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LTC3548AIDDPBF Datasheet(PDF) 5 Page - Linear Technology

Part # LTC3548AIDDPBF
Description  Dual Synchronous 400mA/800mA, 2.25MHz Step-Down DC/DC Regulator
PDF  20 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3548AIDDPBF Datasheet(HTML) 5 Page - Linear Technology

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LTC3548A
5
3548af
TYPICAL PERFORMANCE CHARACTERISTICS
Reference Voltage
vs Temperature
RDS(ON) vs Input Voltage
RDS(ON) vs Temperature
Efficiency vs Load Current
Efficiency vs Load Current
Load Regulation
Efficiency vs Load Current
Efficiency vs Load Current
Line Regulation
TA = 25°C unless otherwise specified.
0.615
0.610
0.605
0.600
0.595
0.590
0.585
TEMPERATURE (°C)
–50
25
75
3548A G08
–25
0
50
100
125
VIN = 3.6V
VIN (V)
1
500
450
400
350
300
250
200
46
3548A G09
2
3
57
MAIN
SWITCH
SYNCHRONOUS
SWITCH
TEMPERATURE (°C)
–50
550
500
450
400
350
300
250
200
150
100
25
75
3548A G10
–25
0
50
100
150
125
MAIN SWITCH
SYNCHRONOUS SWITCH
VIN = 3.6V
VIN = 4.2V
VIN = 2.7V
LOAD CURRENT (mA)
1
0
30
20
10
70
60
50
40
100
90
80
10
100
1000
3548A G11
2.7V
VOUT = 2.5V
Burst Mode OPERATION
FIGURE 3 CIRCUIT
3.3V
4.2V
LOAD CURRENT (mA)
1
0
30
20
10
70
60
50
40
100
90
80
10
100
1000
3548A G12
Burst Mode OPERATION
PULSE-SKIPPING MODE
VIN = 3.6V
VOUT = 1.8V
NO LOAD ON OTHER CHANNEL
LOAD CURRENT (mA)
1
–4
–3
1
0
–1
–2
4
3
2
10
100
1000
3548A G13
Burst Mode OPERATION
PULSE-SKIPPING MODE
VIN = 3.6V
VOUT = 1.8V
NO LOAD ON OTHER CHANNEL
LOAD CURRENT (mA)
1
0
30
20
10
70
60
50
40
100
90
80
10
100
1000
3548A G14
2.7V
4.2V
VOUT = 1.2V
Burst Mode OPERATION
3.3V
LOAD CURRENT (mA)
1
0
30
20
10
70
60
50
40
100
90
80
10
100
1000
3548A G15
2.7V
4.2V
VOUT = 1.5V
Burst Mode OPERATION
3.3V
VIN (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
3548A G16
35
VOUT = 1.8V
IOUT = 200mA



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