L6996

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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

C1

+5V

+5V

U7

U5

U6

U8

U2

PGOOD

GNDSENSE

C2

+5V

OVP

VPR

C3

+5V

Q8

Q7

Q6

U4

U3

Rout

VOUTSENSE

+5V

+5V

+5V

+5V

+5V

+5V

+5V

+5V

R18

R19

R24

C7

+5V

R20

R21

R22

R23

SHDN

DPSLVR

+5V

DPSLP

+5V

VID4:0

GMUXSEL

U9

R14

D2

L6996

PGOOD

OVP

VPROG

VFB+

VFB-

CS-

CS+

GND

PGND

LGATE

PHASE

HGATE

ILIM

BOOT

OSC

SS

VID4:0

R2..R6

R1

C10

R9

R7

C4

R16

C9

R15

C6

R8

VIN

VOUT

GND

C8

C11

R11

R10

Q5

R12

R13

R17

C5

SHDN

+5V

C18..C23

C12..C17

L1

GND

GND

D1

Q3,4,5

Q1,2

+5V

+5V

U1