LTC3620EDC-TRPBF 查看數據表（PDF） - Linear Technology
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LTC3620EDC-TRPBF Datasheet PDF : 18 Pages
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TYPICAL APPLICATIONS
High Efficiency Low Power Step-Down Converter,
Externally Programmed fMIN
VIN
2.9V TO 5.5V
1μF
CER
VIN
RUN LOBATB
SW
LTC3620
LOBATB
1M
22μH
22pF
VOUT
1.1V
FMIN/MODE
FMIN/MODE VFB
GND
432k
523k
1μF
CER
3620 TA03a
LTC3620
100
90
80
70
60
50
40
30
20
10
0
0.1
Efficiency vs Load Current
TA = 25°C
VIN = 3.6V
VOUT = 1.1V
fMIN = 20kHz
fMIN = 100kHz
fMIN = 200kHz
1
LOAD CURRENT (mA)
10
3620 TA03b
Efficiency vs VIN
100
90
80
70
60
50
40
30
20 TA = 25°C
10 VOUT = 1.1V
0 fMIN = 200kHz
2.5
3.5
4.5
VIN (V)
IOUT = 500μA
IOUT = 1mA
IOUT = 10mA
5.5
6.5
3620 TA03c
Spectral Content,
FMIN/MODE = 20kHz Clock
–40
–60
20.0kHz
–64.9dBm
–80
–100
–120
1kHz
–140
RBW = 3Hz
VOUT = 1.1V
VIN = 3.6V
IOUT = 500μA
TA = 25°C
2.99kHz/DIV
30kHz
3620 TA03d
Spectral Content,
FMIN/MODE = 100kHz Clock
–40
–60
99.9kHz
–59.9dBm
–80
–100
–120
–140 1kHz
VOUT = 1.1V
VIN = 3.6V
IOUT = 1mA
TA = 25°C
14.9kHz/DIV
150kHz
3620 TA03e
Spectral Content,
FMIN/MODE = 200kHz Clock
–40
–60
199.7kHz
–80
–100
–120
–140 1kHz
VOUT = 1.1V
VIN = 3.6V
IOUT = 1mA
TA = 25°C
21.9kHz/DIV
220kHz
3620 TA03f
3620fa
15
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