LT3581IMSE-TRPBF データシートの表示（PDF） - Linear Technology
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LT3581IMSE-TRPBF Datasheet PDF : 36 Pages
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LT3581
TYPICAL APPLICATIONS
1MHz, ±12V Charge Pump Topology Uses Only Single Inductor
C3
1µF
VIN
5V
C1
3.3µF
L1
8.2µH
C2
D1 1µF
SW1 SW2
VIN LT3581 FB
SHDN
100k
FAULT
RT
GATE
CLKOUT
VC
86.6k
SYNC
SS
GND
D5
D4
R1
*2.4k
D3
D2
C5
10µF
VOUT–
–12V
0.27A
VOUT+
12V
0.27A
130k
100pF
0.1µF
C4
10µF
16.9k
2.2nF
3581 TA08a
C1: 3.3µF, 25V, X7R, 1206
C2, C3: 1µF, 25V, X7R, 1206
C4, C5: 10µF, 50V, X7R, 1210
D1 TO D5: DIODES INC. PD3S230H-7
L1: VISHAY IHLP-2525CZ-01-8R2
R1: 2.4k, 2W
*IF DRIVING ASYMMMETRICAL LOADS,
PLACE A 2.4k, 2W RESISTOR FROM THE 12V
OUTPUT TO THE –12V OUTPUT FOR IMPROVED
LOAD REGULATION OF THE –12V OUTPUT
700kHz, –5V Inverting Converter Can Accept Input Voltages from 3V to 16V
VIN
3V TO 16V
C1
22µF
L1
3.3µH
C2
1µF
SW1 SW2
VIN LT3581 FB
SHDN
100k
FAULT
RT
GATE
CLKOUT
VC
124k
SYNC
SS
GND
L2
3.3µH
D1
60.4k
56pF
0.1µF
C1: 22µF, 25V, X7R, 1210
C2: 1µF, 50V, X7R, 1206
C3: 22µF, 16V, X7R, 1210
D1: VISHAY SSB44
L1, L2: COILCRAFT MSD7342-332MLB
VOUT
–5V
0.9A (VIN = 3.3V)
1.5A (VIN = 12V)
1.6A (VIN = 16V)
C3
22µF
6.19k
2.2nF
3581 TA09a
700kHz, 5V SEPIC Can Accept Input Voltages from 3V to 16V
VIN
3V TO 16V
L1
3.3µH
C2
1µF
D1
SW1 SW2
L2
• 3.3µH
VOUT
5V
0.9A (VIN = 3V)
1.5A (12V ≤ VIN ≤ 16V)
VIN LT3581 FB
C1
22µF
SHDN
GATE
100k
FAULT CLKOUT
RT
VC
124k
SYNC
SS
GND
C1: 22µF, 25V, X7R, 1210
C2: 1µF, 50V, X7R, 1206
C3: 22µF, 16V, X7R, 1210
D1: DIODES INC. B230LA
L1, L2: COILCRAFT MSD7342-332MLB
45.3k
C3
22µF
×2
100pF
1µF
7.87k
2.2nF
3581 TA10a
Efficiency and Power Loss with
Symmetric Load
90
1800
85
1600
80
1400
1200
75
1000
70
800
65
600
60
400
55
200
50
0
0
50 100 150 200 250 300
LOAD CURRENT (mA)
3581 TA08b
Efficiency
90
85
VIN = 3.3V
80
VIN = 12V
75
VIN = 16V
70
65
60
55
50
0
300 600 900 1200 1500 1800
LOAD CURRENT (mA)
3581 TA09b
Efficiency
90
85
VIN = 3.3V
80
VIN = 12V
75
VIN = 16V
70
65
60
55
50
0
400
800
1200
1600
LOAD CURRENT (mA)
3581 TA10b
32
For more information www.linear.com/LT3581
3581fb
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