Datasheet

LT1941
21
1941fb
APPLICATIONS INFORMATION
SLIC Power Supply
–21.6V, –65V, 3.3V and 1.8V with Soft-Start
V
IN
LT1941
GND
PGND
C2
0.22μF
C4
22μF
C13 1000pF
C15
1.5nF
C14
1.5nF
C12 3300pF
R5
10.2k
R15
1Ω
R13
178k
R11
2.49k
R10
10k
V
IN
5V
5GOOD
12GOOD
V
OUT1
1.8V
2.4A
V
OUT3
–21.6V
72mA
V
OUT4
–65V
30mA
L2 3.3μH
L1 3μH
L3
2.7μH
R12
10.7k
R7
13.7k
R6
7.32k
R4
3.3k
R14
15k
1941 TA01
R2
130k
R1
100k
R3
100k
R8
100k
R9
100k
D2
D4
PGOOD1
PGOOD2
PGOOD3
V
OUT2
3.3V
1.4A
C1
0.22μF
D1
C3
33μF
D3
C5
1μF
35V
C6
10μF
C7
4.7μF
25V
C8
1μF
35V
C10
1μF
35V
C16 4700pF
PGOOD1
PGOOD2
PGOOD3
BOOST2
FB2
V
C2
FB1
V
C1
RUNSS2
BIAS1
BIAS2
V
C3
RUNSS3
RUNSS1
SW3
NFB
FB3
5GOOD
12GOOD
BOOST1
C17
1.5nF
NOTE: TOTAL OUTPUT POWER OF V
OUT3
AND V
OUT4
NOT TO EXCEED 1.9W
C1 TO C11: X5R OR X7R
D1, D2: CMDSH-3
D3: B220A
D4: MBRM120L
D5 TO D7: BAV99 OR EQUIVALENT
SW2SW1
D5
V
OUT2
V
OUT1
C9
4.7μF
25V
D6
C11
4.7μF
25V
D7