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LTC3405A-1.5 Datasheet(PDF) 3 Page - Linear Technology

Part # LTC3405A-1.5
Description  1.5V, 1.8V, 1.5MHz, 300mA Synchronous Step-Down Regulators in ThinSOT
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3405A-1.5 Datasheet(HTML) 3 Page - Linear Technology

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LTC3405A-1.5/LTC3405A-1.8
3405a1518fa
INPUT VOLTAGE (V)
2.5
3.0
4.0
5.0
4.5
95
90
85
80
75
70
65
60
55
50
3405A1518 G02
3.5
5.5
Burst Mode OPERATION
VOUT = 1.8V
IOUT = 0.1mA
IOUT = 250mA
IOUT = 100mA
IOUT = 10mA
IOUT = 1mA
OUTPUT CURRENT (mA)
0.1
10
1000
100
90
80
70
60
50
40
30
20
10
0
3405A1518 G03
1
100
VIN = 3.6V
VIN = 4.2V
VIN = 3.6V
VIN = 4.2V
VOUT = 1.8V
PULSE SKIPPING MODE
Burst Mode OPERATION
OUTPUT CURRENT (mA)
0.1
10
1000
100
90
80
70
60
50
40
3405A1518 G04
1
100
VIN = 2.7V
VIN = 5.5V
VIN = 4.2V
VIN = 3.6V
VOUT = 1.8V
TYPICAL PERFOR A CE CHARACTERISTICS
OUTPUT CURRENT (mA)
60
80
100
50
70
90
0.1
10
100
1000
3405A1518 G05
40
1
VIN = 2.7V
VIN = 4.2V
VOUT = 1.5V
VIN = 3.6V
Efficiency vs Input Voltage
Efficiency vs Output Current
Efficiency vs Output Current
Efficiency vs Output Current
Oscillator Frequency vs
Temperature
Oscillator Frequency vs
Supply Voltage
Output Voltage vs Load Current
RDS(ON) vs Input Voltage
TEMPERATURE (°C)
–50
1.70
1.65
1.60
1.55
1.50
1.45
1.40
1.35
1.30
25
75
–25
0
50
100
125
VIN = 3.6V
3405A1518 G07
SUPPLY VOLTAGE (V)
2
1.8
1.7
1.6
1.5
1.4
1.3
1.2
34
5
6
3405A1518 G08
LOAD CURRENT (mA)
0
1.834
1.824
1.814
1.804
1.794
1.784
1.774
100
200
300
400
3405A1518 G09
500
600
Burst Mode
OPERATION
PULSE SKIPPING MODE
INPUT VOLTAGE (V)
0
2
4
5
3405A1518 G10
13
6
7
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
MAIN SWITCH
SYNCHRONOUS
SWITCH
(From Figure1a)
RDS(ON) vs Temperature
TEMPERATURE (°C)
–50
1.2
1.0
0.8
0.6
0.4
0.2
0
25
75
–25
0
50
100
125
3405F G11
SYNCHRONOUS SWITCH
MAIN SWITCH
VIN = 2.7V
VIN = 3.6V
VIN = 4.2V


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