R1163 Datasheet, PDF (29/30 Pages) RICOH electronics devices division – 3-MODE 150mA LDO REGULATOR with the Reverse Current Protection

R1163x
TECHNICAL NOTES
When using these ICs, consider the following points:
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 capacitor COUT with good frequency characteristics and ESR (Equivalent Series
Resistance) in the range described as follows:
The relations between IOUT (Output Current) and ESR of Output Capacitor are shown below. The conditions
when the white noise level is under 40µV (Avg.) are marked as the hatched area in the graph.
<Test conditions>
(1) Frequency band: 10Hz to 2MHz
R1163x151x ECO=H
VIN=2.0V to 6.0V, CIN=1μF COUT=0.47μF
100
Topt=85°C Topt=25°C
Topt=-40°C
10
R1163x151x ECO=L
VIN=2.0V to 6.0V, CIN=1μF COUT=0.47μF
100
10
1
1
0.1
0.1
0.01
0
20 40 60 80 100 120 140
Load Current IOUT(mA)
R1163x281x ECO=H
VIN=3.1V to 6.0V, CIN=1μF COUT=0.47μF
100
Topt=85°C Topt=25°C
Topt=-40°C
10
0.01
0
20 40 60 80 100 120 140
Load Current IOUT(mA)
R1163x281x ECO=L
VIN=3.1V to 6.0V, CIN=1μF COUT=0.47μF
100
10
1
1
0.1
0.1
0.01
0
20 40 60 80 100 120 140
Load Current IOUT(mA)
0.01
0
20 40 60 80 100 120 140
Load Current IOUT(mA)
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