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LTC3405A Scheda tecnica(PDF) 3 Page - Linear Technology

Il numero della parte LTC3405A
Spiegazioni elettronici  1.5MHz, 300mA Synchronous Step-Down Regulator in ThinSOT
PDF  16 Pages
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Produttore elettronici  LINER [Linear Technology]
Homepage  http://www.linear.com
Logo LINER - Linear Technology

LTC3405A Scheda tecnica(HTML) 3 Page - Linear Technology

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LTC3405A
3405afa
INPUT VOLTAGE (V)
2.5
3.0
4.0
5.0
4.5
95
90
85
80
75
70
65
60
55
50
3405A 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
3405A 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
3405A 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
3405A 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
3405A 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
3405A G07
SUPPLY VOLTAGE (V)
2
1.8
1.7
1.6
1.5
1.4
1.3
1.2
34
5
6
3405A G08
LOAD CURRENT (mA)
0
1.834
1.824
1.814
1.804
1.794
1.784
1.774
100
200
300
400
3405A G09
500
600
Burst Mode
OPERATION
PULSE SKIPPING MODE
INPUT VOLTAGE (V)
0
2
4
5
3405A 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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