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LTC3552 Datasheet(PDF) 7 Page - Linear Technology

Part # LTC3552
Description  Standalone Linear Li-Ion Battery Charger and Dual Synchronous Buck Converter
PDF  24 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3552 Datasheet(HTML) 7 Page - Linear Technology

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LTC3552
7
3552f
3552 G20
0.615
0.610
0.605
0.600
0.595
0.590
0.585
TEMPERATURE (
°C)
–50
25
75
–25
0
50
100
125
VCC = 3.6V
VCC (V)
1
500
450
400
350
300
250
200
46
3552 G21
2
3
57
MAIN
SWITCH
SYNCHRONOUS
SWITCH
JUNCTION TEMPERATURE (
°C)
–50
550
500
450
400
350
300
250
200
150
100
25
75
3552 G22
–25
0
50
100
150
125
MAIN SWITCH
SYNCHRONOUS SWITCH
VCC = 3.6V
VCC = 4.2V
VCC = 2.7V
Reference Voltage
vs Temperature
RDS(ON) vs VCC
RDS(ON) vs Junction Temperature
Efficiency vs Load Current
Efficiency vs Load Current
TYPICAL PERFOR A CE CHARACTERISTICS
3552 G26
LOAD CURRENT (mA)
1
100
90
80
70
60
50
40
10
100
1000
VCC = 3.6V
VCC = 2.7V
VCC = 4.2V
VOUT = 2.5V, REGULATOR 1
Burst Mode OPERATION, MODE/SYNC = 3.6V
NO LOAD ON OTHER REGULATOR
CIRCUIT OF FIGURE 2
3552 G27
LOAD CURRENT (mA)
1
100
95
90
85
80
75
70
65
60
10
100
1000
VCC = 2.7V
VCC = 4.2V
VOUT = 1.5V, REGULATOR 1
Burst Mode OPERATION, MODE/SYNC = 3.6V
NO LOAD ON OTHER REGULATOR
CIRCUIT OF FIGURE 2
VCC = 3.6V
Switching Regulator
TA = 25°C Unless Otherwise Specified.
Efficiency vs Load Current
Load Regulation
3552 G23
LOAD CURRENT (mA)
1
100
95
90
85
80
75
70
65
60
10
100
1000
Burst Mode OPERATION
PULSE-SKIPPING MODE
VCC = 3.6V, VOUT = 1.8V
NO LOAD ON OTHER
REGULATOR; REGULATOR 1;
CIRCUIT OF FIGURE 2
3552 G24
LOAD CURRENT (mA)
1
2.0
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
10
100
1000
Burst Mode OPERATION
PULSE-SKIPPING MODE
VCC = 3.6V, VOUT = 1.8V
NO LOAD ON OTHER REGULATOR
REGULATOR 1; CIRCUIT OF FIGURE 2
Line Regulation
3552 G25
VCC (V)
2
0.5
0.4
0.3
0.2
0.1
0
–0.1
–0.2
–0.3
–0.4
–0.5
4
6
35
VOUT = 1.8V
IOUT = 200mA
Efficiency vs Load Current
3552 G28
LOAD CURRENT (mA)
1
100
95
90
85
80
75
70
65
60
10
100
1000
VCC = 2.7V
VCC = 4.2V
VCC = 3.6V
VOUT = 1.2V, REGULATOR 1
Burst Mode OPERATION, MODE/SYNC = 3.6V
NO LOAD ON OTHER REGULATOR
CIRCUIT OF FIGURE 2



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