BD9152MUV Datasheet, PDF (14/18 Pages) Rohm – Output 1.5A or Less High Efficiency Step-down Switching Regulator with Built-in Power MOSFET

BD9152MUV
Technical Note
●BD9152MUV Cautions on PC Board layout
RITH1
CITH1
RITH2
CITH2
L1
FB1 EN1 SW1 SW1 PGND1
ITH1
PGND1
AGND
PVcc
N.C.
PVcc
AVcc
PVcc
ITH2
PGND2
FB2 EN2 SW2 SW2 PGND2
COUT1
CIN1
CIN2
COUT2
L2
R2
R1
Fig.40 Layout diagram
VOUT1
VOUT2
① Lay out the input ceramic capacitor CIN closer to the pins PVCC and PGND, and the output capacitor Co closer to the
pin PGND.
② Lay out CITH and RITH between the pins ITH and GND as neat as possible with least necessary wiring.
※ VQFN020V4040 (BD9152MUV) has thermal PAD on the reverse of the package.
The package thermal performance may be enhanced by bonding the PAD to GND plane which take a large area of
PCB.
●Recommended components Lists on above application
Symbol
Part
L1,2 Coil
CIN1,CIN2 Ceramic capacitor
Cout1,Cout2 Ceramic capacitor
CITH1 Ceramic capacitor
RITH1 Resistance
CITH2 Ceramic capacitor
RITH2 Resistance
Value
2.2uH
22uF
22uF
680pF
82kΩ
VOUT2=0.8V
VOUT2=1.0V
VOUT2=1.2V
VOUT2=1.5V
VOUT2=1.8V
VOUT2=2.5V
VOUT2=0.8V
VOUT2=1.0V
VOUT2=1.2V
VOUT2=1.5V
VOUT2=1.8V
VOUT2=2.5V
680pF
680pF
680pF
680pF
680pF
680pF
12kΩ
12kΩ
15kΩ
15kΩ
33kΩ
82kΩ
Manufacturer
TDK
Murata
Murata
Murata
Rohm
Murata
Murata
Murata
Murata
Murata
Murata
Rohm
Rohm
Rohm
Rohm
Rohm
Rohm
Series
LTF5022-2R2N3R2
GRM32EB11A226KE20
GRM31CB30J226KE18
GRM18 Series
MCR03 Series
GRM18 Series
GRM18 Series
GRM18 Series
GRM18 Series
GRM18 Series
GRM18 Series
MCR03 Series
MCR03 Series
MCR03 Series
MCR03 Series
MCR03 Series
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 or snubber established between the SW and PGND pins.
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2009.05 - Rev.A