R1211X Datasheet, PDF (9/33 Pages) RICOH electronics devices division – Step-up DC/DC Controller

s TYPICAL APPLICATIONS AND TECHNICAL NOTES
<R1211X002A/R1211X002C>
Inductor
Diode
C1
C2
VIN
EXT
NMOS C4
DELAY VFB
R3
GND AMPOUT
C5 R4
R1
C3
R2
NMOS: IRF7601 (International Rectifier)
Inductor : LDR655312T-100 10µH (TDK) for R1211X002A
: LDR655312T-220 22µH (TDK) for R1211X002C
Diode: CRS02 (Toshiba)
C1: 4.7µF (Ceramic)
R1: Output Voltage Setting Resistor 1
C2: 0.22µF (Ceramic)
R2: Output Voltage Setting Resistor 2
C3: 10µF (Ceramic)
R3: 30kΩ
C4: 680pF(Ceramic)
R4: 30kΩ
C5: 2200pF(Ceramic)
<R1211X002B/R1211X002D>
Inductor
Diode
C1
C2
VIN
EXT
DELAY VFB
GND
CE
NMOS ^C4
R3
R1
C3
R2
CE Control
NMOS: IRF7601 (International Rectifier)
Inductor: LDR655312T-100 10µH (TDK) for R1211X002B
LDR655312T-220 22µH (TDK) for R1211X002D
Diode: CRS02 (Toshiba)
C1: 4.7µF (Ceramic)
R1: Setting Output Voltage Resistor1
C2: 0.22µF (Ceramic)
R2: Setting Output Voltage Resistor2
C3: 10µF (Ceramic)
R3 : 30kΩ
C4: 680pF(Ceramic)
[Note] These example circuits may be applied to the output voltage requirement is 15V or less. If the output voltage
requirement is 15V or more, ratings of NMOS and diode as shown above is over the limit, therefore, choose other
external components.
Rev. 1.10
-9-