R1211D002B RICOH [RICOH electronics devices division], R1211D002B Datasheet - Page 8

• Manufacturer Part Number: R1211D002B
• Description: STEP-UP DC/DC CONTROLLER
• Manufacturer: RICOH [RICOH electronics devices division]

8
TYPICAL APPLICATIONS AND TECHNICAL NOTES
[Note]
requirement is 15V or more, ratings of NMOS and diode as shown above is over the limit, therefore, choose
other external components.
R1211x
These example circuits may be applied to the output voltage requirement is 15V or less. If the output voltage
NMOS
Inductor : LDR655312T-100 10 H (TDK) for R1211x002B
Diode
C1 : 4.7 F (Ceramic)
C2 : 0.22 F (Ceramic)
C3 : 10 F (Ceramic)
C4 : 680pF (Ceramic)
C1
NMOS
Inductor : LDR655312T-100 10 H (TDK) for R1211x002A
Diode
C1 : 4.7 F (Ceramic)
C2 : 0.22 F (Ceramic)
C3 : 10 F (Ceramic)
C4 : 680pF (Ceramic)
C5 : 2200pF (Ceramic)
C1
C2
C2
: IRF7601 (International Rectifier)
: LDR655312T-220 22 H (TDK) for R1211x002D
: CRS02 (Toshiba)
: IRF7601 (International Rectifier)
: LDR655312T-220 22 H (TDK) for R1211x002C
: CRS02 (Toshiba)
V
DELAY
GND
<R1211x002A/R1211x002C>
<R1211x002B/R1211x002D>
V
DELAY
GND
IN
Inductor
IN
Inductor
AMPOUT
EXT
V
CE
FB
EXT
V
FB
R1 : Setting Output Voltage Resistor 1
R2 : Setting Output Voltage Resistor 2
R3 : 30k
R1 : Output Voltage Setting Resistor 1
R2 : Output Voltage Setting Resistor 2
R3 : 30k
R4 : 30k
C5 R4
CE Control
NMOS
Diode
R3
C4
NMOS
Diode
C4
R3
V
OUT
R1
R2
V
OUT
R1
R2
C3
C3