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Компоненты Описание
LTC1877 Просмотр технического описания (PDF) - Linear Technology
Номер в каталоге
Компоненты Описание
производитель
LTC1877
High Efficiency Monolithic Synchronous Step-Down Regulator
Linear Technology
LTC1877 Datasheet PDF : 16 Pages
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TYPICAL PERFORMANCE CHARACTERISTICS
LTC1877
Switch Leakage vs Temperature
1400
1200
V
IN
= 10V
RUN = 0V
1000
800
MAIN SWITCH
600
400
SYNCHRONOUS
SWITCH
200
0
–50 –25
0 25 50 75
TEMPERATURE (
°
C)
100 125
1877 •
G12
Switch Leakage vs Input Voltage
16
RUN = 0V
14
12
Burst Mode Operation
SW
5V/DIV
10
8
SYNCHRONOUS
SWITCH
6
V
OUT
20mV/DIV
AC COUPLED
4
I
L
200mA/DIV
2
MAIN SWITCH
0
0
2
4
6
8
10
INPUT VOLTAGE (V)
1877 • G13
V
IN
= 5V
V
OUT
= 1.5V
C
IN
= 10
µ
F
10
µ
s/DIV
L = 10
µ
H
C
OUT
= 47
µ
F
I
LOAD
= 50mA
Start-Up from Shutdown
Load Step Response
1877 • G14
RUN
5V/DIV
V
OUT
1V/DIV
I
L
500mA/DIV
V
IN
= 5V
V
OUT
= 1.5V
L = 10
µ
H
50
µ
s/DIV
C
IN
= 10
µ
F
C
OUT
= 47
µ
F
I
LOAD
= 500mA
1877 • G15
Load Step Response
V
OUT
50mV/DIV
AC COUPLED
I
L
500mA/DIV
I
TH
1V/DIV
V
IN
= 5V
V
OUT
= 1.5V
L = 10
µ
H
40
µ
s/DIV
C
IN
= 10
µ
F
C
OUT
= 47
µ
F
I
LOAD
= 50mA TO 500mA
PULSE SKIPPING MODE
1877 • G16
Load Step Response
V
OUT
50mV/DIV
AC COUPLED
I
L
500mA/DIV
10
µ
s/DIV
V
OUT
50mV/DIV
AC COUPLED
I
L
500mA/DIV
I
TH
1V/DIV
V
IN
= 5V
V
OUT
= 1.5V
L = 10
µ
H
40
µ
s/DIV
C
IN
= 10
µ
F
C
OUT
= 47
µ
F
I
LOAD
= 50mA TO 500mA
Burst Mode OPERATION
1877 • G17
I
TH
1V/DIV
V
IN
= 5V
V
OUT
= 1.5V
L = 10
µ
H
20
µ
s/DIV
C
IN
= 10
µ
F
C
OUT
= 47
µ
F
I
LOAD
= 200mA TO 500mA
PULSE SKIPPING MODE
1877 • G18
5
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