Datasheet

LT3579/LT3579-1
18
35791fa
For more information www.linear.com/LT3579
APPLICATIONS INFORMATION
Figure 11. Suggested Component Placement for Inverting Topology in FE20 Package.
Note Separate Ground Path for D1’s Cathode
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
21
GND
C
IN
V
IN
–
+
–V
OUT
GND
C
OUT
A
C
B
SYNC
CLKOUT
SHDN
VIAS TO GROUND PLANE REQUIRED TO IMPROVE
THERMAL PERFORMANCE
A– RETURN C
IN
GROUND DIRECTLY TO LT3579 EXPOSED PAD PIN 21. IT IS ADVISED TO NOT COMBINE C
IN
GROUND WITH GND EXCEPT AT THE EXPOSED PAD.
B– RETURN C
OUT
GROUND DIRECTLY TO LT3579 EXPOSED PAD PIN 21. IT IS ADVISED TO NOT COMBINE C
OUT
GROUND WITH GND EXCEPT AT THE EXPOSED PAD.
C– RETURN D1 GROUND DIRECTLY TO LT3579 EXPOSED PAD PIN 21. IT IS ADVISED TO NOT COMBINE D1 GROUND WITH GND EXCEPT AT THE EXPOSED PAD.
L1, L2 – MOST COUPLED INDUCTOR MANUFACTURERS USE CROSS PINOUT FOR IMPROVED PERFORMANCE.
35791 F11
C1
D1
L1 L2