BD9161FVM_12 Datasheet, PDF (14/19 Pages) Rohm – 2.5V to 4.5V, 0.6A 1ch Synchronous Buck Converter Integrated FET

BD9161FVM
BD9161FVM Cautions on PC Board Layout
Datasheet
Fig.35 Board layout
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
pin PGND.
③ Lay out CITH and RITH between the pins ITH and GND as neat as possible with least necessary wiring.
Recommended Component Lists With Above Applications
Symbol Part
Value
Manufacturer Series
L Coil
4.7μH
TDK
Sumida
VLF5014AT-4R7M1R1
CMD6D11B
RIN Resistance
10Ω
ROHM
MCR03 Series
CIN Ceramic capacitor
10μF
Kyocera
CM316X5R106K10A
CO Ceramic capacitor
10μF
Kyocera
CM316X5R106K10A
Ceramic capacitor
VOUT=1.0V
820pF
murata
GRM18 Series
VOUT=1.2V
560pF
murata
GRM18 Series
CITH
VOUT=1.5V
470pF
murata
GRM18 Series
VOUT=1.8V
470pF
murata
GRM18 Series
VOUT=2.5V
330pF
murata
GRM18 Series
VOUT=1.0V
6.8kΩ
ROHM
MCR03 Series
VOUT=1.2V
8.2Ω
ROHM
MCR03 Series
RITH Resistance
VOUT=1.5V
VOUT=1.8V
12kΩ
12kΩ
ROHM
ROHM
MCR03 Series
MCR03 Series
VOUT=2.5V
15kΩ
ROHM
MCR03 Series
* 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.
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02.MAR.2012 Rev.001