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LTC3620 Datasheet(PDF) 14 Page - Linear Technology

Part # LTC3620
Description  Ultralow Power 15mA Synchronous Step-Down Switching Regulator
PDF  16 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3620 Datasheet(HTML) 14 Page - Linear Technology

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LTC3620
14
3620f
TYPICAL APPLICATIONS
High Efficiency Low Power Step-Down Converter,
Externally Programmed fMIN
Efficiency vs Load Current
Efficiency vs VIN
VIN
RUN
1μF
CER
1μF
CER
LOBATB
LOBATB
VIN
2.9V TO 5.5V
VOUT
1.1V
523k
3620 TA03a
432k
1M
22μH
22pF
LTC3620
SW
VFB
FMIN/MODE
FMIN/MODE
GND
Spectral Content,
FMIN/MODE = 20kHz Clock
Spectral Content,
FMIN/MODE = 100kHz Clock
Spectral Content,
FMIN/MODE = 200kHz Clock
LOAD CURRENT (mA)
0.1
40
50
60
70
80
110
3620 TA03b
30
20
10
0
90
100
fMIN = 20kHz
fMIN = 100kHz
fMIN = 200kHz
TA = 25°C
VIN = 3.6V
VOUT = 1.1V
2.99kHz/DIV
3620 TA03d
RBW = 3Hz
VOUT = 1.1V
VIN = 3.6V
IOUT = 500μA
TA = 25°C
–60
–40
–80
–100
–120
–140
20.0kHz
–64.9dBm
1kHz
30kHz
14.9kHz/DIV
3620 TA03e
VOUT = 1.1V
VIN = 3.6V
IOUT = 1mA
TA = 25°C
–60
–40
–80
–100
–120
–140
99.9kHz
–59.9dBm
1kHz
150kHz
21.9kHz/DIV
3620 TA03f
VOUT = 1.1V
VIN = 3.6V
IOUT = 1mA
TA = 25°C
–60
–40
–80
–100
–120
–140
199.7kHz
1kHz
220kHz
VIN (V)
2.5
0
10
30
40
50
100
70
3.5
4.5
3620 TA03c
20
80
90
60
5.5
6.5
IOUT = 500μA
IOUT = 1mA
IOUT = 10mA
TA = 25°C
VOUT = 1.1V
fMIN = 200kHz



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