
125
VBAT = 3.6V
VMAX = 4.5V
RPROG = 2.49k
THERMAL CONTROL
LOOP IN OPERATION
TEMPERATURE (
°C)
–50
600
500
400
300
200
100
0
25
75
3455 G17
–25
0
50
100
125
VBAT = 3.6V
VUSB = 5V
RPROG = 2.49k
VUSBHP = 2V
VUSBHP = 0V
THERMAL CONTROL
LOOP IN OPERATION
CHARGE CURRENT (mA)
0
1.50
1.25
1.00
0.75
0.50
0.25
0
300
3455 G19
100
200
400
500
VBAT = 3.6V
VMAX = 4.5V
RPROG = 2.49
TA = 25°C
Battery Current When
USB- or Wall-Powered



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