Technical Note
 
7/18 
www.rohm.com
2009.08 - Rev.A
?2009 ROHM Co., Ltd. All rights reserved.
BD9153MUV 
EN
FB2
SW2
ITH2
PGND2
SW2
PGND2 PVCC2 PVCC2 PVCC1 PVCC1PGND1
PGND1
SW1
VS
FB1
ITH1
GATE
FB3
VCC
DET
RST
GND
RITH2
CITH2
L2
R4
R3
C 2
R8
R7
C 1
R2
R1
CO2
L1
CITH1
RITH1
R5
R6
CO3
M1
R9
  
  
 
SW
1
CO1
Cfb
Advantage 3
鸖upplied in smaller package due to small-sized power MOS FET incorporated.
 
 
 
 
Reduces a mounting area required.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Fig.28
 
鸒utput capacitor Co required for current mode control: 22糉 ceramic capacitor
鸌nductance L required for the operating frequency of 1 MHz: 2.2糎 inductor
鸌ncorporates FET + Boot strap diode
50mm
50mm
CITH1
RITH1
CIN1
CIN2
COUT1
COUT2
R2
R1
M1
RITH2
COUT3
R5 C1 R6
R3
R4
R7
R8
R9
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