Datasheet

LT1941
22
1941fb
TYPICAL APPLICATIONS
Quadruple Output Power Supply:
±12V, 3.3V and 2.5V with Soft-Start
V
IN
V
OUT3
V
OUT2
V
OUT1
LT1941
GND
PGND
C2
0.22μF
C4
22μF
C12 1000pF
C13
1.5nF
C11
1.5nF
C10 1000pF
R5
13.7k
R13
118k
R11
2.49k
R10
10k
V
IN
5V
5GOOD
12GOOD
V
OUT1
2.5V
2.3A
V
OUT3
12V
100mA
V
OUT4
–12V
100mA
L2 3.3μH
L1 3μH
L3 10μH
R12
10.7k
R7
10.2k
R6
3.4k
R4
10k
R14
2.2k
C1 TO C9: X5R OR X7R
D1, D2: CMDSH-3
D3: B220A
D4: MBRM120L
D5 TO D8: MBR0540
1941 TA02
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
1Ω
C5
4.7μF
C9
4.7μF
D5
D8
D3
D7
D6
C6
10μF
C7
10μF
C8
10μF
C14 6800pF
PGOOD1
PGOOD2
PGOOD3
BOOST2
FB2
V
C2
FB1
V
C1
RUNSS2
BIAS1
BIAS2
V
C3
RUNSS3
RUNSS1
SW3
NFB
FB3
5GOOD
12GOOD
BOOST1
C15
1.5nF
SW2SW1
Triple Output Power Supply: 3.3V, 1.8V and –12V
V
OUT2
V
OUT1
LT1941
V
IN
GND
C2
0.22μF
C4
22μF
C10 1000pF
C11
1.5nF
C9
1.5nF
C8 3300pF
13.7k
133k
2.49k10k
V
IN
4.7V TO 14V
5GOOD
12GOOD
V
OUT1
1.8V
2.4A
V
OUT3
–12V
350mA*
3.3μH
3μH
22μH
22μH
10.7k
13.7k
7.32k 3.3k
1.5k
C1-C7: X5R OR X7R
D1, D2: CMDSH-3
D3: B220A
D4: UPS120
D5: B130
1941 F01
130k 100k 100k 100k 100k
PGOOD1
PGOOD2
PGOOD3
V
OUT2
3.3V
1.4A
C1
0.22μF
C3
33μF
C5
1μF
C7
10μF
*240mA AT V
IN
= 5V, 550mA AT V
IN
= 12V
C6
10μF
C12 22nF
PGOOD1
PGOOD2
PGOOD3
BOOST2
SW2
FB2
V
C2
SW1
FB1
V
C1
RUNSS2
BIAS1
BIAS2
V
C3
RUNSS3
RUNSS1
SW3
NFB
FB3
5GOOD
12GOOD
BOOST1
C13
1.5nF