R1131D081A Datasheet, PDF (20/30 Pages) RICOH electronics devices division – Low Voltage 300mA LDO REGULATOR

R1131x
ESR vs. Output Current
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) of which is 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
(2) Temperature: 25°C
R1131x08xx
VIN=1.4V to 6.0V,
CIN=Ceramic 1.0VµF COUT=Ceramic 1.0µF
100
R1131x10xx
VIN=1.4V to 6.0V,
CIN=Ceramic 1.0VµF COUT=Ceramic 1.0µF
100
10
10
1
1
0.1
0.1
0.01
0
50 100 150 200 250 300
Output Current lOUT (mA)
R1131x26xx
VIN=3.0V to 6.0V,
CIN=Ceramic 1.0VµF COUT=Ceramic 1.0µF
100
0.01
0
50 100 150 200 250 300
Output Current lOUT (mA)
R1131x15xx
VIN=2.0V to 6.0V,
CIN=Ceramic 1.0VµF COUT=Ceramic 1.0µF
100
10
10
1
1
0.1
0.1
0.01
0
50 100 150 200 250 300
Output Current lOUT (mA)
0.01
0
50 100 150 200 250 300
Output Current lOUT (mA)
20