LTC3630
TYPICAL APPLICATIONS
4V to 24V Input to 3.3V Output,
Efficiency and Power Loss vs Load Current
250mA Regulator with External Soft-Start, Small Size
100
90
80
70
60
50
40
30
20
10
0
V
= 3.3V
OUT
L1
10ꢀH
EFFICIENCY
V
OUT
V
IN
1000
100
10
1
3.3V
V
SW
LTC3630
IN
4V TO 24V
C
C
OUT
IN
250mA
2.2ꢀF
10ꢀF
V
FB
RUN
I
SET
SS
R
ISET
POWER
C
SS
100k
FBO
V
PRG1
V
PRG2
100nF
3630 TA02a
GND
C
C
: MURATA GRM42-2X7R225K25D500
IN
0
: KEMET C1206C206K9PAC
OUT
0.1
1
10
100
L1: VISHAY IHLP2020BZ-100M-11
LOAD CURRENT (mA)
3630 TA02b
4V to 53V Input to –12V Output, Positive-to-Negative Converter
Maximum Load Current vs Input Voltage
500
L1
22ꢀH
V
= –12V
OUT
V
IN
V
SW
LTC3630
RUN
IN
4V TO 53V
C
4.7ꢀF
100V
IN
R1
400
300
200k
V
FB
C
OUT
R2
147k
I
SS
SET
22ꢀF
FBO
V
V
PRG2
PRG1
200
100
0
GND
V
OUT
–12V
3630 TA03a
C
C
: KEMET C1210C475K5RAC
IN
OUT
: TDK C4532X7R1C226M
L1: COILCRAFT MSS1048-223ML
5
10 15 20 25 30 35 40 45 50
INPUT VOLTAGE (V)
3630 TA03b
3630fb
21
Linear Systems [ Linear Systems ]
