參數(shù)資料
型號(hào)： R1230D121H-TL
廠商： RICOH COMPANY LTD
元件分類： 穩(wěn)壓器
英文描述： SWITCHING REGULATOR, 920 kHz SWITCHING FREQ-MAX, PDSO8
封裝： 0.9 MM HEIGHT, SON-8
文件頁(yè)數(shù)： 19/20頁(yè)
文件大?。?/td> 401K
代理商： R1230D121H-TL
Rev. 1.20
- 8 -
s
TYPICAL APPLICATION AND TECHNICAL NOTES
1) Fixed Output Voltage Type
CIN
COUT
AGND
MODE
VOUT
CE
VDD
PGND
Lx
VIN
LOAD
L
VOUT
L
: 10
H LQH3C100K54 (Murata)
COUT: 10
F ECSTOJX106R (Panasonic)
CIN : 10
F C3216JB0J106M (TDK)
VFM mode may work with a parasitic diode, but we recommend that VFM mode used with an external diode in
between Lx and GND. As for PWM mode, an external diode is not necessary.
2) Adjustable Output Voltage Type
Rb
Cb
CIN
COUT
AGND
MODE
VFB
CE
VDD
PGND
LX
VIN
LOAD
R1
R2
L
VOUT
L
: 10
H LQH3C100K54 (Murata)
COUT: 10
F ECSTOJX106R (Panasonic)
CIN : 10
F C3216JB0J106M (TDK)
VFM mode may work with a parasitic diode, but we recommend that VFM mode used with an external diode in
between Lx and GND. As for PWM mode, an external diode is not necessary.
As for how to choose Cb, Rb, R1, and R2 values, refer to the technical notes.
When you use these ICs, consider the following issues;
q
Input same voltage into Power Supply pins, VIN and VDD. Set the same level as AGND and PGND.
q
When you control the CE pin and MODE pin by another power supply, do not make its "H" level more than the
voltage level of VIN / VDD pin.
q
Set external components such as an inductor, CIN, COUT as close as possible to the IC, in particular, minimize the
wiring to VIN pin and PGND pin.
q
At stand by mode, (CE=”L”), the Lx output is Hi-Z, or both P-channel transistor and N-channel transistor of Lx pin
turn off.
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