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LTC3405A Scheda tecnica(PDF) 4 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) 4 Page - Linear Technology

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4
LTC3405A
3405afa
RDS(ON) vs Temperature
Dynamic Supply Current
Dynamic Supply Current
vs Temperature
Switch Leakage vs Temperature
Switch Leakage vs Input Voltage
TEMPERATURE (°C)
–50
1.2
1.0
0.8
0.6
0.4
0.2
0
25
75
–25
0
50
100
125
3405A G11
SYNCHRONOUS SWITCH
MAIN SWITCH
VIN = 2.7V
VIN = 3.6V
VIN = 4.2V
SUPPLY VOLTAGE (V)
2
1600
1400
1200
1000
800
600
400
200
0
34
5
6
3405A G12
VOUT = 1.8V
ILOAD = 0A
PULSE SKIPPING MODE
Burst Mode OPERATION
TEMPERATURE (°C)
–50
600
500
400
300
200
100
0
25
75
–25
0
50
100
125
VIN = 3.6V
VOUT = 1.8V
ILOAD = 0A
3405A G13
PULSE SKIPPING MODE
Burst Mode OPERATION
TEMPERATURE (°C)
–50
160
140
120
100
80
60
40
20
0
25
75
–25
0
50
100
125
VIN = 5.5V
RUN = 0V
3405A G14
MAIN SWITCH
SYNCHRONOUS
SWITCH
INPUT VOLTAGE (V)
0
60
50
40
30
20
10
0
1
23
4
3405A G15
56
RUN = 0V
MAIN SWITCH
SYNCHRONOUS
SWITCH
SW
5V/DIV
VOUT
100mV/DIV
AC COUPLED
IL
100mA/DIV
3405A G16
5µs/DIV
VIN = 3.6V
VOUT = 1.8V
ILOAD = 20mA
SW
5V/DIV
VOUT
10mV/DIV
AC
COUPLED
IL
100mA/DIV
3405A G17
500ns/DIV
VIN = 3.6V
VOUT = 1.8V
ILOAD = 20mA
RUN
2V/DIV
VOUT
1V/DIV
IL
200mA/DIV
3405A G18
100µs/DIV
VIN = 3.6V
VOUT = 1.8V
ILOAD = 250mA
3405A G19
VOUT
100mV/DIV
AC
COUPLED
ILOAD
200mA/DIV
IL
200mA/DIV
40µs/DIV
VIN = 3.6V
VOUT = 1.8V
ILOAD = 0mA TO 250mA
PULSE SKIPPING MODE
TYPICAL PERFOR A CE CHARACTERISTICS
(From Figure 1a Except for the Resistive Divider Resistor Values)
Burst Mode Operation
Pulse Skipping Mode Operation
Start-Up from Shutdown
Load Step



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