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LTZQ Просмотр технического описания (PDF) - Linear Technology
Номер в каталоге
Компоненты Описание
производитель
LTZQ
1.5V, 1.8V, 1.5MHz, 300mA Synchronous Step-Down Regulators in ThinSOT
Linear Technology
LTZQ Datasheet PDF : 16 Pages
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LTC3405A-1.5/LTC3405A-1.8
TYPICAL PERFOR A CE CHARACTERISTICS
(From Figure 1a)
Dynamic Supply Current
vs Supply Voltage
1800
1600
V
OUT
= 1.8V
I
LOAD
= 0A
1400
1200
1000
800
600
400
200
0
2
PULSE SKIPPING MODE
BURST MODE OPERATION
2.5 3 3.5 4 4.5 5 5.5
SUPPLY VOLTAGE (V)
3405A1518 G12
Dynamic Supply Current
vs Temperature
340
V
IN
= 3.6V
300
V
OUT
= 1.8V
I
LOAD
= 0A
260
PULSE SKIPPING MODE
220
180
140
100
60
BURST MODE OPERATION
20
0
–50 –25 0 25 50 75
TEMPERATURE (
°
C)
100 125
3405A1518 G13
Switch Leakage vs Temperature
160
V
IN
= 5.5V
140
RUN = 0V
120
100
80
60
SYNCHRONOUS
40
SWITCH
20
MAIN SWITCH
0
–50 –25
0 25 50 75
TEMPERATURE (
°
C)
100 125
3405F G14
Switch Leakage vs Input Voltage
60
RUN = 0V
50
SYNCHRONOUS
SWITCH
40
30
Burst Mode Operation
SW
5V/DIV
V
OUT
100mV/DIV
AC COUPLED
20
MAIN SWITCH
10
I
L
100mA/DIV
Pulse Skipping Mode Operation
SW
5V/DIV
V
OUT
10mV/DIV
AC
COUPLED
I
L
100mA/DIV
0
0
1
2
3
4
56
INPUT VOLTAGE (V)
3405F G15
Start-Up from Shutdown
V
IN
= 3.6V
V
OUT
= 1.8V
I
LOAD
=
20mA
5
µ
s/DIV
3405A1518
G16
Load Step
V
IN
= 3.6V
V
OUT
= 1.8V
I
LOAD
=
20mA
500ns/DIV
3405A1518
G17
RUN
2V/DIV
V
OUT
1V/DIV
V
OUT
100mV/DIV
AC
COUPLED
I
L
200mA/DIV
I
L
200mA/DIV
I
LOAD
200mA/DIV
4
V
IN
= 3.6V
V
OUT
= 1.8V
I
LOAD
=
250mA
100
µ
s/DIV
3405A1518
G18
V
IN
= 3.6V
40
µ
s/DIV
V
OUT
= 1.8V
I
LOAD
=
0mA TO 250mA
PULSE SKIPPING MODE
3405A1518
G19
3405a1518fa
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