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參數(shù)資料
| 型號： | R1230D1.51A-TL |
| 英文描述： | Analog IC |
| 中文描述： | 模擬IC |
| 文件頁數(shù)： | 8/20頁 |
| 文件大小： | 882K |
| 代理商： | R1230D1.51A-TL |
Rev. 1.15 - 8 -
I
TYPICAL APPLICATION AND TECHNICAL NOTES
1) Fixed Output Voltage Type
C
IN
C
OUT
AGND
MODE
V
OUT
CE
V
DD
PGND
Lx
V
IN
LOAD
L
V
OUT
L
C
OUT
: 10
μ
F ECSTOJX106R (Panasonic)
C
IN
: 10
μ
F C3216JB0J106M (TDK)
: 10
μ
H LQH3C100K54 (Murata)
2) Adjustable Output Voltage Type
Rb
Cb
C
IN
C
OUT
AGND
MODE
V
FB
CE
V
DD
PGND
L
X
V
IN
LOAD
R1
R2
L
V
OUT
L
C
OUT
: 10
μ
F ECSTOJX106R (Panasonic)
C
IN
: 10
μ
F C3216JB0J106M (TDK)
: 10
μ
H LQH3C100K54 (Murata)
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;
G
Input same voltage into Power Supply pins, V
IN
and V
DD
. Set the same level as AGND and PGND.
G
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 V
IN
/
V
DD
pin.
G
Set external components such as an inductor, C
IN
, C
OUT
as close as possible to the IC, in particular, minimize the
wiring to V
IN
pin and PGND pin.
G
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.
G
Use an external capacitor C
OUT
with a capacity of 10
μ
F or more, and with good high frequency characteristics
such as tantalum capacitors.
G
At VFM mode, (MODE=”H”), Latch protection circuit does not operate.
G
If the mode is switched over into PWM mode from VFM mode during the operation, change the mode at light load
current. If the load current us large, output voltage may decline.
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