Datasheet

LTC3632
17
3632fc
TYPICAL APPLICATIONS
Figure 11. High Efficiency 5V Regulator
3.3V, 20mA Regulator with Peak Current Soft-Start, Small Size Soft-Start Waveforms
V
IN
LTC3632
RUN
C
IN
4.7µF
HYST
3632 F11
SW
V
IN
5V TO 50V
V
OUT
5V
20mA
V
FB
SS
I
SET
GND
L1
1mH
R1
4.2M
R2
800k
C
IN
: TDK C5750X7R2A475MT
C
OUT
: AVX 1812D107MAT
L1: COILCRAFT LPS6235-105ML
C
OUT
100µF
C
SS
470nF
OUTPUT
VOLTAGE
1V/DIV
INDUCTOR
CURRENT
20mA/DIV
2ms/DIV
3632 TA03b
V
IN
LTC3632
RUN
C
IN
1µF
SS
3632 TA03a
SW
V
IN
4.5V TO 24V
V
OUT
3.3V
20mA
V
FB
HYST
I
SET
GND
L1
470µH
R1
294k
R2
93.1k
C
IN
: TDK C3216X7R1E105KT
C
OUT
: AVX 08056D106KAT2A
L1: MURATA LQH43CN471K03
C
OUT
10µF
C
SS
0.1µF
Positive-to-Negative Converter Maximum Load Current vs Input Voltage
V
IN
LTC3632
RUN
C
IN
1µF
HYST
3632 TA04a
SW
V
IN
4.5V TO 38V
V
OUT
–12V
V
FB
SS
I
SET
GND
L1
1mH
R1
1M
R2
71.5k
C
IN
: TDK C3225X7R1H105KT
C
OUT
: MURATA GRM32DR71C106KA01
L1: TYCO/COEV DQ6545-102M
C
OUT
10µF
INPUT VOLTAGE (V)
5
5
MAXIMUM LOAD CURRENT (mA)
15
10
20
15
25
30 50
3632 TA04b
10 20
35
40
45
I
SET
OPEN
V
OUT
= –3V
V
OUT
= –5V
V
OUT
= –12V