R1161N081A Datasheet, PDF (34/44 Pages) RICOH electronics devices division – 3-MODE 300mA LDO REGULATOR

R1161x
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 40PV (Avg.) are marked as the hatched area in the graph.
<Test conditions>
(1) Frequency band: 10Hz to 2MHz
(2) Temperature: 25qC
R1161x08xx (ECO=H)
VIN=1.4V to 6.0V,
CIN = Ceramic 1.0PF COUT = Ceramic 1.0PF
100
R1161x08xx (ECO=L)
VIN=1.4V to 6.0V,
CIN = Ceramic 1.0PF COUT = Ceramic 1.0PF
100
10
10
1
1
0.1
0.1
0.01 ₀
50 100 150 200 250 300
Output Current lOUT (mA)
R1161x10xx (ECO=H)
VIN=1.4V to 6.0V,
CIN = Ceramic 1.0PF COUT = Ceramic 1.0PF
100
10
1
0.1
0.01 ₀
50 100 150 200 250 300
Output Current lOUT (mA)
R1161x10xx (ECO=L)
VIN=1.4V to 6.0V,
CIN = Ceramic 1.0PF COUT = Ceramic 1.0PF
100
10
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)
34