L6996
2 APPLICATION INFORMATION
2.1 Demo board description
The demoboard shows the device operation in general purpose applications. The evaluation board needs two
different supplies; one for the IC section (5V), and another for the conversion section (up to 28V). Output current
in excess of 20A can be reached dependently on the MOSFET type. The SW1 is used to start the device (when
the supplies are already present) and to select the VID code (i.e. the output voltage).
Figure 16. Schematic Diagram
C9
R8
+5V
C1
GND
C4
PGOOD
OVP
+5V +5V
R7
R9
R10
R11
Q5
C11
+5V
R2..R6
+5V C10
R1
R16
OSC
BOOT
HGATE
PGOOD
PHASE
OVP
LGATE
L6996
ILIM
PGND
GND
CS+
CS-
SS
VFB-
VFB+
SHDN
VID4:0
VPROG
R15
C7
Q1,2
D1
C5
L1
Q3,4,5
D2
R23
R22
R12
Q6
C6
VPR
VIN
C12..C17
GND
R14
R17
VOUTSENSE
VOUT
C18..C23
GND
Rout
GNDSENSE
R13
C8
R21
R20
Q7 Q8
VID4:0
SHDN
U1
+5V
R19
+5V
R24
GMUXSEL
DPSLP
+5V
U9
+5V
U7
+5V
+5V
U2
U3
+5V
+5V
U8
U4
+5V
+5V
U6
U5
+5V
R18
DPSLVR
+5V +5V
C2
C3
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