R1122N_17 Datasheet, PDF (20/21 Pages) RICOH electronics devices division – LOW NOISE 150mA LDO REGULATOR

R1122N
TECHNICAL NOTES
Ceramic
VIN Cap.
4 CE
VOUT1 1
R1122Nxx1B
3 VDD
GND
2
Ceramic
Cap.
ESR
Spectrum
Analyzer
S.A
IOUT
Measuring Circuit for white noise; R1122N301B
The relationship between IOUT (output current) and ESR of the output capacitor is shown in the graphs below.
The conditions when the white noise level is under 40μV (Avg.) are indicated by the hatched area in the graph.
(Note: When additional ceramic capacitors are connected to the output pin with the output capacitor for phase
compensation, operation might be unstable. Because of this, test these ICs with the same external components
as the ones to be used on the PCB.)
<Measuring Conditions>
(1)VIN=VOUT+1V
(2)Frequency band: 10Hz to 1MHz
(3)Temperature: 25°C
20