R1215D002F RICOH [RICOH electronics devices division], R1215D002F Datasheet - Page 8

• Manufacturer Part Number: R1215D002F
• Description: STEP-UP DC/DC CONTOLLER
• Manufacturer: RICOH [RICOH electronics devices division]

8
TYPICAL APPLICATIONS AND TECHNICAL NOTES
typical application above. Connect the capacitor as short as possible to the IC.
• In terms of the capacitor for setting delay time of the latch protection, C2 is shown in typical application above.
• Connect a 1µF or more value of capacitor between V
• Connect a capacitor between V
R1215D
Latch delay time depends on this C2 value. Refer to the Latch Protection Operation Timing Chart.
Set the C2 GND as close as possible to the IC GND.
(10µF to 22µF is the capacitance recommendation range.) If the operation of the composed DC/DC converter
may be unstable, use a tantalum type capacitor instead of ceramic type
The capacitance value of C6 is between 0.1µF and 1.0µF.
Use a 1µF or more capacitance value of bypass capacitor between V
Inductor
NMOS
Diode
C1
C2
C3
C4
C5
C6
C7
C1
C2
C6
R5
REFOUT
LDR655312T-100 (TDK)
CPH6415 (Sanyo)
CRS02 (Toshiba)
and GND, C6 as shown in typical application of the previous page.
V
DELAY
GND
V
IN
REFOUT
Inductor
1000pF
2200pF
AMPOUT
1.0µF
1.0µF
1.0µF
1.0µF
15µF
DTC
EXT
V
FB
OUT
and GND, C3 as shown in typical application above.
C5
R6
NMOS
R4
Diode
R1
R2
R3
R4
R5
R6
C7
R3
C4
IN
pin and GND, C1 as shown in the
R1
R2
V
OUT
240k Ω
160kΩ
4.7k Ω
20k Ω
68k Ω
1k Ω
C3