LTC3548A(RevA) View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LTC3548A Datasheet PDF : 20 Pages
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LTC3548A
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise specified.
Reference Voltage
vs Temperature
0.615
VIN = 3.6V
0.610
0.605
0.600
0.595
0.590
0.585
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3548A G08
RDS(ON) vs Input Voltage
500
450
400
MAIN
SWITCH
350
300
SYNCHRONOUS
250
SWITCH
200
12
3
4
5
VIN (V)
6
7
3548A G09
RDS(ON) vs Temperature
550
VIN = 2.7V
500
450
VIN = 4.2V VIN = 3.6V
400
350
300
250
200
150
100
–50
MAIN SWITCH
SYNCHRONOUS SWITCH
–25 0 25 50 75 100
TEMPERATURE (°C)
125 150
3548A G10
Efficiency vs Load Current
100
90 2.7V
80
4.2V
3.3V
70
60
50
40
30
20 VOUT = 2.5V
10
Burst Mode OPERATION
FIGURE 3 CIRCUIT
0
1
10
100
LOAD CURRENT (mA)
1000
3548A G11
Efficiency vs Load Current
100
90 Burst Mode OPERATION
80
70
60
PULSE-SKIPPING MODE
50
40
30
20 VIN = 3.6V
10 VOUT = 1.8V
NO LOAD ON OTHER CHANNEL
0
1
10
100
LOAD CURRENT (mA)
1000
3548A G12
Load Regulation
4
3
2
1 Burst Mode OPERATION
0 PULSE-SKIPPING MODE
–1
–2
VIN = 3.6V
–3 VOUT = 1.8V
NO LOAD ON OTHER CHANNEL
–4
1
10
100
LOAD CURRENT (mA)
1000
3548A G13
Efficiency vs Load Current
100
3.3V
90
2.7V
80
4.2V
70
60
50
40
30
20
10 VOUT = 1.2V
Burst Mode OPERATION
0
1
10
100
LOAD CURRENT (mA)
1000
3548A G14
Efficiency vs Load Current
100
90
3.3V
2.7V
80
4.2V
70
60
50
40
30
20
10 VOUT = 1.5V
Burst Mode OPERATION
0
1
10
100
LOAD CURRENT (mA)
1000
3548A G15
Line Regulation
0.5
VOUT = 1.8V
0.4 IOUT = 200mA
0.3
0.2
0.1
0
–0.1
–0.2
–0.3
–0.4
–0.5
2
3
4
VIN (V)
5
6
3548A G16
3548afa
5
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