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| LTC3631 Datasheet, PDF (18/22 Pages) Linear Technology – High Effi ciency, High Voltage 100mA Synchronous Step-Down Converter | |||
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LTC3631
TYPICAL APPLICATIONS
Small Size, Limited Peak Current, 20mA Regulator
VIN
7V TO 45V
VIN
SW
CIN R3
1μF 470k
LTC3631
RUN
VFB
R4
100k
HYST
SS
R5
ISET GND
33k
L1
470μH
R1
470k
R2
88.7k
3631 TA05a
COUT
10μF
VOUT
5V
20mA
CIN: TDK C3225X7R1H105KT
COUT: AVX 08056D106KAT2A
L1: MURATA LQH43CN471K03
VIN
15V TO 45V
High Efï¬ciency 15V, 20mA Regulator
L1
1000μH
VIN
SW
CIN
LTC3631
R1
1μF
3M
COUT
4.7μF
VOUT
15V
20mA
RUN
VFB
ISET
R2
169k
SS
HYST
GND
3631 TA07a
CIN: AVX 18125C105KAT2A
COUT: TDK C3216X7R1E475KT
L1: TDK SLF7045T-102MR14
Efï¬ciency vs Load Current
100
95
90
85
80
75
70
65
60
0.1
VIN = 24V
VIN = 36V
VIN = 45V
1
10
LOAD CURRENT (mA)
100
3631 TA07b
3631fb
18
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