lt1941 Linear Technology Corporation, lt1941 Datasheet - Page 22

• Manufacturer Part Number: lt1941
• Description: Triple Monolithic Switching Regulator
• Manufacturer: Linear Technology Corporation

LT1941
TYPICAL APPLICATIO S
22
12GOOD
5GOOD
100mA
100mA
V
V
V
4.7V TO 14V
–12V
OUT1
OUT3
OUT4
2.5V
2.3A
12V
V
5V
10µF
12GOOD
IN
350mA*
5GOOD
C6
V
V
–12V
OUT1
OUT3
1.8V
2.4A
V
10µF
IN
C6
L3 10µH
*240mA AT V
L1 3µH
C3
33µF
D1
D5
C7
10µF
C3
33µF
22µH
3µH
C8
10µF
4.7µF
C7
10µF
C9
IN
22µH
= 5V, 550mA AT V
1µF
U
C5
D8
4.7µF
D3
13.7k
7.32k
10.2k
C5
Triple Output Power Supply: 3.3V, 1.8V and –12V
R7
3.4k
R6
D6
3.3k
133k
130k
10k
D7
C8 3300pF
R4
±12V, 3.3V and 2.5V with Soft-Start
R2
130k
IN
C10 1000pF
C1
0.22µF
Quadruple Output Power Supply:
C1
0.22µF
= 12V
R13
118k
1Ω
1.5nF
1.5nF
100k
C9
13.7k
R1
100k
C11
R5
13.7k
C1-C7: X5R OR X7R
D1, D2: CMDSH-3
D3: B220A
D4: UPS120
D5: B130
5GOOD
12GOOD
BOOST1
SW1
FB1
V
RUNSS1
SW3
NFB
FB3
C1 TO C9: X5R OR X7R
D1, D2: CMDSH-3
D3: B220A
D4: MBRM120L
D5 TO D8: MBR0540
C1
5GOOD
12GOOD
BOOST1
SW1
RUNSS1
SW3
NFB
FB3
FB1
V
PGND
C1
LT1941
GND
V
LT1941
IN
PGOOD1
PGOOD2
PGOOD3
V
RUNSS2
RUNSS3
BOOST2
IN
BIAS1
BIAS2
PGOOD1
PGOOD2
PGOOD3
RUNSS2
RUNSS3
BOOST2
SW2
GND
FB2
V
V
BIAS1
BIAS2
C2
C3
SW2
FB2
V
V
C2
C3
V
OUT1
V
C11
1.5nF
C10 1000pF
OUT1
100k
C13
1.5nF
C12 1000pF
R3
100k
V
10k
C13
1.5nF
OUT2
100k
V
R10
10k
OUT2
C15
1.5nF
C2
0.22µF
C12 22nF
R8
100k
C14 6800pF
C2
0.22µF
2.49k
V
10.7k
R11
2.49k
OUT3
100k
10.7k
R12
R9
100k
1.5k
D4
3.3µH
R14
2.2k
L2 3.3µH
22µF
C4
22µF
C4
D2
1941 F01
1941 TA02
PGOOD1
PGOOD2
PGOOD3
V
3.3V
1.4A
OUT2
PGOOD1
PGOOD2
PGOOD3
V
3.3V
1.4A
OUT2
1941fa