LT1941 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LT1941' PDF : 24 Pages View PDF
LT1941
TYPICAL APPLICATIONS
Quadruple Output Power Supply:
±12V, 3.3V and 2.5V with Soft-Start
VIN
5V
5GOOD
12GOOD
VOUT1
2.5V
2.3A
VOUT3
12V
100mA
C6
10μF
VOUT4
–12V
100mA
D1
L1 3μH
C3
33μF
L3 10μH
D5
C9
4.7μF
C7
10μF
C8
10μF
VOUT1 VOUT2 VOUT3
R7
10.2k
D3
R6
3.4k
C5
4.7μF
D8
R2 R1
130k 100k
C1
0.22μF
VIN
PGOOD1
5GOOD PGOOD2
12GOOD PGOOD3
BOOST1 BOOST2
LT1941
SW1
SW2
C10 1000pF
R4 C11
10k 1.5nF
FB1
FB2
VC1
VC2
RUNSS1 RUNSS2
1Ω
R13
118k
D7
SW3
NFB
FB3
R5
PGND
13.7k
BIAS1
BIAS2
VC3
RUNSS3
GND
R3 R8 R9
100k 100k 100k
C2
0.22μF
D2
L2 3.3μH
R12
10.7k
C12 1000pF
C13
1.5nF
R10
10k
R11
2.49k
D4
C4
22μF
C14 6800pF
C15
1.5nF
R14
2.2k
1941 TA02
D6
C1 TO C9: X5R OR X7R
D1, D2: CMDSH-3
D3: B220A
D4: MBRM120L
D5 TO D8: MBR0540
PGOOD1
PGOOD2
PGOOD3
VOUT2
3.3V
1.4A
Triple Output Power Supply: 3.3V, 1.8V and –12V
VIN
4.7V TO 14V
5GOOD
12GOOD
VOUT1
1.8V
2.4A
VOUT3
–12V
350mA*
C6
10μF
VOUT1
VOUT2
3μH
C3
33μF
13.7k
7.32k
22μH
C5
1μF
22μH
C7
10μF
130k 100k
C1
0.22μF
C8 3300pF
3.3k C9
1.5nF
133k 13.7k
VIN
PGOOD1
5GOOD PGOOD2
12GOOD PGOOD3
BOOST1 BOOST2
LT1941
SW1
SW2
FB1
FB2
VC1
VC2
RUNSS1 RUNSS2
SW3
BIAS1
NFB
BIAS2
VC3
FB3
RUNSS3
GND
100k 100k 100k
C2
0.22μF
10.7k
C10 1000pF
C11 10k 2.49k
1.5nF
3.3μH
C4
22μF
C12 22nF
C13
1.5k
1.5nF
*240mA AT VIN = 5V, 550mA AT VIN = 12V
C1-C7: X5R OR X7R
D1, D2: CMDSH-3
D3: B220A
D4: UPS120
D5: B130
1941 F01
PGOOD1
PGOOD2
PGOOD3
VOUT2
3.3V
1.4A
22
1941fb
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