參數(shù)資料
型號: R1140Q401B-TR
廠商: RICOH COMPANY LTD
元件分類: 基準(zhǔn)電壓源/電流源
英文描述: SC82 120mA LDO REGULATOR
中文描述: 4 V FIXED POSITIVE LDO REGULATOR, 0.3 V DROPOUT, PDSO4
封裝: SC-82AB, 4 PIN
文件頁數(shù): 6/18頁
文件大?。?/td> 181K
代理商: R1140Q401B-TR
R1140Q
5
ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE
Topt = 25°C
Dropout Voltage
V
DIF
(V)
Output Voltage
V
OUT
(V)
Condition
TYP.
MAX.
1.5
V
OUT
1.6
0.36
0.70
1.7
V
OUT
1.8
0.30
0.50
1.9
V
OUT
2.0
0.28
0.45
2.1
V
OUT
2.7
0.24
0.40
2.8
V
OUT
4.0
I
OUT
= 120mA
0.18
0.30
TECHNICAL NOTES
When using these ICs, consider the following points:
Phase Compensation
In these ICs, phase compensation is made for securing stable operation even if the load current is varied. For this
purpose, be sure to use a 2.2μF or more capacitor C
OUT
with good frequency characteristics and ESR (Equivalent Se-
ries Resistance).
(Note: When the additional ceramic capacitors are connected to the Output Pin with Output capacitor for phase com-
pensation, the operation might be unstable. Because of this, test these ICs with as same external components as ones
to be used on the PCB.)
PCB Layout
Make V
DD
and GND line sufficient. When the impedance of these is high, it would be a cause of picking up the noise
or unstable operation. Connect a capacitor with as much as 1.0μF capacitor between V
DD
and GND pin as close as pos-
sible.
Set external components, especially output capacitor as close as possible to the ICs and make wiring shortest.
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