LTC3528_15 Datasheet, PDF (4/18 Pages) Linear Technology – 1A, 1MHz Synchronous Step-Up DC/DC Converters

LTC3528/LTC3528B
TYPICAL PERFORMANCE CHARACTERISTICS (T_A = 25°C unless otherwise noted)
Efficiency vs Load Current and V_IN
for V_OUT = 3.3V (LTC3528)
100
1000
EFFICIENCY
90
100
80
70
10
60
POWER
LOSS
1
50
40
30
0.01
V_IN = 1.2V
V_IN = 1.8V
0.1
V_IN = 2.4V
V_IN = 3V _0.01
0.1
1
10
100 1000
LOAD CURRENT (mA)
3528 G02
Efficiency vs Load Current and V_IN
for V_OUT = 5V (LTC3528)
100
1000
EFFICIENCY
90
100
80
70
60
50
40
30
0.01
10
POWER
LOSS
V_IN = 1.2V ¹
V_IN = 2.4V
V_IN = 3.6V
V_IN = 4.2V _0.1
0.1
1
10
100 1000
LOAD CURRENT (mA)
3528 G03
Maximum Output Current vs V_IN
800
700
600
500
400
300
200
V_OUT = 1.8V
100
V_OUT = 3.3V
V_OUT = 5V
0
1 1.5 2 2.5 3 3.5 4 4.5
V_IN (V)
3528 G05
Minimum Load Resistance During
Start-Up vs V_IN
10000
1000
100
10
0.7
0.8
0.9
V_IN (V)
1
3528 G06
Burst Mode Threshold Current
vs V_IN
40
V_OUT = 1.8V
30
EXIT BURST
20
ENTER BURST
10
Burst Mode Threshold Current
vs V_IN
50
V_OUT = 3V
40
EXIT BURST
30
ENTER BURST
20
10
No-Load Input Current vs V_IN
(LTC3528)
130
110
90
70
V_OUT = 1.8V
50
V_OUT = 3V
V_OUT = 3.3V
V_OUT = 5V
30
10
1
2
3
V_IN (V)
4
5
3528 G04
Start-Up Delay Time vs V_IN
130
120
110
100
90
80
70
60
50
1 1.5 2 2.5 3 3.5 4 4.5
V_IN (V)
3528 G07
Burst Mode Threshold Current
vs V_IN
60
V_OUT = 3.3V
40
EXIT BURST
ENTER BURST
20
0
0
1
1.1
1.2
1.3
1.4
1.5
1
V_IN (V)
3528 G08
1.5
2
V_IN (V)
2.5
3528 G09
0
1
1.5
2
2.5
3
V_IN (V)
3528 G10
3528fd
4