LTC3552-1 Linear Technology, LTC3552-1 Datasheet - Page 4

• Manufacturer Part Number: LTC3552-1
• Description: Standalone Linear Li-Ion Battery Charger and Dual Synchronous Buck Converter
• Manufacturer: Linear Technology

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LTC3552-1
TYPICAL PERFOR A CE CHARACTERISTICS
Battery Charger
4
1.015
1.010
1.005
1.000
0.995
0.990
0.985
4.26
4.24
4.22
4.20
4.18
4.16
4.14
4.12
4.10
30
25
10
20
15
0
5
4
0
0
PROG Pin Voltage vs Supply
Voltage (Constant-Current Mode)
Regulated Output (Float) Voltage
vs Charge Current
⎯ C ⎯ H ⎯ R ⎯ G Pin I-V Curve
(Pull-Down State)
V
R
V
R
IN
PROG
BAT
PROG
100
4.5
= 5V
1
= 4V
T
= 1.25k
A
= 10k
= –40°C
5
200
2
5.5
300
V
I
3
BAT
CHRG
V
IN
6
(mA)
(V)
400
4
(V)
6.5
T
T
A
A
500
= 25°C
= 90°C
5
W
V
V
7
IN
BAT
600
= 5V
6
= 4V
7.5
35521 G01
35521 G07
35521 G04
U
700
7
8
1.0000
1.0100
1.0075
1.0050
1.0025
0.9975
0.9950
0.9925
0.9900
4.215
4.210
4.205
4.200
4.195
4.190
4.185
30
25
10
20
15
5
0
–50
–50
⎯ P ⎯ W ⎯ R Pin I-V Curve
(Pull-Down State)
0
PROG Pin Voltage
vs Temperature
Regulated Output (Float) Voltage
vs Temperature
V
V
R
V
R
IN
BAT
PROG
IN
PROG
= 5V
= 5V
–25
1
–25
= V
T
= 10k
= 10k
A
BSENSE
= –40°C
2
TEMPERATURE (°C)
TEMPERATURE (°C)
0
0
= 4V
V
3
PWR
25
25
(V)
4
T
T
50
50
A
A
= 25°C
= 90°C
5
V
V
IN
BAT
75
75
= 5V
6
= 4V
T
35521 G02
A
35521 G08
35521 G05
= 25°C Unless Otherwise Specifi ed.
100
100
7
4.215
4.210
4.190
4.185
4.205
4.200
4.195
600
500
100
400
300
200
600
500
400
300
200
100
0
0
2.4
4
Charge Current
vs PROG Pin Voltage
Regulated Output (Float) Voltage
vs Supply Voltage
Charge Current vs Battery Voltage
0
V
R
R
V
θ
R
R
IN
PROG
TERM
IN
JA
PROG
PROG
4.5
2.7
= 5V
= 5V
= 40°C/W
0.2
= 2k
= 2k
= 2k
= 10k
5
3
0.4
5.5
V
3.3
V
PROG
V
BAT
IN
0.6
6
(V)
3.6
(V)
(V)
6.5
0.8
3.9
7
4.2
1
7.5
35521 G03
35521 G06
35521 G09
35521f
1.2
4.5
8