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LTC3455 Datasheet(PDF) 5 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) 5 Page - Linear Technology

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LTC3455
5
3455f
TYPICAL PERFOR A CE CHARACTERISTICS
Feedback Pins (FB1, FB2)
and AI Pin Voltage
Switching Regulator Oscillator
Frequency
Switching Regulator Current Limit
USB Pin Current Limit
VMAX Pin Current Limit
HSO Pin Current Limit
Battery Undervoltage Lockout
USB Undervoltage Lockout
WALLFB Trip Voltage
TEMPERATURE (
°C)
–50
500
400
300
200
100
0
25
75
3455 G07
–25
0
50
100
125
USBHP = 2V
USBHP = 0V
VUSB = 5V
TEMPERATURE (
°C)
–50
200
150
100
50
0
25
75
3455 G09
–25
0
50
100
125
VHSI = 3.3V
VHSO = 2.5V
TEMPERATURE (
°C)
–50
2.0
1.5
1.0
0.5
0
25
75
3455 G05
–25
0
50
100
125
FOR BOTH SWITCHERS
TEMPERATURE (
°C)
–50
1000
800
600
400
200
0
25
75
3455 G06
–25
0
50
100
125
SWITCHER 1
SWITCHER 2
TEMPERATURE (
°C)
–50
815
810
805
800
795
790
785
25
75
3455 G04
–25
0
50
100
125
FB1
AI
FB2
TEMPERATURE (
°C)
–50
5.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
0
25
75
3455 G08
–25
0
50
100
125
STARTUP
NORMAL OPERATION
TEMPERATURE (
°C)
–50
4.00
3.75
3.50
3.25
3.00
2.75
2.50
25
75
3455 G10
–25
0
50
100
125
FALLING
RISING
TEMPERATURE (
°C)
–50
4.00
3.75
3.50
3.25
3.00
2.75
2.50
25
75
3455 G11
–25
0
50
100
125
FALLING
RISING
TEMPERATURE (
°C)
–50
1.26
1.24
1.22
1.20
1.18
1.16
1.14
1.12
1.10
25
75
3455 G12
–25
0
50
100
125
FALLING
RISING



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