R1282D002A Datasheet, PDF (16/18 Pages) RICOH electronics devices division – 2CH PWM DC/DC CONTROLLER

R1282D002A
TYPICAL APPLICATION AND TECHNICAL NOTES
VOUT1
C1
R1
R2
Diode
L1
C3
NMOS
C6
C9
R7
R5
R11 _{C4 R8}
EXT1 EXT2
GND
VIN
AMPOUT1
Vrefout
DTC1 DTC2
VFB1
VFB2
PMOS
L2
R9
C8
C7
C5 ^R10
Diode
R6
VOUT2
R3
C2
R4
Components examples
Inductor L1,2
Diode
PMOS
NMOS
6.8µH LDR655312T (TDK)
FS1J3 (Origin Electronics)
Si3443DV (Siliconix)
IRF7601 (International Rectifier)
Resistance As setting resistors total value for the output voltage, R1+R2, R3+R4 recommendation value is
100kW or less.
R1=47kΩ
R2=5.1kΩ
R3=30kΩ
R4=20kΩ
R5=43kΩ R6=10kWΩ
R7=R9=22kΩ R8=R10=43kΩ R11=220kΩ
Capacitors Ceramic Type
C1=C2=10µF C3=4.7µF
C7=50pF
C8=1µF
C4=0.22µF
C9=1000pF
C5=0.47µF
C6=120pF
Note) Consider the ratings of external components including voltage tolerance. With the transistor in the circuit
above, VOUT=15V is the voltage setting limit.
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