LTC3552-1 Linear Technology, LTC3552-1 Datasheet - Page 7

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

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TYPICAL PERFOR A CE CHARACTERISTICS
Switching Regulator
100
95
90
85
80
75
70
65
60
Effi ciency vs Load Current
1
V
OUT1
= 1.8V
LOAD CURRENT (mA)
10
100
95
90
85
80
75
70
65
60
Effi ciency vs Load Current
1
Burst Mode OPERATION
V
REGULATOR 1; CIRCUIT OF FIGURE 2
OUT1
V
CC
CIRCUIT OF FIGURE 2
V
V
CC
= 2.7V
OUT2
= 1.8V
100
= 4.2V
LOAD CURRENT (mA)
= 1.575V
W
V
10
CC
= 3.6V
35521 G23
U
1000
V
100
CC
= 3.6V
–0.5
–1.0
–1.5
–2.0
2.0
1.5
1.0
0.5
0
1
Load Regulation
V
35521 G26
OUT2
1000
= 1.575V
V
OUT1
LOAD CURRENT (mA)
10
= 1.8V
Burst Mode OPERATION
CIRCUIT OF FIGURE 2
100
100
95
90
85
80
75
70
65
60
V
Load Regulation
1
CC
V
REGULATOR 2; CIRCUIT OF FIGURE 2
OUT2
= 3.6V
V
CC
T
V
35521 G24
A
CC
1000
= 1.575V
= 2.7V
= 25°C Unless Otherwise Specifi ed.
= 4.2V
LOAD CURRENT (mA)
10
–0.1
–0.2
–0.3
–0.4
–0.5
0.5
0.4
0.3
0.2
0.1
V
0
CC
2.5
Line Regulation
= 3.6V
I
100
OUT
V
OUT1
= 200mA
3
= 1.8V
3.5
35521 G27
LTC3552-1
1000
V
CC
4
(V)
V
OUT2
4.5
= 1.575V
5
35521 G25
35521f
7
5.5