LT8580
25
8580fa
For more information www.linear.com/LT8580
750kHz, –15V Output Inverting Converter Accepts 5V to 40V Input
Typical applicaTions
Efficiency and Power Loss (V
IN
= 12V)
60mA to 160mA to 60mA Output Load Step (V
IN
= 12V)
C
OUT
4.7µF
V
OUT
–15V
90mA (V
IN
= 5V)
210mA (V
IN
= 12V)
420mA (V
IN
= 40V)
L1
22µH
L2
22µH
C1
1µF
D1
182k
V
IN
5V TO 40V
V
IN
SW
8580 TA03a
LT8580
10k
13.7k
113k
SHDN
GND
FBX
VCSYNC
SSRT
10nF
47pF
0.22µF
C
IN
4.7µF
• •
L1, L2: COILCRAFT 22µH MSD7342-223
D1: CENTRAL SEMI CMMSH1-60
C
IN
: 4.7µF, 50V, 1206, X5R
C
OUT
: 4.7µF, 25V, 1206, X7R
C1: 1µF, 100V, 0805, X7S
LOAD CURRENT (mA)
0
10
EFFICIENCY (%)
POWER LOSS (mW)
30
40
50
100
90
8580 TA03b
20
50
150
200
60
70
80
0
240
400
640
320
80
160
480
560
EFFICIENCY
POWER LOSS
V
OUT
200mV/DIV
AC-COUPLED
I
STEP
100mA/DIV
I
L1
+ I
L2
200mA/DIV
200µs/DIV
8580 TA03c
