BD9151MUV Datasheet, PDF (12/17 Pages) Rohm – Output 1.5A or Less High Efficiency Step-down Switching Regulator with Built-in Power MOSFET

BD9151MUV
Technical Note
RITH1
R1
CITH1
U1
COUT3
VOUT3
L1
RESET
ITH1
FB1
SW1
SW1
AGND
AVCC
PGATEB
PGND1
PVCC1
PVCC2
PGATE
PGND2
MONI
ITH2 FB2
EN
PGND2
SW2 SW2
COUT1
CIN1
CIN2
COUT2
RITH2
L2
CITH2
VOUT1
VOUT2
Fig.38 External parts sketch
Stable feedback loop may be achieved by canceling the pole fp (Min.) produced by the output capacitor and the load
resistance with CR zero correction by the error amplifier.
fz(Amp.)= fp(Min.)
1
2π×RITH×CITH
=
1
2π×ROMax.×CO
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12/16
2009.08 - Rev.A