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| LTC3630_15 Datasheet, PDF (21/26 Pages) Linear Technology – High Efficiency, 65V 500mA Synchronous Step-Down Converter | |||
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Typical Applications
4V to 24V Input to 3.3V Output,
250mA Regulator with External Soft-Start, Small Size
VIN
4V TO 24V
CIN
2.2µF
VIN
SW
LTC3630
RUN
VFB
ISET
SS
FBO VPRG2
VPRG1
GND
L1
10µH
COUT
10µF
VOUT
3.3V
250mA
CSS
100nF
RISET
100k
3630 TA02a
CIN: MURATA GRM32RR71E225KA01
COUT: KEMET C1206C106K9PAC
L1: VISHAY IHLP2020BZ-100M-11
LTC3630
Efficiency and Power Loss vs Load Current
100
VIN = 12V
90
80
EFFICIENCY
70
60
50
POWER LOSS
40
30
20
10
0
0.1
1
10
LOAD CURRENT (mA)
1000
100
10
1
0
100
3630 TA02b
4V to 53V Input to â12V Output, Positive-to-Negative Converter
VIN
4V TO 53V
CIN
4.7µF
VIN
SW
LTC3630
RUN VFB
ISET
SS
FBO VPRG1
VPRG2
GND
L1
22µH
R1
200k
R2
147k
CIN: TDK C5750X7R2A475M
COUT: TDK C4532X7R1C226M
L1: COILCRAFT MSS1048-223ML
COUT
22µF
VOUT
3630 TA03a â12V
Maximum Load Current vs Input Voltage
500
VOUT = â12V
400
300
200
100
0
5 10 15 20 25 30 35 40 45 50
INPUT VOLTAGE (V)
3630 TA03b
For more information www.linear.com/LTC3630
3630fd
21
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