參數(shù)資料
型號(hào)： R1160N321B
廠商： RICOH COMPANY LTD
元件分類： 基準(zhǔn)電壓源/電流源
英文描述： 3-MODE 200mA LDO REGULATOR
中文描述： FIXED POSITIVE LDO REGULATOR, PDSO5
封裝： MINI, PLASTIC, SOT-23, 5 PIN
文件頁(yè)數(shù)： 27/35頁(yè)
文件大?。?/td> 438K
代理商： R1160N321B
R1160x
TECHNICAL NOTES
27
C
1
R1160x
Series
V
DD
V
OUT
ECO
GND
C
2
CE
(External Components)
C1: Ceramic Capacitor 1
μ
F
C2: Tantalum Capacitor 2.2
μ
F
When using these ICs, consider the following points:
1.Mounting on PCB
Make V
DD
and GND lines sufficient. If their impedance is high, noise pickup or unstable operation may result.
Connect a capacitor with a capacitance value as much as 1.0
μ
F or more as C
1
between V
DD
and GND pin, and
as close as possible to the pins.
Set external components, especially the output capacitor, as close as possible to the ICs, and make wiring as
short as possible.
2.Phase Compensation
In these ICs, phase compensation is made for securing stable operation even if the output current is varied.
For this purpose, be sure to use a 2.2
μ
F or more capacitor C
OUT
with good frequency characteristics and ESR
(Equivalent Series Resistance).
(Note: When the additional ceramic capacitors are connected to the Output Pin with Output capacitor for phase
compensation, the operation might be unstable. Because of this, test these ICs with as same external
components as ones to be used on the PCB.)
If you use a tantalum type capacitor and ESR value of the capacitor is large, output might be unstable.
Evaluate your circuit with considering frequency characteristics.
Depending on the capacitor size, manufacturer, and part number, the bias characteristics and temperature
characteristics are different. Evaluate the circuit with actual using capacitors.
相關(guān)PDF資料
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