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LTC3405 Datasheet(PDF) 3 Page - Linear Technology

Part # LTC3405
Description  1.5MHz, 300mA Synchronous Step-Down Regulator in ThinSOT
PDF  16 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3405 Datasheet(HTML) 3 Page - Linear Technology

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LTC3405
3405fa
INPUT VOLTAGE (V)
2.5
3.0
4.0
5.0
4.5
95
90
85
80
75
70
65
60
55
50
3405 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
3405 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
3405 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)
0.1
10
1000
100
90
80
70
60
50
40
3405 G05
1
100
VIN = 2.7V
VIN = 4.2V
VOUT = 1.3V
VIN = 3.6V
Efficiency vs Input Voltage
Efficiency vs Output Current
Efficiency vs Output Current
Efficiency vs Output Current
Reference Voltage vs
Temperature
Oscillator Frequency vs
Temperature
Oscillator Frequency vs
Supply Voltage
Output Voltage vs Load Current
RDS(ON) vs Input Voltage
TEMPERATURE (°C)
–50
0.814
0.809
0.804
0.799
0.794
0.789
0.784
25
75
–25
0
50
100
125
VIN = 3.6V
3405 G06
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
3405 G07
SUPPLY VOLTAGE (V)
2
1.8
1.7
1.6
1.5
1.4
1.3
1.2
34
5
6
3405 G08
LOAD CURRENT (mA)
0
1.834
1.824
1.814
1.804
1.794
1.784
1.774
100
200
300
400
3405 G09
500
600
Burst Mode
OPERATION
PULSE SKIPPING MODE
VIN = 3.6V
INPUT VOLTAGE (V)
0
2
4
5
3405 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 Except for the Resistive Divider Resistor Values)



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