LT3580
TYPICAL APPLICATIONS
–5V Output Inverting Converter Switches at 2.5MHz and Accepts Inputs Between 3.3V to 12V
C3
1μF
L1
4.7μH
L2
4.7μH
V
OUT
V
IN
–5V
3.3V TO 12V
800mA (V = 12V)
IN
620mA (V = 5V)
IN
C2
10μF
D1
V
SW
GND
450mA (V = 3.3V)
IN
IN
SHDN
60.2k
LT3580
RT
FB
VC
SYNC
SS
10k
100pF
C1
2.2μF
35.7k
0.1μF
2.2nF
3580 TA08a
C1: 2.2μF, 25V, X5R, 1206
C2: 10μF, 25V, X5R, 1206
C3: 1μF, 50V, X5R, 0805
D1: CENTRAL SEMI CMMSH1-40
L1, L2: COILCRAFT LSP4018-472ML
Efficiency and Power Loss
vs Load Current
1200
85
80
75
70
65
60
55
50
45
V
= 5V
IN
1000
800
600
400
200
0
40
0
100 200 300
600 700
400 500
LOAD CURRENT (mA)
3580 TA08b
3580fc
25