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LR1121BL-27-AF5-A-R Fiches technique(PDF) 4 Page - Unisonic Technologies

No de pièce LR1121BL-27-AF5-A-R
Description  HIGH RIPPLE-REJECTION LDO REGULATOR
PDF  6 Pages
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Fabricant  UTC [Unisonic Technologies]
Site Internet  http://www.utc-ic.com
Logo UTC - Unisonic Technologies

LR1121BL-27-AF5-A-R Fiches technique(HTML) 4 Page - Unisonic Technologies

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LR1121B
CMOS IC
UNISONICTECHNOLOGIESCO.,LTD
4 of 6
www.unisonic.com.tw
QW-R502-101.G
TEST CIRCUIT
Note:
Input capacitor (CIN): 1.0 μF or more
Output capacitor (CL): 2.2μF or more (tantalum capacitor)
SELECTION OF OUTPUT CAPACITOR (CL)
In this IC, phase compensation and the output capacitor is made for securing stable operation even if the load
current is varied. Therefore, always place a capacitor (CL) of 2.2 μF or more between VOUT and VSS pins. Using a
capacitor whose ESR is outside the optimum range (approximately 0.5 ~ 5Ω), whether larger or smaller, may cause
an unstable output, resulting in oscillation. For this reason, a tantalum electrolytic capacitor is recommended.



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