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LTC4121-4.2 Datasheet(PDF) 6 Page - Linear Technology

Part # LTC4121-4.2
Description  40V 400mA Synchronous Step-Down Battery Charger
Download  30 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC4121-4.2 Datasheet(HTML) 6 Page - Linear Technology

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LTC4121/LTC4121-4.2
6
4121fa
For more information www.linear.com/LTC4121
Typical perForMance characTerisTics
IN Pin Sleep/Disabled/Shutdown
Current vs Temperature
BAT Pin Sleep/Shutdown Current
vs Temperature
Feedback Pin Standby or Sleep/
Disabled Current vs Temperature
BATSNS Pin Sleep/Standby or
Shutdown/Disabled Current
vs Temperature
BAT Pin Standby/Sleep/Shutdown
Current vs Temperature
Typical VFB(REG) vs Temperature
Typical VFLOAT vs Temperature
IN Pin Standby Current
vs Temperature
TEMPERATURE (°C)
–40
4.15
4.16
4.17
4.23
4.22
4.21
4.20
4.18
4.19
4.25
4.24
–25 –10 5 20
4121 G02
35 50 65 80 95 110 125
3 UNITS TESTED
LTC4121-4.2
VIN = 5V
HIGH LIMIT
DUT1 VFLOAT
DUT2 VFLOAT
DUT3 VFLOAT
LOW LIMIT
TEMPERATURE (°C)
–40
0
60
50
40
30
10
20
90
80
70
–25 –10 5 20
4121 G04
35 50 65 80 95 110 125
SLEEP
DIS
SD
VIN = 15V
TEMPERATURE (°C)
–40
2.36
2.37
2.38
2.41
2.40
2.39
2.43
2.42
–25 –10 5 20
4121 G01
35 50 65 80 95 110 125
4 UNITS TESTED
HIGH LIMIT
DUT1
DUT2
DUT3
DUT4
LOW LIMIT
LTC4121
VIN = 15V
TEMPERATURE (°C)
–40
80
90
100
160
150
140
130
110
120
180
170
–25 –10 5 20
4121 G03
35 50 65 80 95 110 125
STANDBY FREQ HIGH
STANDBY FREQ LOW
VIN = 15V
TEMPERATURE (°C)
–40
0
6
5
4
3
1
2
8
7
–25 –10 5 20
4121 G05
35 50 65 80 95 110 125
SLEEP VBAT = 8.4V
SLEEP VBAT = 4.2V
SHUTDOWN VBAT = 8.4V
SHUTDOWN VBAT = 4.2V
LTC4121
TEMPERATURE (°C)
–40
0
50
40
30
10
20
60
–25 –10 5 20
4121 G06
35 50 65 80 95 110 125
STANDBY VFB = 2.51V
SLEEP/DIS VFB = 2.51V
LTC4121
TEMPERATURE (°C)
–40
0
6
5
4
3
1
2
8
7
–25 –10 5 20
4121 G07
35 50 65 80 95 110 125
SLEEP/STANDBY VBATSNS = 4.25V
SHUTDOWN/DIS VBATSNS = 4.25V
LTC4121-4.2
TEMPERATURE (°C)
–40
0
600
500
400
300
100
200
800
700
–25 –10 5 20
4121 G08
35 50 65 80 95 110 125
SHUTDOWN VBAT = 4.25V
STANDBY VBAT = 4.25V
SLEEP VBAT = 4.25V
LTC4121-4.2
Typical RSNS Current Limit IPEAK
vs Temperature
TEMPERATURE (°C)
–40
920
1080
1040
1020
1000
940
960
980
1120
1100
–25 –10 5 20
4121 G09
35 50 65 80 95 110 125
DUT1
DUT2
DUT3
3 UNITS TESTED
TA = 25°C, unless otherwise noted.


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