BD8961NV ROHM Co. Ltd., BD8961NV Datasheet - Page 12

• Manufacturer Part Number: BD8961NV
• Description: Low Noise Step-down Switching Regulator
• Manufacturer: ROHM Co. Ltd.

●BD8961NV Cautions on PC Board layout
●Recommended components Lists on above application
*The parts list presented above is an example of recommended parts. Although the parts are sound, actual circuit
characteristics should be checked on your application carefully before use. Be sure to allow sufficient margins to
accommodate variations between external devices and this IC when employing the depicted circuit with other circuit
constants modified. Both static and transient characteristics should be considered in establishing these margins. When
switching noise is substantial and may impact the system, a low pass filter should be inserted between the VCC and PVCC
pins, and a schottky barrier diode established between the SW and PGND pins.
① For the sections drawn with heavy line, use thick conductor pattern as short as possible.
② Lay out the input ceramic capacitor CIN closer to the pins PVCC and PGND, and the output capacitor Co closer to the
③ Lay out CITH and RITH between the pins ITH and GND as near as possible with least necessary wiring.
Symbol
C
R
pin PGND.
C
C
※ SON008V5060 (BD8961NV) has thermal FIN on the reverse of the package.
L
ITH
ITH
IN
O
The package thermal performance may be enhanced by bonding the FIN to GND plane which take a large area of
PCB.
Coil
Ceramic capacitor
Ceramic capacitor
Ceramic capacitor
Resistance
Part
R
C
③
ITH
ITH
1
2
3
4
VOUT
V
ITH
GND
CC
680pF
2.2uH
12kΩ
Value
22uF
22uF
Fig.32 Layout diagram
12/15
Manufacturer
PGND
murata
PV
Kyocera
Kyocera
Rohm
SW
TDK
EN
CC
8
7
6
5
C
②
IN
L
CM32X5R226M10A
EN
LTF5022-2R2N3R2
V
CM316B226M06A
CC
MCH03Serise
Series
C
o
①
GND
V
OUT