BD9763FVM Datasheet, PDF (7/12 Pages) Rohm – Single-output Step-up,High-efficiency Switching Regulator (Controller Type)

BD9763FVM
●Recommended board patterns
VOUT
Technical Note
R1
R2
Lay out by the shortest pattern.
VCC
Short GNDs at one point as this figure.
Di
FET
L
＊^C1
＊ ^C2
1μF
VCC
OUT
GND
VREF
RT
CTL/SS
FB
INV
＊ RRT
H:OFF
L:ON
*Place these parts with attention about patterns shown in following Fig.7
Fig.10
VCC
VCC
RT
RT
RRT
OUT
GND
C1
C1
C2
VREF
OUT
GND
VREF
CTL/SS
FB
INV
C1 : Capacitor terminals have to be close enough to terminals of VCC and GND.
It is safe to pass OUT signal line under C1.
C2 : Capacitor terminals have to be close enough to terminals of VREF and GND.
R1 : Pattern area has to be small enough to reduce parasitic capacitance of RT terminal.
Fig.11 Recommended board patterns
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7/11
2009.05 - Rev.A