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| LTC3632_15 Datasheet, PDF (17/22 Pages) Linear Technology – High Efficiency, High Voltage 20mA Synchronous Step-Down Converter | |||
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TYPICAL APPLICATIONS
VIN
5V TO 50V
CIN
4.7µF
VIN
SW
LTC3632
RUN
VFB
HYST
ISET
SS
GND
L1
1mH
R1
4.2M
R2
800k
CSS
470nF
3632 F11
CIN: TDK C5750X7R2A475MT
COUT: AVX 1812D107MAT
L1: COILCRAFT LPS6235-105ML
Figure 11. High Efficiency 5V Regulator
COUT
100µF
VOUT
5V
20mA
LTC3632
3.3V, 20mA Regulator with Peak Current Soft-Start, Small Size
VIN
4.5V TO 24V
CIN
1µF
CSS
0.1µF
VIN
SW
LTC3632
RUN
VFB
ISET
SS
HYST
GND
L1
470µH
R1
294k
R2
93.1k
3632 TA03a
COUT
10µF
VOUT
3.3V
20mA
CIN: TDK C3216X7R1E105KT
COUT: AVX 08056D106KAT2A
L1: MURATA LQH43CN471K03
OUTPUT
VOLTAGE
1V/DIV
INDUCTOR
CURRENT
20mA/DIV
Soft-Start Waveforms
2ms/DIV
3632 TA03b
VIN
4.5V TO 38V
Positive-to-Negative Converter
L1
1mH
VIN
SW
CIN
1µF
LTC3632
RUN
R1
1M
ISET
VFB
HYST
SS
GND
R2
71.5k
CIN: TDK C3225X7R1H105KT
COUT: MURATA GRM32DR71C106KA01
L1: TYCO/COEV DQ6545-102M
COUT
10µF
VOUT
â12V
3632 TA04a
Maximum Load Current vs Input Voltage
20
ISET OPEN
VOUT = â3V
VOUT = â5V
15
VOUT = â12V
10
5
5 10 15 20 25 30 35 40 45 50
INPUT VOLTAGE (V)
3632 TA04b
3632fc
17
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