LT3579IUFD-1-PBF Просмотр технического описания (PDF) - Linear Technology
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LT3579IUFD-1-PBF Datasheet PDF : 40 Pages
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LT3579/LT3579-1
TYPICAL APPLICATION
1MHz, 5V to ±12V Converter
C2
4.7μF
D5
VOUT 2
–12V
D4
COUT 2 0.8A*
R1**
10μF
VIN
L1
4.7μH
C1
D1 4.7μF
1.2k
D3
s2
VOUT1
12V
5V
D2
0.8A*
SW1 SW2
VIN
FB
130k
COUT1
10μF
SHDN
GATE
s2
LT3579
100k
FAULT
CLKOUT
CIN
10μF
RT
VC
SYNC GND SS
27pF 34k
86.6k
0.1μF
1nF
3579 TA20
CIN: 10μF, 16V, X7R, 1206
C1, C2: 4.7μF, 25V, X7R, 1206
COUT1, COUT2: 10μF, 25V, X7R, 1210
D1-D5: DIODES INC SBR2A40P1
L1: VISHAY IHLP-2525CZ-01-4R7
R1: 1.2k, 2W
*MAX TOTAL OUTPUT POWER = 9.6W
**IF DRIVING ASYMMETRICAL LOADS, PLACE A 1.2k, 2W
RESISTOR FROM THE +12V OUTPUT TO THE –12V OUTPUT FOR
IMPROVED LOAD REGULATION OF THE –12V OUTPUT.
Efficiency and Power Loss
90
3
85
2.7
80
2.4
75
2.1
70
1.8
65
1.5
60
1.2
55
0.9
50
0.6
45
0.3
40
0
0
100 200 300 400 500
LOAD CURRENT (mA)
3579 TA21
Transient Response with 0.15A to 0.35A to 0.15A
Symmetrical Output Load Step
VOUT1
500mV/DIV
AC COUPLED
VOUT2
500mV/DIV
AC COUPLED
IL
1A/DIV
100μs/DIV
3579 TA22
35791f
35
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