R1160D081A Datasheet, PDF (28/35 Pages) RICOH electronics devices division – 3-MODE 200mA LDO REGULATOR

R1160x
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 Output 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
(2)Temperature: 25°C
R1160x261x
ECO=H, VIN=3.6V,
CIN=Ceramic 1.0µF, COUT=Ceramic 1.0µF
100
R1160x261x
ECO=L, VIN=3.6V,
CIN=Ceramic 1.0µF, COUT=Ceramic 1.0µF
100
10
10
1
1
0.1
0.1
0.01
0 20 40 60 80 100 120 140 160 180 200
Output Current IOUT(mA)
R1160x261x
ECO=H, VIN=3.6V,
CIN=Ceramic 1.0µF, COUT=Ceramic 2.2µF
100
0.01
0 20 40 60 80 100 120 140 160 180 200
Output Current IOUT(mA)
R1160x261x
ECO=L, VIN=3.6V,
CIN=Ceramic 1.0µF, COUT=Ceramic 2.2µF
100
10
10
1
1
0.1
0.1
0.01
0 20 40 60 80 100 120 140 160 180 200
Output Current IOUT(mA)
0.01
0 20 40 60 80 100 120 140 160 180 200
Output Current IOUT(mA)
28