LT3581IDE-TRPBF Просмотр технического описания (PDF) - Linear Technology
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LT3581IDE-TRPBF Datasheet PDF : 36 Pages
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LT3581
TYPICAL APPLICATIONS
VIN
5V
C1
4.7µF
L1
1.5µH
D1
SW1 SW2
18.7k
VIN
FB
100k
FAULT
GATE
10k
43.2k
SHDN
CLKOUT
RT LT3581 VC
SYNC
SS
GND
C2
4.7µF
130k
56pF
0.1µF
M1
6.04k
D2
VIN
VOUT
12V
830mA
C3
4.7µF
10.5k
1nF
3581 F18
C1: 4.7µF, 16V, X7R, 1206
D2: VISHAY MSS2P3
C2, C3: 4.7µF, 25V, X7R, 1206 L1: SUMIDA CDR6D28MN-IR5
D1: DIODES INC. PD3S230H-7 M1: VISHAY SILICONIX SI7123DN
Figure 18. 2MHz, 5V to 12V, 830mA Boost Converter with Output Short Circuit Protection
Transient Response with 430mA to 830mA to 430mA Load Step
VOUT
AC-COUPLED
1V/DIV
IL
1A/DIV
LOAD
0.5A/DIV
50µs/DIV
3581 TA02a
Switching Waveforms with 830mA Load
VOUT
AC-COUPLED
200mV/DIV
IL
1A/DIV
VSW
0.5A/DIV
VCLKOUT
(BW LIMIT)
2V/DIV
500ns/DIV
3581 TA02b
2MHz, 5V, 1.1A Boost Converter Operates from an Input Range of 2.8V to 4.2V
VIN
2.8V TO 4.2V
C1
3.3µF
L1
0.68µH
D1
43.2k
SW1 SW2
100k
VIN
FB
LT3581
FAULT
GATE
SHDN
RT
CLKOUT
VC
SYNC
SS
GND
45.3k
68pF
0.1µF
VOUT
5V
1.1A
C2
22µF
6.98k
1.5nF
3581 TA03a
C1: 3.3µF, 16V, X7R, 1206
C2: 22µF, 16V, X7R, 1210
D1: DIODES INC. PD3S230H-7
L1: VISHAY IHLP1616 BZ-01-OR68 (ONLY 4.1mm × 4.5mm × 2mm)
Efficiency and Power Loss at VIN = 3.3V
90
2000
85
1800
1600
80
1400
75
1200
70
1000
65
800
600
60
400
55
200
50
0
0
200 400 600 800 1000 1200
LOAD CURRENT (mA)
3581 TA03b
28
For more information www.linear.com/LT3581
3581fb
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