LT3580
TYPICAL APPLICATIONS
5V to 12V Boost Converter Switches at 2.5MHz and Uses a Tiny 4mm × 4mm × 1.7mm Inductor
L1
3.3μH
D1
V
OUT
V
5V
IN
12V
500mA
C2
4.7μF
V
SW
GND
IN
SHDN
130k
LT3580
RT
FB
VC
SYNC
SS
10k
2.2nF
47pF
C1
4.7μF
35.7k
0.1μF
3580 TA07a
C1, C2: 4.7μF, 25V, X5R, 1206
D1: MICROSEMI UPS120
L1: COILCRAFT LPS4018-332ML
Efficiency and Power Loss
vs Load Current
1400
95
90
85
80
75
70
65
60
55
1200
1000
800
600
400
200
0
50
0
100
200
300
600
400
500
LOAD CURRENT (mA)
3580 TA07b
Transient Response with 400mA to
500mA to 400mA Output Load Step
Start-Up Waveforms
V
OUT
5V/DIV
V
OUT
0.5V/DIV
AC COUPLED
I
L
1A/DIV
I
L
0.5A/DIV
V
SHDN
1V/DIV
3580 TA07d
3580 TA07c
500mA LOAD
2ms/DIV
100μs/DIV
3580fc
24
Linear [ Linear ]
